US20050215980A1 - Drainage catheter - Google Patents
Drainage catheter Download PDFInfo
- Publication number
- US20050215980A1 US20050215980A1 US11/102,580 US10258005A US2005215980A1 US 20050215980 A1 US20050215980 A1 US 20050215980A1 US 10258005 A US10258005 A US 10258005A US 2005215980 A1 US2005215980 A1 US 2005215980A1
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- United States
- Prior art keywords
- tension
- arms
- thread
- dilating
- elongate member
- 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.)
- Abandoned
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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
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
- A61M27/002—Implant devices for drainage of body fluids from one part of the body to another
-
- 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
- A61M25/00—Catheters; Hollow probes
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M25/04—Holding devices, e.g. on the body in the body, e.g. expansible
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09125—Device for locking a guide wire in a fixed position with respect to the catheter or the human body
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/107—Balloon catheters with special features or adapted for special applications having a longitudinal slit in the balloon
Definitions
- the invention relates to medical catheters, and, more particularly, to drainage catheters with distal anchoring mechanisms.
- Some medical treatments involve the use of a medical catheter with a distal anchor that retains the catheter in position in the body of a patient.
- Some treatments use a drainage catheter.
- procedures for the suprapubic catheterization of the bladder drain the bladder after surgery or when an obstruction plugs the genitourinary system.
- Percutaneously inserted catheters can also drain the kidneys, biliary system, abscesses, other sites of fluid collection and other viscera.
- percutaneously inserted catheters can introduce substances into the patient's body such a fluids introduced through gastrostomy feeding tubes.
- a Foley bladder catheter includes an inflatable balloon at the distal end, an inflation channel in the walls of the catheter, an external supply of inflation fluid connected to the channel and a valve to keep the fluid in place and the balloon inflated.
- the distal end of the catheter can include a “pigtail loop” formed from a flexible tube.
- the pigtail loop is preformed from a shape-memory material.
- a physician inserts a stiff cannula or stylet into the catheter lumen to straighten the pigtail loop.
- the distal end of the flexible tube returns to the pigtail configuration after the physician removes the cannula.
- return to the pigtail configuration may be aided or secured by the use of a suture thread that extends through draw ports at two spaced positions on the flexible tube. These draw ports move toward each other when the physician removes the cannula.
- the physician can then take up slack and secure the pigtail by applying tension to the suture thread.
- the physician can reverse the above procedures.
- Other anchor mechanisms include malecots with “wings” or “arms” in a distal portion of the catheter wall.
- the application of force to a distal tip of the catheter can expand the wings, and the wings extend outward protruding radially to create an anchor for the catheter.
- the force can be applied by pulling on a suture string or a rod extending through the lumen of the catheter.
- the wings of the malecot can be formed from a shape-memory material with a naturally protruding configuration, and a stylet is used to push the distal end of the catheter and collapse the malecot.
- a catheter according to the invention does not require the use of a shape-memory material, a stylet, or dual tubes for collapsing an anchor mechanism. Also, catheters according to the invention do not require a physician to manipulate separately two different tension members (e.g., two sutures) extending through the catheter lumen.
- a catheter of the present invention includes one or more tension members to pull on one or more arms of a dilating member to collapse the dilating member.
- the tension members in cooperation with a lock member, can secure the dilating member in a collapsed state.
- a single tension control member located, for example, at the proximal end of the catheter), and operable with one hand, can simultaneously produce opposite changes in tension in two tension members attached to a dilating member.
- catheters according to the invention do not require stylets.
- a physician can collapse and secure the dilating member, for insertion or removal of the catheter, by applying tension (e.g., a pulling force) to a tension member.
- catheters of the invention can include a tension control member that cooperatively controls the tension in two separate tension members to permit a physician securely and controllably to expand and collapse the dilating member with the use of just one hand.
- the invention features a medical device for draining fluid from the body of a patient.
- the device comprises an elongate member that defines a lumen and includes a proximal end and a distal portion.
- the device further comprises a dilating member disposed in the distal portion of the elongate member.
- the dilating member comprises a plurality of arms movable from a collapsed state to an expanded state in which the arms protrude radially to anchor the device within the body of the patient.
- the device further comprises a tension member extending through the lumen to the dilating member and coupled to the plurality of arms such that the application of tension to the tension member causes the arms to move to the collapsed state thereby permitting insertion and removal of the device into and from the body of the patient.
- Embodiments of this aspect of the invention can include the following features.
- the device can include a second tension member extending through the lumen to the dilating member.
- the second tension member couples to a distal end of at least one of the arms such that application of tension to the second tension member causes the arms to move to the expanded state.
- the device can further include a tension control member disposed at the proximal end of the elongate member, movable in at least a first direction and a second direction.
- the tension control member is coupled to the tension members such that movement of the tension control member in the first direction causes an increase in tension of the tension member and a decrease in tension of the second tension member that causes the arms to move to the collapsed state. Movement of the tension control member in the second direction causes an increase in tension of the second tension member and a decrease in tension of the tension member that causes the arms to move to the expanded state.
- the tension members comprise a flexible material.
- the tension control member is slidably coupled to the elongate member to permit movement in proximal and distal directions.
- the tension control member is rotatably coupled to the elongate member to permit clockwise and counterclockwise rotational movement around a longitudinal axis of the elongate member.
- the tension control member is lockable to fix the tensions in the tension members to secure the arms when in the collapsed state, and when in the expanded state.
- the invention features a device with a tension control member that cooperatively adjusts the tension in at least two tension members.
- the device comprises an elongate member that defines a lumen and includes a proximal end and a distal portion.
- a tension control member is disposed at the proximal end of the elongate member and movable in at least a first direction and a second direction.
- a first tension member couples to the tension control member at a first site and extends through the lumen to the distal portion.
- a second tension member couples to the tension control member at a second site and extends through the lumen to the distal portion.
- Movement of the tension control member in the first direction causes an increase in tension of the first tension member and a decrease in tension of the second tension member. Conversely, movement of the tension control member in the second direction causes an increase in tension of the second tension member and a decrease in tension of the first tension member.
- Embodiments of this aspect of the invention can include the following features.
- the first and second tension members can comprise a flexible material.
- the tension control member can be slidably coupled to the elongate member to permit movement in proximal and distal directions.
- the tension control member is rotatably coupled to the elongate member to permit clockwise and counterclockwise rotational movement around a longitudinal axis of the elongate member.
- FIG. 1 a is a three-dimensional view of the distal portion of an embodiment of a drainage catheter according to the invention.
- FIG. 1 b is a three-dimensional view of the distal portion of an embodiment of a drainage catheter according to the invention.
- FIG. 2 is an enlarged view of the arm “A” of FIG. 1 a.
- FIG. 3 a - c are three-dimensional views of three embodiments of a dilating member arm.
- FIG. 4 is a side view of the exterior of an embodiment of a dilating member in a collapsed state.
- FIG. 5 is a cutaway interior view that corresponds to FIG. 4 .
- FIG. 6 a is a cutaway view of an embodiment of a drainage catheter according to the invention that includes two tension members a slidable tension control member.
- FIG. 6 b is a cutaway view of an embodiment of a rotatable tension control member.
- FIG. 7 a - c are cutaway views that illustrate use of an embodiment of a tension control member.
- FIG. 8 is a three-dimensional view of an embodiment of a lock member that includes a slotted portion.
- FIG. 9 a is a three-dimensional view of an embodiment of a lock member that includes a sliding portion.
- FIG. 9 b is a cross-sectional view of the embodiment of FIG. 9 a in a locked state
- FIG. 9 c is a cross-sectional view of the embodiment of FIG. 9 a in an unlocked state.
