CA2059795A1 - Protective device for a needle - Google Patents
Protective device for a needleInfo
- Publication number
- CA2059795A1 CA2059795A1 CA002059795A CA2059795A CA2059795A1 CA 2059795 A1 CA2059795 A1 CA 2059795A1 CA 002059795 A CA002059795 A CA 002059795A CA 2059795 A CA2059795 A CA 2059795A CA 2059795 A1 CA2059795 A1 CA 2059795A1
- Authority
- CA
- Canada
- Prior art keywords
- needle
- blocking surface
- protective device
- hole
- tubular 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
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 36
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 15
- 238000005755 formation reaction Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 229920001821 foam rubber Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000012858 resilient material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- HSRJKNPTNIJEKV-UHFFFAOYSA-N Guaifenesin Chemical compound COC1=CC=CC=C1OCC(O)CO HSRJKNPTNIJEKV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- A61M2005/3249—Means to disalign the needle tip and the distal needle passage of a needle protection sleeve
-
- 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
- A61M2005/3256—Constructional features thereof, e.g. to improve manipulation or functioning having folding ring sections
-
- 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
- A61M2005/3267—Biased sleeves where the needle is uncovered by insertion of the needle into a patient's 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
- 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
- A61M5/3275—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel being connected to the needle hub or syringe by radially deflectable members, e.g. longitudinal slats, cords or bands
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A protective device for a needle of a syringe, catheter or the like. The device has a tubular member with bellows formations within which the needle is located. A
blocking surface at one end of the member opposes the needle point and has a hole which can be brought into register with the point to allow the needle to extends from the member.
A protective device for a needle of a syringe, catheter or the like. The device has a tubular member with bellows formations within which the needle is located. A
blocking surface at one end of the member opposes the needle point and has a hole which can be brought into register with the point to allow the needle to extends from the member.
Description
20~979~
BACKGROUND OF THE INVENTION
This invention Is concerned wlth a protectlve device ~or a needle of a syringel catheter or similar medical appliance for human or anlmal use.
SUMMARY OF THE INVENTION
The invention prov~des a protectiYe device for an elongate needle of the kind described which has a base at one end and a point at an opposing end, the device including a blocking surface and means which extends from the base and which supports the blocking surface, the blocking surface having a hole and being movable at least towards the base to allow the needle to extend through the hole.
The dev~ce may be prov~ded so that the needle is aligned with the hole, but not extending therethrough. The device is then ready for use. After use the blocking surface is brought automaUcally or manually to a position at which it opposes the needle point.
Alternativelythe device is provided with the blocking surface opposing the 26 needle point and the blocking surface ~s movable, preferably laterally, relatively to the needle point to bring the hole and the needle point into 20~979~
alignment, and thereby ready the device tor use.
The support means may take on any suitable torm and may comprlse one or more strips of material, which may be resil~ently deformable, and which extend trom the base to the blocking surface.
llle support means may alternatively include a tubular member within which the needle is located with the blocking surface at one end of the tubular member.
A disc may be located inside the tubular member and may have an aperture through which the needle extends to maintain the needle point out of register with the said hole.
16 llle tubular member may be made from a resiliently deformable and medically acceptable material such as a rubber or plastics material, foam rubber or the like, and preferably is transparent. A deformable ~iller material such as sponge rubber may be inside the tubular mernber.
Sealing means may be engaged with the tubular member to keep the needle sterile. The sealing rneans may be a dust cap, or a stopper which ~its into the hole, or the like.
The tubular member may include at least one de~ormable bellows 20S~79~
Pa~ 3 tormation which may be near the base ot the needle, or may Include a plurality ot spaced bellows formatlons ot the same or dmerent slzes.
The dev~ce may include b~as~ng means whlch acts agalnst the support means when the blocking sur~ace is moved towards the base and thereafter acts to extend the support means automatically to its initial posfflon.
The blocking surface may include a recessed format~on ~n the form of a blind or dead-end passage which may oppose or which may be moved so that it opposes the point of the needle and the hole may be formed adjacent the recessed formation. Movement of the needle towards the blocking surface thus causes the point to enter the dead-end passage.
