WO2003063935A1 - Assembly consisting of needle and means for supporting it and connecting it to a syringe - Google Patents

Assembly consisting of needle and means for supporting it and connecting it to a syringe Download PDF

Info

Publication number
WO2003063935A1
WO2003063935A1 PCT/IB2002/005321 IB0205321W WO03063935A1 WO 2003063935 A1 WO2003063935 A1 WO 2003063935A1 IB 0205321 W IB0205321 W IB 0205321W WO 03063935 A1 WO03063935 A1 WO 03063935A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
syringe
housing
supporting
discoidal body
Prior art date
Application number
PCT/IB2002/005321
Other languages
French (fr)
Inventor
Michael Jemec
Original Assignee
Michael Jemec
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 Michael Jemec filed Critical Michael Jemec
Publication of WO2003063935A1 publication Critical patent/WO2003063935A1/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
    • A61M5/3287—Accessories for bringing the needle into the body; Automatic needle insertion
    • 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
    • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • A61M5/285—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened
    • A61M5/286—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened upon internal pressure increase, e.g. pierced or burst
    • 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
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3232—Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means

Definitions

  • the present invention relates to the field of instruments for medical use, and particularly the area concerned with assemblies comprising needles with means for supporting them and connecting them to a "pen"-type syringe for injections (generally subcutaneous) or for punctures for taking blood samples from the capillaries.
  • these assemblies are fixed, and are attached with the needles projecting out of the syringe.
  • an assembly consisting of a needle and supporting and connecting means in which the needle, held in position by elastic means, is entirely contained within a housing that can be connected to the end of a syringe.
  • an assembly 21 is essentially made up of a cylindrical housing 2, inside the cavity 2c of which there slides a discoidal body 3, embedded perpendicularly in the centre of which is a needle 1 of axially hollow type for subcutaneous injections.
  • the said housing 2 terminates at the end 2f nearest the tip P of the needle 1 in an end wall 5 with a central hole 5f for the said needle 1 to pass through.
  • elastic means consisting in this case of a helical spring 4 coaxial with the needle 1 which, when no force is being applied to them by the discoidal body 3, keep this discoidal body 3 in a position such that the needle 1, the length 1 of which is less than the axial length L of the said cavity 2c, is entirely contained within it, in other words inside the housing 2.
  • the needle 1 projects from both sides of the discoidal body 3, and also its opposite end Q from the tip P is sharpened so that it can penetrate by known methods through the seal 12g of the cartridge 12 of the liquid to be injected, which seal is pressed against it by the syringe 8, is penetrated by it and comes up against the discoidal body 3, which it then pushes (arrow F) as already explained against the spring 4 and causes the needle 1 to project out of the end wall 5, as indicated in broken lines.
  • the cartridge 12 is drawn back into the syringe 8 (arrow R) , removing the force from the discoidal body 3 which, due to the elastic return of the spring 4, moves back to its initial position in which the needle 1 is once again entirely contained within the housing 2. Consequently the needle 1 projects from the housing 2 only while an injection is being carried out, thus accomplishing the objects which the inventor had set himself.
  • the operation of the assembly 22 shown in Figure 2 is exactly the same as described above regarding the previous illustrative embodiment: in this case, however, the discoidal body 3 is connected to a solid needle 11 for taking capillary samples, this needle being embedded in it in such a way that it only projects from the side facing the end wall 5.
  • this plunger 13 passes into the space 6 and pushes the discoidal body 3 until the needle 11 is extending out of the housing 2 through the central hole 5f in the end wall 5 (as shown by the broken lines), compressing a spring 4 which later, once the sample has been taken and the plunger 13 pulled back again, exerts its elastic return action to move the discoidal body 3 and the embedded needle 11 into the cavity 2c inside the housing 2.
  • a housing of an assembly according to the invention may be selected from those known to those skilled in the art for similar applications; in the examples depicted here, these means consist simply of a threaded portion 20 on the end 2e of the housing 2 that screws into a similarly threaded part on the end of the barrel of the syringe.
  • these means consist simply of a threaded portion 20 on the end 2e of the housing 2 that screws into a similarly threaded part on the end of the barrel of the syringe.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A description is given of an assembly (21) consisting of needle (1) and means (2) for supporting it and connecting it to a 'pen'-type syringe (8), for injections or for punctures for capillary samples, in which assembly the said supporting and connecting means consist of a cylindrical housing (2), inside the cavity (2c) of which there slides a discoidal body (3), in the centre of which the needle (1) is embedded perpendicularly, this body resting against elastic means (4) which are housed in the same cavity (2c) and which, when not under any force, keep the said needle (1) entirely contained inside the housing (2), the latter possessing at one end (2e) means for connecting it reversibly to the syringe, and at the other end (2f) an end wall (5) with a central hole (5f) to allow the said needle (1) to pass through it and out of the housing (2), when pressure is applied to the abovementioned elastic means (4) via the discoidal body (3).