- FIG. 10 a is a three-dimensional view of an embodiment of a lock member.
- FIG. 10 b is a cross-sectional view that corresponds to FIG. 10 a.
- FIG. 11 is a three-dimensional view of an embodiment of a lock member that includes a ring portion.
- FIG. 12 is a three-dimensional view of an embodiment of a lock member that includes a sliding portion.
- FIG. 13 is a three-dimensional view of an embodiment of a lock member that includes a sliding portion.
- FIG. 14 is a three-dimensional view of an embodiment of a lock member that includes a sliding portion.
- FIG. 15 is a three-dimensional view of an embodiment of a lock member that includes a pivoting member.
- FIG. 16 is a three-dimensional view of an embodiment of a lock member that includes a folding member.
- FIG. 17 is a three-dimensional view of an embodiment of a lock member that includes a flipping member.
- a physician can use a medical device 98 according to the invention for draining fluid or removing other materials from the body of a patient (the term “physician” is here understood to refer generally to any medical worker).
- the device 98 can be employed as a catheter for multi-stage percutaneous stone removal or nephrostomy drainage.
- Other uses include, for example, insertion of the device into a patient for drainage of the bladder, the kidneys, the biliary system, abscesses, other sites of fluid collection and other viscera.
- percutaneously inserted catheters can introduce substances into the patient's body, such as fluids introduced through gastrostomy feeding tubes.
- the device 98 comprises a dilating member 100 disposed in a distal portion 350 of an elongate member 300 (see also FIG. 6 a ).
- the elongate member 300 (partially shown) defines at least one internal Itumen 390 (see FIG. 6 a ) for transporting bodily fluid, and the elongate member 300 includes a proximal end 330 (see FIG. 6 a ) and the distal portion 350 .
- the elongate member 300 further comprises a distal extension 310 adjacent to a distal end 190 of the dilating member 100 .
- Other embodiments include no extension (see FIG. 4 ).
- Use of a distal extension 310 varies with the medical application.
- the distal extension 310 can be inserted in the ureter to capture urine flow.
- the dilating portion of a catheter without an extension can reside inside a kidney to directly drain the kidney.
- the dilating member 100 comprises one or more arms 110 .
- the dilating member has four arms 110 . Flexing or extending the arms 110 respectively serves to configure the dilating member 100 in an expanded state, i.e. bent arms, or a contracted state, i.e. straight arms 110 .
- a physician can insert the distal portion 350 of the elongate member 300 and the dilating-member 100 into an orifice or incision in a patient.
- the dilating member 100 anchors the medical device 98 in the body of the patient.
- another embodiment of the dilating member 100 comprises one or more curving arms 110 that each are free at one end.
- arms 110 can be fabricated by making slits in an elongate member 300 formed from a tube.
- any suitable flexible, bio-compatible material can serve for tubing.
- the tubing can comprise a polymer, such as silicone, rubber, polyurethane, pebax or other thermoplastic material.
- the dilating member 100 is formed in a naturally open state, for example using a thermoplastic material.
- a physician can collapse the dilating member 100 by application of tension to a tension member 210 .
- Application of tension to the tension member 210 causes the arms 110 to extend, i.e. straighten, and move towards each other.
- the tension member 210 can comprise a flexible material. Some embodiments use suture thread or other bio-compatible threads.
- a single thread extends through eyelets 120 in the apex of the curve of the arms 110 , while the two ends of the thread extend from one of the eyelets 120 along the lumen 390 to the proximal end 330 of the elongate member 300 .
- Application of tension to the two ends of the thread at the proximal end 330 of the elongate member 300 causes the thread to tighten where it loops through the arms 110 , and draws the arms 110 together.
- the arm 110 labeled A in FIG. 1 a , is shown in more detail.
- the two ends of the thread pass from the outer surface of the arm 210 through the eyelet 120 , and extend along the lumen 390 to the proximal end 330 of the elongate member 300 .
- this arm is threaded differently from the remaining arms 210 .
- only one end of the thread extends through the lumen 390 to the proximal end 330 of the elongate member 300 .
- the other end of the thread can terminate at various alternative locations. For example, the latter end can couple to the remainder of the thread or to one of the arms 110 .
- alternative thread configurations serve as the tension member 210 .
- separate threads can extend to each arm 110 or a single thread can branch to each arm 110 after extending distally through the lumen 390 .
- Another embodiment employs more rigid, linked materials to form the tension member.
- the tension member 210 can comprise a chain or bendably linked rods.
- all arms 110 are threaded by a common closed loop of thread through each eyelet 120 in each arm 110 , and an additional section of thread attaches to the loop an-d extends along the lumen 390 to the proximal end 330 of the elongate member 300 .
- Alternative embodiments utilize other threading configurations that still serve to pull the arms 110 towards each other when a physician applies tension to one or more thread ends at the proximal end of the catheter.
- each arm 110 possesses a centrally located eyelet 120 .
- the tension member 210 passes through the eyelet 120 and continues in either direction to neighboring arms 110 .
- the tension member 210 can pass from neighbor to neighbor, or can pass directly between non-neighbor arms 110 .
- the tension member can pass from the inner or outer surface of the arm 110 .
- FIG. 3 b and FIG. 3 c other embodiments have different numbers or different locations of eyelets 120 in the arms 110 .
- the eyelet 120 can extend laterally through the arm 110 .
- the arm 110 can have two or more eyelets.
- One can satisfactorily employ other eyelet positions and threading configurations for collapsing of the dilating member 100 .
- FIG. 4 an embodiment of a distal portion 350 of an elongate member 300 with a dilating member 100 in the collapsed state is illustrated.
- This embodiment corresponds to the embodiment depicted in FIG. 1 a .
- a physician can readily insert the catheter in, or remove it from, a body cavity.
- Two arms 110 are visible in this view. These arms 110 touch along slit 111 while in the collapsed state.
- a tension member 210 made from suture thread partially visible) passes along the outer surfaces of the arms 110 .
- FIG. 5 a cut-away interior view corresponding to the embodiment of FIG. 4 is shown. Portions of the thread tension member 210 can be seen passing laterally along a portion of the inner surface of one arm 110 , and extending towards the proximal end along the inner surface of another arm 110 . As described above, pulling on the proximal ends of the thread collapses the arms 110 , and holds the arms 110 in the collapsed configuration for insertion or removal of the catheter.
- the catheter includes a second tension member 220 .
- Application of tension to the second tension member 220 causes the dilating member 100 to move to the expanded state.
- the second tension member 220 can comprise a flexible material.
- the second tension member 220 comprises the same material as the tension member 210 .
- the second tension member 220 couples to one of the arms 110 .
- the coupling can be direct, at the distal end 130 of the arms 110 as shown in FIG. 6 a , or indirect, for example by attachment to the extension 310 of the distal end of the elongate member 300 .
- Cooperative releasing and applying of tension to the tension members 210 , 220 causes the dilating member 100 to either expand or collapse.
- the embodiment depicted in FIG. 6 a includes a tension control member 230 .
- the tension control member 230 is disposed at the proximal end of the elongate member 300 .
- the tension control member 230 comprises a tubular section of material, for example, made from a polymer or a metal.
- the tension control member 230 is slidably coupled to the elongate member 300 . A physician can slide the tension control member 230 in either direction parallel to the longitudinal axis of the elongate member 300 .
- the tension members 210 , 220 couple to the tension control member 230 ,
- the couplings are configured so that the tension in one of the tension members 210 , 220 increases while tension in the other tension member 210 , 220 decreases upon motion of the tension control member 230 in one of two directions.
