CA1275213C - Connector for peritoneal dialysis - Google Patents
Connector for peritoneal dialysisInfo
- Publication number
- CA1275213C CA1275213C CA 506509 CA506509A CA1275213C CA 1275213 C CA1275213 C CA 1275213C CA 506509 CA506509 CA 506509 CA 506509 A CA506509 A CA 506509A CA 1275213 C CA1275213 C CA 1275213C
- Authority
- CA
- Canada
- Prior art keywords
- connector piece
- connection
- female connector
- male connector
- valve plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S604/00—Surgery
- Y10S604/905—Aseptic connectors or couplings, e.g. frangible, piercable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/9029—With coupling
Abstract
Abstract Connector for peritoneal dialysis A connector (2) for peritoneal dialysis comprises a female connector piece (4) and a male connector piece (6). The male connector piece comprises a central tube section (22) whose diameter tapers at a step (26). Furthermore, the female connector piece (4) comprises a valve means (53) which consists of an annular seal (54) and a valve plate (58) which is pressed by means of a pressure spring (60) against the sealing ring (54). On connection of the female connector piece (4) with the male connector piece (6) at least one pin (46) on the male connector piece engages in a guide groove (48) which is formed in a sleeve (10) in which the female connector piece (4) is provided. The guide groove (48) comprises a staircase or step-like form so that the female connector piece (4) can assume relatively to the male connector piece (6) three defined connection states, said three connection states effecting that the tube section (22) in cooperation with the valve means (52) releases or blocks fluid passages between a first connection (18), a second connection (32) and a third connection (36).
The third connection (36) serves for connecting an empty bag for the used dialysis solution and is arranged to-gether with the first connection (18) for the supply of fresh dialysis solution on the male connector piece (6).
The third connection (36) serves for connecting an empty bag for the used dialysis solution and is arranged to-gether with the first connection (18) for the supply of fresh dialysis solution on the male connector piece (6).
Description
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The invention relates to a connector fvr a CAPD tube connection to a male connector piece having a central tube section which is en~aged and surrounded by a protective sleeve, and a female connector piece which comprises a valve ~eans which in the uncoupled state represents a fluid barrier, the introduction portion being introducible in liquid-tight manner into a receiving region of the protection sleeve with a seal between the protective sleeve and the female connector piece, a f~rst connection on the male connector piece for a full bag with dialysis solution, the first connection being in fluid connection with the central tube section, a second connection on the female connector piece to which a peritoneal catheter is connectable, and a connect-ing means for securing a connection position between the female and the male connector piece.
' Such a connector is described for example in German utility model 7,836,790 or EP-OS 116j986. Such a catheter lS used in continual ambulant peritoneal dialysis (CAPD) in which a catheter remains permanently in the peritoneaI cavity of a patient. Such a catheter projects through the ab-dominal wall of a patient and is connected to one part of the connector, ~he other part o~ the connector beinq con-nected via a flexible tube to a bag containing dialysis solution. In the connected state the dialysis solution can be supplied to the patient for removing metabolism products and also removed from the patient again.
Problematical in such dialysis treatment is the replacement of a bag containing used dialysis solution by a bag contain-ing fresh dialysis solution because the connector must be opened and this must take place under absolutely sterile conditions. The patient must open the connector with extreme care, the used bag being dispensed with and replaced by a fresh bag with a corresponding new sterile connector piece.
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~.~'7S~3 The connector of the type mentioned at the beginning already comprises a protective sleeve on the ma]e connector piece and it is not possible for the corresponding connecting faces of the connector to come into contact with the fingers.
Furthermore, in the connected state between the connector pieces a space to be filled with disinfectant is provided which is intended to eliminate any contaminations which may nevertheless arise. ~owever, this known connector can only be used by specially trained patients who carry out these measures correspondingly carefully and exactly.
With elderly or weak patients the problems in handling this connector are obvious so that further solutions of these problems were sought.
Thus, for example, EP-OS 29 526 proposes a bag system for peritoneal dialysis in which from the peritoneal catheter or from the connecting tube in Y manner a further tube branches which is connected to a further bag. Al~ flexible tube portions can be closed by clips or clamps so that specific fluid passages may be opened or closed. Thus, dialysis solution can be conveyed from the full bag through the connector into the peritoneal cavity, from the full bag through the connector into the empty bag and from the peritoneal cavity into the empty bag.
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This known system with Y-shaped branching has however the disadvantage that simple plug members are used for a connector which are not secured against contamination; in addition, the Y-shaped branching is one of the flexible tube sections so that solution residues which may be con-taminated or a risk to the patient due to toxicity (dis-infectant) can reach the peritoneal cavity of the patient.
There is also a dan~er that particles which might be generated when the male connector piece is opened can also reach the body of the patient.
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~75~3 01 AS a result, ~or a thorough flushing or rinsing of the male 02 connector piece or the entire connector ~irstly careful 03 handling of the roller clamps is necessary to enable the 04 flushing operation to ~e carried out properly without any 05 danger to the patient and secondly a considerable amount of 06 water is wasted for pure flushing purposes.
08 Further connectors for medical purposes, although not for use 09 in CAPD, are known ~rom EP-OS 135 140 and 80 379. These connectors are effectively concerned only with a reliable 11 closure of a connector piece in the unconnected state but not 12 with complete sterility on connection.
14 The problem underlying the present invention is therefore to provide a connector for a dual-bag system for continual 16 ambulant peritoneal dialysis which obviates the aforementioned 17 disadvantages, i.e. in which troublesome roller clamps 18 complicated to handle are dispensed with and a rapid and 19 reliable flushing of the connector with a minimum of dialysis solution is possible.
22 This problem is solved in that on the male connector piece in 23 the region of the first connection on the protective sleeve a 24 third connection is disposed for an empty bag for used dialysis solution and that the valve means in dependence upon the 26 connection position of the female connector piece relatively to 27 the male connector piece and in cooperation with the central 28 tube section of the male connector piece free or interrupt 29 ~luid passages between the first, second and third connections.
31 In accordance with an embodiment of the invention the fluid 32 passages between the full bag, peritoneum and empty bag are 33 ~reed and interrupted in accordance with the particular 34 requirements in dependence upon the connection state of the male connector piece relatively to the female connector piece 36 the connection for the empty bag being disposed on the female 37 _ ~ _ , .:, . ' .
01 connector in the region oE the connection Eor the full bag so 02 that on the one hand roller clamps can be dispensed with, 03 because the fluid passages are freed or interrupted solely by 04 corresponding manipulations of the connector, and on the other 05 hand by dispensing with a Y piece between the female connector 06 and the peritoneal catheter only the connector itself and not U7 the associated Elexible tubing need be flushed so that the 0~ flushing operation itself can be carried out in relatively 09 short time with small expenditure of dialysis solution.
11 DE-OS 2,853,635 and US-PS 4,346,793 disclose connectors for 12 CAPD of the type mentioned at the beginning which each comprise 13 a male and female connector piece which are each connected to 14 flexible tubing. Since these connectors in the coupled state free t~e flow connection between the peritoneal cavity and the 16 bag, the tubing must always appropriately be shut off by a 17 clamp to prevent unintentional exit or entry of the dialysis 18 solution from the bag or into the bag. Furthermore, the 19 connector itself cannot be completely cleaned from residual disinfectant and consequently there is a danger that residual 21 disinfectant can reach the peritoneal cavity of the patient 22 during the filling with fresh dialysis solution.