The blocking surface is of a material which is sufficiently hard or thick to prevent penetration of the blocking surface by the poTnt. The blocking surface may include surfaces which diverge away from the hole so that when the needle extends through the hole it is completely free of the blocking surface. The recessed formation may surround the hole.
The support means preferably engages directly with the base or hub of the needle bui may engage with a syringe or other instrument with which the needle is used.
BACKGROUND OF THE INVENTION
This invention Is concerned wlth a protectlve device ~or a needle of a syringel catheter or similar medical appliance for human or anlmal use.
SUMMARY OF THE INVENTION
The invention prov~des a protectiYe device for an elongate needle of the kind described which has a base at one end and a point at an opposing end, the device including a blocking surface and means which extends from the base and which supports the blocking surface, the blocking surface having a hole and being movable at least towards the base to allow the needle to extend through the hole.
The dev~ce may be prov~ded so that the needle is aligned with the hole, but not extending therethrough. The device is then ready for use. After use the blocking surface is brought automaUcally or manually to a position at which it opposes the needle point.
Alternativelythe device is provided with the blocking surface opposing the 26 needle point and the blocking surface ~s movable, preferably laterally, relatively to the needle point to bring the hole and the needle point into 20~979~
alignment, and thereby ready the device tor use.
The support means may take on any suitable torm and may comprlse one or more strips of material, which may be resil~ently deformable, and which extend trom the base to the blocking surface.
llle support means may alternatively include a tubular member within which the needle is located with the blocking surface at one end of the tubular member.
A disc may be located inside the tubular member and may have an aperture through which the needle extends to maintain the needle point out of register with the said hole.
16 llle tubular member may be made from a resiliently deformable and medically acceptable material such as a rubber or plastics material, foam rubber or the like, and preferably is transparent. A deformable ~iller material such as sponge rubber may be inside the tubular mernber.
Sealing means may be engaged with the tubular member to keep the needle sterile. The sealing rneans may be a dust cap, or a stopper which ~its into the hole, or the like.
The tubular member may include at least one de~ormable bellows 20S~79~
Pa~ 3 tormation which may be near the base ot the needle, or may Include a plurality ot spaced bellows formatlons ot the same or dmerent slzes.
The dev~ce may include b~as~ng means whlch acts agalnst the support means when the blocking sur~ace is moved towards the base and thereafter acts to extend the support means automatically to its initial posfflon.
The blocking surface may include a recessed format~on ~n the form of a blind or dead-end passage which may oppose or which may be moved so that it opposes the point of the needle and the hole may be formed adjacent the recessed formation. Movement of the needle towards the blocking surface thus causes the point to enter the dead-end passage.
The blocking surface is of a material which is sufficiently hard or thick to prevent penetration of the blocking surface by the poTnt. The blocking surface may include surfaces which diverge away from the hole so that when the needle extends through the hole it is completely free of the blocking surface. The recessed formation may surround the hole.
The support means preferably engages directly with the base or hub of the needle bui may engage with a syringe or other instrument with which the needle is used.
2~979~
The blocking surtace may be moved laterally and twisted relatlvely to the needle to bring the hole Into reglster with the polnt or, conversely, to move the hole so that it is not al!gned with the polnt.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is further described by way of examples witS~ reference to the accompanying drawings in which:
Figures 1 to 7 are side views in cross section illustrating different embodiments of the protective device of the invention, and Figures 8 to 10 are side views in cross section respectively illustrating in enlarged detail different possible forms of construction which can be embodied in the protective device.
DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 1 illustrates one end ot a known syringe 10 which includes a plunger 12 which is adapted to expel fluid 14 of any appropriate kind through a nozzle 16 formed by a spigot 18. A stainless steel injection 20~79~
needle 20 w~th a base or hub 22 Is tr~cUonally engaged in a leakproo~
manner with the splgot 18 so tha~ the contents ol the syrlnge are, on acUvation ot the plunger, expelled through a leadlng end or point 24 ot the needle.