- the tension member 210 extends in a distal direction exterior to the elongate member 300 after exiting the lumen 390 and before attaching to the tension control member 230 (indicated at site “W1”); conversely, the second tension member 220 extends in a proximal direction after exiting the lumen 390 and before attaching to the tension control member 230 (indicated at site “W2”). Attachment can be achieved, for example, by friction or an adhesive.
- FIG. 6 b another embodiment of a tension control member 210 permits adjustment of tension in one or more threads by rotational movements.
- the tension member 210 extends in a counterclockwise (when looking towards the distal end of the catheter) direction exterior to the elongate member 300 after exiting the lumen 390 and before attaching to the tension control member 230 (indicated at site “W1”).
- the second tension member 220 extends in a clockwise direction after exiting the lumen 390 and before attaching to the tension control member 230 (indicated at site “W2”).
- Rotating the tension control member 230 in a clockwise direction causes a pull on the second tension member 220 and a relaxation of the pull on the tension member 210 , thus expanding the dilating member 100 .
- rotating the tension control member 230 in a counterclockwise direction causes a pull on the tension member 210 and a relaxation of the pull on the second tension member 220 , thus collapsing the dilating member 100 .
- the tension member 210 exits the lumen 390 via an aperture 320 in a wall of the elongate member 300 while the second tension member 220 exits the lumen 390 at the proximal end 330 of the elongate member 300 .
- the tension members 210 , 220 both exit the lumen 390 at the proximal end 330 , through an aperture 320 or exit through more than one aperture 320 disposed near the proximal end 330 .
- FIG. 7 a shows the tension control member 230 positioned to hold the dilating member 100 in a collapsed state.
- the physician has extended the tension control member 230 fully in the distal direction.
- the tension control member 230 has a smaller internal radius near its proximal end 232 and distal end 231 than near its central portion. This permits a frictional fit when positioned fully in a proximal or distal direction.
- the frictional fit can be assisted, for example, by an elongate member 300 that has a wider portion near or adjacent to its distal end 330 .
- the tension control member 230 further acts as a locking member to lock the position of the tension members 210 , 220 and thus lock the state of the dilating member 100 .
- An o-ring 260 can assist frictional locking, and help to prevent leakage of fluids from the catheter.
- FIG. 7 b the tension control member 230 is shown in an intermediate position.
- FIG. 7 c is a schematic diagram of the tension control member 230 positioned to hold the dilating member 100 in an expanded state. The physician has moved the tension control member 230 fully in the proximal direction.
- tension control members 230 include one or more differently configured tension control members 230 .
- the tension control member 230 can be rotatably coupled to the elongate member 300 . Movement in clockwise and counterclockwise directions serves to alternately expand and collapse the dilating member 100 .
- rotation of the tension control member 230 causes one tension member 210 , 220 to wind around one spool while the other tension member 210 , 220 unwinds around another spool.
- rotation of the tension control member 230 causes one tension member 210 , 220 to slide against an-d wrap around the elongate member 300 while the other tension member 210 , 220 slides against and unwraps around the elongate member 300 .
- various locking mechanisms can be used to adjust the tension in and lock the positions of one or more threads in a drainage catheter.
- the locking mechanisms can include a member or portion that is attached to one or more threads that exit the lumen 390 at the proximal end 330 of the elongate member 300 , or exit the lumen 390 via one or more an aperture 320 in the wall of the elongate member 300 . Movement of the member or portion permits an increase or a decrease in the tension of a thread.
- FIG. 8 illustrates an embodiment of a lock member 800 .
- the lock member 800 comprises a slotted portion 810 that attaches to the proximal end 330 of the elongate member 300 .
- the slotted portion 810 defines slots 811 that extends through a wall of the slotted portion 810 .
- a housing 820 is disposed around the slotted portion 810 .
- a pin 830 extends inwardly through an aperture 821 in the housing 820 and into the slots 811 to secure the position of the housing 820 relative to the position of the slotted portion 810 .
- One or more tension members 210 , 220 are attached to the housing 820 . Hence, moving the housing 820 along the longitudinal axis of the elongate member 300 (not shown) can be used to increase or decrease the tension of a, tension member 210 or 220 .
- the physician inserts the pin 830 through the aperture 821 into one of a set of predefined locations (indicated by “B”) in the slots 811 .
- the embodiment depicted in FIG. 8 has pin 830 locations for three different levels of tension.
- Other embodiments include slots 811 with fewer or more tensioning levels.
- FIGS. 9 a - c an embodiment of a lock member 900 is shown.
- FIG. 9 a shows a three-dimensional view of the lock member 900
- FIGS. 9 b - c are cross-sectional views of the lock member 900 in locked and unlocked states.
- a housing 920 couples to the proximal end 330 of the elongate member 300 .
- the housing has one or more cutouts 921 .
- a sliding portion 910 fits within the housing 920 and couples to one or more threads.
- a thread can attach to the sliding portion 910 at various locations (for example, indicated by “V”).
- the sliding portion has one or more spring portions 911 that can engage with the cutouts 921 .
- the sliding portion includes stops 912 that limit the travel of the sliding portion 910 in the distal direction.
- FIGS. 10 a - b an embodiment of a Luer lock-based lock member 1000 is shown.
- FIG. 10 a shows a three-dimensional view of the lock member 1000
- FIG. 10 b is a corresponding cross-sectional view of the lock member 1000 .
- a female fitting 1020 couples to the proximal end 330 of the elongate member 300 .
- a male fitting 1010 has threads 1012 that engage corresponding threads 1022 included in the female fitting 1020 .
- the female fitting 1020 includes a spring ratchet 1021 that engages teeth 1023 included in the male fitting 1010 to lock the rotational position of the male fitting 1010 relative to the female fitting 1020 . Pressing on an end (site indicated by “Z”) of the ratchet 1021 disengages the ratchet from the teeth 1023 to permit removal of the male fitting 1010 from the female fitting 1020 .
- the lock member 1000 further includes an o-ring 1040 seated within the male fitting 1010 .
- a proximal end 1024 of the female fitting 1020 presses against the o-ring 1040 when a physician attaches the fittings 1010 , 1020 .
- the o-ring 1040 helps to prevent leakage from the catheter and can further help to secure the position of one or more suture threads 210 , 220 .
- Other embodiments use other sealing members in place of an o-ring 1040 , for example a washer or a grommet.
- the physician simply screws the male fitting 1010 onto the female fitting 1020 after positioning one or more threads with the desired level of tension.
- a thread may pass along one side of or through the o-ring 1040 and then exits the male fitting 1010 through an eyelet on the proximal side of the o-ring 1040 .
- the male fitting 1010 may include an eyelet through which a thread passes into a lumen of the male fitting 1010 .
- one or more eyelets may be variously positioned in the male fitting 1010 or the female fitting 1020 .
- the lock member 1100 includes a grooved portion 1110 fixedly attached to the elongate member 300 .
- the outer surface of the grooved portion 1110 includes a spiral grove 1112 .
- a ring portion 1120 is disposed around the grooved portion 1110 and attached to a tension member comprising a thread 1101 .
- the ring portion 1120 engages a groove 1112 in the grooved portion 1110 that guides the ring portion 1120 in a distal direction as a physician rotates the ring portion 1120 around the grooved portion 1110 .
- As the ring portion 1120 moves in the distal direction it pulls the thread 1101 through eyelets 1111 in the grooved portion 1110 , causing an increase in tension in the thread 1101 .
- ratchet portion 1130 disposed adjacent to the proximal end 330 of the elongate member 300 .
