EP1385565A1 - Dispositif de protection de canules - Google Patents

Dispositif de protection de canules

Info

Publication number
EP1385565A1
EP1385565A1 EP02740305A EP02740305A EP1385565A1 EP 1385565 A1 EP1385565 A1 EP 1385565A1 EP 02740305 A EP02740305 A EP 02740305A EP 02740305 A EP02740305 A EP 02740305A EP 1385565 A1 EP1385565 A1 EP 1385565A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
shaped section
cannula
protection device
attachment
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.)
Withdrawn
Application number
EP02740305A
Other languages
German (de)
English (en)
Inventor
Herwig Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1385565A1 publication Critical patent/EP1385565A1/fr
Withdrawn legal-status Critical Current

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
    • A61M5/3275—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
    • 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
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps

Definitions

  • the invention relates to a protective device for cannulas with an end-side conical attachment, which can be attached to a correspondingly adapted conical attachment of a syringe.
  • syringes For the injection of active substances, syringes are used which uniformly have a plunger which is guided in a cylinder, the front end face of which has a centrally or laterally arranged conical attachment, over which the inner cone of a push-on attachment, in which a metallic cannula is held, can be pushed.
  • syringes are widely used as so-called disposable syringes, which are disposed of after their intended use.
  • the cannulas with an attachment piece which are welded in sterile packaging, are usually secured by a protective cap, which is a quiver-shaped sleeve that is open on one side, the inner jacket of which is designed towards the open end so that it can be slid over the outer jacket of the conical plug-on attachment , The doctor and the medical auxiliary personnel are thus protected when the cannula is removed and when the cannula attachment piece is placed on the cylinder attachment.
  • the protective cap Only after the conical attachment attachment is attached to the attachment of the syringe is the protective cap removed, after which an active ingredient to be injected can be applied and then administered subcutaneously, intravenously or intramuscularly, or the patient's own fluid, usually blood, is removed from the patient using the syringe.
  • the cap In order to protect against puncture injuries after use, the cap is often put back onto the front end of the cannula, after which the plug-on attachment of the cannula is detached from the syringe barrel and the cannula covered by the protective cap is disposed of.
  • the protective cap is made of plastic and is designed so that it does not buckle or release the tip of the cannula even under high loads can.
  • due to the small inner diameter of the protective cap there is a risk that the ground end of the cannula will be passed sideways, whereby there is a considerable risk of injury with a high risk of infection.
  • the proposal has therefore been made to couple the cannula to the piston pushed forward and then to pull the cannula into the interior of the empty cylinder.
  • this requires complicated coupling mechanisms that not only make the end product considerably more expensive, but also make the syringes more difficult to use after use, but at least require special care and skill when coupling the cannula attachment to the piston.
  • it has been proposed to arrange a longitudinally axially displaceable sleeve around the syringe barrel, which can be moved forward and locked after use of the syringe, so that the ground cannula end is covered all around.
  • the protective device which is characterized in that a sleeve-shaped section is fastened to the push-on attachment, which can be guided for tensile loading into an end position in which the sleeve-shaped section covers the cannula tip all around.
  • the sleeve-shaped section is connected to the conical attachment attachment via a predetermined breaking point.
  • the predetermined breaking point consists of a thin-walled ring piece as Lanyard between the conical attachment and the sleeve-shaped section.
  • the sleeve-shaped section can also be pushed onto the push-on attachment, so that it can be removed after the frictional force has been overcome. This can be ensured, for example, by means of a mutual frictional conical surface system. It is crucial that the sleeve-shaped section does not interfere with the injection or removal of the body's own fluids and that a sufficient cannula length is left free from the ground tip. After loosening the frictional connection or opening the predetermined breaking point, the sleeve-shaped section is pulled "to the front" in order to securely cover the tip.
  • a holding means is preferably fastened between the sleeve-shaped section and the push-on attachment, which in particular can be a thread or a cord, the length of which corresponds approximately to the distance by which the sleeve-shaped section can be moved away from the push-on attachment into the end position.
  • the maximum possible elongation of the thread thus serves as a stop with which the sleeve-shaped section is brought into the desired position.
  • a sleeve-shaped protective cap which has lateral slots of a width extending from its open push-on end, which allow the holding means to be passed through. If, for example, two cords fastened diametrically opposite one another are used, the slots of the protective cap are also arranged diametrically opposite one another, so that the cords can be carried out here. In principle, one holding means, ie a thread or a cord, would suffice, but two holding means create increased safety, in which the breaking of a thread is taken into account.
  • the push-on attachment acts less stably against lateral bending loads in the case of two (or more) slots
  • the push-on attachment preferably has at least two external tongues which can be inserted into correspondingly designed pockets arranged on the protective cap at the open end.
  • the sleeve-shaped section is firmly connected to the push-on attachment and can be flexibly extended inelastically in such a way that the tip of the cannula, which is exposed briefly before and after the intended use, after the body's own liquid has been removed or after the active substance has been injected through the sleeve-shaped one Section can be covered all around.
  • the sleeve-shaped section can be designed as a bellows over at least a portion of its length and thus provide the necessary extension.
  • the sleeve-shaped section can also be designed as a small-diameter, extendable telescope.
  • the sleeve-shaped section is preferably flexible and consists of a material that is stable enough to effectively prevent piercing with the needle. If the sleeve-shaped section is pulled over the tip of the cannula, the flexible design leads to a slight deflection from the longitudinal axis, so that the ground end of the cannula, in particular the very sharp tip, bores into the plastic inner jacket of the sleeve-shaped section and thus the section slides back. where the tip would be released is effectively prevented.
