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WO1998040116A1 - Aiguille anesthesique a usage medical - Google Patents

Aiguille anesthesique a usage medical Download PDF

Info

Publication number
WO1998040116A1
WO1998040116A1 PCT/JP1997/000730 JP9700730W WO9840116A1 WO 1998040116 A1 WO1998040116 A1 WO 1998040116A1 JP 9700730 W JP9700730 W JP 9700730W WO 9840116 A1 WO9840116 A1 WO 9840116A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
needle tube
cutting edge
catheter
inner peripheral
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/JP1997/000730
Other languages
English (en)
Japanese (ja)
Inventor
Ryochi Enishi
Akio Higuchi
Hayato Hyugaji
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.)
Soken Co Ltd
Original Assignee
Soken Co Ltd
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 Soken Co Ltd filed Critical Soken Co Ltd
Priority to PCT/JP1997/000730 priority Critical patent/WO1998040116A1/fr
Publication of WO1998040116A1 publication Critical patent/WO1998040116A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/065—Guide needles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia

Definitions

  • the present invention relates to a needle tube of an anesthesia needle into which a catheter or the like for injecting an anesthetic is inserted.
  • An anesthesia needle for performing anesthesia by inserting a catheter or the like has an outer needle formed of a needle tube having a blade-shaped bend.
  • anesthesia needle When anesthesia needle is used to anesthetize a specific nerve branching from the medulla, a needle tube is punctured into the human body so that the cutting edge is located in the epidural space, and the catheter is protruded from the opening in the cutting edge.
  • Epidural is injected through a catheter into the epidural.
  • To anesthetize a specific nerve adjust the length and direction of the catheter protruding from the cutting surface of the needle tube. After injection of the anesthetic, the catheter is withdrawn from the needle tube.
  • the catheter comes into contact with the rear inner peripheral edge of the opening where the inner peripheral surface intersects with the cutting surface of the needle tube blade.
  • the inner peripheral edge of the rear part that abuts the outer peripheral surface of the catheter is rounded at the tip by chamfering, but since the cutting edge surface and the inner peripheral surface intersect at an acute angle in the vertical cross section, the inner peripheral surface of the catheter Make contact with the bite. As a result, the catheter was damaged and sometimes cut off.
  • An object of the present invention is to provide a medical anesthesia needle that does not damage a catheter that enters and exits an opening in a blade edge surface. Disclosure of the invention The present invention relates to a needle tube of a medical anesthesia needle having a bevel-shaped bend in a medical anesthetic needle. The rear inner peripheral edge of the opening where the cutting edge surface and the inner peripheral surface intersect is cut so that the rear radial width is less than half of the front radial width, and the rear surface is provided. The lower end edge where the planes intersect forms an obtuse angle in the vertical section including the needle center.
  • This cutting can be done by mechanical cutting, but it takes time and effort to remove the generated burrs, so it is necessary to melt and cut the rear inner peripheral part of the opening by electric discharge machining that does not generate burrs. Is preferred.
  • the needle tube of the anesthesia needle of the present invention retreats, and the rear inner peripheral edge of the opening is retracted from the conventional one by resection, and the The lower end edge where the inner peripheral surface intersects with the rear peripheral portion, which is in contact with the lateral peripheral surface, has an obtuse angle in the vertical cross section.
  • FIG. 1 is a side view of the outer needle of the anesthesia needle of the present invention
  • FIG. 2 is an enlarged plan view of the cutting edge of the needle tube of FIG. 1,
  • FIG. 3 is an enlarged sectional view of the cutting edge of the needle tube of FIG. 1,
  • FIG. 4 is an enlarged view of part A of FIG. 3,
  • FIG. 5 is a diagram corresponding to FIG. 4 of another embodiment
  • FIG. 6 is a diagram corresponding to FIG. 4 of yet another embodiment, BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a side view showing the appearance of an anesthesia needle 1 called an outer needle.
  • the anesthesia needle 1 is composed of a needle base 2 and a needle tube 10 extending from the needle base. When the needle tube 10 is horizontal and the cutting edge surface 12 faces upward, the front cutting edge portion 11 bends upward.
  • FIG. 2 is an enlarged plan view of the cutting edge portion 11 viewed from the cutting edge surface 12 side, and the cutting edge surface 12 surrounding the opening 16 of the needle tube 10 is a ring-shaped ellipse having different radial widths before and after. . This is done by cutting the inner peripheral surface 13 behind the opening 16 so that the radial width behind the cutting edge surface 12 is half the radial width ahead of the cutting surface 12 to form the rear surface 14 of the opening 16 It depends.
  • FIG. 3 is an enlarged cross-sectional view showing a state in which the inserted catheter 3 is projected from the opening 16 of the cutting edge 11, and the side peripheral surface of the catheter 3 is viewed from the rear cutting edge 12.
  • the lower end edge 15 where the hanging rear surface portion 14 and the inner peripheral surface 13 intersect is contacted.
  • FIG. 4 is an enlarged view of a portion indicated by A in FIG.
  • the rear surface portion 14 is formed so that the cutting edge surface 12 of the cutting edge portion 11 intersects with the inner peripheral surface 13 to form an acute angle, so that the radial width behind the cutting edge surface 12 becomes approximately half. It is formed by cutting away perpendicularly to the needle axis. Therefore, the position of the lower edge 15 in contact with the catheter 3 is retreated and the force te is reduced as compared with the conventional one in which the rear radial width of the cutting edge is the same as the front radial width. Since the cross-sectional angle of the lower edge 15 in contact with the tell 3 is an obtuse angle that is greater than a right angle, it can be said that there is almost no risk of biting into the catheter and causing damage.
  • the rear part 14 in Fig. 4 is a concave surface perpendicular to the needle axis, As described above, the rear surface portion 14 of the cutting edge portion 11 may be formed as a concave surface that becomes narrower below the horizontal needle axis. In this case, the intersection angle between the rear surface portion 14 and the inner peripheral surface 13 is smaller than that in FIG. 4, but the position of the lower edge 15 is more retreated than the conventional one, and the cross-sectional angle is smaller. Due to the acute angle or slightly greater, the lower edge 15 is less likely to cut into the catheter and cause damage.
  • the rear surface portion 14 of the cutting edge portion 11 may be formed as a concave surface that expands downward with respect to the needle axis when the needle tube is horizontal.
  • the intersection angle between the rear surface portion 14 and the inner peripheral surface 13 is further larger than that in FIG. 4, and the position of the lower edge 15 is further retracted. Since the cross-sectional angle of the lower edge is a larger obtuse angle, it can be said that there is no risk of damaging the catheter.