- the ratchet portion 1130 engages teeth 1121 in the ring portion 1120 to secure the position of the thread 1101 .
- the ratchet portion 1130 also permits variably securing the position of the thread 1101 .
- the lock member 1200 includes a tube portion 1210 fixedly attached to the elongate member 300 .
- a sliding portion 1220 is disposed around the tube portion 1210 and attached to a thread 1201 .
- a physician slides the sliding portion 1220 along the tube portion 1210 to increase the tension in the thread 1201 .
- As the sliding portion 1220 moves in the distal direction it pulls the thread 1201 through eyelets 1211 in the tube portion 1210 , causing an increase in tension in the thread 1201 .
- the sliding portion 1220 moves in the distal direction, it eventually contacts a notched portion 1230 disposed adjacent to the proximal end 330 of the elongate member 300 .
- the notched portion 1230 has two opposing notches 1240 engaging flexible teeth 1221 that extend in a distal direction from the sliding portion 1220 to secure the position of the thread 1201 in a tensed position.
- the lock member 1300 includes a tube portion 1310 attached to the elongate member 300 .
- a sliding portion 1320 is disposed around the tube portion 1310 and attached to a thread 1301 .
- a physician slides the sliding portion 1320 along the tube portion 1310 to increase the tension in the thread 1301 .
- As the sliding portion 1320 moves in the distal direction it pulls the thread 1301 through eyelets 1311 in the tube portion 1310 , causing an increase in tension in the thread 1301 .
- the sliding portion 1320 As the sliding portion 1320 moves in the distal direction, it eventually contacts a notched portion 1330 disposed adjacent to the proximal end 330 of the elongate member 300 .
- the notched portion 1330 has a plurality of notches 1335 that engage a plurality of extensions 1321 that extend in a distal direction from the sliding portion 1320 to secure the position of the thread 1301 .
- the physician slightly rotates the sliding portion 1320 so that the extensions 1321 can engage recesses (indicated by “R”) in the notches 1335 by permitting the sliding portion 1320 to return slightly in the proximal direction.
- FIG. 14 another embodiment of a lock member 1400 is shown.
- the embodiment of FIG. 14 is similar in configuration to the embodiment of FIG. 13 .
- a physician moves a sliding portion 1420 in a proximal direction along a tube portion 1410 to increase tension in a thread 1401 .
- the sliding portion 1420 moves in the proximal direction, it pulls the thread 1401 through eyelets 1412 in the tube portion 1410 , causing an increase in tension in the thread 1401 .
- Extensions 1421 in the sliding portion 1420 engage teeth 1412 disposed at the proximal end of the tube portion 1410 to secure the position of the thread 1401 .
- a support portion 1510 is disposed at the proximal end 330 of the elongate member 300 .
- a pivoting portion 1520 is pivotally attached to the support portion 1510 .
- a thread 1501 passes from the lumen 390 of the elongate member 300 through an eyelet 1511 in the support portion 1510 and attaches to one end (indicated by “X”) of the pivoting portion 1520 .
- the support portion 1510 further includes a pivot extension 1515 around which the thread 1501 slides.
- the pivot extension 1515 further engages a notch 1521 in the pivoting portion 1520 to secure the position of the pivoting portion 1520 .
- Other embodiments include more than one pivoting portion 1520 for control of additional threads 1501 .
- the lock member 1600 includes a support member 1610 disposed at the proximal end 330 of the elongate member 300 (not shown).
- One or more folding members 1620 are foldably attached to the support member 1610 .
- each folding member 1620 is coupled to the support member 1610 at a fixed location (indicated by “F”).
- the coupling comprises a folding joint, for example a hinge joint.
- the opposite end of the folding member 1620 is slidably coupled to the support member 1610 (indicated by “S”).
- the folding member 1620 As the folding member 1620 is folded, the slidably coupled end slides toward the fixed location end of the folding member 1620 . When completely folded, the folding member 1620 lies flat against the support member 1610 , and resides in a recess 1616 in the surface of the support member 1610 .
- a thread (not shown) can be attached at various sites along the folding member 1620 to allow a pull or a release of the thread when the folding member 1620 is folded.
- the lock member 1700 includes a support member 1710 disposed at the proximal end 330 of the elongate member 300 .
- One or more flipping members 1720 are flippably attached to the support member 1710 .
- each flipping member 1720 is coupled to the support member 1710 (indicated by “E”).
- the coupling permits the flipping member 1720 simultaneously to slide and rotate by 180°, i.e. flip, relative to the support member 1710 .
- the flipping member 1720 When lying flat against the support member 1710 , the flipping member 1720 resides within a recess 1716 in the surface of the support member 1710 .
- a thread (not shown) can be attached to various sites along the flipping member 1720 to allow a pull or a release of the thread when the flipping member 1720 is folded.
Abstract
A medical device for draining fluid from the body of a patient comprises an elongate member that defines a lumen and includes a proximal end and a distal portion. The device further comprises a dilating member disposed in the distal portion of the elongate member. The dilating member comprises a plurality of arms movable from a collapsed state to an expanded state in which the arms protrude radially to anchor the device within the body of the patient. The device includes a tension member that extends through the lumen to the dilating member and couples to the plurality of arms. Application of tension to the tension member causes the arms to move to the collapsed state thereby permitting insertion and removal of the device into and from the body of the patient. Some embodiments include a tension control member disposed at the proximal end of the elongate member and movable in at least a first direction and a second direction to increase and decrease tension to one or more tension members.
Description
- This application is a continuation of U.S. patent application Ser. No. 09/755,588, filed Jan. 5, 2001, which claims the benefit of and priority to provisional U.S. patent application Ser. No. 60/174,885, filed Jan. 7, 2000, and provisional U.S. patent application Ser. No. 60/195,931, filed Apr. 10, 2000.
- The invention relates to medical catheters, and, more particularly, to drainage catheters with distal anchoring mechanisms.
- Some medical treatments involve the use of a medical catheter with a distal anchor that retains the catheter in position in the body of a patient. Some treatments use a drainage catheter. For example, procedures for the suprapubic catheterization of the bladder drain the bladder after surgery or when an obstruction plugs the genitourinary system. Percutaneously inserted catheters can also drain the kidneys, biliary system, abscesses, other sites of fluid collection and other viscera. As an alternative to providing drainage, percutaneously inserted catheters can introduce substances into the patient's body such a fluids introduced through gastrostomy feeding tubes.
- Since body movements can inadvertently lead to catheter displacement, various anchoring mechanisms have been developed. For example, a Foley bladder catheter includes an inflatable balloon at the distal end, an inflation channel in the walls of the catheter, an external supply of inflation fluid connected to the channel and a valve to keep the fluid in place and the balloon inflated.
- Alternatively, the distal end of the catheter can include a “pigtail loop” formed from a flexible tube. Typically, the pigtail loop is preformed from a shape-memory material. For introduction into a patient, a physician inserts a stiff cannula or stylet into the catheter lumen to straighten the pigtail loop. The distal end of the flexible tube returns to the pigtail configuration after the physician removes the cannula. In some cases, return to the pigtail configuration may be aided or secured by the use of a suture thread that extends through draw ports at two spaced positions on the flexible tube. These draw ports move toward each other when the physician removes the cannula. The physician can then take up slack and secure the pigtail by applying tension to the suture thread. To remove the catheter, the physician can reverse the above procedures.