A protective device 26 is engaged with the syringe and comprises a housing formed trom a clear plastics material which is slightly resiliently deformable. The housing has a socket 28 with a nange 30 which engages w~h an undercut tormation 32 on the socket.
The socket 28 includes two opposed extensions 34 or, alternatively, a continuous flange 34. If manual force is exerted on the formation 34 then the socket can be moved to the left relatively to the syringe. A coil spring 36 inside the socket acts between a right hand end of the socket and an opposing end of the syringe.
The housing includes a tubular member 38 within which the needle 20 is located. At one end the member has a blocking surface 40 with a blind or dead end passage 42 and a hole 44 adjacent the passage 42. Under normal conditions the needle 20 is aligned with the dead-end passage with the point 24 at the mouth of the passage and if the device is moved to the left relatively to the syringe, the point 24 is advanced into the passage.
2~979~
Pa~e 6 When the syringe is to be used the member 38 Is detlected slighUy so that the llole 44 Is allgned wlth the needle polnt. As an Inlectlon Is glven the needle po~nt penetrates the skln o~ the reclplent. A r~actlon torce Is generated on the outer side ot the blocking surface and this causes the housing ~o move to the left relatively to the syr~nge, agalnst the bias ot the spring 36.
When the needle is withdrawn the tubular member automatically moves to the right under the action o~ the spring. The emerging needle is therefore fully and automatically enc~osed by the tubular member and the natural resilience of the tubular member re-aligns the needle point with the dead-end passage. This minimizes the likelihood of any infection being accidentally transferred via the needle.
Figure 2 shows a device with a housing 60 which has a socket 62 formed with bellows 64 which have a natural resilience resulting from their shape and material. When an injection is given and the member 38 is moved to the left the bellows are compressed. When the needle is removed from the recipient the bellows automatically expand and the tubular member 38 is moved to the right to enclose and protect the needle point.
Figure 3 illustrates a simplified device 65 which comprises a tubular member 38 made from a resilient material such as latex rubber with a 20~79~
plurality o~ spaced bellows format~ons 66. At one end the tubular member engages directly with a hub 22 ot an InJectlon or catheter needle 20. The point 24 o~ the needle l~es at the mouth o~ a dead-end passage 42 on a blocking surtace 40 at an opposing end of the tubular member. A hole 44 S is tormed adjacent the passage.
When an injection is to be given the tubular member is pulled slightly in the direction away trom the hub and is displaced laterally to align the point 24 with the hole 44. As the needle enters the recipient the member 38 is axially compressed with the formaUons 66 taking up the movement.
When the needle is withdrawn the tormations 66 automatically extend the member 38 and the needle is thereby retracted into the member 38 and the point 24 is again aligned with the passage 42.
Figure 4 shows a device 68 which is similar to the device 65 but with bellows tormations 66A, 66B, 66C and 66D which are progressively smaller so that the member 38 has a tapered or conical appearance.
Figure ~ shows a device 70 with a single bellows formation 66E and with the remainder of the tubular member 38 being of more or less constant cross section. A removable dust cap 72 encloses the outer end of the member 38 so that the needle 20 is kept in a sterile condition within the member. This tubular member is easier to make than the members of 20S979~
Figures 3 and 4. Instead of the dust cap a stopper can be plu~ged Into the hole 44 to seal the Interlor ot the tubular member.
The devices ot Figures 3 to 5 include two components whlch are secured to one another in any appropriate way, namely the member 38, and the blocking surface which is made from a relatively hard plastics material which the needle point does not readily penetrate. It is preterred to engage the tubular member with the base of the needle but it is possible to tix the member to a syringe or other device with which the needle is used.
Figure 6 shows a device 74 with a tubular member 38 of regular cross section made from a resiliently flexible material such as toam rubber. A
disc 76 is positioned inside the member and has an aperture 78 through which the needle 20 passes. The disc keeps the point 24 aligned with a dead-end passage 42 on the blocking surface 40. The member 38 can be deflected to one side so that the hole 44 is aligned with the point 24 when an injection is to be given.
