WO1997002854A1 - Seringue de securite pour operations de prelevement - Google Patents

Seringue de securite pour operations de prelevement Download PDF

Info

Publication number
WO1997002854A1
WO1997002854A1 PCT/EP1996/002992 EP9602992W WO9702854A1 WO 1997002854 A1 WO1997002854 A1 WO 1997002854A1 EP 9602992 W EP9602992 W EP 9602992W WO 9702854 A1 WO9702854 A1 WO 9702854A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
syringe
sleeve
head
spout
Prior art date
Application number
PCT/EP1996/002992
Other languages
English (en)
Inventor
Nardino Righi
Roberto Rossi
Original Assignee
Nardino Righi
Roberto Rossi
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 Nardino Righi, Roberto Rossi filed Critical Nardino Righi
Priority to AU66128/96A priority Critical patent/AU6612896A/en
Publication of WO1997002854A1 publication Critical patent/WO1997002854A1/fr

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
    • 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
    • A61M2005/3253—Constructional features thereof, e.g. to improve manipulation or functioning disconnecting the needle hub from the syringe barrel during removal of the sleeve from the syringe barrel
    • 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
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M2005/342—Off-center needles, i.e. needle connections not being coaxial with the longitudinal symmetry axis of syringe barrel

Definitions

  • the invention relates to a safety syringe for drawing, particularly for blood drawing operations, comprising a needle which is disengageably fitted on a needle-carrying spout, so that it can be removed after the drawing, to allow for transfer into other containers for the liquid drawn.
  • the invention aims at producing a syringe of the type as specified, through which, thanks to easy and cheap expedients, the above drawbacks may be obviated, allowing for an easy transfer of the liquid drawn from the syringe into the containers, without exposing the personnel to injury risks and thus to infection by pathogenic and highly dangerous viruses, germs or bacteria.
  • the invention achieves these purposes with a syringe for drawing operations of the type as specified, which is provided with means for grasping/extracting the needle from the spout of the syringe, these means forming, at least at the moment and in the course of extraction, a protective container, entirely covering the needle, which does not project outwards on any side.
  • the grasping/extracting means comprise a cylindrical sleeve, which is fitted so as to be coaxially slidable on the barrel of the syringe, and as to be extracted therefrom, from the needle end and in the direction of extraction of the needle from the needle-carrying spout, the said sleeve being provided with automatic means for hooking the needle and dragging it in the said direction of extraction from the needle-carrying spout, the said hooking means being automatically driven in this sense while the sleeve itself is extracted from the barrel of the syringe.
  • Advantages may be drawn from shaping the sleeve in such a manner that, while at rest, it is disposed in a retracted position, covering the body of the syringe, but not the needle.
  • the automatic means for hooking the needle are provided in such a position that the sleeve drags the needle in the sense of extration only when this is completely covered by the sleeve, and not protruding from the latter.
  • the sleeve In cooperation with the automatic hooking means, the sleeve also has automatic means for axial locking, in the two opposite relative directions of the needle within the sleeve itself, the said axial locking means being driven when the needle is extracted.
  • the axial locking means are made of the said hooking means, for the needle sliding in the direction of the sleeve, whereas for the opposite sliding direction, they are made of axial wards automatically released when the needle is engaged.
  • the needle is fitted on a needle head, whose shape is complementary to the needle end of the syringe, and whose fastening is made through forcing thereon, the said head being supplied, coincident with the needle- carrying spout of the syringe, with an aperture through which the needle engages with the spout itself, while the automatic means for hooking the needle and for axially locking it cooperate with the said needle head.
  • the needle is locked within the sleeve, which, thanks to its larger size, allows for a safe and easy grasping of the needle itself.
  • the protecting sleeve forms at least a portion of an effective disposable container, for throwing the needle away and preventing it from being dangerous.
  • the particular construction of the invention may be easily adapted to existing and ordinary syringes, without demanding a redesign of the latter, only by fitting the needle on the needle head, instead of fitting it directly on the needle-carrying spout, as in ordinary syringes, and by fitting the extractable protective sleeve, with the relevant automatic hooking means on the barrel of the syringe.