24 More particularly, an embodiment of the invention is a continual ambulant peritoneal dialysis tube connection device 26 comprising a male connector piece having a central tu~e section 27 joined to and surrounded by a protective sleeve, a receiving 28 region between the central tube and the protective sleeve, a 29 first connection apparatus for connecting a first dialysis 3~ solution bag, and a third connection apparatus for connecting a 31 second dialysis solution bag. The connection device also 32 includes a female connector piece having a valve apparatus, an 33 introduction portionr a second connection apparatus for 34 connecting a peritoneal catheter, and an annular seal. The valve apparatus has a valve plate for providing a fluid barrier ~j, , , ,~
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'S~f ~3 01 in its uncoupled state prohibiting the flow of fluids through 02 its elongated axial ~irection. The introduction portion forms 03 a liquid-tight seal between the protective sleeve on the male 04 connector piece and the female connector piece after being 05 inserted into the receiving region. The first connection 06 apparatus is in fluid communication with the central tube 07 section. The valve apparatus cooperates with the central tube 08 section and the inserted position of the female connector 09 within the protective sleeve providing for selective fluid communication between any two of the first connection 11 apparatus, the second connection apparatus, and the third 12 connection apparatus. The central tube section has a mouth 13 opening forming a fluid-tight seal with the valve plate when 14 the mouth opening contacts the valve plate. As a result the male connector piece in a first coupling position with the 16 female connector piece in fluid-tight manner with the annular 17 seal effects a first fluid passage from the first connection 18 apparatus to the third connection apparatus, and whereby in a 19 second coupling position by the central tube section of the male connector piece interacting with the valve apparatus 21 within the female connector piece opens the valve. The mouth 22 opening of the central section has a fluid-tight sealing manner 23 on the valve plate. The front portion passing through an 24 opening of the annular seal effects a second fluid passage from the second connection apparatus to the third connection 26 apparatus. When in the third coupling position the main 27 portion of the central tube section of the male connector piece 28 forms a fluid-tight seal with the annular seal of the female 29 connector piece and the valve plate is tilted from the mouth opening of the central tube section forming a third fluid 31 passage from the first connection apparatus to the second 32 connection apparatus. Each of the coupling positions are 33 predetermined and lockable by a connection apparatus.
Further details, features and advantages of the present 36 invention will be apparent from the following description of an 37 example of e~bodiment with the aid of the drawings, wherein:
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5~.3 Fig. l is a sec-tional view of a connector accordiny to -the invention comprising a male connector piece and a female connector piece, the two connector pieces being shown in the unconnected state;
Fig. 2 is a plan view from below of the male connector piece;
Fig. 3 shows in sectional view the position of the male connector piece with respect to the female connec-tor piece in a first connection state;
Fig. 4 shows-the position o~ the male connector piece with respect to the female connector piece in a second connection state;
Fig. 5 shows the position of the male connector piece to the female connector piece in a third connection state;
Fig. 6 shows the position of the male ~onnector piece to the female connector piece in a fourth connection state; and Fig. 7 shows a guide groove on the female connector piece in a developed representation.
In accordance with Fig. l a connector 2 comprises a female connector piece 4 and a male connector piece 6. The female connector piece 4 comprises a connector unit 8 which is mounted in a~first sleeve lO!behind an introduction portion 12.
Female connector piece 6 comprises a receiving region 14 for receiving the male connector piece 4~ Furthermore, the male connector piece 6 cornprises at its end opposite the receiving region 14 a first connection 18 for a flex-ible tube 20, the tube 20 establishlng the connection line ~ 'v ~ --6--. -- - ~ . . . ..
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' , : . . - ' ' ' ' ~- ' , 7~ .3 between a full bag with fresh dialysis solution not illustrated in the drawings and the male connector piece 6. The securing of the tube 20 to the first connection 18 may for example be by adhering or the like. As apparent from the drawings, the connection 18 extends through the sleeve 21 and merges in the direction towards the receiv-ing region 14 into a central tube section 22 which is arranged coaxially with the sleeve 21 in the male connector piece 6 and comprises in its front portion 30 a mouth 'openiny 24.
As further apparent from the drawings,'the external dia-meter of the tube section 22 is not constant considered over its entire length; on the contrary, the tube section 22 comprises a main portion 28 which at a step 26 merges into a front portion 30 whose external diameter is less than that of the main portion 28. Both portions have an axial length significant for the respective connection phases.
The female connector piece 4 comprises at its end opposite the introduction portion 12 a second connection 32 for a second flexibl~ tube 34 which leads to a peritoneal catheter not illustrated in the drawings. The securing of the second tube 34 to the second connection 32 is for example by a clamp connection between the second connection 32 and the sleeve 10, by shrinking the tube 34 onto the second connection 32, by adhering, or the like.
The male connector piece 6 comprises a third connection 36 originating from the sleeve 21 for a third flexible tube 38 which establishes a connection b'etween the male connector piece 6 and an empty bag for used dialysis solution. This third connection 36 is advantageously disposed in the vicinity of the first connection 18.
The receiving region 14 of the ~ale connector piece is ~ .
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~.~75~3 open by an opening 40 in the direction towards the female connector pi.ece 4 to be introduced. Furthermore, -the sleeve 21 of the male connector piece 6 comprises two regions of different internal diameters, a first sleeve region having an internal diameter which is grea-ter than the external diameter of the introduction portion 12 of the sleeve 10 of the female connector piece, and a second sleeve region 44 which adjoins the first sleeve region 42 and has an internal diameter which is at least approxi-mately equal to, preferably somewhat greater than, the external diameter of the introduction portion 12 of the female connector piece 6.
In the region of the opening 40 of the male connector piece 6 at least one and in the embodiment illustrated two pins 46 project radially inwardly from the first sleeve region 42. The radial extent of the pins 46 inwardly and their external ~iameter are dimensioned so that a form locking engagement is possible with a guide groove 48 which is provided in a guide portion of the first sleeve 10 as will be explained in detail hereinafter with reference. to Figs. 3 to 7.
In the interior of the female connector piece 4 a valve means 52 is disposed. This valve means 52 comprises essentially an annular seal 54 made of suitable elasto-meric material and held in an annular recess 56 in the .inner wall of the introduction portion 12 of the first sleeve 10. The retaining of the seal 54 in the recess 56 is by adhering, force fit, a~spring ring or the like.
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The diameter of the opening 57 of the seal 54 is at least approximately equal to, preferably somewhat less than, an external diameter D of the main portion 28 of the tube section 22 in the male connector piece 6. On the other hand, the diameter of the opening 57 is greater than the external diameter E of the front portion 30 of the tube section 22.
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Furt~ermore, the valve means 52 in the connector piece 4 comprises a valve plate 58 whlch by a suitable spring means, for example by a spiral pressure spring 60, is held in liquid-tight engagement with the annular sealing washer 54. The valve plate 58 is disposed between the seal 54 and the second connection 32 in the female connector piece 4.
The pressure spring 60 bears with its one end on a suitable spring seat 62 and a suitable configuration of the contour of the valve plate 58 facing the spring permits a form-locking engagement between the valve plate 58 and the pressure spring 60. In the region between the valve plate 58 and the spring seat 62 on the inner contour of the female connector piece 6 a stop 64 is provided in the form of a projecting region.
In the outer end region of the introduction portion 12 of the female connector piece 4, preferably adjacent the introduction opening 65, an annular sealing element is disposed, for example an O ring 66 which is advantageously let into an annular groove which is disposed on the outer surface of the female connector piece 4.
Hereinafter the mode of operation of the present connector will be described, in particular with reference to Figs.
