WO2005044351B1 - Safety device for a syringe - Google Patents

Safety device for a syringe

Info

Publication number
WO2005044351B1
WO2005044351B1 PCT/US2004/034959 US2004034959W WO2005044351B1 WO 2005044351 B1 WO2005044351 B1 WO 2005044351B1 US 2004034959 W US2004034959 W US 2004034959W WO 2005044351 B1 WO2005044351 B1 WO 2005044351B1
Authority
WO
WIPO (PCT)
Prior art keywords
shield
medical device
barrel
stopper
reservoir
Prior art date
Application number
PCT/US2004/034959
Other languages
French (fr)
Other versions
WO2005044351A1 (en
Inventor
Jamie Crawford
Frank Francavilla
Roger Groskopf
Original Assignee
Becton Dickinson Co
Jamie Crawford
Frank Francavilla
Roger Groskopf
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Becton Dickinson Co, Jamie Crawford, Frank Francavilla, Roger Groskopf filed Critical Becton Dickinson Co
Priority to EP04796023.2A priority Critical patent/EP1694389B1/en
Priority to JP2006539535A priority patent/JP4771957B2/en
Priority to ES04796023T priority patent/ES2714558T3/en
Publication of WO2005044351A1 publication Critical patent/WO2005044351A1/en
Publication of WO2005044351B1 publication Critical patent/WO2005044351B1/en

Links

Classifications

    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247—Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • A61M2005/3261—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between sleeve and syringe barrel, e.g. spreading of sleeve retaining hooks having slanted surfaces by engagement with conically shaped collet of the piston rod during the last portion of the injection stroke of the plunger
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • A61M2005/3261—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between sleeve and syringe barrel, e.g. spreading of sleeve retaining hooks having slanted surfaces by engagement with conically shaped collet of the piston rod during the last portion of the injection stroke of the plunger
    • A61M2005/3263—Trigger provided at the distal end, i.e. syringe end for mounting a needle

Abstract

A medical device including a syringe assembly (2) and a shield system for delivering medicament to a patient. The syringe assembly includes a barrel (10) defining a medicament reservoir, a needle cannula (18) coupled to the barrel and in fluid communication with the reservoir (13), a plunger (12) having a stopper (14) positioned in the reservoir and a thumb pad (15) for moving the plunger in the reservoir. The shield system has a first shield (27) coupled to a forward end of the barrel, and a second shield movable from a first position disposed from the needle cannula tip to a second position covering the needle cannula tip. An urging member (16) controlled by a retaining device (32,26) urges the second shield to the second position upon movement of the stopper to a position which releases the retaining device.