  • the invention also relates to other characteristics, for further improvement of the syringe, which form the subject of the dependent claims.
  • Fig. 1 shows an axial section of a syringe according to the invention, with the sleeve for grasping/extracting the needle in its rest position, that is in a retracted position over the barrel of the syringe itself.
  • Fig. 2 is a partially sectional view of the syringe according to fig. 1, with the sleeve for grasping/extracting the needle in its engaging position, with the needle immediately before its extraction from the syringe.
  • Fig. 3 is a side view of the sleeve extracted from the barrel of the syringe, with the needle therein, constrained to it with respect to a mutual axial movement.
  • Fig. 4 shows a magnified axial section of a needle head, which may be matched by forcing and in a removable manner to the needle end of the syringe itself.
  • Figs. 5 and 6 are an axial section and a side view of the sleeve for grasping/extracting the needle in two different angular positions turned by 90° from each other respectively.
  • a drawing syringe comprises a barrel 1, in which, a plunger 2, carried on the inner end of a stem 3, is fitted slidably, through an open end. From the closed end of the barrel 1, in an excentric position with respect to it, a spout 101, communicating with the inside of the barrel 1 extends axially, for seal engagement through forcing, in a removable manner, of a matching end 104 of the needle 4, which is made as a cone- or truncated cone-shaped bell, whose shape is complementary to the spout 101 of the needle 4.
  • the needle 4 is housed within a cap 5, which is disengagebly fitted by forcing or friction on the end of the matching bell 104.
  • the needle 4 is not fitted directly on the spout 101 of the barrel 1 of the syringe, but through a needle head 6, which is disengageably fastened, by a predetermined force, to the the barrel 1 of the syringe, on the needle 4 end.
  • the needle head 6 is shaped like a cap and has at least one cylindrical length 106 partially covering the corresponding terminal portion of the barrel 1 of the syringe.
  • the inside diameter of the said cylindrical length 106 has a size which allows for its engagement through forcing with the barrel of the syringe and for its locking thereon in a removable manner, by a predetermined force.
  • the cylindrical length 106 is closed by an intermediate transverse wall 206, with a shape meant to be complementary to the corresponding end of the barrel 1 of the syringe, particularly a cone shape, and which strikes against the said end when it is fitted on the barrel 1 of the syringe.
  • the transverse wall 206 has an aperture 306, coincident with the excentric spout 101 for fitting the needle 4, intended for coupling to the said spout 101.
  • the latter protrudes freely coaxially inside a cylindrical tubular element 406, which is coincident with the said aperture 206.
  • the tubular element 406 has means for fastening the needle 4, particularly fastening means cooperating with the matching bell 104, associated to the needle 4. These means are made in such a way that, when the needle head 6 is fitted on the barrel 1 of the syringe, the needle 4, fastened to the needle head 6 itself is simultaneously inserted and sealed, with its matching bell 104, on the spout 101 of the syringe (figs 1, 2) .
  • the matching bell 104 of the needle 4 has, at its free end, an annular flange 204, whereas the cylindrical tubular element 406 of the needle head 6 has an internal thread, particularly multi-start, for engagement of the annular flange 204 of the needle 4.
  • the tubular element 406 for fastening the needle 4 also extends on the inner side of the transverse wall 206, with a length whose diameter is such as to be slightly forced and sealed, at least on its end, on the needle-carrying spout 101, thus forming another sealing area.
  • the tubular element 406 for fastening the needle 4 is disposed excentrically and in an inner radial position with respect to the wall of the cylindrical length 106 of the needle head 6.
  • a cylindrical tubular sleeve 7 is caused to slide, whose length is greater than the comprehensive length of the needle 4 and the needle head 6.
  • the sleeve 7 is slidable on the barrel 1 of the syringe and has means for engagement with the needle head 6, comprising at least one, preferably two inner radial shoulders 107, provided at the rear end of the sleeve, for engagement on the rear side, with respect to the direction of extraction of the sleeve 7, with an opposite radial annular shoulder at the rear end of the needle head 6.
  • the annular, radial, inner shoulders 107 of the extractable sleeve 7 strike against the edge 506 of the rear end of the needle head 6, when this is forced onto the end of the barrel of the syringe 1.