1 and 3 to 7:
In the state according to Fig. 1, i.e. in the unconnected state, both the female connector piece 4 and the male connector piece 6 are sealed with a cap, not illustrated in the drawings, the inner spaces sealed by the cap possibly being sterilized with a suitable disinfectant. To estab-lish a first connection state in accordance with Fig. 3 firstly the two caps are removed and the female connector piece4 is aligned with the male connector piece 6 in such _g_ ., , . . . :
~.~75i'~3 a manner that the pin or pins 46 on the female connector piece 6 are in alignment with an entry portion 68 of the guide groove 48 on the guide portion 50 of the female connector piece 4.
The position of the pin 46 with respect to the guide groove 48 or to the entry 68 is designated in Fig. 7 by A. Fig.
7 shows the guide groove 48 in the developed illustration and it is seen that this is a three-stage bayonet path.
If now the female connector piece 4 is pushed into the male connector piece 6 the pin 46 in the guide groove ~8 first reaches a first coupling position which is marked in Fig. 7 by A'. In this coupling position the female connector piece 4 in the male connector piece 6 reaches a coupling position as shown in Fig. 3 in which the O ring engages sealingly on the inner peripheral surface of the second sleeve region 44 of the male connector piece 6. By relative rotation of the female connector piece 4 with respect to the male connector piece 6 the pin 46 follows the guide groove ~8 and reaches a first locking position which is marked in Fig. 7 by B and in which the first coupling position is secured. In this first coupling position, which i~ shown in Fig. 3 and referred to herein-after as ~lushing position, the ~alve plate 58 o~ the valve means S2 due to the pressure load by the spring 60 remains in liquid-tight engagement with the sealing washer 5~ so that only a fluid passage from the first connection 1~ through the central tube section 22 to the third connection 36 is possible. In this flushing position the full bag with the fresh dialysis solution is now opened, for example by breaking a breakage cone, and fresh dialysis solution flows through the first tube 20, the central tube section 2Z and the third tube 38 into the empty bag. The entering fresh dialysis solution removes both the disinfectant which is disposed in these regions of the male and female connector pieces and particles which can form on opening the breakage cone, and flushes them into the empty bag.
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After the flushing of the connector as second step in the peritoneal dialysis the used dialysis solution is drained from the peritoneal cavity of the patient into the empty bag.
For this purpose the female connector piece 4 is further introduced into the male connector piece 6, the pin 46 in the guide groove 48 reaching~a second position designated in Fig. 7 by B'. A turning of the female connector piece 4 relatively to the male connector piece 6 brings the pin ~6 into a position which is designated in Fig. 7 by C and which corresponds to the coupling position of Fig.
4, in which the second coupling position is secured.
An insertion of the female connector piece 4 into the male connector piece 6 first effects that the mouth opening 24 of the tube section 22 comes into engagement with a surface 70 of the valve plate 58 so that the supply of fresh dialysis solution from the~full bag through the first flexible tube 20 is interrupted. A further move-ment of the female connector piece 4 into the male connector piece 6 (the pin 46 moving into the position B' of Fig. 7) leads finally to the second coupling position of Fig. 9.
Once this second coupling position is reached the female connector piece is turned so that the pin 46 assumes in the guide groove 48 the position C in Fig. 7 in which said second coupling position is locked.
, As apparent from Fig. 4, in said second couplin~ position the valve plate 58 is moved against the spring force of the pressure spring 60 by the central tube section 22 out of engagement with the sealing washer 54 so that a fluid passage becomes free from the second connection 32 of the emale connector piece past the valve plate 58 and through the annular free space 71 formed between the opening 57 of the annular sealing washer 54 and the outer surface of . . , . ` ' ' ~ ', '- ' .. - . : . . .
'' " ' '' . .',' ' 7~ 3 the fron~ portion 30 of the central tu~e section 22 to the third connection 36. The used dlalysis liquid flows through this fluid passage from the peritoneal cavity o~
the patient into the empty bag as indicated in Fig. 4 by the flow arrows.
The surface 70 of the valve plate 58 is pressed by the pressure spring 60 against the mouth opening 24 of the tube section 22 so that no fresh dialysis solution can flow from the full bag. This second coupling position is also referred to as drain or discharge position.
After the used dialysis solution has flown from the peri-toneal cavity of the patient completely into the empty bag the third step of supplying fresh dialysis solution from the ~ull bag to the peritoneal cavity takes place. For this purpose, firstly the female connector piece is brought out of the second connection state of Fig. 4 into a third coupling position according to Fig. S, the pin 46 moving in accordance with Fig. 7 out of the position C into the position C'. In this third coupling position, also referred to as intermediate position, the mouth opening 24 of the inner tube 22 remains sealed by the surface 70 of the valve plate 58 so that no fresh dialysate can flow from the first tube 20. Furthermore, the main portion 28 of the tube section 22 seals in this third connection state the opening 57 of the annular sealing washer 54 and thus tne annular free space 71 so that no fluid passages exist between the first, second and third connections. Of great importance here is that the material from which the seal 54 is made is an elastomer so that a reliable liquid-ti~ht engagement exists between the main portion 28 of the tube section 22 and the annular sealing washer S~~.
To permit ~resh dialysis solution from the full bag to enter the peritoneal cavity, the female connector piece 4 is turned relatively to the male connector piece ~ so that ' ' ' ' - :' ' ' ' , . - ~
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the pin 46 moves out of the position C' in Fig. 7 to a position E in Fig. 7. As apparent from Fig. 7 the path of the guide groove 48 from the position C' up to the position E is no longer parallel to the two paths from A' to B and B' to C respectively but is incline~ downwardly thereto at an angle ~ , o~ advantageously being 5 degrees.
If there~ore the female connector piece 4 is turned out of the third coupling position of Fig. 5 the pin 46 in the guide groove 48 is subjected to a thread guiding and as a result the female connector piece 4 is screwed linear-ly and uniformly into the male connector piece 6 until the pin 46 has reached the position E in Fig. 7. Once the pin 46 has reached the position E in Fig. 7 a fourth coupling position or entry position according to Fig. 6 is reached.
In the uniform advance movement of the female connector piece 4 into the male connector piece 6 the valve plate 58 is first moved against the orce of the pressure spring -~
60, on the one hand the mouth opening 24 of the tube ~ ;
section 22 remaining sealed by the surface 70 of the valve plate 58 and on the other hand the outer surface of the main portion 28 of the tube section 22 remaining in liquid-~ight engagement with the opening 57 of the sealing washer 54. In the course of the further movement of the female connector piece 4 into the male connector piece 6 the valve plate 58 comes into one-sided engagement with the stop 64 in the female connector piece 4 so that on further movement of the female connector piece 4 into the male connector piece 6 said valve plate is tilted out of its horizontal position according to Figs. 1, 3, 9 and 5 with simultaneous deformation of the pressure spring 60 as illustrated ln Fig. 6. By this tilting of the valve plate 58 the mouth opening 29 of the tube section 22 is continu-ously released so that a fluid passage is freed from the first connection 18 through the tube section 22, the mouth opening 24 and through the coil of the spring 60 up to the : . . ' :, . , :
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second connection 32. Through this fluid passage ~resh dialysis solu-tion can now flow from the ful] bag into the peritoneal cavity of the patient as illustrated in Fig. 6 ~y the flow arrows.
On appropriate formation of both the surface of the valve plate 58 and the inclination angle of the last course of the guide groove 48 a linearly uniform opening of the mouth opening 24 can be achieved so that the dialysis solution flows from the full bag with continuously increas-ing flow rate and continuously increasing flow volu~e into the peritoneal cavity.