Description

Assembly consisting of needle and means for supporting it and connecting it to a syringe
The present invention relates to the field of instruments for medical use, and particularly the area concerned with assemblies comprising needles with means for supporting them and connecting them to a "pen"-type syringe for injections (generally subcutaneous) or for punctures for taking blood samples from the capillaries.
In the present state of the art, these assemblies are fixed, and are attached with the needles projecting out of the syringe.
This immediately carries the risk of accidental needle sticks and the consequent possibility of picking up various kinds of infective pathologies. It also has the drawback of heightening the tension of a patient by the exposure of the needle about to be used to carry out an injection or form a puncture for a capillary sample.
To avoid both of these problems the inventor of the present invention has devised an assembly consisting of a needle and supporting and connecting means in which the needle, held in position by elastic means, is entirely contained within a housing that can be connected to the end of a syringe.
It is only when the syringe is actuated that the said elastic means are compressed and allow the needle to extend out of the housing. On completion of the injection or puncture, the same elastic means cause, by their elastic return, total retraction of the needle into the housing.
The subject of the present invention thus consists of an assembly as described in the appended Claim 1. A more detailed description will now be given of two preferred illustrative embodiments, in the course of which reference will also be made to the attached drawings, which show: - in Figure 1 a longitudinal section through an illustrative embodiment of an assembly of the invention in the case in which the needle is suitable for carrying out injections; and - in Figure 2 a longitudinal section through another illustrative embodiment in the case in which the needle is of the type suitable for capillary samples .
Beginning with Figure 1, it can be seen here that an assembly 21 according to the invention is essentially made up of a cylindrical housing 2, inside the cavity 2c of which there slides a discoidal body 3, embedded perpendicularly in the centre of which is a needle 1 of axially hollow type for subcutaneous injections.
The said housing 2 terminates at the end 2f nearest the tip P of the needle 1 in an end wall 5 with a central hole 5f for the said needle 1 to pass through. Between the said end wall 5 and the discoidal body 3 are elastic means, consisting in this case of a helical spring 4 coaxial with the needle 1 which, when no force is being applied to them by the discoidal body 3, keep this discoidal body 3 in a position such that the needle 1, the length 1 of which is less than the axial length L of the said cavity 2c, is entirely contained within it, in other words inside the housing 2.
The needle 1 projects from both sides of the discoidal body 3, and also its opposite end Q from the tip P is sharpened so that it can penetrate by known methods through the seal 12g of the cartridge 12 of the liquid to be injected, which seal is pressed against it by the syringe 8, is penetrated by it and comes up against the discoidal body 3, which it then pushes (arrow F) as already explained against the spring 4 and causes the needle 1 to project out of the end wall 5, as indicated in broken lines.
Once the injection is finished, the cartridge 12 is drawn back into the syringe 8 (arrow R) , removing the force from the discoidal body 3 which, due to the elastic return of the spring 4, moves back to its initial position in which the needle 1 is once again entirely contained within the housing 2. Consequently the needle 1 projects from the housing 2 only while an injection is being carried out, thus accomplishing the objects which the inventor had set himself.
It should be pointed out that, obviously, a space 6 is provided at the opposite end 2e of the housing 2 from the end 2f with the end wall 5, sufficient to let the cartridge 12 enter and carry out the operations described above.
The operation of the assembly 22 shown in Figure 2 is exactly the same as described above regarding the previous illustrative embodiment: in this case, however, the discoidal body 3 is connected to a solid needle 11 for taking capillary samples, this needle being embedded in it in such a way that it only projects from the side facing the end wall 5.
This is due to the fact that, in this case, the discoidal body 3 is pushed by a simple plunger 13 of known type, which does not contain a liquid to be injected, and which therefore does not need to be perforated.
In much the same way as above, when a sample is to be taken, this plunger 13 passes into the space 6 and pushes the discoidal body 3 until the needle 11 is extending out of the housing 2 through the central hole 5f in the end wall 5 (as shown by the broken lines), compressing a spring 4 which later, once the sample has been taken and the plunger 13 pulled back again, exerts its elastic return action to move the discoidal body 3 and the embedded needle 11 into the cavity 2c inside the housing 2.
It is possible to make other embodiments of an assembly according to the invention that differ from those considered thus far as regards for example the shape and dimensions of the parts and the type of elastic means 4.
Finally, as regards the means of connection between a housing of an assembly according to the invention and the associated syringe, these may be selected from those known to those skilled in the art for similar applications; in the examples depicted here, these means consist simply of a threaded portion 20 on the end 2e of the housing 2 that screws into a similarly threaded part on the end of the barrel of the syringe. However, it is also possible to use a bayonet-type coupling or other similar couplings.