The interior of the member 38 may optionally be filled with an easily compressible material 80, such as low density foam rubber, to enhance its resilience. Alternatively the resilience can be achieved from the foam rubber 80 alone and the foam rubber can be protected by means of the 2~979 ~
member 38 which can be made trom an impermeable material.
A disc, similar to the disc 76, can also be used wlth the embodlments ot Fi~ures 3 to 5.
Figure 7 shows a device 82 which is made as a one-piece plastics moulding. A ring 84 is engaged with the hub 22 of a needle 20 and at least one strip of material 86 extends from the ring to a member 88 which comprises a dead-end passage 42 and a blocking surface 40 with a hole 44 adjacent the passage 42.
The strip 86 aligns the passage 42 with the point 24. When an injection is to be given the strip is deflected laterally so that ~he point 24 is aligned with the hole 44. The member 88 is movable along the needle with the strip 86 deflecting outwardly away from the needle as an injection is given. Once the needle is withdrawn the strip 86 returns to its original position under its own resilience and the needle point is withdrawn through the hole 44 and is aligned with the passage 42.
The strip 86 or the member 38 is made from a resilient material so that the needle point is automatically protected after an injection is given. This need not necessarily be the case for the protective device can be made from a material which has a low natural resilience. The onus then rests on 20~979~
the user to cause it to extend so that the needle ~s brought to a protected position with Its polnt opposing the blocklng sur~ace, atter an InJectlon has ~een g~ven.
Figures 8, 9 and 10 illustrate in enlarged cross section dmerent torms ot construction for the blocking surface 40. In Figure 8 the blocking sur~ace is inclined to th~ axis of the needle and the hole 44 adiacent the dead-end passage is defined by a short passage 90 of circular cross section. In Figure 9 the blocking surface is also inclined to the needle but the hole 44 opens into a passage 90 of increasing cross section. In Figure 10 on the other hand the hole 44 does not lead to a passage 90 of the kind shom in Figures ~ and 9. The two latter constructions prevent the point of the needle from inadvertently snagging on the blocking surface.
With the devices of Figures 1 to 7 the point of the needle is not initially aligned with the hole, but rather with the dead-end passage. n Is possible, particularly with the embodiments of Figures 3 to 5, to provide the device with the needle point aligned with the hole 44, partly inside the passage 90, and ready for use. After an injection is given the blocking surface can be moved manually so that the needle point opposes the dead-end passage and is then protected. It has also been found that when the needle is withdrawn the compressed bellows expand to such an extent that the needle point is fully retracted from the passage 90 and the 2~S~795 Pa~e 11 resilience of the member then causes movement ot the block~ng sur~ace so that the po~nt is aligned with the dead end passage, and Is protected.
A similar effect is achleved slmply by shaklng the syrlnge - the movement extends the tubular member and the needle then moves ~nto allgnment with the dead-end passage.
The blocking surtace may be moved laterally and twisted relatlvely to the needle to bring the hole Into reglster with the polnt or, conversely, to move the hole so that it is not al!gned with the polnt.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is further described by way of examples witS~ reference to the accompanying drawings in which:
Figures 1 to 7 are side views in cross section illustrating different embodiments of the protective device of the invention, and Figures 8 to 10 are side views in cross section respectively illustrating in enlarged detail different possible forms of construction which can be embodied in the protective device.
DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 1 illustrates one end ot a known syringe 10 which includes a plunger 12 which is adapted to expel fluid 14 of any appropriate kind through a nozzle 16 formed by a spigot 18. A stainless steel injection 20~79~
needle 20 w~th a base or hub 22 Is tr~cUonally engaged in a leakproo~
manner with the splgot 18 so tha~ the contents ol the syrlnge are, on acUvation ot the plunger, expelled through a leadlng end or point 24 ot the needle.
A protective device 26 is engaged with the syringe and comprises a housing formed trom a clear plastics material which is slightly resiliently deformable. The housing has a socket 28 with a nange 30 which engages w~h an undercut tormation 32 on the socket.
The socket 28 includes two opposed extensions 34 or, alternatively, a continuous flange 34. If manual force is exerted on the formation 34 then the socket can be moved to the left relatively to the syringe. A coil spring 36 inside the socket acts between a right hand end of the socket and an opposing end of the syringe.