When the dialysis solution has flowed completely out of the full bag into the peritoneal cavity of the patient the previously described steps are then carried out in the reverse order, i.e. firstly the female connector piece 4 is turned relatively to the male connector piece 6 to reach the third coupling position of Fig. 5 in which the access to the peritoneal cavity is again closed by the vaIve plate 58 which seals the mouth opening 24 of the tube section 22. By appropriate turning and pulling move-ments the female connector piece 4 is then disconnected from the male connector piece 6, passing consecutively through the coupling positions according to Figs. ~ and 3 until the disconnected state according to Fig. 1 is again reached.
The open end of the female connector piece 4 is now again sprayed with a suitable disinfectant and sealed with a cap and the male connector piece 6, the full hag and the empty bag in which the used dialysis solution is disposed are disposed of as a unit.
Below, with reference to ~ig. 7 the e~act structure of the g-lide groove 48 in the gulde portion 50 will be explained:
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. . ' ' ' ', ~.P~ ~5~ 3 As already men~ioned, the gllide groove 48 ~represents a three-stage bayonet track or path so that the pin 46 during its movement in the guide groove 48 ca~ses the female connector piece 4 to execute lifting and rotary movements with respect to the male connector piece 6. For this purpose the guide groove 48 consists of the following portions:
A first lifting portion 72 is followed by a first rotary portion 74 from which a second lifting portion 76 extends which in turn merges into a second rotary portion 78 which continues into a third lifting portion 80. From said third lifting portion 80 a screw portion 82 extends which permits a combined rotary/lifting movement.
l~hereas the lifting portions 72, 76 and 80 are ali~ned substantially parallel to the connection axis, the rotary portions 74 and 78 extend substantially perpendicularly to the connection axis. On the other hand, the screw portion 82 is inclined with respect to the connection axis by the a~orementloned angle ~ .
To secure the position o~ the pin 46 at the point B, the first turning~or rotary portion 74 is provided at its -intersection with the second li~ting portion 76 advantage-ously with a detent or notch 84 in which the pin 46 can assume a secured rest position so that the first coupling position according to Fig. 3 is secured.
In similar manner the second coupling position according to position C of Fig. 4 is to be secured in that the second rotary portion 78 comprises at its intersection with the third lifting portion 80 also a formed notch 86 which secures the pin 46 in the second coupling position.~ Since in this position according to Fig. 4 the pressure spring 60 is already compressed a certain amount, the pin 46 is pressed into the second notch 76 and secured there by the spring force which tends to separate the female connector piece 4 from the male connector piece 6.
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As already mentioned, the screw portion 82 of the bayonet path is inclined an angle ~' to the connection axis of the connector 2. Due to the spring force of the pressure spring 60 the pin 46 is pressed in its final end position at E against the bayonet path and there held without further detent or notch only by frictional engagement.
Summarizing, with the connector described above a rapid and thorough flushing of the connector prior to the dialysis operation is possible using a minimum of dialysis solution and furthermore the use of roller clamps in the correspond-ing supply lines can be completely dispensed with because the opening and closing of the corresponding fluid passages is effected solely by the mo~ement of the connector itself.
Thus, increased reliability and safety, in particular in CAPD, is always ensured.
The selection of the materials for making the connector according to the in~ention is within the scope of the expert, physiologically neutral metals and/or plastics being used.
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The invention relates to a connector fvr a CAPD tube connection to a male connector piece having a central tube section which is en~aged and surrounded by a protective sleeve, and a female connector piece which comprises a valve ~eans which in the uncoupled state represents a fluid barrier, the introduction portion being introducible in liquid-tight manner into a receiving region of the protection sleeve with a seal between the protective sleeve and the female connector piece, a f~rst connection on the male connector piece for a full bag with dialysis solution, the first connection being in fluid connection with the central tube section, a second connection on the female connector piece to which a peritoneal catheter is connectable, and a connect-ing means for securing a connection position between the female and the male connector piece.
' Such a connector is described for example in German utility model 7,836,790 or EP-OS 116j986. Such a catheter lS used in continual ambulant peritoneal dialysis (CAPD) in which a catheter remains permanently in the peritoneaI cavity of a patient. Such a catheter projects through the ab-dominal wall of a patient and is connected to one part of the connector, ~he other part o~ the connector beinq con-nected via a flexible tube to a bag containing dialysis solution. In the connected state the dialysis solution can be supplied to the patient for removing metabolism products and also removed from the patient again.
Problematical in such dialysis treatment is the replacement of a bag containing used dialysis solution by a bag contain-ing fresh dialysis solution because the connector must be opened and this must take place under absolutely sterile conditions. The patient must open the connector with extreme care, the used bag being dispensed with and replaced by a fresh bag with a corresponding new sterile connector piece.
.
" :
. ' . ,, : . , ,:
~.~'7S~3 The connector of the type mentioned at the beginning already comprises a protective sleeve on the ma]e connector piece and it is not possible for the corresponding connecting faces of the connector to come into contact with the fingers.
Furthermore, in the connected state between the connector pieces a space to be filled with disinfectant is provided which is intended to eliminate any contaminations which may nevertheless arise. ~owever, this known connector can only be used by specially trained patients who carry out these measures correspondingly carefully and exactly.
With elderly or weak patients the problems in handling this connector are obvious so that further solutions of these problems were sought.
Thus, for example, EP-OS 29 526 proposes a bag system for peritoneal dialysis in which from the peritoneal catheter or from the connecting tube in Y manner a further tube branches which is connected to a further bag. Al~ flexible tube portions can be closed by clips or clamps so that specific fluid passages may be opened or closed. Thus, dialysis solution can be conveyed from the full bag through the connector into the peritoneal cavity, from the full bag through the connector into the empty bag and from the peritoneal cavity into the empty bag.
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This known system with Y-shaped branching has however the disadvantage that simple plug members are used for a connector which are not secured against contamination; in addition, the Y-shaped branching is one of the flexible tube sections so that solution residues which may be con-taminated or a risk to the patient due to toxicity (dis-infectant) can reach the peritoneal cavity of the patient.
There is also a dan~er that particles which might be generated when the male connector piece is opened can also reach the body of the patient.
. -3-: :, . . , . . ~, .' . ' .' '. ' .", , ' , : : , . ~:' . ' :
.:
.
~75~3 01 AS a result, ~or a thorough flushing or rinsing of the male 02 connector piece or the entire connector ~irstly careful 03 handling of the roller clamps is necessary to enable the 04 flushing operation to ~e carried out properly without any 05 danger to the patient and secondly a considerable amount of 06 water is wasted for pure flushing purposes.
08 Further connectors for medical purposes, although not for use 09 in CAPD, are known ~rom EP-OS 135 140 and 80 379. These connectors are effectively concerned only with a reliable 11 closure of a connector piece in the unconnected state but not 12 with complete sterility on connection.
14 The problem underlying the present invention is therefore to provide a connector for a dual-bag system for continual 16 ambulant peritoneal dialysis which obviates the aforementioned 17 disadvantages, i.e. in which troublesome roller clamps 18 complicated to handle are dispensed with and a rapid and 19 reliable flushing of the connector with a minimum of dialysis solution is possible.
22 This problem is solved in that on the male connector piece in 23 the region of the first connection on the protective sleeve a 24 third connection is disposed for an empty bag for used dialysis solution and that the valve means in dependence upon the 26 connection position of the female connector piece relatively to 27 the male connector piece and in cooperation with the central 28 tube section of the male connector piece free or interrupt 29 ~luid passages between the first, second and third connections.