  • the inside diameter of the extractable sleeve 7 is obviously larger than that of the barrel of the syringe 1, and their difference substantially corresponds to, and is preferably slightly higher than the outer diameter of the cylindrical length 106 of the needle head 6.
  • the extractable sleeve 7 can therefore have an idle position, in which it covers the barrel 1 of the syringe, while, at the end of the drawing operation, it may be made to slide for extraction through the barrel of the syringe in the direction of the needle 4 end.
  • the sleeve 7 When the sleeve 7 is in a position almost entirely extracted form the barrel 1 of the syringe, it engages on the rear side the needle head 6, which is thus extracted by a certain force from the barrel of the syringe simultanuously to the extraction of the sleeve 7 from the syringe itself.
  • the needle head 6 In order to lock the needle head 6 together with the needle, within the extractable sleeve 7, with respect to an axial movement in the two opposed directions, that is also in the direction of the fore end of the sleeve 7, the latter has, at a suitable distance from the radial, inner, rear shoulders 107, opposed radial inner teeth 207, cooperating with wards 606 at the fore end of the needle head 6.
  • the front radial teeth 207 are made to be elastically retractable in the rest position, to allow for passing beyond the needle head 6 while extracting the sleeve 7.
  • the teeth 207 are supported on the radially inner side, by axial elastic tongues 307, preferably integral with the sleeve 7 itself, thanks to a U-shaped notch made on the wall of the sleeve itself.
  • the radial teeth 207 may be shaped as saw-teeth, with the steep side facing the rear end of the sleeve 7, that is the hooking means 107, and with the side inclined as a guide surface, facing the fore end of the syringe.
  • the radial front teeth 207 cooperate with the front peripheral edge 606 of the cylindrical element 106 which forms the needle head 6, and in order to lock effectively and in a removable manner the needle head 6 within the extractable sleeve 7, their distance from the rear inner radial shoulders 107 is such as to correspond substantially to the axial length of the cylindrical element 106 of the needle head 6, that is to the axial distance between the two opposed edges 506 and 606 of the head itself.
  • the front and the rear teeth 207, 107 are disposed in the area of the rear end of the extractable sleeve 7, and thus, as fig. 3 clearly shows, after the extraction of the sleeve 7 together with the needle head 6, the needle 4 is completely covered by the sleeve.
  • the sleeve 7 has a removable ward 407, thanks to which it is retained in such a way as to be be easily released in the rest position.
  • This removable ward advantageously comprises one or more radial inner projections 407, which have a transverse rounded section and protrude inside the sleeve 7 to such an extent as to form a removable retainer for the sleeve 7, in the retracted position on the barrel 1 of the syringe, the said retainer cooperating with the upper edge 506 of the needle head 6.
  • the projections 407 are disposed on the free end of axial tongues 507, which are integral with the sleeve 7, like the tongues 307 of the radial inner teeth 207. Thanks to the flexibility of the tongues 507 and to the rounded shape of the projections 407, the rear edge 506 of the needle head 6 can be automatically passed beyond, by exerting a slight axial pushing force of the sleeve in the direction of extraction, a force which is feebler than that which is necessary for extracting the needle head 6.
  • the rear radial shoulders 107 are formed by the axial inner ends of stationary radial ribs, which are provided at the rear end of the sleeve 7, and are elements for spacing and centering the sleeve with respect to the barrel 1 of the syringe and to the needle head 6, as they have a radial extension which substantially corresponds to or is slightly greater than the thickness of the cylindrical wall 106 of the needle head 6.
  • this function is performed by the projections 407 and by the teeth 207, and, during the extraction of the sleeve, up to the hooking of the needle head 6, also by the cylindrical portion 106 of the needle head itself.
  • the outer surface of the sleeve 7, on its rear end, is ribbed knurled or otherwise shaped in such a way as to avoid slipping.
  • the illustrated embodiment is designed in such a way as to allow for a conversion of prior art syringes, without the said devices.
  • the needle head 6 By shaping the needle head 6 so as to be complementary to the said syringes and by ensuring proper dimensions for the needle head itself and for the sleeve 7, the latter may be applied to conventional syringes in an easy and fast manner, thus merely forming an accessory kit for integration thereto, even separately sold.