The housing includes a tubular member 38 within which the needle 20 is located. At one end the member has a blocking surface 40 with a blind or dead end passage 42 and a hole 44 adjacent the passage 42. Under normal conditions the needle 20 is aligned with the dead-end passage with the point 24 at the mouth of the passage and if the device is moved to the left relatively to the syringe, the point 24 is advanced into the passage.
2~979~
Pa~e 6 When the syringe is to be used the member 38 Is detlected slighUy so that the llole 44 Is allgned wlth the needle polnt. As an Inlectlon Is glven the needle po~nt penetrates the skln o~ the reclplent. A r~actlon torce Is generated on the outer side ot the blocking surface and this causes the housing ~o move to the left relatively to the syr~nge, agalnst the bias ot the spring 36.
When the needle is withdrawn the tubular member automatically moves to the right under the action o~ the spring. The emerging needle is therefore fully and automatically enc~osed by the tubular member and the natural resilience of the tubular member re-aligns the needle point with the dead-end passage. This minimizes the likelihood of any infection being accidentally transferred via the needle.
Figure 2 shows a device with a housing 60 which has a socket 62 formed with bellows 64 which have a natural resilience resulting from their shape and material. When an injection is given and the member 38 is moved to the left the bellows are compressed. When the needle is removed from the recipient the bellows automatically expand and the tubular member 38 is moved to the right to enclose and protect the needle point.
Figure 3 illustrates a simplified device 65 which comprises a tubular member 38 made from a resilient material such as latex rubber with a 20~79~
plurality o~ spaced bellows format~ons 66. At one end the tubular member engages directly with a hub 22 ot an InJectlon or catheter needle 20. The point 24 o~ the needle l~es at the mouth o~ a dead-end passage 42 on a blocking surtace 40 at an opposing end of the tubular member. A hole 44 S is tormed adjacent the passage.
When an injection is to be given the tubular member is pulled slightly in the direction away trom the hub and is displaced laterally to align the point 24 with the hole 44. As the needle enters the recipient the member 38 is axially compressed with the formaUons 66 taking up the movement.
When the needle is withdrawn the tormations 66 automatically extend the member 38 and the needle is thereby retracted into the member 38 and the point 24 is again aligned with the passage 42.
Figure 4 shows a device 68 which is similar to the device 65 but with bellows tormations 66A, 66B, 66C and 66D which are progressively smaller so that the member 38 has a tapered or conical appearance.
Figure ~ shows a device 70 with a single bellows formation 66E and with the remainder of the tubular member 38 being of more or less constant cross section. A removable dust cap 72 encloses the outer end of the member 38 so that the needle 20 is kept in a sterile condition within the member. This tubular member is easier to make than the members of 20S979~
Figures 3 and 4. Instead of the dust cap a stopper can be plu~ged Into the hole 44 to seal the Interlor ot the tubular member.
The devices ot Figures 3 to 5 include two components whlch are secured to one another in any appropriate way, namely the member 38, and the blocking surface which is made from a relatively hard plastics material which the needle point does not readily penetrate. It is preterred to engage the tubular member with the base of the needle but it is possible to tix the member to a syringe or other device with which the needle is used.
Figure 6 shows a device 74 with a tubular member 38 of regular cross section made from a resiliently flexible material such as toam rubber. A
disc 76 is positioned inside the member and has an aperture 78 through which the needle 20 passes. The disc keeps the point 24 aligned with a dead-end passage 42 on the blocking surface 40. The member 38 can be deflected to one side so that the hole 44 is aligned with the point 24 when an injection is to be given.
The interior of the member 38 may optionally be filled with an easily compressible material 80, such as low density foam rubber, to enhance its resilience. Alternatively the resilience can be achieved from the foam rubber 80 alone and the foam rubber can be protected by means of the 2~979 ~
member 38 which can be made trom an impermeable material.
A disc, similar to the disc 76, can also be used wlth the embodlments ot Fi~ures 3 to 5.