31 In accordance with an embodiment of the invention the fluid 32 passages between the full bag, peritoneum and empty bag are 33 ~reed and interrupted in accordance with the particular 34 requirements in dependence upon the connection state of the male connector piece relatively to the female connector piece 36 the connection for the empty bag being disposed on the female 37 _ ~ _ , .:, . ' .
01 connector in the region oE the connection Eor the full bag so 02 that on the one hand roller clamps can be dispensed with, 03 because the fluid passages are freed or interrupted solely by 04 corresponding manipulations of the connector, and on the other 05 hand by dispensing with a Y piece between the female connector 06 and the peritoneal catheter only the connector itself and not U7 the associated Elexible tubing need be flushed so that the 0~ flushing operation itself can be carried out in relatively 09 short time with small expenditure of dialysis solution.
11 DE-OS 2,853,635 and US-PS 4,346,793 disclose connectors for 12 CAPD of the type mentioned at the beginning which each comprise 13 a male and female connector piece which are each connected to 14 flexible tubing. Since these connectors in the coupled state free t~e flow connection between the peritoneal cavity and the 16 bag, the tubing must always appropriately be shut off by a 17 clamp to prevent unintentional exit or entry of the dialysis 18 solution from the bag or into the bag. Furthermore, the 19 connector itself cannot be completely cleaned from residual disinfectant and consequently there is a danger that residual 21 disinfectant can reach the peritoneal cavity of the patient 22 during the filling with fresh dialysis solution.
24 More particularly, an embodiment of the invention is a continual ambulant peritoneal dialysis tube connection device 26 comprising a male connector piece having a central tu~e section 27 joined to and surrounded by a protective sleeve, a receiving 28 region between the central tube and the protective sleeve, a 29 first connection apparatus for connecting a first dialysis 3~ solution bag, and a third connection apparatus for connecting a 31 second dialysis solution bag. The connection device also 32 includes a female connector piece having a valve apparatus, an 33 introduction portionr a second connection apparatus for 34 connecting a peritoneal catheter, and an annular seal. The valve apparatus has a valve plate for providing a fluid barrier ~j, , , ,~
, .
'S~f ~3 01 in its uncoupled state prohibiting the flow of fluids through 02 its elongated axial ~irection. The introduction portion forms 03 a liquid-tight seal between the protective sleeve on the male 04 connector piece and the female connector piece after being 05 inserted into the receiving region. The first connection 06 apparatus is in fluid communication with the central tube 07 section. The valve apparatus cooperates with the central tube 08 section and the inserted position of the female connector 09 within the protective sleeve providing for selective fluid communication between any two of the first connection 11 apparatus, the second connection apparatus, and the third 12 connection apparatus. The central tube section has a mouth 13 opening forming a fluid-tight seal with the valve plate when 14 the mouth opening contacts the valve plate. As a result the male connector piece in a first coupling position with the 16 female connector piece in fluid-tight manner with the annular 17 seal effects a first fluid passage from the first connection 18 apparatus to the third connection apparatus, and whereby in a 19 second coupling position by the central tube section of the male connector piece interacting with the valve apparatus 21 within the female connector piece opens the valve. The mouth 22 opening of the central section has a fluid-tight sealing manner 23 on the valve plate. The front portion passing through an 24 opening of the annular seal effects a second fluid passage from the second connection apparatus to the third connection 26 apparatus. When in the third coupling position the main 27 portion of the central tube section of the male connector piece 28 forms a fluid-tight seal with the annular seal of the female 29 connector piece and the valve plate is tilted from the mouth opening of the central tube section forming a third fluid 31 passage from the first connection apparatus to the second 32 connection apparatus. Each of the coupling positions are 33 predetermined and lockable by a connection apparatus.
Further details, features and advantages of the present 36 invention will be apparent from the following description of an 37 example of e~bodiment with the aid of the drawings, wherein:
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- . . . . .
5~.3 Fig. l is a sec-tional view of a connector accordiny to -the invention comprising a male connector piece and a female connector piece, the two connector pieces being shown in the unconnected state;
Fig. 2 is a plan view from below of the male connector piece;
Fig. 3 shows in sectional view the position of the male connector piece with respect to the female connec-tor piece in a first connection state;
Fig. 4 shows-the position o~ the male connector piece with respect to the female connector piece in a second connection state;
Fig. 5 shows the position of the male connector piece to the female connector piece in a third connection state;
Fig. 6 shows the position of the male ~onnector piece to the female connector piece in a fourth connection state; and Fig. 7 shows a guide groove on the female connector piece in a developed representation.
In accordance with Fig. l a connector 2 comprises a female connector piece 4 and a male connector piece 6. The female connector piece 4 comprises a connector unit 8 which is mounted in a~first sleeve lO!behind an introduction portion 12.
Female connector piece 6 comprises a receiving region 14 for receiving the male connector piece 4~ Furthermore, the male connector piece 6 cornprises at its end opposite the receiving region 14 a first connection 18 for a flex-ible tube 20, the tube 20 establishlng the connection line ~ 'v ~ --6--. -- - ~ . . . ..
.
' , : . . - ' ' ' ' ~- ' , 7~ .3 between a full bag with fresh dialysis solution not illustrated in the drawings and the male connector piece 6. The securing of the tube 20 to the first connection 18 may for example be by adhering or the like. As apparent from the drawings, the connection 18 extends through the sleeve 21 and merges in the direction towards the receiv-ing region 14 into a central tube section 22 which is arranged coaxially with the sleeve 21 in the male connector piece 6 and comprises in its front portion 30 a mouth 'openiny 24.
As further apparent from the drawings,'the external dia-meter of the tube section 22 is not constant considered over its entire length; on the contrary, the tube section 22 comprises a main portion 28 which at a step 26 merges into a front portion 30 whose external diameter is less than that of the main portion 28. Both portions have an axial length significant for the respective connection phases.
The female connector piece 4 comprises at its end opposite the introduction portion 12 a second connection 32 for a second flexibl~ tube 34 which leads to a peritoneal catheter not illustrated in the drawings. The securing of the second tube 34 to the second connection 32 is for example by a clamp connection between the second connection 32 and the sleeve 10, by shrinking the tube 34 onto the second connection 32, by adhering, or the like.
The male connector piece 6 comprises a third connection 36 originating from the sleeve 21 for a third flexible tube 38 which establishes a connection b'etween the male connector piece 6 and an empty bag for used dialysis solution. This third connection 36 is advantageously disposed in the vicinity of the first connection 18.
The receiving region 14 of the ~ale connector piece is ~ .
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. : . : . . ~ . - :
~.~75~3 open by an opening 40 in the direction towards the female connector pi.ece 4 to be introduced. Furthermore, -the sleeve 21 of the male connector piece 6 comprises two regions of different internal diameters, a first sleeve region having an internal diameter which is grea-ter than the external diameter of the introduction portion 12 of the sleeve 10 of the female connector piece, and a second sleeve region 44 which adjoins the first sleeve region 42 and has an internal diameter which is at least approxi-mately equal to, preferably somewhat greater than, the external diameter of the introduction portion 12 of the female connector piece 6.
In the region of the opening 40 of the male connector piece 6 at least one and in the embodiment illustrated two pins 46 project radially inwardly from the first sleeve region 42. The radial extent of the pins 46 inwardly and their external ~iameter are dimensioned so that a form locking engagement is possible with a guide groove 48 which is provided in a guide portion of the first sleeve 10 as will be explained in detail hereinafter with reference. to Figs. 3 to 7.