- Other anchor mechanisms include malecots with “wings” or “arms” in a distal portion of the catheter wall. The application of force to a distal tip of the catheter can expand the wings, and the wings extend outward protruding radially to create an anchor for the catheter. The force can be applied by pulling on a suture string or a rod extending through the lumen of the catheter. Alternatively, the wings of the malecot can be formed from a shape-memory material with a naturally protruding configuration, and a stylet is used to push the distal end of the catheter and collapse the malecot.
- A catheter according to the invention does not require the use of a shape-memory material, a stylet, or dual tubes for collapsing an anchor mechanism. Also, catheters according to the invention do not require a physician to manipulate separately two different tension members (e.g., two sutures) extending through the catheter lumen.
- A catheter of the present invention includes one or more tension members to pull on one or more arms of a dilating member to collapse the dilating member. The tension members, in cooperation with a lock member, can secure the dilating member in a collapsed state. A single tension control member (located, for example, at the proximal end of the catheter), and operable with one hand, can simultaneously produce opposite changes in tension in two tension members attached to a dilating member.
- Catheters according to the invention do not require stylets. A physician can collapse and secure the dilating member, for insertion or removal of the catheter, by applying tension (e.g., a pulling force) to a tension member. Further, catheters of the invention can include a tension control member that cooperatively controls the tension in two separate tension members to permit a physician securely and controllably to expand and collapse the dilating member with the use of just one hand.
- In general, in one aspect, the invention features a medical device for draining fluid from the body of a patient. The device comprises an elongate member that defines a lumen and includes a proximal end and a distal portion. The device further comprises a dilating member disposed in the distal portion of the elongate member. The dilating member comprises a plurality of arms movable from a collapsed state to an expanded state in which the arms protrude radially to anchor the device within the body of the patient. The device further comprises a tension member extending through the lumen to the dilating member and coupled to the plurality of arms such that the application of tension to the tension member causes the arms to move to the collapsed state thereby permitting insertion and removal of the device into and from the body of the patient.
- Embodiments of this aspect of the invention can include the following features. The device can include a second tension member extending through the lumen to the dilating member. The second tension member couples to a distal end of at least one of the arms such that application of tension to the second tension member causes the arms to move to the expanded state.
- The device can further include a tension control member disposed at the proximal end of the elongate member, movable in at least a first direction and a second direction. The tension control member is coupled to the tension members such that movement of the tension control member in the first direction causes an increase in tension of the tension member and a decrease in tension of the second tension member that causes the arms to move to the collapsed state. Movement of the tension control member in the second direction causes an increase in tension of the second tension member and a decrease in tension of the tension member that causes the arms to move to the expanded state.
- In some embodiments, the tension members comprise a flexible material. In some embodiments, the tension control member is slidably coupled to the elongate member to permit movement in proximal and distal directions. In other embodiments, the tension control member is rotatably coupled to the elongate member to permit clockwise and counterclockwise rotational movement around a longitudinal axis of the elongate member. In some embodiments, the tension control member is lockable to fix the tensions in the tension members to secure the arms when in the collapsed state, and when in the expanded state.
- In general, in another aspect, the invention features a device with a tension control member that cooperatively adjusts the tension in at least two tension members. The device comprises an elongate member that defines a lumen and includes a proximal end and a distal portion. A tension control member is disposed at the proximal end of the elongate member and movable in at least a first direction and a second direction. A first tension member couples to the tension control member at a first site and extends through the lumen to the distal portion. A second tension member couples to the tension control member at a second site and extends through the lumen to the distal portion.
- Movement of the tension control member in the first direction causes an increase in tension of the first tension member and a decrease in tension of the second tension member. Conversely, movement of the tension control member in the second direction causes an increase in tension of the second tension member and a decrease in tension of the first tension member.
- Embodiments of this aspect of the invention can include the following features. The first and second tension members can comprise a flexible material. The tension control member can be slidably coupled to the elongate member to permit movement in proximal and distal directions. In other embodiments, the tension control member is rotatably coupled to the elongate member to permit clockwise and counterclockwise rotational movement around a longitudinal axis of the elongate member.
- The foregoing and other objects, aspects, features, and advantages of the invention will become more apparent from the following description and from the claims.
- In the drawings, like reference characters generally refer to the same parts throughout the different views. Also, the drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention.
-
FIG. 1 a is a three-dimensional view of the distal portion of an embodiment of a drainage catheter according to the invention. -
FIG. 1 b is a three-dimensional view of the distal portion of an embodiment of a drainage catheter according to the invention. -
FIG. 2 is an enlarged view of the arm “A” ofFIG. 1 a. -
FIG. 3 a-c are three-dimensional views of three embodiments of a dilating member arm. -
FIG. 4 is a side view of the exterior of an embodiment of a dilating member in a collapsed state. -
FIG. 5 is a cutaway interior view that corresponds toFIG. 4 . -
FIG. 6 a is a cutaway view of an embodiment of a drainage catheter according to the invention that includes two tension members a slidable tension control member. -
FIG. 6 b is a cutaway view of an embodiment of a rotatable tension control member. -
FIG. 7 a-c are cutaway views that illustrate use of an embodiment of a tension control member. -
FIG. 8 is a three-dimensional view of an embodiment of a lock member that includes a slotted portion. -
FIG. 9 a is a three-dimensional view of an embodiment of a lock member that includes a sliding portion. -
FIG. 9 b is a cross-sectional view of the embodiment ofFIG. 9 a in a locked state, -
FIG. 9 c is a cross-sectional view of the embodiment ofFIG. 9 a in an unlocked state. -
FIG. 10 a is a three-dimensional view of an embodiment of a lock member. -
FIG. 10 b is a cross-sectional view that corresponds toFIG. 10 a. -
FIG. 11 is a three-dimensional view of an embodiment of a lock member that includes a ring portion. -
FIG. 12 is a three-dimensional view of an embodiment of a lock member that includes a sliding portion. -
FIG. 13 is a three-dimensional view of an embodiment of a lock member that includes a sliding portion. -
FIG. 14 is a three-dimensional view of an embodiment of a lock member that includes a sliding portion. -
FIG. 15 is a three-dimensional view of an embodiment of a lock member that includes a pivoting member. -
FIG. 16 is a three-dimensional view of an embodiment of a lock member that includes a folding member. -
FIG. 17 is a three-dimensional view of an embodiment of a lock member that includes a flipping member. - Referring to
FIG. 1 a, a physician can use amedical device 98 according to the invention for draining fluid or removing other materials from the body of a patient (the term “physician” is here understood to refer generally to any medical worker). For example, thedevice 98 can be employed as a catheter for multi-stage percutaneous stone removal or nephrostomy drainage. Other uses include, for example, insertion of the device into a patient for drainage of the bladder, the kidneys, the biliary system, abscesses, other sites of fluid collection and other viscera. As an alternative to providing drainage, percutaneously inserted catheters can introduce substances into the patient's body, such as fluids introduced through gastrostomy feeding tubes. - The