Claims

AMENDED CLAIMS [received by the International Bureau on 04 April 2005 (04.04.05); original claims 1-43 replaced by amended claims 1-27 (5 pages)]
1. A medical device for dehvering a medicament to a patient, comprising: a syringe assembly comprising: a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained; and a stopper rαovably disposed in said reservoir, said stopper being movable within said reservoir to cause the medicament to be expelled from said reservoir; and a shield system comprising: a first shield on said forward end of said barrel; a second shield movable from a first position to a second position, said forward tip of said needle cannula tip being within said second shield when said second shield is in said second position; means for urging said second shield toward said second position; means for retaining said second shield in said first position; characterized in that- said syringe assembly further comprises a needle assembly mσvably coupled to said forward end of said barrel and being in fluid ∞nτmunication wrth said reservoir- said needle assembly being movable upon movement of said stopper in said barrel to a deployment position; and said shield system further comprises means for releasing said retaining • means in response to movement of said needle assembly and upon movement of said stopper in . said barrel to a deployment position.
26
2. The medical device of claim 1, wherein said shield system is arranged on said syringe assembly such that said shield system is positioned in front of said reservoir so as not to visually obstruct said reservoir and the medicament held therein.
3. The medical device of claim ls wherein said second shield is located in said first shield when said second shield is in said first position.
4. The medical device of claim 3, wherein said second shield comprises a flange at an end of said second shield facing said barrel, said let n g means acting on said flange for holding said second shield in said first position.
5. The medical device of claim 4, wherein said retaining means comprises' a flexible arm having a retaining member for interaction with said flange.
6. The medical device of claim 5, wherein said releasing means comprises a tubular element arranged on said needle cannula and sealingly inserted with said needle cannula in an opening at said front of said barrel.
7. The medical device of claim 6, wherein said tubular element extends into said barrel such that said stopper contacts said tubular element at a contact position before said stopper is fully inserted in said barrel, said tubular element being movable by. said stopper as said stopper moves from said contact position to the release mechanism deployment position, said tubular- element forcing said flexible aim of said retaining device radially outward when said tubular element is moved by said stopper.
8. The medical device of claim .7, wherein said urging member is arranged between said tubular element and said second shield.
9. The medical device of claim 7, wherein said tubular element comprises a tubular portion and a flange portion arranged between two longitudinal ends of said tubular portion, said tubular portion being molded from a rigid material for supporting said needle cannula and said flange portion being molded from a flexible material having a flexibility sufficient to provide a seal at the forward end of said barrel.
10. . The medical device of claim 9, wherein said flange portion interacts with said .retaining device to release"said second shield.
11. The medical device of claim 9, wherein said urging member is arranged between said flange portion of said tubular element and said second shield, 1 . The medical device of claim 4, wherein a front end of said first shield comprises a lip for retaining the flange of said second shield at said second position when said second shield is moved to said second position. 13. The medical device of claim 12, further comprising a locking device for locking said second shield in said second position. 14. The shield system of claim 12, wherein said lip includes first and second sections axially offset from each other for engaging said flange of said second shield when said second shield is moved to said second position for causing misalignment of said second shield with respect to a longitudinal axis of said needle cannula. 15. The medical device of claim 13, wherein said locking device allows said flange to pass said locking device as said second shield moves toward said second position and prevents said second shield from moving back toward said first position from said second position. 16. The medical- device of claim 3, wherein said second shield comprises an annular bump between first and .second ends of said second shield, wherein said retaining means comprises a lip arranged at a front end of said first shield interacting with said annular bump. 17. The medical' device of claim 16, wherein said releasing means comprises a tubular
28 element arranged on said needle cannula and comprising a hub portion facing said barrel, said stopper contacting said hub portion at a contact position before said stopper is fully inserted in said barrel, said tubular element and hub being longitudinally movable by said stopper when said stopper is moved from said contact position to said fully inserted position in said barrel, said tubular element moving said second shield such that said annular bump passes said lip to release said second shield when said stopper is fully inserted. 18. The medical device of claim 1, wherein said barrel comprises a cylindrical barrel portion, a front cylindrical portion having a different diameter than said cylindrical barrel portion, and a transition portion between said front cylindrical portion and said cylindrical barrel portion. 19. The medical device of claim 18, wherein said releasing means comprises a tubular element arranged on said needle cannula and sealingly inserted with said needle cannula in an opening defined by said front cylindrical portion. 20. The medical device of claim 1 , wherein said first shield i3 connected on an outer surface of said front cylindrical portion. 21. The medical device of claim 20, wherein said cylindrical barrel portion is made from a plastic material. 22. The medical device of claim 20, wherein said cylindrical barrel portion is made from a glass material. 23. The medical device of claim 20, wherein said cylindrical barrel portion is made from a glass material and said front cylindrical portion is made from a plastic material. 24. The medical device of claim 20, wherein said first shield is connected to said outer surface of said front cylmdrical portion by one of a snap-fit connection, an adhesive,
29 threading, welding, and a heat stake. 25. The medical device of claim 1, wherein said forward tip of said needle shield is partially exposed when said second shield is in said first position. 26. The medical device of claim 1, wherein said forward tip of said needle shield is within said second shield when said second shield is in said first position. 27. The medical device of claim 1 , wherein said movable needle assembly comprises a needle pusher coupled to said barrel forward end and a needle cannula carried by said needle pusher and having a forward tip and a rear end in fluid communication with said reservoir.
30
PCT/US2004/034959 2003-11-03 2004-10-21 Safety device for a syringe WO2005044351A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04796023.2A EP1694389B1 (en) 2003-11-03 2004-10-21 Safety device for a syringe
JP2006539535A JP4771957B2 (en) 2003-11-03 2004-10-21 Safety device for syringe
ES04796023T ES2714558T3 (en) 2003-11-03 2004-10-21 Safety device for a syringe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/700,009 2003-11-03
US10/700,009 US7101351B2 (en) 2003-11-03 2003-11-03 Safety device for a syringe

Publications (2)

Publication Number Publication Date
WO2005044351A1 WO2005044351A1 (en) 2005-05-19
WO2005044351B1 true WO2005044351B1 (en) 2005-07-21

Family

ID=34551095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/034959 WO2005044351A1 (en) 2003-11-03 2004-10-21 Safety device for a syringe

Country Status (5)

Country Link
US (1) US7101351B2 (en)
EP (1) EP1694389B1 (en)
JP (1) JP4771957B2 (en)
ES (1) ES2714558T3 (en)
WO (1) WO2005044351A1 (en)

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JP2007510503A (en) 2007-04-26
WO2005044351A1 (en) 2005-05-19
ES2714558T3 (en) 2019-05-29
EP1694389A1 (en) 2006-08-30
JP4771957B2 (en) 2011-09-14
US20050096599A1 (en) 2005-05-05
US7101351B2 (en) 2006-09-05
EP1694389B1 (en) 2018-12-05

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