In the interior of the female connector piece 4 a valve means 52 is disposed. This valve means 52 comprises essentially an annular seal 54 made of suitable elasto-meric material and held in an annular recess 56 in the .inner wall of the introduction portion 12 of the first sleeve 10. The retaining of the seal 54 in the recess 56 is by adhering, force fit, a~spring ring or the like.
.
The diameter of the opening 57 of the seal 54 is at least approximately equal to, preferably somewhat less than, an external diameter D of the main portion 28 of the tube section 22 in the male connector piece 6. On the other hand, the diameter of the opening 57 is greater than the external diameter E of the front portion 30 of the tube section 22.
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Furt~ermore, the valve means 52 in the connector piece 4 comprises a valve plate 58 whlch by a suitable spring means, for example by a spiral pressure spring 60, is held in liquid-tight engagement with the annular sealing washer 54. The valve plate 58 is disposed between the seal 54 and the second connection 32 in the female connector piece 4.
The pressure spring 60 bears with its one end on a suitable spring seat 62 and a suitable configuration of the contour of the valve plate 58 facing the spring permits a form-locking engagement between the valve plate 58 and the pressure spring 60. In the region between the valve plate 58 and the spring seat 62 on the inner contour of the female connector piece 6 a stop 64 is provided in the form of a projecting region.
In the outer end region of the introduction portion 12 of the female connector piece 4, preferably adjacent the introduction opening 65, an annular sealing element is disposed, for example an O ring 66 which is advantageously let into an annular groove which is disposed on the outer surface of the female connector piece 4.
Hereinafter the mode of operation of the present connector will be described, in particular with reference to Figs.
1 and 3 to 7:
In the state according to Fig. 1, i.e. in the unconnected state, both the female connector piece 4 and the male connector piece 6 are sealed with a cap, not illustrated in the drawings, the inner spaces sealed by the cap possibly being sterilized with a suitable disinfectant. To estab-lish a first connection state in accordance with Fig. 3 firstly the two caps are removed and the female connector piece4 is aligned with the male connector piece 6 in such _g_ ., , . . . :
~.~75i'~3 a manner that the pin or pins 46 on the female connector piece 6 are in alignment with an entry portion 68 of the guide groove 48 on the guide portion 50 of the female connector piece 4.
The position of the pin 46 with respect to the guide groove 48 or to the entry 68 is designated in Fig. 7 by A. Fig.
7 shows the guide groove 48 in the developed illustration and it is seen that this is a three-stage bayonet path.
If now the female connector piece 4 is pushed into the male connector piece 6 the pin 46 in the guide groove ~8 first reaches a first coupling position which is marked in Fig. 7 by A'. In this coupling position the female connector piece 4 in the male connector piece 6 reaches a coupling position as shown in Fig. 3 in which the O ring engages sealingly on the inner peripheral surface of the second sleeve region 44 of the male connector piece 6. By relative rotation of the female connector piece 4 with respect to the male connector piece 6 the pin 46 follows the guide groove ~8 and reaches a first locking position which is marked in Fig. 7 by B and in which the first coupling position is secured. In this first coupling position, which i~ shown in Fig. 3 and referred to herein-after as ~lushing position, the ~alve plate 58 o~ the valve means S2 due to the pressure load by the spring 60 remains in liquid-tight engagement with the sealing washer 5~ so that only a fluid passage from the first connection 1~ through the central tube section 22 to the third connection 36 is possible. In this flushing position the full bag with the fresh dialysis solution is now opened, for example by breaking a breakage cone, and fresh dialysis solution flows through the first tube 20, the central tube section 2Z and the third tube 38 into the empty bag. The entering fresh dialysis solution removes both the disinfectant which is disposed in these regions of the male and female connector pieces and particles which can form on opening the breakage cone, and flushes them into the empty bag.
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After the flushing of the connector as second step in the peritoneal dialysis the used dialysis solution is drained from the peritoneal cavity of the patient into the empty bag.
For this purpose the female connector piece 4 is further introduced into the male connector piece 6, the pin 46 in the guide groove 48 reaching~a second position designated in Fig. 7 by B'. A turning of the female connector piece 4 relatively to the male connector piece 6 brings the pin ~6 into a position which is designated in Fig. 7 by C and which corresponds to the coupling position of Fig.
4, in which the second coupling position is secured.
An insertion of the female connector piece 4 into the male connector piece 6 first effects that the mouth opening 24 of the tube section 22 comes into engagement with a surface 70 of the valve plate 58 so that the supply of fresh dialysis solution from the~full bag through the first flexible tube 20 is interrupted. A further move-ment of the female connector piece 4 into the male connector piece 6 (the pin 46 moving into the position B' of Fig. 7) leads finally to the second coupling position of Fig. 9.
Once this second coupling position is reached the female connector piece is turned so that the pin 46 assumes in the guide groove 48 the position C in Fig. 7 in which said second coupling position is locked.
, As apparent from Fig. 4, in said second couplin~ position the valve plate 58 is moved against the spring force of the pressure spring 60 by the central tube section 22 out of engagement with the sealing washer 54 so that a fluid passage becomes free from the second connection 32 of the emale connector piece past the valve plate 58 and through the annular free space 71 formed between the opening 57 of the annular sealing washer 54 and the outer surface of . . , . ` ' ' ~ ', '- ' .. - . : . . .
'' " ' '' . .',' ' 7~ 3 the fron~ portion 30 of the central tu~e section 22 to the third connection 36. The used dlalysis liquid flows through this fluid passage from the peritoneal cavity o~
the patient into the empty bag as indicated in Fig. 4 by the flow arrows.
The surface 70 of the valve plate 58 is pressed by the pressure spring 60 against the mouth opening 24 of the tube section 22 so that no fresh dialysis solution can flow from the full bag. This second coupling position is also referred to as drain or discharge position.
After the used dialysis solution has flown from the peri-toneal cavity of the patient completely into the empty bag the third step of supplying fresh dialysis solution from the ~ull bag to the peritoneal cavity takes place. For this purpose, firstly the female connector piece is brought out of the second connection state of Fig. 4 into a third coupling position according to Fig. S, the pin 46 moving in accordance with Fig. 7 out of the position C into the position C'. In this third coupling position, also referred to as intermediate position, the mouth opening 24 of the inner tube 22 remains sealed by the surface 70 of the valve plate 58 so that no fresh dialysate can flow from the first tube 20. Furthermore, the main portion 28 of the tube section 22 seals in this third connection state the opening 57 of the annular sealing washer 54 and thus tne annular free space 71 so that no fluid passages exist between the first, second and third connections. Of great importance here is that the material from which the seal 54 is made is an elastomer so that a reliable liquid-ti~ht engagement exists between the main portion 28 of the tube section 22 and the annular sealing washer S~~.
To permit ~resh dialysis solution from the full bag to enter the peritoneal cavity, the female connector piece 4 is turned relatively to the male connector piece ~ so that ' ' ' ' - :' ' ' ' , . - ~
: ' ' ' .. ' :
the pin 46 moves out of the position C' in Fig. 7 to a position E in Fig. 7. As apparent from Fig. 7 the path of the guide groove 48 from the position C' up to the position E is no longer parallel to the two paths from A' to B and B' to C respectively but is incline~ downwardly thereto at an angle ~ , o~ advantageously being 5 degrees.
If there~ore the female connector piece 4 is turned out of the third coupling position of Fig. 5 the pin 46 in the guide groove 48 is subjected to a thread guiding and as a result the female connector piece 4 is screwed linear-ly and uniformly into the male connector piece 6 until the pin 46 has reached the position E in Fig. 7. Once the pin 46 has reached the position E in Fig. 7 a fourth coupling position or entry position according to Fig. 6 is reached.
