WO1991014398A1 - Canule possedant un support cooperant - Google Patents

Canule possedant un support cooperant Download PDF

Info

Publication number
WO1991014398A1
WO1991014398A1 PCT/SE1991/000215 SE9100215W WO9114398A1 WO 1991014398 A1 WO1991014398 A1 WO 1991014398A1 SE 9100215 W SE9100215 W SE 9100215W WO 9114398 A1 WO9114398 A1 WO 9114398A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw thread
cannula
outwardly projecting
holder
protective sleeve
Prior art date
Application number
PCT/SE1991/000215
Other languages
English (en)
Inventor
Hans Axel Hedlund
Original Assignee
Hans Axel Hedlund
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 Hans Axel Hedlund filed Critical Hans Axel Hedlund
Publication of WO1991014398A1 publication Critical patent/WO1991014398A1/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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150015—Source of blood
    • A61B5/15003—Source of blood for venous or arterial blood
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150305—Packages specially adapted for piercing devices or blood sampling devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150389—Hollow piercing elements, e.g. canulas, needles, for piercing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150473—Double-ended needles, e.g. used with pre-evacuated sampling tubes
    • A61B5/150496—Details of construction of hub, i.e. element used to attach the double-ended needle to a piercing device or sampling device
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150633—Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150694—Procedure for removing protection means at the time of piercing
    • A61B5/150717—Procedure for removing protection means at the time of piercing manually removed
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150732—Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
    • A61B5/154—Devices using pre-evacuated means