Figure 7 shows a device 82 which is made as a one-piece plastics moulding. A ring 84 is engaged with the hub 22 of a needle 20 and at least one strip of material 86 extends from the ring to a member 88 which comprises a dead-end passage 42 and a blocking surface 40 with a hole 44 adjacent the passage 42.
The strip 86 aligns the passage 42 with the point 24. When an injection is to be given the strip is deflected laterally so that ~he point 24 is aligned with the hole 44. The member 88 is movable along the needle with the strip 86 deflecting outwardly away from the needle as an injection is given. Once the needle is withdrawn the strip 86 returns to its original position under its own resilience and the needle point is withdrawn through the hole 44 and is aligned with the passage 42.
The strip 86 or the member 38 is made from a resilient material so that the needle point is automatically protected after an injection is given. This need not necessarily be the case for the protective device can be made from a material which has a low natural resilience. The onus then rests on 20~979~
the user to cause it to extend so that the needle ~s brought to a protected position with Its polnt opposing the blocklng sur~ace, atter an InJectlon has ~een g~ven.
Figures 8, 9 and 10 illustrate in enlarged cross section dmerent torms ot construction for the blocking surface 40. In Figure 8 the blocking sur~ace is inclined to th~ axis of the needle and the hole 44 adiacent the dead-end passage is defined by a short passage 90 of circular cross section. In Figure 9 the blocking surface is also inclined to the needle but the hole 44 opens into a passage 90 of increasing cross section. In Figure 10 on the other hand the hole 44 does not lead to a passage 90 of the kind shom in Figures ~ and 9. The two latter constructions prevent the point of the needle from inadvertently snagging on the blocking surface.
With the devices of Figures 1 to 7 the point of the needle is not initially aligned with the hole, but rather with the dead-end passage. n Is possible, particularly with the embodiments of Figures 3 to 5, to provide the device with the needle point aligned with the hole 44, partly inside the passage 90, and ready for use. After an injection is given the blocking surface can be moved manually so that the needle point opposes the dead-end passage and is then protected. It has also been found that when the needle is withdrawn the compressed bellows expand to such an extent that the needle point is fully retracted from the passage 90 and the 2~S~795 Pa~e 11 resilience of the member then causes movement ot the block~ng sur~ace so that the po~nt is aligned with the dead end passage, and Is protected.
A similar effect is achleved slmply by shaklng the syrlnge - the movement extends the tubular member and the needle then moves ~nto allgnment with the dead-end passage.
Claims (10)
1. A protective device for an elongate needle with a base at one end and a point at an opposing end, the device including a blocking surface and means which extends from the base and supports the blocking surface, the blocking surface having a hole and being movable at least towards the base to allow the needle to extend through the hole.
2. A protective device according to claim 1 wherein the support means comprises at least one strip of material which extends from the base to the blocking surface.
3. A protective device according to claim 1 wherein the support means includes a tubular member within which the needle is located and the blocking surface is at one end of the tubular member.
4. A protective device according to claim 3 which includes a disc which is located inside the tubular member and which is formed with an aperture through which the needle extends.
5. A protective device according to claim 3 wherein the tubular member is made from a resiliently deformable material.
6. A protective device according to claim 5 wherein the tubular member includes at least one deformable bellows formation.
7. A protective device according to claim 1 which includes biasing means which acts against the support means when the blocking surface is moved towards the base.
8. A protective device according to claim 1 wherein the blocking surface includes a recessed formation which opposes the point and the hole is formed adjacent the recessed formation.