In the uniform advance movement of the female connector piece 4 into the male connector piece 6 the valve plate 58 is first moved against the orce of the pressure spring -~
60, on the one hand the mouth opening 24 of the tube ~ ;
section 22 remaining sealed by the surface 70 of the valve plate 58 and on the other hand the outer surface of the main portion 28 of the tube section 22 remaining in liquid-~ight engagement with the opening 57 of the sealing washer 54. In the course of the further movement of the female connector piece 4 into the male connector piece 6 the valve plate 58 comes into one-sided engagement with the stop 64 in the female connector piece 4 so that on further movement of the female connector piece 4 into the male connector piece 6 said valve plate is tilted out of its horizontal position according to Figs. 1, 3, 9 and 5 with simultaneous deformation of the pressure spring 60 as illustrated ln Fig. 6. By this tilting of the valve plate 58 the mouth opening 29 of the tube section 22 is continu-ously released so that a fluid passage is freed from the first connection 18 through the tube section 22, the mouth opening 24 and through the coil of the spring 60 up to the : . . ' :, . , :
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second connection 32. Through this fluid passage ~resh dialysis solu-tion can now flow from the ful] bag into the peritoneal cavity of the patient as illustrated in Fig. 6 ~y the flow arrows.
On appropriate formation of both the surface of the valve plate 58 and the inclination angle of the last course of the guide groove 48 a linearly uniform opening of the mouth opening 24 can be achieved so that the dialysis solution flows from the full bag with continuously increas-ing flow rate and continuously increasing flow volu~e into the peritoneal cavity.
When the dialysis solution has flowed completely out of the full bag into the peritoneal cavity of the patient the previously described steps are then carried out in the reverse order, i.e. firstly the female connector piece 4 is turned relatively to the male connector piece 6 to reach the third coupling position of Fig. 5 in which the access to the peritoneal cavity is again closed by the vaIve plate 58 which seals the mouth opening 24 of the tube section 22. By appropriate turning and pulling move-ments the female connector piece 4 is then disconnected from the male connector piece 6, passing consecutively through the coupling positions according to Figs. ~ and 3 until the disconnected state according to Fig. 1 is again reached.
The open end of the female connector piece 4 is now again sprayed with a suitable disinfectant and sealed with a cap and the male connector piece 6, the full hag and the empty bag in which the used dialysis solution is disposed are disposed of as a unit.
Below, with reference to ~ig. 7 the e~act structure of the g-lide groove 48 in the gulde portion 50 will be explained:
.. .. . . . .
' ' ' ' , ' ' ' , ' , . ~ . ' -' - ' :
. - , ' ,~ ~ :` . ,, ' ' ' .
. . ' ' ' ', ~.P~ ~5~ 3 As already men~ioned, the gllide groove 48 ~represents a three-stage bayonet track or path so that the pin 46 during its movement in the guide groove 48 ca~ses the female connector piece 4 to execute lifting and rotary movements with respect to the male connector piece 6. For this purpose the guide groove 48 consists of the following portions:
A first lifting portion 72 is followed by a first rotary portion 74 from which a second lifting portion 76 extends which in turn merges into a second rotary portion 78 which continues into a third lifting portion 80. From said third lifting portion 80 a screw portion 82 extends which permits a combined rotary/lifting movement.
l~hereas the lifting portions 72, 76 and 80 are ali~ned substantially parallel to the connection axis, the rotary portions 74 and 78 extend substantially perpendicularly to the connection axis. On the other hand, the screw portion 82 is inclined with respect to the connection axis by the a~orementloned angle ~ .
To secure the position o~ the pin 46 at the point B, the first turning~or rotary portion 74 is provided at its -intersection with the second li~ting portion 76 advantage-ously with a detent or notch 84 in which the pin 46 can assume a secured rest position so that the first coupling position according to Fig. 3 is secured.
In similar manner the second coupling position according to position C of Fig. 4 is to be secured in that the second rotary portion 78 comprises at its intersection with the third lifting portion 80 also a formed notch 86 which secures the pin 46 in the second coupling position.~ Since in this position according to Fig. 4 the pressure spring 60 is already compressed a certain amount, the pin 46 is pressed into the second notch 76 and secured there by the spring force which tends to separate the female connector piece 4 from the male connector piece 6.
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5~
As already mentioned, the screw portion 82 of the bayonet path is inclined an angle ~' to the connection axis of the connector 2. Due to the spring force of the pressure spring 60 the pin 46 is pressed in its final end position at E against the bayonet path and there held without further detent or notch only by frictional engagement.
Summarizing, with the connector described above a rapid and thorough flushing of the connector prior to the dialysis operation is possible using a minimum of dialysis solution and furthermore the use of roller clamps in the correspond-ing supply lines can be completely dispensed with because the opening and closing of the corresponding fluid passages is effected solely by the mo~ement of the connector itself.
Thus, increased reliability and safety, in particular in CAPD, is always ensured.
The selection of the materials for making the connector according to the in~ention is within the scope of the expert, physiologically neutral metals and/or plastics being used.
, ., . ~ .
Claims (13)
1. A continual ambulant peritoneal dialysis tube connection device comprising:
a male connector piece having a central tube section joined to and surrounded by a protective sleeve, a receiving region between said central tube and protective sleeve, a first connection means for connecting a first dialysis solution bag, and a third connection means for connecting a second dialysis solution bag;
a female connector piece having a valve means, an introduction portion, a second connection means for connecting a peritoneal catheter, and an annular seal said valve means having a valve plate for providing a fluid barrier in its uncoupled state prohibiting the flow of fluids through its elongated axial direction;
said introduction portion forming a liquid-tight seal between said protective sleeve on said male connector piece and said female connector piece after being inserted into said receiving region;
said first connection means being in fluid communication with said central tube section;
said valve means cooperating with said central tube section and the inserted position of said female connector Within said protective sleeve providing for selective fluid communication between any two of said first connection means, said second connection means, and said third connection means said central tube section having a mouth opening forming a fluid-tight seal with said valve plate when said mouth opening contacts said valve plate, whereby said male connector piece in a first coupling position with said female connector piece in fluid-tight manner with said annular seal effects a first fluid passage from said first connection means to said third connection means, when in a second coupling position by said central tube section of said male connector piece interacting with said valve means within said female connector piece opens said valve, said mouth opening of said central section having a fluid-tight sealing manner on said valve plate and said front portion passing through an opening of said annular seal to effect a second fluid passage from said second connection means to said third connection means, and when in a third coupling position said main portion of said central tube section of said male connector piece forming a fluid-tight seal with said annular seal of said female connector piece and said valve plate being tilted from said mouth opening of said central tube section forming a third fluid passage from said first connection means to said second connection means, each of the coupling positions are predetermined and lockable by a connecting means.
a male connector piece having a central tube section joined to and surrounded by a protective sleeve, a receiving region between said central tube and protective sleeve, a first connection means for connecting a first dialysis solution bag, and a third connection means for connecting a second dialysis solution bag;
a female connector piece having a valve means, an introduction portion, a second connection means for connecting a peritoneal catheter, and an annular seal said valve means having a valve plate for providing a fluid barrier in its uncoupled state prohibiting the flow of fluids through its elongated axial direction;
said introduction portion forming a liquid-tight seal between said protective sleeve on said male connector piece and said female connector piece after being inserted into said receiving region;
said first connection means being in fluid communication with said central tube section;
said valve means cooperating with said central tube section and the inserted position of said female connector Within said protective sleeve providing for selective fluid communication between any two of said first connection means, said second connection means, and said third connection means said central tube section having a mouth opening forming a fluid-tight seal with said valve plate when said mouth opening contacts said valve plate, whereby said male connector piece in a first coupling position with said female connector piece in fluid-tight manner with said annular seal effects a first fluid passage from said first connection means to said third connection means, when in a second coupling position by said central tube section of said male connector piece interacting with said valve means within said female connector piece opens said valve, said mouth opening of said central section having a fluid-tight sealing manner on said valve plate and said front portion passing through an opening of said annular seal to effect a second fluid passage from said second connection means to said third connection means, and when in a third coupling position said main portion of said central tube section of said male connector piece forming a fluid-tight seal with said annular seal of said female connector piece and said valve plate being tilted from said mouth opening of said central tube section forming a third fluid passage from said first connection means to said second connection means, each of the coupling positions are predetermined and lockable by a connecting means.