Definitions

  • the present invention relates to a cannula and to a holder coacting therewith.
  • a protective sleeve is first removed fr ⁇ n the rear part of the cannula, whereafter this rear part is screwed onto a vacuum-container guide sleeve.
  • a protective sleeve is then removed from the front part of the cannula.
  • the needle or cannula is then inserted into a vein of the patient concerned.
  • a vacuum container is introduced into the guide sleeve, wherein the rear part of the cannula penetrates the seal on the vacuum container, so as to enable blood to flow into the container.
  • the cannula is reraoved and a protective sleeve is fitted to the front part of the cannula. This procedure involves the risk of being pricked by the cannula trocar or needle point.
  • U.S. Patent Specification No. 4,778,453 describes a cannula in which this latter risk is eliminated by the provision of a protective sleeve which embraces the front part of the cannula and which is axially m ⁇ veable relative thereto.
  • a protective sleeve which embraces the front part of the cannula and which is axially m ⁇ veable relative thereto.
  • the nursing attendant unscrews the back part of the cannula from the container and fits a protective sleeve to the rear end of the cannula. Consequently, there is again a risk that the attendant will be pricked, namely by the pointed rear part of the cannula.
  • the present invention also enables the aforesaid guide sleeve and protective sleeve for the rear part of the cannula to be handled more simply.
  • the present invention thus relates to a cannula of the kind which comprises a front part provided with a sharp point, or trocar, for insertion of the cannula into a patient, and a rear part provided with a sharp point for introduction into a blood collecting container, said cannula having a screw-threaded part located between said two pointed parts for coaction with a c ⁇ rresp ⁇ nding screw thread in a container guide sleeve.
  • a cannula of this kind is characterized in that the cannula is provided with a further screw thread which is located adjacent the first mentioned screw thread but closer to the rear pointed part, this further screw thread having a smaller diameter than the first mentioned screw thread; and in that the further screw thread is threaded in a direction opposite to the thread of the first mentioned screw thread, said further screw thread functioning to coact with a corresponding internal screw thread on a protective sleeve.
  • the invention also relates to a cannula holder of the kind defined in Claim 4 and having the characteristic features set forth therein.
  • Figure 1 illustrates a cannula constructed in accordance with the invention
  • Figure 2 is an axial section view of a protective sleeve
  • Figure 3 illustrates the protective sleeve of Figure 2 from above
  • Figure 4 illustrates a cannula with a protective sleeve screwed thereon
  • - Figure 5 illustrates an inventive cannula
  • Figure 6 is an axial section view of a holder constructed in accordance with the invention
  • Figure 7 illustrates the holder of Figure 6 from above;
  • Figure 8 illustrates a guide sleeve; and
  • - Figure 9 is a cross-sectional view taken on the line A-A in Figure 8.
  • Figures 1 and 5 illustrates the function of a cannula in accordance with the aforesaid U.S. patent specification.
  • This cannula eliminates the risk of personnel being pricked by the front pointed part 2, of the cannula 1.
  • the cannula includes a protective sleeve 3 which surrounds the front part of said cannula and which can be moved axially in relation to the cannula, between the position shown in Figure 1 and the position shewn in Figure 5.
  • the protective sleeve is located in the position shown in Figure 5 when the cannula is to be removed from a patient.
  • the protective sleeve 3 When the cannula is removed, the protective sleeve 3 is gripped and held stationary while drawing-out the cannula 1 at the same time, wherewith the protective sleeve 3 is moved to a position in which it surrounds the front part of the cannula, this position being shown in Figure 1.
  • the present invention relates to a cannula 1 of the kind which includes a front part provided with a pointed part or trocar 2 for insertion into a patient, and a rear pointed part 4 which is intended for insertion into a blood collecting container.
  • the cannula 1 has located between said pointed parts 2, 4 a part 5 which is provided with a screw thread 6 intended for coaction with a corresponding screw thread 7 in a guide sleeve 8 which coacts with the aforesaid holder.
  • the cannula 1 is provided with a further, second screw thread 9 which is located adjacent the first mentioned, first screw thread 6.
  • the second screw thread is located nearer the rear pointed-part 4 and has a .smaller diameter than the first screw thread 6.
  • the diameter of the second screw thread is suitably about half the diameter of the first screw thread.
  • the second screw thread 9 is also threaded in a direction opposite to the first screw thread 6.
  • the second screw thread 9 is intended for coaction with a protective sleeve 10 provided with a cxjrresponding internal screw thread 11, see Figures 2 and 4. When screwed into position, the protective sleeve 10 covers the rear pointed part 4 of the cannula 1, as shown in Figure 4.
  • both the first thread 6 and the second thread 9 have the same or essentially the same pitch.
  • the first screw thread 6 is intended for coaction with a cxjrresponding screw thread 7 provided in a guide sleeve 8 for the aforesaid container.
  • This known container may have the form of a glass test tube closed at one end by means of a rubber stepper. A partial vacuum corresponding to the amount of blood to be tapped or drained into the container is established in the container interior.
  • the container is filled in a conventional manner, by removing a protective sleeve, corresponding to the protective sleeve 10, where ⁇ after the cannula 1 is screwed onto the protective sleeve 8, through mutual coaction of the screw threads 6 and 7.
  • the protective sleeve exacting with the rear pointed-part 4 is not provided with screw threads.
  • the protective sleeve 3 is then moved to the position shown in Figure 4, whereafter the pointed-part 2 is inserted into a vein of the patient.
  • the pointed-part 4 extends slightly belcw the wall 12 of the guide sleeve 8 in this stage of the procedure.
  • the container is then pushed into the guide sleeve 8 in a direction downwards and upwards in Figure 8, with the rubber stopper upwards.
  • the rear pointed-part 4 of the cannula will therewith pene ⁇ trate the rubber stopper and blood is drawn into the container.
  • the invention also relates to a holder intended for coaction with a cannula of the kind described above.
  • the holder is illustrated in Figure 6, although in a smaller scale than the cannula 1 illustrated in Figure 5.
  • the holder 13 includes a centrally projecting first part 14 in which an axially extending recess 15 is formed. Spaced from the first part 14 is at least one second outwardly projecting part 16 and a slot 17 is provided between the parts 14, 16 parallel with the longitudinal axis of the first part 14.
  • the recess 15 has an internal shape which corresponds to the external shape of the protective sleeve 10.
  • the width and length of the slot 17 cor ⁇ respond respectively to the thickness and length of the guide sleeve 8, so as to enable the guide sleeve to be fitted onto the first part.
  • the holder 13 is provided with two second outwardly projecting parts 16, 18, which are positioned symmetrically in relation to the longitudinal axis of the first outwardly projecting part 14.
  • Figure 7 shows the holder 13 from above.
  • the aforesaid second outwardly projecting parts 16, 18 may have the form shown in Figure 7.
  • the holder 8 is illustrated in Figure 8.
  • the holder 8 includes at the bottcm end thereof a flange 19 which projects further on mutually opposite sides of one diameter line of the guide sleeve and which projects less on mutually opposite sides of another diameter line which extends perpendicular to the first mentioned diameter line, as illustrated in Figure 9.
  • the container may alterna ⁇ tively be configured so that flanges are present solely at two diametrically opposed locations, with no flange therebetween.
  • the slot 17 has a width such as to enable the guide sleeve 8, including the presence of any smaller outwardly projecting flange to be inserte into the slot.
  • the protective sleeve 10 When seen in cross-section, the protective sleeve 10 has a peripheral shape which deviates from a circular shape. This cross-sectional shape is preferably square, although any appropriate cross-sectional shape can be used. The object is to enable the protective sleeve 10 to be locked rotationally relative to the holder 13, when placing the holder in the recess 15.
  • the inventive cannula and holder operate in the following manner.
  • the cannula When a cannula is to be used, the cannula is removed from its packing and the protective sleeve 10 is screwed onto the cannula. A guide sleeve 8 is then fitted onto the first part 14 of the holder. The cannula, together with the protective sleeve fitted thereto, is then passed through a screw threaded hole 22 in the guide sleeve 8, so that the protective sleeve 10 will be pushed down into the holder recess 15, where the sleeve is locked rotationally in relation to the holder 13, as before described. The cannula is then screwed onto the guide sleeve, through the mutual coaction of the screw threads 6 and 7.
  • the protective sleeve 10 Since the first screw thread 9 on the cannula is threaded in the opposite direction to the second screw thread 6 of the cannula, the protective sleeve 10 will be unscrewed from the cannula as the cannula is screwed onto the guide sleeve 8.
  • a spring 23 Provided in the bottom of the recess 15 is a spring 23 which is compressed when the protective sleeve 10 is unscrewed from the cannula.
  • Blood is then tapped or drained into the container, in the aforedes- cribed manner.
  • the guide sleeve is again moved to the first part 14 of the holder, whereafter the cannula is unscrewed from the guide sleeve 8 and the protective sleeve 10 is screwed onto the cannula in conjunction therewith.
  • the invention eliminates two working steps, namely the step of first removing the protective sleeve 10 and the step of then refitting said protective sleeve, since these steps are carried out autcmatically when fitting and removing the guide sleeve 8 respectiv ⁇ ely.
  • the present invention therefore greatly enhances safety in handling a cannula and also makes handling of the cannula easier to accomplish. It will be understood that the present invention can also be applied to cannulas which lack an axially moveable protective sleeve 3, even though it is preferred to use a cannula which is provided with an axially moveable protective sleeve.

Abstract

Canule du type qui comporte une partie avant possédant un élément pointu devant s'introduire dans un malade, et une partie arrière possédant un élément pointu devant s'introduire dans un récipient collecteur de sang. La canule est disposée sur une partie située entre les éléments pointus et présente un filetage destiné à coopérer avec un filetage correspondant dans une gaine de guidage du récipient. La canule (1) est munie d'un filetage supplémentaire (9) situé à côté du filetage précité (6) mais plus près de l'élément pointu arrière (4). Le diamètre du filetage supplémentaire (9) est inférieur à celui du premier filetage (6) et il est fileté dans le sens contraire à celui-ci. Le filetage supplémentaire (9) est destiné à coopérer avec une gaine de protection (10) munie d'un filetage correspondant (11).
PCT/SE1991/000215 1990-03-20 1991-03-20 Canule possedant un support cooperant WO1991014398A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9001004-2 1990-03-20
SE9001004A SE465703B (sv) 1990-03-20 1990-03-20 Kanyl jaemte en med kanylen samverkande haallare

Publications (1)

Publication Number Publication Date
WO1991014398A1 true WO1991014398A1 (fr) 1991-10-03

Family

ID=20378926

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000215 WO1991014398A1 (fr) 1990-03-20 1991-03-20 Canule possedant un support cooperant

Country Status (3)

Country Link
AU (1) AU7567991A (fr)
SE (1) SE465703B (fr)
WO (1) WO1991014398A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342449A2 (fr) * 2002-02-25 2003-09-10 Nipro Corporation Aiguille de prélèvement de sang

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434046B2 (de) * 1974-07-16 1979-03-01 Lothar 7500 Karlsruhe Schwarz Nadelhalterung für medizinische Spritzen
US4717386A (en) * 1985-12-20 1988-01-05 John Simmons Safety device for a needle
EP0286087A2 (fr) * 1987-04-07 1988-10-12 ICU Medical, Inc. Dispositif médical

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434046B2 (de) * 1974-07-16 1979-03-01 Lothar 7500 Karlsruhe Schwarz Nadelhalterung für medizinische Spritzen
US4717386A (en) * 1985-12-20 1988-01-05 John Simmons Safety device for a needle
EP0286087A2 (fr) * 1987-04-07 1988-10-12 ICU Medical, Inc. Dispositif médical

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342449A2 (fr) * 2002-02-25 2003-09-10 Nipro Corporation Aiguille de prélèvement de sang
EP1342449A3 (fr) * 2002-02-25 2004-06-16 Nipro Corporation Aiguille de prélèvement de sang
US7147608B2 (en) 2002-02-25 2006-12-12 Nipro Corporation Blood collecting needle

Also Published As

Publication number Publication date
SE9001004D0 (sv) 1990-03-20
AU7567991A (en) 1991-10-21
SE9001004A (fr) 1991-09-21
SE465703B (sv) 1991-10-21

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