  • a sleeve-shaped protective cap is provided for the cannula, which can be plugged onto the free end of the sleeve-shaped section, for example by creating a conical jacket connection.
  • the sleeve-shaped section has tentacle-like extensions which, in the original state, ie before the intended use of the cannula approximately at the level of the exposed cannula tip, preferably projecting slightly beyond the cannula tip, and which are designed as actuating means for applying the tensile load.
  • This can be plastic cords or act as flat profile extensions, which are elastic or flexible, but flexible, so that they do not hinder the actual injection or blood collection process.
  • These tentacle-like extensions represent a handling aid that must be used.
  • a swab is usually used before the puncture wound is taped off, which is then applied to the puncture site by the doctor or medical assistant (nurse, nurse, etc.) by pulling out the cannula.
  • the doctor or medical assistant nourse, nurse, etc.
  • the tentacle-like extensions there are grasped, so that when the syringe is moved away, the sleeve-shaped section is inevitably pulled over the tip of the cannula. At this point, the tentacle-like extensions have served their purpose.
  • the strength of the tentacle-like extensions or their tensile strength does not have to be too great, since they only have to transmit the tensile load to slip over the sleeve-shaped section along the cannula.
  • the tentacle-shaped extensions are arranged relative to the cannula tip, for example at a distance of 5 mm, so that these extensions (left and / or right) are grasped when a swab is placed on the puncture site.
  • the push-on attachment and the syringe attachment are rotationally asymmetrical.
  • the sleeve-shaped section preferably has tongue-shaped spring elements fastened on one side in the inner jacket, which can be sunk into pockets when the section is moved into the end position covering the cannula tip, but form a blocking resistance when the section is moved in the opposite direction.
  • Such "barbs" are known, for example, on the outer surface of dowels for receiving screws. In the present case, however, the spring elements are not effective radially outwards, but radially inwards.
  • the sleeve-shaped section has annular niches at its end in the inner jacket, into which the cannula tip is inserted when the sleeve-shaped section is returned and thus inhibits a further returning movement.
  • FIG. 1 and 2 each show a first embodiment of the invention before and after the intended use of the syringe in a partially cut, perspective view
  • Fig. 3 is a perspective view of another invention
  • FIG. 4 shows a detailed view of a conical attachment with a sleeve-shaped section, a holding means and tentacle-like extensions
  • FIG. 5 is a perspective view of a protective cap
  • FIG. 6 shows a detailed view A corresponding to FIG. 3,
  • Fig. 7 is a cross-sectional view through a sleeve-shaped section
  • Fig. 8 is a cross-sectional view through a sleeve-shaped section with an inner circumferential recess.
  • the syringe shown in FIGS. 1 and 2 consists of a cylinder 10, a piston 11, which on the end face has a cone-shaped projection eccentrically arranged here, onto which a corresponding cone-shaped attachment projection 16 is pushed is in which a cannula 12 is embedded.
  • a sleeve-shaped section designed as a bellows 14 is attached to the plug-on attachment 16, on the front side of which tentacle-like extensions 15 are fastened, which extend parallel to the cannula 12 and protrude beyond it, in the case shown, by a short piece at the end.
  • the cannula tip and the parts not covered are covered by a sleeve-shaped protective cap 13, which is pushed with its open end onto a correspondingly designed cylinder or cone surface of the sleeve-shaped section 14.
  • the cannula is thus covered along its full length.
  • the cannula with push-on attachment 16 and protective cap 12 and bellows 14 is packed separately from the cylinder 10 with piston 11.
  • the conical plug-on attachment is pushed onto the conical attachment on the syringe, so that the cannula is connected to the cylinder 10.
  • the protective cap 13 is now pulled off, so that the cannula tip is exposed.
  • the medicament to be injected After the medicament to be injected has been drawn up via the cannula 12, the medicament is injected subcutaneously, intravenously or intramuscularly.
  • the tentacle-shaped extensions 15 bend slightly to the side on the skin and do not impede the insertion process of the cannula even in the case of complicated intravenous use.
  • a swab is applied when the cannula is withdrawn from the puncture parts in order to prevent heavy subsequent bleeding. While the swab is pressed onto the skin, the tentacle-shaped extensions 15 are inevitably held, so that when the syringe is pulled off further, the bellows 14 is pulled apart, so that the position shown in FIG.
  • the conical attachment attachment 16 is connected to a sleeve-shaped section 17, but the connection point 18 is designed approximately in the form of a thinned wall thickness as a predetermined breaking point.
  • the connection to the conical attachment attachment 16 is broken, so that the sleeve-shaped section 17 can be pushed along the cannula 12 until it covers the tip of the cannula 12.
  • the tentacle-shaped extensions 15 serve as traction means when or shortly after the cannula 12 is pulled out of the puncture site - first to break open the predetermined breaking point 18 and finally to move the sleeve-shaped section 17 onto the cannula tip.
  • the holding means 19 ensure that the section 17 is only pulled into the area of the cannula tip.
  • the sleeve-shaped section 17 has pockets 20 into which spring elements can be lowered, namely when the sleeve 17 is moved in the direction of the tip of the cannula 12.
  • 7 shows a spring element 27 sunk into such a pocket 20 and a spread spring element 21.
  • a circumferential depression 28 of the partial inner jacket can be provided, which is adjacent to an undersize of the inner diameter towards the end-side conical extension.
  • FIG. 7 also shows a conical extension 26 which serves as a centering means when the cannula is inserted into the sleeve-shaped section.
  • FIG. 5 shows a protective cap 13 which has two slots 23 on opposite sides through which the holding means 19 and the ends of the tentacles 15 can be passed (see in particular FIG. 6).
  • two tongues 24 are also arranged on the push-on extension 16, which can be guided in pockets of the protective cap 13, which are not shown in detail, and ensure better bending stability of this protective cap.
  • the protective cap In the area of the closed end, the protective cap has a material thickening 25 in order to prevent the sharp cannula tip from being reliably pierced there.