2. The connection device of claim 1 further comprising:
a connecting means for securely positioning said female connector piece within said male connector piece.
a connecting means for securely positioning said female connector piece within said male connector piece.
3. The connection device of claim 2 wherein said connecting means further comprises:
at least one pin on said male connector piece; and said female connector piece having a guide groove receiving said pin.
at least one pin on said male connector piece; and said female connector piece having a guide groove receiving said pin.
4. The connection device of claim 3 further comprising:
said guide groove extending in stepped manner along the peripheral direction of a sleeve on said female connector piece.
said guide groove extending in stepped manner along the peripheral direction of a sleeve on said female connector piece.
5. The connection device of claim 4 wherein said guide groove further comprises:
a first lifting portion;
a second lifting portion;
a first rotary portion and a second rotary portion;
said first rotary portion connecting to said first lifting portion and second lifting portion;
a third lifting portion;
said second rotary portion connecting to said second lifting portion and said third lifting portion; and a screw portion extending from said third lifting portion.
a first lifting portion;
a second lifting portion;
a first rotary portion and a second rotary portion;
said first rotary portion connecting to said first lifting portion and second lifting portion;
a third lifting portion;
said second rotary portion connecting to said second lifting portion and said third lifting portion; and a screw portion extending from said third lifting portion.
6. The connection device of claim 5 wherein said guide groove further comprises:
said screw portion inclined to a center axis of said connection device.
said screw portion inclined to a center axis of said connection device.
7. The connection device of claim 1 wherein said valve means further comprises:
a biasing means resulting in fluid-tight connection between said valve plate and said annular seal.
a biasing means resulting in fluid-tight connection between said valve plate and said annular seal.
8. The connection device of claim 7 wherein said valve plate and said annular seal further comprise an elastomeric material.
9. The connection device of claim 7 further comprising:
said valve plate being biased by a pressure spring towards said annular seal.
said valve plate being biased by a pressure spring towards said annular seal.
10. The connection device of claim 9 further comprising:
a stop causing said valve plate to tilt when said central tube section causes said valve plate to contact said stop.
a stop causing said valve plate to tilt when said central tube section causes said valve plate to contact said stop.
11. The connection device of claim 1 wherein said female connector piece further comprises:
an annular sealing member adjacent said introduction portion.
an annular sealing member adjacent said introduction portion.
12. The connection device of claim 11 wherein said sealing member further comprises an O ring.
13. The connection device of claim 1 wherein said central tube section further comprises:
a front portion having a first external diameter;
a main portion having a second external diameter greater than said first external diameter;
said annular seal positioned within said female connector having an internal diameter;
said second external diameter being at least equal to said internal diameter; and said first external diameter being less than said internal diameter.
a front portion having a first external diameter;
a main portion having a second external diameter greater than said first external diameter;
said annular seal positioned within said female connector having an internal diameter;
said second external diameter being at least equal to said internal diameter; and said first external diameter being less than said internal diameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853513205 DE3513205C1 (en) | 1985-04-12 | 1985-04-12 | Connector for peritoneal dialysis |
| DEP3513205 | 1985-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1275213C true CA1275213C (en) | 1990-10-16 |
Family
ID=6267879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 506509 Expired - Lifetime CA1275213C (en) | 1985-04-12 | 1986-04-11 | Connector for peritoneal dialysis |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4745950A (en) |
| EP (1) | EP0198407B1 (en) |
| JP (1) | JPH0651061B2 (en) |
| AT (1) | ATE65415T1 (en) |
| AU (1) | AU588030B2 (en) |
| BR (1) | BR8601680A (en) |
| CA (1) | CA1275213C (en) |
| DE (2) | DE3513205C1 (en) |
| DK (1) | DK167798B1 (en) |
| ES (1) | ES8703280A1 (en) |
| FI (1) | FI861516A (en) |
| YU (1) | YU45316B (en) |
Families Citing this family (114)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH672363A5 (en) * | 1986-09-29 | 1989-11-15 | Contempo Products | |
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| US4019512A (en) * | 1975-12-04 | 1977-04-26 | Tenczar Francis J | Adhesively activated sterile connector |
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-
1985
- 1985-04-12 DE DE19853513205 patent/DE3513205C1/en not_active Expired
-
1986
- 1986-04-09 AU AU55781/86A patent/AU588030B2/en not_active Ceased
- 1986-04-09 DE DE8686104834T patent/DE3680369D1/en not_active Expired - Lifetime
- 1986-04-09 AT AT86104834T patent/ATE65415T1/en not_active IP Right Cessation
- 1986-04-09 FI FI861516A patent/FI861516A/en not_active Application Discontinuation
- 1986-04-09 EP EP86104834A patent/EP0198407B1/en not_active Expired - Lifetime
- 1986-04-11 CA CA 506509 patent/CA1275213C/en not_active Expired - Lifetime
- 1986-04-11 DK DK164586A patent/DK167798B1/en not_active IP Right Cessation
- 1986-04-11 US US06/850,854 patent/US4745950A/en not_active Expired - Fee Related
- 1986-04-11 ES ES553925A patent/ES8703280A1/en not_active Expired
- 1986-04-11 JP JP8402486A patent/JPH0651061B2/en not_active Expired - Lifetime
- 1986-04-14 BR BR8601680A patent/BR8601680A/en not_active IP Right Cessation
- 1986-04-14 YU YU59386A patent/YU45316B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK164586D0 (en) | 1986-04-11 |
| FI861516A0 (en) | 1986-04-09 |
| DE3680369D1 (en) | 1991-08-29 |
| BR8601680A (en) | 1986-12-16 |
| EP0198407A3 (en) | 1988-06-08 |
| JPS61288866A (en) | 1986-12-19 |
| EP0198407B1 (en) | 1991-07-24 |
| DK167798B1 (en) | 1993-12-20 |
| YU45316B (en) | 1992-05-28 |
| ES553925A0 (en) | 1987-02-16 |
| ATE65415T1 (en) | 1991-08-15 |
| ES8703280A1 (en) | 1987-02-16 |
| EP0198407A2 (en) | 1986-10-22 |
| US4745950A (en) | 1988-05-24 |
| DE3513205C1 (en) | 1987-01-15 |
| FI861516A (en) | 1986-10-13 |
| YU59386A (en) | 1988-10-31 |
| AU588030B2 (en) | 1989-09-07 |
| JPH0651061B2 (en) | 1994-07-06 |
| DK164586A (en) | 1986-10-13 |
| AU5578186A (en) | 1986-10-16 |
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Legal Events
| Date | Code | Title | Description |
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| MKLA | Lapsed |