device 98 comprises a dilatingmember 100 disposed in adistal portion 350 of an elongate member 300 (see alsoFIG. 6 a). The elongate member 300 (partially shown) defines at least one internal Itumen 390 (seeFIG. 6 a) for transporting bodily fluid, and theelongate member 300 includes a proximal end 330 (seeFIG. 6 a) and thedistal portion 350. - Optionally, the
elongate member 300 further comprises adistal extension 310 adjacent to adistal end 190 of the dilatingmember 100. Other embodiments include no extension (seeFIG. 4 ). Use of adistal extension 310 varies with the medical application. For example, thedistal extension 310 can be inserted in the ureter to capture urine flow. Alternatively, the dilating portion of a catheter without an extension can reside inside a kidney to directly drain the kidney. - The dilating
member 100 comprises one ormore arms 110. In the embodiment depicted inFIG. 1 a, the dilating member has fourarms 110. Flexing or extending thearms 110 respectively serves to configure the dilatingmember 100 in an expanded state, i.e. bent arms, or a contracted state, i.e.straight arms 110. When in the collapsed state, a physician can insert thedistal portion 350 of theelongate member 300 and the dilating-member 100 into an orifice or incision in a patient. When in the expanded state, the dilatingmember 100 anchors themedical device 98 in the body of the patient. Referring to FIG. I b, another embodiment of the dilatingmember 100 comprises one or morecurving arms 110 that each are free at one end. - As shown in the embodiment depicted in
FIG. 1 a,arms 110 can be fabricated by making slits in anelongate member 300 formed from a tube. In general, any suitable flexible, bio-compatible material can serve for tubing. For example, the tubing can comprise a polymer, such as silicone, rubber, polyurethane, pebax or other thermoplastic material. Alternatively, one can bendably attacharms 110 to theelongate member 300, for example via hinges. - In the embodiment depicted in
FIG. 1 a, the dilatingmember 100 is formed in a naturally open state, for example using a thermoplastic material. A physician can collapse the dilatingmember 100 by application of tension to atension member 210. Application of tension to thetension member 210 causes thearms 110 to extend, i.e. straighten, and move towards each other. - The
tension member 210 can comprise a flexible material. Some embodiments use suture thread or other bio-compatible threads. In the embodiment ofFIG. 1 a, a single thread extends througheyelets 120 in the apex of the curve of thearms 110, while the two ends of the thread extend from one of theeyelets 120 along thelumen 390 to theproximal end 330 of theelongate member 300. Application of tension to the two ends of the thread at theproximal end 330 of theelongate member 300 causes the thread to tighten where it loops through thearms 110, and draws thearms 110 together. - Referring to
FIG. 2 , thearm 110, labeled A inFIG. 1 a, is shown in more detail. The two ends of the thread pass from the outer surface of thearm 210 through theeyelet 120, and extend along thelumen 390 to theproximal end 330 of theelongate member 300. Hence, in the embodiment depicted inFIG. 1 , this arm is threaded differently from the remainingarms 210. - In other embodiments, only one end of the thread extends through the
lumen 390 to theproximal end 330 of theelongate member 300. The other end of the thread can terminate at various alternative locations. For example, the latter end can couple to the remainder of the thread or to one of thearms 110. - In other embodiments, alternative thread configurations serve as the
tension member 210. For example, separate threads can extend to eacharm 110 or a single thread can branch to eacharm 110 after extending distally through thelumen 390. Another embodiment employs more rigid, linked materials to form the tension member. For example, thetension member 210 can comprise a chain or bendably linked rods. - In another embodiment, all
arms 110 are threaded by a common closed loop of thread through eacheyelet 120 in eacharm 110, and an additional section of thread attaches to the loop an-d extends along thelumen 390 to theproximal end 330 of theelongate member 300. Alternative embodiments utilize other threading configurations that still serve to pull thearms 110 towards each other when a physician applies tension to one or more thread ends at the proximal end of the catheter. - Referring to
FIG. 3 a, the threading of the threeother arms 110 corresponding to the embodiment ofFIG. 1 a is illustrated. Eacharm 110 possesses a centrally locatedeyelet 120. Thetension member 210 passes through theeyelet 120 and continues in either direction to neighboringarms 110. One can vary the direction of threading of thetension member 210 through theeyelets 120 in thearms 110. For example, thetension member 210 can pass from neighbor to neighbor, or can pass directly betweennon-neighbor arms 110. Further, as thetension member 210 passes through theeyelet 120 on aparticular arm 110, the tension member can pass from the inner or outer surface of thearm 110. - Referring to
FIG. 3 b andFIG. 3 c, other embodiments have different numbers or different locations ofeyelets 120 in thearms 110. As illustrated byFIG. 3 b, theeyelet 120 can extend laterally through thearm 110. As illustrated byFIG. 3c , thearm 110 can have two or more eyelets. One can satisfactorily employ other eyelet positions and threading configurations for collapsing of the dilatingmember 100. - Referring to
FIG. 4 , an embodiment of adistal portion 350 of anelongate member 300 with a dilatingmember 100 in the collapsed state is illustrated. This embodiment corresponds to the embodiment depicted inFIG. 1 a. In this collapsed configuration, a physician can readily insert the catheter in, or remove it from, a body cavity. Twoarms 110 are visible in this view. Thesearms 110 touch alongslit 111 while in the collapsed state. Atension member 210 made from suture thread partially visible) passes along the outer surfaces of thearms 110. - Referring to
FIG. 5 , a cut-away interior view corresponding to the embodiment ofFIG. 4 is shown. Portions of thethread tension member 210 can be seen passing laterally along a portion of the inner surface of onearm 110, and extending towards the proximal end along the inner surface of anotherarm 110. As described above, pulling on the proximal ends of the thread collapses thearms 110, and holds thearms 110 in the collapsed configuration for insertion or removal of the catheter. - Referring to
FIG. 6 a, another embodiment of a catheter is illustrated. The catheter includes asecond tension member 220. Application of tension to thesecond tension member 220 causes the dilatingmember 100 to move to the expanded state. Thesecond tension member 220 can comprise a flexible material. In some embodiments, thesecond tension member 220 comprises the same material as thetension member 210. Thesecond tension member 220 couples to one of thearms 110. The coupling can be direct, at thedistal end 130 of thearms 110 as shown inFIG. 6 a, or indirect, for example by attachment to theextension 310 of the distal end of theelongate member 300. - Cooperative releasing and applying of tension to the
tension members member 100 to either expand or collapse. To better control such tension, the embodiment depicted inFIG. 6 a includes atension control member 230. Thetension control member 230 is disposed at the proximal end of theelongate member 300. In this embodiment, thetension control member 230 comprises a tubular section of material, for example, made from a polymer or a metal. In this embodiment, thetension control member 230 is slidably coupled to theelongate member 300. A physician can slide thetension control member 230 in either direction parallel to the longitudinal axis of theelongate member 300. - The
tension members tension control member 230, The couplings are configured so that the tension in one of thetension members other tension member tension control member 230 in one of two directions. In the embodiment depicted inFIG. 6 a, thetension member 210 extends in a distal direction exterior to theelongate member 300 after exiting thelumen 390 and before attaching to the tension control member 230 (indicated at site “W1”); conversely, thesecond tension member 220 extends in a proximal direction after exiting thelumen 390 and before attaching to the tension control member 230 (indicated at site “W2”). Attachment can be achieved, for example, by friction or an adhesive. - Sliding the