9. A protective device according to claim 1 which is provided with the needle point aligned with the hole.
10. A protective device according to claim 1 which is provided with the needle point opposing the blocking surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA91/0444 | 1991-01-22 | ||
| ZA91444 | 1991-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2059795A1 true CA2059795A1 (en) | 1992-07-23 |
Family
ID=25580497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002059795A Abandoned CA2059795A1 (en) | 1991-01-22 | 1992-01-22 | Protective device for a needle |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPH0615002A (en) |
| AU (1) | AU1036992A (en) |
| CA (1) | CA2059795A1 (en) |
| DE (1) | DE4201228A1 (en) |
| FR (1) | FR2673107A1 (en) |
| GB (1) | GB2252046A (en) |
| IT (1) | IT1254142B (en) |
| NL (1) | NL9200110A (en) |
| SE (1) | SE9200167L (en) |
| TW (1) | TW287950B (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK0606459T3 (en) * | 1992-07-31 | 2001-08-13 | Luckhurst Anthony Henry Willia | Needle Protection Device |
| GB2270471A (en) * | 1992-09-11 | 1994-03-16 | Chuang Hsian Tzuo | Syringe with protective needle cap |
| WO1994009840A1 (en) * | 1992-10-27 | 1994-05-11 | Luigi Luke Pisaniello | Needle protection arrangement |
| FR2701848B1 (en) * | 1993-02-26 | 1995-05-05 | Daniel Guillet | Protective device for a syringe needle. |
| GB2282069A (en) * | 1993-09-22 | 1995-03-29 | Robert Christopher Guy Bracchi | The integral hypodermic needle guard |
| GB2283429B (en) * | 1993-11-04 | 1998-04-01 | David Howell Jenkins | A needle point protector |
| US5385550A (en) * | 1994-03-29 | 1995-01-31 | Su; Chan-Ho | Needle protective means for prevention against stab and virus infection |
| US5423766A (en) * | 1994-08-26 | 1995-06-13 | Becton, Dickinson And Company | Safety shield having spring tether |
| SE9403433D0 (en) * | 1994-10-10 | 1994-10-10 | Pharmacia Ab | Injection device |
| JP2668337B2 (en) * | 1994-10-19 | 1997-10-27 | 正博 松田 | Injection needle cap |
| US5879337A (en) * | 1997-02-27 | 1999-03-09 | Injectimed, Inc. | Needle tip guard for hypodermic needles |
| US6629959B2 (en) | 1996-02-27 | 2003-10-07 | Injectimed, Inc. | Needle tip guard for percutaneous entry needles |
| BR9707764A (en) * | 1996-02-27 | 2000-01-04 | Injectimed Inc | Needle tip protector for hypodermic needles. |
| GB2321014A (en) * | 1997-01-14 | 1998-07-15 | Nigel John Middleton | Hypodermic needle with retractable needle guard |
| DE19856167C1 (en) * | 1998-12-05 | 2000-05-04 | Vetter & Co Apotheker | Needle protection for e.g. syringes includes protective casing inside protective cap which remains in place during self-injection, to help assure hygiene and to hide the needle |
| NL1010885C2 (en) * | 1998-12-23 | 2000-06-26 | Michel Dirk Jan Florie | Device for shielding the free end of a hypodermic needle. |
| KR100348428B1 (en) * | 2000-02-18 | 2002-08-10 | 대한뉴팜(주) | Protectable Device for Needle of Disposal Injector for Animal |
| JP3971933B2 (en) * | 2002-02-06 | 2007-09-05 | 株式会社吉野工業所 | Syringe |
| WO2006032064A1 (en) * | 2004-09-15 | 2006-03-23 | Ratio Investments Close Corporation | Improved needle protective device |
| GB0427891D0 (en) * | 2004-12-21 | 2005-01-19 | Owen Mumford Ltd | Skin pricking apparatus |
| US20110071492A1 (en) * | 2009-09-18 | 2011-03-24 | Becton, Dickinson And Company | Hub assembly having a hidden needle for a drug delivery pen |
| FR2964571B1 (en) * | 2010-09-10 | 2013-06-21 | Mc2T | NEEDLE SECURING DEVICE FOR MEDICAL USE |