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)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Seringue de sécurité pour opérations de prélèvement, en particulier pour le prélèvement de sang, qui comporte une aiguille (4), raccordée de manière détachable (104) à un embout (101) porteur d'aiguille afin de pouvoir être enlevée après le prélèvement, en vue du transfert du liquide dans d'autres récipients. Selon la présente invention, pour permettre l'extraction de l'aiguille (4) sans risque de blessure pour le personnel soignant, ladite seringue possède un dispositif (7) qui permet de saisir/extraire l'aiguille (4) de l'embout (101) de la seringue et qui, au moins au moment de l'extraction, forme une enveloppe de protection recouvrant entièrement l'aiguille (4), placée dans ladite enveloppe en position rentrée, sans faire saillie vers l'extérieur sur aucun côté. La présente invention concerne un mode de réalisation particulièrement approprié pour la modification/intégration de seringues de prélèvement existantes.
PCT/EP1996/002992 1995-07-11 1996-07-09 Seringue de securite pour operations de prelevement WO1997002854A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66128/96A AU6612896A (en) 1995-07-11 1996-07-09 Safety syringe for drawing operations

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95GE000076A IT1281222B1 (it) 1995-07-11 1995-07-11 Siringa di sicurezza per prelievi.
ITGE95A000076 1995-07-11

Publications (1)

Publication Number Publication Date
WO1997002854A1 true WO1997002854A1 (fr) 1997-01-30

Family

ID=11354774

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/002992 WO1997002854A1 (fr) 1995-07-11 1996-07-09 Seringue de securite pour operations de prelevement

Country Status (3)

Country Link
AU (1) AU6612896A (fr)
IT (1) IT1281222B1 (fr)
WO (1) WO1997002854A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037345A1 (fr) * 1998-01-20 1999-07-29 Sergio Restelli Seringue de securite jetable
EP1291030A1 (fr) * 2001-09-10 2003-03-12 Sergio Restelli Accessoire de sécurité pour seringue hypodermique
GB2520080A (en) * 2013-11-11 2015-05-13 Poole Hospital Nhs Foundation Trust Apparatus for transferring fluid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737144A (en) * 1987-03-09 1988-04-12 Choksi Pradip V Syringe with selectively exposed and enveloped needle
WO1992021393A1 (fr) * 1991-05-26 1992-12-10 Arturo Moises Gotthelf Dispositif de securite pour seringue medicale
US5207646A (en) * 1988-06-30 1993-05-04 Marc Brunel Single use shieldable hypodermic syringe with a reusable handle
US5328485A (en) * 1992-08-20 1994-07-12 Saul Moreno Disposable syringe with needle cover
US5342309A (en) * 1993-03-05 1994-08-30 Becton, Dickinson And Company Syringe having safety shield

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737144A (en) * 1987-03-09 1988-04-12 Choksi Pradip V Syringe with selectively exposed and enveloped needle
US5207646A (en) * 1988-06-30 1993-05-04 Marc Brunel Single use shieldable hypodermic syringe with a reusable handle
WO1992021393A1 (fr) * 1991-05-26 1992-12-10 Arturo Moises Gotthelf Dispositif de securite pour seringue medicale
US5328485A (en) * 1992-08-20 1994-07-12 Saul Moreno Disposable syringe with needle cover
US5342309A (en) * 1993-03-05 1994-08-30 Becton, Dickinson And Company Syringe having safety shield

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037345A1 (fr) * 1998-01-20 1999-07-29 Sergio Restelli Seringue de securite jetable
EP1291030A1 (fr) * 2001-09-10 2003-03-12 Sergio Restelli Accessoire de sécurité pour seringue hypodermique
GB2520080A (en) * 2013-11-11 2015-05-13 Poole Hospital Nhs Foundation Trust Apparatus for transferring fluid

Also Published As

Publication number Publication date
IT1281222B1 (it) 1998-02-17
ITGE950076A1 (it) 1997-01-11
ITGE950076A0 (it) 1995-07-11
AU6612896A (en) 1997-02-10

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