Claims

Claims
1. Assembly (21, 22) consisting of needle (1, 11) and means (2) for supporting it and connecting it to a "pen"-type syringe (8), for injections or for punctures for capillary samples, the assembly being characterized in that the said supporting and connecting means consist of a cylindrical housing (2), inside the cavity (2c) of which there slides a discoidal body (3), in the centre of which the said needle (1, 11) is embedded perpendicularly, this body resting against elastic means (4) which are housed in the same cavity (2c) and which, when not under any force, keep the said needle (1, 11) entirely contained inside the housing (2), the latter possessing at one end (2e) means for connecting it reversibly to the syringe, and at the other end (2f) an end wall (5) with a central hole (5f) to allow the said needle (1, 11) to pass through it and out of the housing (2), when pressure is applied to the abovementioned elastic means (4) via the said discoidal body ( 3 ) .
2. Assembly according to Claim 1, in which the said needle (1) is axially hollow, and projects from both sides of the discoidal body (3) in which it is centrally embedded.
3. Assembly according to Claim 1, in which the said needle (11) is solid and projects from the said discoidal body (3) only on the side facing the said end wall (5).
4. Assembly according to one of the preceding claims, in which the said housing (2) comprises, on the end (2e) facing the syringe, a space (6) for the passage of a member (12, 13) which, when actuated by the syringe, pushes the said discoidal body (3) so that the needle (1, 11) passes out through the central hole (5f) of the end wall (5) .
PCT/IB2002/005321 2002-02-01 2002-12-12 Assembly consisting of needle and means for supporting it and connecting it to a syringe WO2003063935A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1742002 2002-02-01
CH0174/02 2002-02-01

Publications (1)

Publication Number Publication Date
WO2003063935A1 true WO2003063935A1 (en) 2003-08-07

Family

ID=27626684

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/005321 WO2003063935A1 (en) 2002-02-01 2002-12-12 Assembly consisting of needle and means for supporting it and connecting it to a syringe

Country Status (1)

Country Link
WO (1) WO2003063935A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5695472A (en) * 1993-05-27 1997-12-09 Washington Biotech Corporation Modular automatic or manual emergency medicine injection system
WO2000009186A2 (en) * 1998-08-11 2000-02-24 Medi-Ject Corporation Needle assisted jet injector
WO2001047586A1 (en) * 1999-12-23 2001-07-05 Arnold Neracher Injection device and propulsion system therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5695472A (en) * 1993-05-27 1997-12-09 Washington Biotech Corporation Modular automatic or manual emergency medicine injection system
WO2000009186A2 (en) * 1998-08-11 2000-02-24 Medi-Ject Corporation Needle assisted jet injector
WO2001047586A1 (en) * 1999-12-23 2001-07-05 Arnold Neracher Injection device and propulsion system therefor

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