tension control member 230 in a proximal direction causes a pull on thesecond tension member 220 and a relaxation of the pull on thetension member 210, thus expanding the dilatingmember 100. Conversely, sliding thetension control member 230 in a distal direction causes a pull on thetension member 210 and a relaxation of the pull on thesecond tension member 220, thus collapsing the dilatingmember 100. - Referring to
FIG. 6 b, another embodiment of atension control member 210 permits adjustment of tension in one or more threads by rotational movements. In the embodiment depicted inFIG. 6 b, thetension member 210 extends in a counterclockwise (when looking towards the distal end of the catheter) direction exterior to theelongate member 300 after exiting thelumen 390 and before attaching to the tension control member 230 (indicated at site “W1”). Conversely, thesecond tension member 220 extends in a clockwise direction after exiting thelumen 390 and before attaching to the tension control member 230 (indicated at site “W2”). - Rotating the
tension control member 230 in a clockwise direction causes a pull on thesecond tension member 220 and a relaxation of the pull on thetension member 210, thus expanding the dilatingmember 100. Conversely, rotating thetension control member 230 in a counterclockwise direction causes a pull on thetension member 210 and a relaxation of the pull on thesecond tension member 220, thus collapsing the dilatingmember 100. - As depicted in
FIG. 6 a, thetension member 210 exits thelumen 390 via anaperture 320 in a wall of theelongate member 300 while thesecond tension member 220 exits thelumen 390 at theproximal end 330 of theelongate member 300. In other embodiments, thetension members lumen 390 at theproximal end 330, through anaperture 320 or exit through more than oneaperture 320 disposed near theproximal end 330. - Referring to
FIG. 7 , atension control member 230 corresponding toFIG. 6 a is shown in more detail.FIG. 7 a shows thetension control member 230 positioned to hold the dilatingmember 100 in a collapsed state. The physician has extended thetension control member 230 fully in the distal direction. In the embodiment ofFIG. 7 , thetension control member 230 has a smaller internal radius near itsproximal end 232 anddistal end 231 than near its central portion. This permits a frictional fit when positioned fully in a proximal or distal direction. The frictional fit can be assisted, for example, by anelongate member 300 that has a wider portion near or adjacent to itsdistal end 330. Hence, thetension control member 230 further acts as a locking member to lock the position of thetension members member 100. An o-ring 260 can assist frictional locking, and help to prevent leakage of fluids from the catheter. - Referring to
FIG. 7 b, thetension control member 230 is shown in an intermediate position.FIG. 7 c is a schematic diagram of thetension control member 230 positioned to hold the dilatingmember 100 in an expanded state. The physician has moved thetension control member 230 fully in the proximal direction. - Other embodiments include one or more differently configured
tension control members 230. For example, thetension control member 230 can be rotatably coupled to theelongate member 300. Movement in clockwise and counterclockwise directions serves to alternately expand and collapse the dilatingmember 100. In one alternative embodiment, rotation of thetension control member 230 causes onetension member other tension member tension control member 230 causes onetension member elongate member 300 while theother tension member elongate member 300. - Referring to
FIGS. 8-16 , various locking mechanisms can be used to adjust the tension in and lock the positions of one or more threads in a drainage catheter. The locking mechanisms can include a member or portion that is attached to one or more threads that exit thelumen 390 at theproximal end 330 of theelongate member 300, or exit thelumen 390 via one or more anaperture 320 in the wall of theelongate member 300. Movement of the member or portion permits an increase or a decrease in the tension of a thread. -
FIG. 8 . illustrates an embodiment of alock member 800. Thelock member 800 comprises a slottedportion 810 that attaches to theproximal end 330 of theelongate member 300. The slottedportion 810 definesslots 811 that extends through a wall of the slottedportion 810. Ahousing 820 is disposed around the slottedportion 810. Apin 830 extends inwardly through anaperture 821 in thehousing 820 and into theslots 811 to secure the position of thehousing 820 relative to the position of the slottedportion 810. One ormore tension members housing 820. Hence, moving thehousing 820 along the longitudinal axis of the elongate member 300 (not shown) can be used to increase or decrease the tension of a,tension member - After positioning the
housing 820 for a desired level of tension, the physician inserts thepin 830 through theaperture 821 into one of a set of predefined locations (indicated by “B”) in theslots 811. The embodiment depicted inFIG. 8 haspin 830 locations for three different levels of tension. Other embodiments includeslots 811 with fewer or more tensioning levels. - Referring to
FIGS. 9 a-c, an embodiment of alock member 900 is shown.FIG. 9 a shows a three-dimensional view of thelock member 900, whileFIGS. 9 b-c are cross-sectional views of thelock member 900 in locked and unlocked states. Ahousing 920 couples to theproximal end 330 of theelongate member 300. The housing has one ormore cutouts 921. A slidingportion 910 fits within thehousing 920 and couples to one or more threads. A thread can attach to the slidingportion 910 at various locations (for example, indicated by “V”). The sliding portion has one ormore spring portions 911 that can engage with thecutouts 921. By pressing on thespring portions 911 through thecutouts 921, a physician can disengage thespring portions 911 from thecutouts 921, to permit sliding of the slidingportion 910 in a distal direction. In this embodiment, the sliding portion includesstops 912 that limit the travel of the slidingportion 910 in the distal direction. - Referring to
FIGS. 10 a-b, an embodiment of a Luer lock-basedlock member 1000 is shown.FIG. 10 a shows a three-dimensional view of thelock member 1000, whileFIG. 10 b is a corresponding cross-sectional view of thelock member 1000. Afemale fitting 1020 couples to theproximal end 330 of theelongate member 300. Amale fitting 1010 hasthreads 1012 that engage correspondingthreads 1022 included in thefemale fitting 1020. Thefemale fitting 1020 includes aspring ratchet 1021 that engagesteeth 1023 included in themale fitting 1010 to lock the rotational position of themale fitting 1010 relative to thefemale fitting 1020. Pressing on an end (site indicated by “Z”) of theratchet 1021 disengages the ratchet from theteeth 1023 to permit removal of the male fitting 1010 from thefemale fitting 1020. - The
lock member 1000 further includes an o-ring 1040 seated within themale fitting 1010. Aproximal end 1024 of thefemale fitting 1020 presses against the o-ring 1040 when a physician attaches thefittings ring 1040 helps to prevent leakage from the catheter and can further help to secure the position of one ormore suture threads ring 1040, for example a washer or a grommet. - One can use the
lock member 1000 in combination with one or more tension member threads. In one embodiment, the physician simply screws themale fitting 1010 onto thefemale fitting 1020 after positioning one or more threads with the desired level of tension. In another embodiment, a thread may pass along one side of or through the o-ring 1040 and then exits themale fitting 1010 through an eyelet on the proximal side of the o-ring 1040. In another embodiment, themale fitting 1010 may include an eyelet through which a thread passes into a lumen of themale fitting 1010. In other embodiments, one or more eyelets may be variously positioned in themale fitting 1010 or thefemale fitting 1020. - Referring to
FIG. 11 , another embodiment of a lock member 1100 is shown. The lock member 1100 includes agrooved portion 1110 fixedly attached to theelongate member 300. The outer surface of the groovedportion 1110 includes aspiral grove 1112. Aring portion 1120 is disposed around the groovedportion 1110 and attached to a tension member comprising athread 1101. Thering portion 1120 engages agroove 1112 in the groovedportion 1110 that guides thering portion 1120 in a distal direction as a physician rotates thering portion 1120 around the groovedportion 1110. As thering portion 1120 moves in the distal direction, it pulls thethread 1101 througheyelets 1111 in the groovedportion 1110, causing an increase in tension in thethread 1101. - As the
ring portion 1120 moves in the distal direction, it eventually contacts aratchet portion 1130 disposed adjacent to theproximal end 330 of theelongate member 300. Theratchet portion 1130 engagesteeth 1121 in thering portion 1120 to secure the position of thethread 1101. Theratchet portion 1130 also permits variably securing the position of thethread 1101. - Referring to