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

Tube (10) d'aiguille creuse anesthésique à usage médical permettant d'anesthésier un patient au moyen d'un cathéter (3) servant à injecter dans le corps du patient un anesthésiant inséré dans le tube de l'aiguille, ledit cathéter (3) saillant à partir d'une surface (12) de bord d'une partie tranchante (11) et courbe. Lorsque le tube (10) de l'aiguille est placé horizontalement et que la partie tranchante et la surface (12) de bord sont orientées respectivement vers l'avant et vers le haut, une partie arrière d'une ouverture (16) d'une surface circulaire interne (13), croisant la surface (12) de bord de la partie tranchante (11), est découpée de façon que la largeur radiale d'une portion arrière de la surface (12) de bord ne dépasse pas la moitié de la largeur radiale de la portion frontale de la surface. Dans la position décrite ci-dessus, on forme une partie arquée (14) de la surface arrière, croisant la surface circulaire interne (13) à angle droit ou à un angle plus grand que le même angle se trouvant dans une section transversale verticale comprenant l'axe du tube de l'aiguille.
PCT/JP1997/000730 1997-03-10 1997-03-10 Aiguille anesthesique a usage medical Ceased WO1998040116A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/000730 WO1998040116A1 (fr) 1997-03-10 1997-03-10 Aiguille anesthesique a usage medical

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/000730 WO1998040116A1 (fr) 1997-03-10 1997-03-10 Aiguille anesthesique a usage medical

Publications (1)

Publication Number Publication Date
WO1998040116A1 true WO1998040116A1 (fr) 1998-09-17

Family

ID=14180181

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/000730 Ceased WO1998040116A1 (fr) 1997-03-10 1997-03-10 Aiguille anesthesique a usage medical

Country Status (1)

Country Link
WO (1) WO1998040116A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001066177A1 (fr) * 2000-03-08 2001-09-13 Dr. Japan Co., Ltd. Canule d'introduction de diagnostic ou de therapie
WO2002007801A3 (fr) * 2000-07-20 2002-05-23 Becton Dickinson Co Aiguille epidurale possedant deux chamfreins
GB2425484A (en) * 2005-04-29 2006-11-01 Univ Hospital Birmingham Nhs F Improvement in and relating to catheter needles
CN104114220A (zh) * 2011-08-18 2014-10-22 光谱医疗器械公司 用于射频针的导引器
JP2015002920A (ja) * 2013-06-21 2015-01-08 株式会社パイオラックスメディカルデバイス ガイドワイヤ挿入装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951863A (ja) * 1982-09-17 1984-03-26 テルモ株式会社 留置カテーテル
JPS5951862A (ja) * 1982-08-06 1984-03-26 ジヨン・マ−テイン・エバンス 医療用器具
JPH04309369A (ja) * 1991-01-17 1992-10-30 Fresenius Ag カニューレ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951862A (ja) * 1982-08-06 1984-03-26 ジヨン・マ−テイン・エバンス 医療用器具
JPS5951863A (ja) * 1982-09-17 1984-03-26 テルモ株式会社 留置カテーテル
JPH04309369A (ja) * 1991-01-17 1992-10-30 Fresenius Ag カニューレ

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001066177A1 (fr) * 2000-03-08 2001-09-13 Dr. Japan Co., Ltd. Canule d'introduction de diagnostic ou de therapie
WO2002007801A3 (fr) * 2000-07-20 2002-05-23 Becton Dickinson Co Aiguille epidurale possedant deux chamfreins
GB2425484A (en) * 2005-04-29 2006-11-01 Univ Hospital Birmingham Nhs F Improvement in and relating to catheter needles
CN104114220A (zh) * 2011-08-18 2014-10-22 光谱医疗器械公司 用于射频针的导引器
EP2744556A4 (fr) * 2011-08-18 2015-05-27 Spectra Medical Devices Inc Dispositif d'introduction pour aiguille à radiofréquence
US9125684B2 (en) 2011-08-18 2015-09-08 Spectra Medical Devices, Inc. Introducer for radiofrequency needle
JP2015002920A (ja) * 2013-06-21 2015-01-08 株式会社パイオラックスメディカルデバイス ガイドワイヤ挿入装置

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