| US8764711B2 (en) | 2011-02-28 | 2014-07-01 | Injectimed, Inc. | Needle guard |
| US9238104B2 (en) | 2011-02-28 | 2016-01-19 | Injectimed, Inc. | Needle guard |
| US8414539B1 (en) | 2011-12-27 | 2013-04-09 | B. Braun Melsungen Ag | Needle tip guard for percutaneous entry needles |
| JP2014090805A (en) * | 2012-11-01 | 2014-05-19 | Otsuka Techno Kk | Needle cover, needle assembly, and syringe with needle |
| EP3073970B1 (en) * | 2013-11-22 | 2022-03-16 | Salar Surgical Ltd | Injection system |
| GB2556903A (en) * | 2016-11-24 | 2018-06-13 | Salar Surgical Ltd | Positioning device and method |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3808688A1 (en) * | 1987-03-17 | 1989-01-19 | Robert Hagen | Cannula protecting device |
| US4725267A (en) * | 1987-05-06 | 1988-02-16 | Vaillancourt Vincent L | Post-injection needle sheath |
| AU616711B2 (en) * | 1987-12-21 | 1991-11-07 | Stuart M. Dolgin | Fluid passing apparatus with means for covering the same |
| US5295963A (en) * | 1988-05-06 | 1994-03-22 | Deeks David J | Needle |
| US4935012A (en) * | 1988-06-10 | 1990-06-19 | George R. Magre | Safety device for medical needles |
| US4892521A (en) * | 1988-08-03 | 1990-01-09 | Lincoln Mills, Inc. | Protective cover for hypodermic needle |
| US4978344A (en) * | 1988-08-11 | 1990-12-18 | Dombrowski Mitchell P | Needle and catheter assembly |
| US4917679A (en) * | 1988-09-12 | 1990-04-17 | Kronner Richard F | Syringe with protective sleeve |
| US4911706A (en) * | 1988-10-14 | 1990-03-27 | Regents Of The University Of Minnesota | Automatic needle cover |
| US4955866A (en) * | 1988-10-19 | 1990-09-11 | University Of Florida | Hypodermic needle recapping device |
| US4955868A (en) * | 1988-11-28 | 1990-09-11 | Edward Klein | Disposable safety medical syringe |
| US4917672A (en) * | 1989-03-17 | 1990-04-17 | Terndrup Thomas E | Shield for an hypodermic syringe injection needle |
| EP0413872A1 (en) * | 1989-08-23 | 1991-02-27 | Jack Boisson-Müller | Protective sleeve for use with needles and syringes |
| SI8912397A (en) * | 1989-12-18 | 1997-08-31 | Tase Lazovski | Injection Syringe with a Shield |
| GB2243552A (en) * | 1990-03-21 | 1991-11-06 | Transfertec Limited | Improvements in or relating to single-use syringes |
| US5015240A (en) * | 1990-05-01 | 1991-05-14 | Ian Campbell Cree | Hypodermic needle shield |
-
1992
- 1992-01-18 DE DE4201228A patent/DE4201228A1/en not_active Withdrawn
- 1992-01-21 AU AU10369/92A patent/AU1036992A/en not_active Abandoned
- 1992-01-21 FR FR9200595A patent/FR2673107A1/en active Pending
- 1992-01-21 NL NL9200110A patent/NL9200110A/en not_active Application Discontinuation
- 1992-01-21 TW TW081100411A patent/TW287950B/zh not_active IP Right Cessation
- 1992-01-21 GB GB9201241A patent/GB2252046A/en not_active Withdrawn
- 1992-01-21 IT ITRM920047A patent/IT1254142B/en active
- 1992-01-22 JP JP4031465A patent/JPH0615002A/en active Pending
- 1992-01-22 CA CA002059795A patent/CA2059795A1/en not_active Abandoned
- 1992-01-22 SE SE9200167A patent/SE9200167L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2673107A1 (en) | 1992-08-28 |
| GB9201241D0 (en) | 1992-03-11 |
| SE9200167D0 (en) | 1992-01-22 |
| ITRM920047A1 (en) | 1993-07-21 |
| NL9200110A (en) | 1992-08-17 |
| IT1254142B (en) | 1995-09-11 |
| DE4201228A1 (en) | 1992-07-23 |
| TW287950B (en) | 1996-10-11 |
| ITRM920047A0 (en) | 1992-01-21 |
| JPH0615002A (en) | 1994-01-25 |
| SE9200167L (en) | 1992-07-23 |
| GB2252046A (en) | 1992-07-29 |
| AU1036992A (en) | 1992-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |