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WO2010116493A1 - Aiguille composée avec mécanisme de verrouillage - Google Patents

Aiguille composée avec mécanisme de verrouillage Download PDF

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Publication number
WO2010116493A1
WO2010116493A1 PCT/JP2009/057136 JP2009057136W WO2010116493A1 WO 2010116493 A1 WO2010116493 A1 WO 2010116493A1 JP 2009057136 W JP2009057136 W JP 2009057136W WO 2010116493 A1 WO2010116493 A1 WO 2010116493A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
cap
lock member
inner needle
tapered
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.)
Ceased
Application number
PCT/JP2009/057136
Other languages
English (en)
Japanese (ja)
Inventor
英也 齋藤
晶洋 猿谷
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.)
Unisis Corp
Original Assignee
Unisis Corp
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 Unisis Corp filed Critical Unisis Corp
Priority to JP2009531650A priority Critical patent/JP4550161B1/ja
Priority to PCT/JP2009/057136 priority patent/WO2010116493A1/fr
Publication of WO2010116493A1 publication Critical patent/WO2010116493A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters

Definitions

  • the present invention relates to a compound needle used for spinal anesthesia and the like.
  • the outer needle is first inserted into the body, and then the thin inner needle is inserted through the outer needle to a predetermined position in the body, and an anesthetic solution is injected from the proximal end side of the inner needle with a syringe. Initially, this type of compound needle did not have a means for fixing the inner needle to the outer needle.
  • the original compound needle of this type does not have a means to fix the inner needle to the outer needle, so that even if the inner needle is inserted through the outer needle until the tip reaches an anesthetic position, the patient's Due to the movement of the body and the operation of connecting the syringe barrel to the proximal end of the inner needle, the position of the tip of the inner needle may shift, and anesthesia may not work as expected, or the anesthetic solution may be wasted. .
  • Patent Document 1 a compound needle shown in Patent Document 1 below has been proposed.
  • This is a compound needle that has a cylindrical base at the proximal end of the outer needle and inserts the inner needle inside from the rear end of the cylindrical base toward the distal direction.
  • a cylindrical cap with a tapered end and a slit in the axial direction is attached to the inside of the cylindrical base of the outer needle base end with Then, when the cylindrical cap is advanced to the distal end side, the distal end portion of the cylindrical cap enters the tapered portion inside the cylindrical base portion to reduce the diameter, and the inserted inner needle is tightened and locked, and the cylindrical cap is retracted. If it does, a front-end
  • This invention makes it a subject to develop the compound needle
  • the present invention relates to a compound needle having an outer needle having a cylindrical base at the proximal end and an inner needle that is inserted from the rear end of the cylindrical base and protrudes from the distal end of the outer needle.
  • An insertion hole through which the inner needle is inserted has a cylindrical shape formed in the axial direction, and an insertion portion in front of the flange portion formed on the outer peripheral surface of the axial intermediate portion is inserted into the cylindrical base portion from the rear,
  • a locking member having a tapered surface whose outer diameter is reduced toward the rear side at the rear end, and a slit in which the cylindrical wall is cut in the axial direction; It has a cylindrical shape, a screw thread is formed on the inner peripheral surface of the front end portion to be screwed with a screw thread formed on the outer peripheral surface of the rear end portion of the cylindrical base portion, and has an insertion hole through which the inner needle is inserted.
  • the taper surface of the lock member enters the taper recess of the cap, the insertion hole of the portion where the taper surface is formed is reduced, and the inserted inner needle is tightened
  • the cap is locked and the cap is rotated in the opposite direction and the cap is retracted, the tapered recess of the cap is retracted with respect to the taper surface of the lock member, the diameter of the insertion hole of the lock member is expanded, and the lock of the inner needle is released.
  • the taper surface of the lock member shrinks and the inner needle is tightened and fixed.
  • the lock member moves forward with the flange contacting the rear end surface of the cylindrical base. Because there is no, the inner needle will not advance unexpectedly.
  • both the outer peripheral surface of the insertion portion of the lock member and the inner peripheral surface of the cylindrical base portion into which the insertion portion is inserted can be tapered. (Claim 2) By doing in this way, the insertion part of a lock member can be easily inserted in the rear-end part of a cylindrical base part.
  • the slit can also be formed in the flange portion. (Claim 3) By doing so, when the cap is advanced to lock the inner needle, the taper surface of the lock member is easily reduced in diameter, and the inner needle can be securely tightened and fixed.
  • the inner needle can be fixed (locked) with respect to the outer needle at an arbitrary position. The position will not shift. Also, when the cap is advanced to lock the inner needle, the taper surface of the lock member shrinks and the inner needle is tightened and fixed. However, the lock member moves forward with the flange contacting the rear end surface of the cylindrical base. Therefore, the inner needle will not move forward unintentionally, so that there is no risk of damaging the nerve tissue and the like, and the drug solution can be reliably injected into a predetermined portion.
  • FIG. 1 It is a top view of compound needle 1 of an example. It is principal part sectional drawing which cut
  • FIG. 1 It is a top view of compound needle 1 of an example. It is principal part sectional drawing which cut
  • FIG. 1 It is a top view of compound needle 1 of an example. It is principal part sectional drawing which cut
  • the compound needle 1 of the embodiment has an outer needle 2 and an inner needle 5.
  • a cylindrical base 3 is fixed to the proximal end of the outer needle 2.
  • the outer needle 2 and the cylindrical base 3 are formed with insertion holes through which the inner needle 5 is inserted over the entire axial direction.
  • the cylindrical base 3 has a thread 3 a on the outer peripheral surface of the cylindrical rear end, which is screwed with the screw 4 a on the inner peripheral surface of the tip of the cap 4. .
  • the insertion portion 7a of the lock member 7 is inserted into the rear end portion.
  • the inner peripheral surface 3b of the portion is tapered so that the inner diameter becomes smaller toward the front side.
  • a blade 3c is fixed to the middle part of the cylindrical base 3 slightly forward.
  • the lock member 7 is made of plastic, has a substantially cylindrical shape, and has an insertion hole 7e through which the inner needle is inserted in the axial direction.
  • a flange portion 7b bulging in an annular shape is formed in the intermediate portion in the axial direction, and an insertion portion 7a to be inserted into the rear end portion of the cylindrical base portion 3 is provided in front of the flange portion 7b.
  • the outer peripheral surface of the insertion portion 7a has a taper shape corresponding to the inner peripheral surface 3b of the cylindrical base 3 and the outer diameter decreases toward the front side.
  • the flange portion 7 b comes into contact with the rear end surface of the cylindrical base portion 3 and the lock member 7 is positioned.
  • a tapered surface 7c having an outer diameter that decreases toward the rear side is formed, and further, three slits 7d in which the cylindrical wall is cut in the axial direction are formed.
  • the slit 7d extends further forward and reaches a part of the flange portion 7b and the insertion portion 7a.
  • the number and length of the slits are appropriately designed so that the insertion hole in the tapered surface 7c can be sufficiently reduced in diameter so that the inner needle can be securely fastened and fixed.
  • the cap 4 is made of plastic and has a substantially cylindrical shape, and a screw thread 4a is formed on the inner peripheral surface of the front end part to be screwed with the screw thread 3a formed on the outer peripheral surface of the rear end part of the cylindrical base part 3.
  • the rear end portion has an insertion hole 4c through which the inner needle 5 is inserted, and a tapered recess 4b in which a tapered surface whose inner diameter is reduced toward the rear side corresponding to the tapered surface 7c of the lock member 7 is formed.
  • FIG. 5 shows a state where the inner needle is not inserted. However, when the inner needle is inserted, the insertion hole 7e in the portion where the tapered surface 7c is formed is appropriately reduced in diameter, and the inner needle is contracted. It is fastened and fixed by the diameter of the insertion hole 7e and is locked.
  • the outer needle 2 (the lock member 7 and the cap 4 are already mounted) is inserted into the patient's body.
  • a stylet (not shown) that closes the hole at the tip of the needle
  • damage to the patient's tissue can be reduced as in the conventional case.
  • the inner needle 5 is inserted through the insertion hole 4c on the rear end side of the cap 4, and the needle tip is advanced to a predetermined position in the patient's body. Even when the inner needle 5 is inserted, a stylet (not shown) that closes the hole at the tip of the inner needle can be used as in the prior art.
  • the cap 4 is rotated to fix the inner needle 5 to the outer needle 2. At this time, there is no possibility that the inner needle 5 moves forward.
  • a syringe (not shown) is connected to the inner needle base 6 on the proximal end side of the inner needle 5 to inject the drug solution into the body.
  • the inner needle that is locked may be removed together with the outer needle, or the cap 4 is rotated to unlock the inner needle 5, the inner needle 5 is removed from the outer needle 2, and finally Alternatively, the outer needle 2 may be removed from the body.
  • the compound needle of the present invention is not limited to the embodiment, and it is needless to say that various modifications can be made within the scope described in the claims.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (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 porte sur une aiguille composée dans laquelle une aiguille intérieure n'avance pas lorsqu'on avance un capuchon de façon à verrouiller l'aiguille intérieure. L'aiguille composée comporte une aiguille extérieure comportant une base tubulaire à l'extrémité de base de l'aiguille extérieure, ainsi qu'une aiguille intérieure introduite à partir de l'extrémité postérieure de la base tubulaire et faisant saillie à partir de l'embout de l'aiguille extérieure. L'aiguille composée comprend un élément de verrou comportant une section d'introduction située à l'avant d'une section de bord formée sur la surface périphérique extérieure d'une section axialement intermédiaire, une surface filetée disposée à l'extrémité postérieure de l'élément de verrou et ayant un diamètre extérieur réduit vers l'arrière de l'élément de verrou, et une fente formée par découpe axiale d'une paroi tubulaire de l'élément de verrou. La section d'introduction de l'élément verrou est introduite par l'arrière dans la base tubulaire. Lorsqu'on fait tourner un capuchon et qu'on le fait avancer vers l'extrémité antérieure de celui-ci, la surface filetée de l'élément de verrou entre dans un évidement effilé du capuchon afin de réduire le diamètre du trou d'introduction là où est formée la surface filetée. Ceci serre l'aiguille intérieure introduite afin de placer celle-ci dans un état verrouillé. Du fait que la section de rebord est en contact avec la surface d'extrémité postérieure de la base tubulaire afin d'empêcher l'élément de verrou d'avancer, l'aiguille intérieure n'avance pas de façon non intentionnelle.
PCT/JP2009/057136 2009-04-07 2009-04-07 Aiguille composée avec mécanisme de verrouillage Ceased WO2010116493A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009531650A JP4550161B1 (ja) 2009-04-07 2009-04-07 ロック機構付複合針
PCT/JP2009/057136 WO2010116493A1 (fr) 2009-04-07 2009-04-07 Aiguille composée avec mécanisme de verrouillage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/057136 WO2010116493A1 (fr) 2009-04-07 2009-04-07 Aiguille composée avec mécanisme de verrouillage

Publications (1)

Publication Number Publication Date
WO2010116493A1 true WO2010116493A1 (fr) 2010-10-14

Family

ID=42935802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/057136 Ceased WO2010116493A1 (fr) 2009-04-07 2009-04-07 Aiguille composée avec mécanisme de verrouillage

Country Status (2)

Country Link
JP (1) JP4550161B1 (fr)
WO (1) WO2010116493A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2591817A1 (fr) * 2011-11-11 2013-05-15 Sanofi-Aventis Deutschland GmbH Ensemble d'aiguille, dispositif d'administration de médicaments et distributeur d'aiguilles
JP2021049233A (ja) * 2019-09-26 2021-04-01 メディカル・イノベイション株式会社 イントロデューサ針

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5059186A (en) * 1988-03-07 1991-10-22 Vitaphore Corporation Percutaneous access device
JPH0951954A (ja) * 1995-08-15 1997-02-25 Nippon Zeon Co Ltd ガイドワイヤ固定具およびそれを備えたカテーテルセット
JP2001137351A (ja) * 1999-11-11 2001-05-22 Terumo Corp カテーテル組立体
JP2001178823A (ja) * 1999-12-24 2001-07-03 Unisis:Kk ロック機構付ガイド針

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318529A (en) * 1989-09-06 1994-06-07 Boston Scientific Corporation Angioplasty balloon catheter and adaptor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5059186A (en) * 1988-03-07 1991-10-22 Vitaphore Corporation Percutaneous access device
JPH0951954A (ja) * 1995-08-15 1997-02-25 Nippon Zeon Co Ltd ガイドワイヤ固定具およびそれを備えたカテーテルセット
JP2001137351A (ja) * 1999-11-11 2001-05-22 Terumo Corp カテーテル組立体
JP2001178823A (ja) * 1999-12-24 2001-07-03 Unisis:Kk ロック機構付ガイド針

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2591817A1 (fr) * 2011-11-11 2013-05-15 Sanofi-Aventis Deutschland GmbH Ensemble d'aiguille, dispositif d'administration de médicaments et distributeur d'aiguilles
WO2013068414A1 (fr) * 2011-11-11 2013-05-16 Sanofi-Aventis Deutschland Gmbh Ensemble aiguille, dispositif d'administration de médicaments et distributeur d'aiguilles
CN104010680A (zh) * 2011-11-11 2014-08-27 赛诺菲-安万特德国有限公司 针组件、给药装置和针分配器
JP2021049233A (ja) * 2019-09-26 2021-04-01 メディカル・イノベイション株式会社 イントロデューサ針

Also Published As

Publication number Publication date
JP4550161B1 (ja) 2010-09-22
JPWO2010116493A1 (ja) 2012-10-11

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