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

L'invention concerne un dispositif de protection de canules (12), comportant un raccord d'enfichage conique (16) sur une extrémité, pouvant être enfiché sur un support conique correspondant d'une seringue (10, 11), un élément en forme de douille (14, 17) étant fixé audit raccord d'enfichage. Ledit élément peut être amené dans une position terminale sous l'effet d'un effort de traction. Dans ladite position terminale, l'élément en forme de douille couvre la pointe de la canule de manière périphérique.
EP02740305A 2001-05-05 2002-05-01 Dispositif de protection de canules Withdrawn EP1385565A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10121949 2001-05-05
DE10121949A DE10121949A1 (de) 2001-05-05 2001-05-05 Vorrichtung zur Vermeidung von Verletzungen durch gebrauchte medizinische Spritzen
PCT/DE2002/001581 WO2002089877A1 (fr) 2001-05-05 2002-05-01 Dispositif de protection de canules

Publications (1)

Publication Number Publication Date
EP1385565A1 true EP1385565A1 (fr) 2004-02-04

Family

ID=7683783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740305A Withdrawn EP1385565A1 (fr) 2001-05-05 2002-05-01 Dispositif de protection de canules

Country Status (4)

Country Link
US (1) US7160271B2 (fr)
EP (1) EP1385565A1 (fr)
DE (1) DE10121949A1 (fr)
WO (1) WO2002089877A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8052693B2 (en) * 2007-04-19 2011-11-08 Acclarent, Inc. System and method for the simultaneous automated bilateral delivery of pressure equalization tubes
KR101011770B1 (ko) * 2008-12-10 2011-02-07 이재수 실린더형 저장 용기

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795432A (en) * 1987-02-19 1989-01-03 Karczmer Claude M Shield assembly for hypodermic injection devices
US4820277A (en) 1988-02-16 1989-04-11 Norelli Robert A Safety cover for syringe needles
EP0436646B1 (fr) * 1988-09-30 1994-08-31 David S. Utterberg Ensemble d'aiguille protegee a ailettes
US4998922A (en) * 1990-02-23 1991-03-12 Kuracina Thomas C Safety syringe cap minimizing needle-stick probability
US5015240A (en) * 1990-05-01 1991-05-14 Ian Campbell Cree Hypodermic needle shield
SE468620B (sv) * 1991-05-07 1993-02-22 Hans Enstroem Anordning av engaangstyp foer genomstickning av hud
US5324302A (en) * 1992-10-13 1994-06-28 Sherwood Medical Company Lancet with locking cover
FR2751230B1 (fr) * 1996-07-17 1999-04-02 Lahlou Khalid Pierre Aiguille invasive de securite pour seringue d'injection
US5919168A (en) * 1997-08-25 1999-07-06 Wheeler; Alton D. Injection needle protection
US6409706B1 (en) * 1999-05-14 2002-06-25 Randall A. Loy Safety syringe, fluid collection device, and associated methods

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02089877A1 *

Also Published As

Publication number Publication date
US20040133170A1 (en) 2004-07-08
DE10121949A1 (de) 2002-12-05
US7160271B2 (en) 2007-01-09
WO2002089877A1 (fr) 2002-11-14

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