FIG. 12 , another embodiment of a lock member 1200 is shown. The lock member 1200 includes atube portion 1210 fixedly attached to theelongate member 300. A slidingportion 1220 is disposed around thetube portion 1210 and attached to athread 1201. A physician slides the slidingportion 1220 along thetube portion 1210 to increase the tension in thethread 1201. As the slidingportion 1220 moves in the distal direction, it pulls thethread 1201 througheyelets 1211 in thetube portion 1210, causing an increase in tension in thethread 1201. - As the sliding
portion 1220 moves in the distal direction, it eventually contacts a notchedportion 1230 disposed adjacent to theproximal end 330 of theelongate member 300. The notchedportion 1230 has two opposingnotches 1240 engagingflexible teeth 1221 that extend in a distal direction from the slidingportion 1220 to secure the position of thethread 1201 in a tensed position. - Referring to
FIG. 13 , another embodiment of a lock member 1300 is shown. The lock member 1300 includes atube portion 1310 attached to theelongate member 300. A slidingportion 1320 is disposed around thetube portion 1310 and attached to athread 1301. A physician slides the slidingportion 1320 along thetube portion 1310 to increase the tension in thethread 1301. As the slidingportion 1320 moves in the distal direction, it pulls thethread 1301 througheyelets 1311 in thetube portion 1310, causing an increase in tension in thethread 1301. - As the sliding
portion 1320 moves in the distal direction, it eventually contacts a notchedportion 1330 disposed adjacent to theproximal end 330 of theelongate member 300. The notchedportion 1330 has a plurality ofnotches 1335 that engage a plurality ofextensions 1321 that extend in a distal direction from the slidingportion 1320 to secure the position of thethread 1301. The physician slightly rotates the slidingportion 1320 so that theextensions 1321 can engage recesses (indicated by “R”) in thenotches 1335 by permitting the slidingportion 1320 to return slightly in the proximal direction. - Referring to
FIG. 14 , another embodiment of a lock member 1400 is shown. The embodiment ofFIG. 14 is similar in configuration to the embodiment ofFIG. 13 . Here, however, a physician moves a slidingportion 1420 in a proximal direction along atube portion 1410 to increase tension in athread 1401. As the slidingportion 1420 moves in the proximal direction, it pulls thethread 1401 througheyelets 1412 in thetube portion 1410, causing an increase in tension in thethread 1401.Extensions 1421 in the slidingportion 1420 engageteeth 1412 disposed at the proximal end of thetube portion 1410 to secure the position of thethread 1401. - Referring to
FIG. 15 , still another embodiment of a lock member 1500 is shown. Asupport portion 1510 is disposed at theproximal end 330 of theelongate member 300. A pivotingportion 1520 is pivotally attached to thesupport portion 1510. Athread 1501 passes from thelumen 390 of theelongate member 300 through aneyelet 1511 in thesupport portion 1510 and attaches to one end (indicated by “X”) of the pivotingportion 1520. - When a physician or other medical worker rotates the pivoting
portion 1520 around an axis perpendicular to the longitudinal axis of theelongate member 300, the rotating member either pulls on or releases the pull on thethread 1501. Hence, the tension in thethread 1510 is increased or reduced, depending on the direction of rotation. Thesupport portion 1510 further includes apivot extension 1515 around which thethread 1501 slides. Thepivot extension 1515 further engages anotch 1521 in the pivotingportion 1520 to secure the position of the pivotingportion 1520. Other embodiments include more than onepivoting portion 1520 for control ofadditional threads 1501. - Referring to
FIG. 16 , another embodiment of a lock member 1600 is shown. The lock member 1600 includes asupport member 1610 disposed at theproximal end 330 of the elongate member 300 (not shown). One or morefolding members 1620 are foldably attached to thesupport member 1610. - One end of each
folding member 1620 is coupled to thesupport member 1610 at a fixed location (indicated by “F”). The coupling comprises a folding joint, for example a hinge joint. The opposite end of thefolding member 1620 is slidably coupled to the support member 1610 (indicated by “S”). - As the
folding member 1620 is folded, the slidably coupled end slides toward the fixed location end of thefolding member 1620. When completely folded, thefolding member 1620 lies flat against thesupport member 1610, and resides in arecess 1616 in the surface of thesupport member 1610. A thread (not shown) can be attached at various sites along thefolding member 1620 to allow a pull or a release of the thread when thefolding member 1620 is folded. - Referring to
FIG. 17 , another embodiment of a lock member 1700 is shown. The lock member 1700 includes asupport member 1710 disposed at theproximal end 330 of theelongate member 300. One ormore flipping members 1720 are flippably attached to thesupport member 1710. - One end of each flipping
member 1720 is coupled to the support member 1710 (indicated by “E”). The coupling permits the flippingmember 1720 simultaneously to slide and rotate by 180°, i.e. flip, relative to thesupport member 1710. - When lying flat against the
support member 1710, the flippingmember 1720 resides within arecess 1716 in the surface of thesupport member 1710. A thread (not shown) can be attached to various sites along the flippingmember 1720 to allow a pull or a release of the thread when the flippingmember 1720 is folded. - Variations, modifications, and other implementations of what is described herein will occur to those of ordinary skill in the art without departing from the spirit and the scope of the invention as claimed. Accordingly, the invention is to be defined not by the preceding illustrative description but instead by the spirit and scope of the following claims.
Claims (2)
1-20. (canceled)
21. A medical device, the device comprising:
an elongate member;
a dilating member disposed in a distal portion of the elongate member and movable from a collapsed state to an expanded sate to anchor the device within a body; and
a tension member coupled to the dilating member such that an application of tension to the tension member causes the dilating member to move to the collapsed state thereby permitting removal of he device from the body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/102,580 US20050215980A1 (en) | 2000-01-07 | 2005-04-08 | Drainage catheter |
Applications Claiming Priority (5)
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US17488500P | 2000-01-07 | 2000-01-07 | |
US19593100P | 2000-04-10 | 2000-04-10 | |
US09/755,588 US6547761B2 (en) | 2000-01-07 | 2001-01-05 | Drainage catheter |
US10/375,488 US6893418B2 (en) | 2000-01-07 | 2003-02-27 | Drainage catheter with dilating member |
US11/102,580 US20050215980A1 (en) | 2000-01-07 | 2005-04-08 | Drainage catheter |
Related Parent Applications (1)
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US10/375,488 Continuation US6893418B2 (en) | 2000-01-07 | 2003-02-27 | Drainage catheter with dilating member |
Publications (1)
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US20050215980A1 true US20050215980A1 (en) | 2005-09-29 |
Family
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Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
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US09/755,588 Expired - Lifetime US6547761B2 (en) | 2000-01-07 | 2001-01-05 | Drainage catheter |
US10/375,488 Expired - Fee Related US6893418B2 (en) | 2000-01-07 | 2003-02-27 | Drainage catheter with dilating member |
US11/102,580 Abandoned US20050215980A1 (en) | 2000-01-07 | 2005-04-08 | Drainage catheter |
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Application Number | Title | Priority Date | Filing Date |
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US09/755,588 Expired - Lifetime US6547761B2 (en) | 2000-01-07 | 2001-01-05 | Drainage catheter |
US10/375,488 Expired - Fee Related US6893418B2 (en) | 2000-01-07 | 2003-02-27 | Drainage catheter with dilating member |
Country Status (1)
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US (3) | US6547761B2 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US6547761B2 (en) | 2003-04-15 |
US20010049494A1 (en) | 2001-12-06 |
US6893418B2 (en) | 2005-05-17 |
US20030144636A1 (en) | 2003-07-31 |
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STCB | Information on status: application discontinuation |
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Owner name: BOSTON SCIENTIFIC SCIMED, INC., MINNESOTA Free format text: CHANGE OF NAME;ASSIGNOR:SCIMED LIFE SYSTEMS, INC.;REEL/FRAME:020171/0947 Effective date: 20041222 Owner name: SCIMED LIFE SYSTEMS, INC., MINNESOTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIU, CLIFFORD M.;REEL/FRAME:020171/0936 Effective date: 20010116 |