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WO1993004721A1 - Catheter tubulaire pour anesthesie peridurale - Google Patents

Catheter tubulaire pour anesthesie peridurale Download PDF

Info

Publication number
WO1993004721A1
WO1993004721A1 PCT/EP1992/001946 EP9201946W WO9304721A1 WO 1993004721 A1 WO1993004721 A1 WO 1993004721A1 EP 9201946 W EP9201946 W EP 9201946W WO 9304721 A1 WO9304721 A1 WO 9304721A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube catheter
tip
tube
outlet openings
catheter
Prior art date
Application number
PCT/EP1992/001946
Other languages
German (de)
English (en)
Inventor
Hans Haindl
Original Assignee
Medimex Holfeld Gmbh & Co.
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 Medimex Holfeld Gmbh & Co. filed Critical Medimex Holfeld Gmbh & Co.
Publication of WO1993004721A1 publication Critical patent/WO1993004721A1/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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • 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
    • A61M19/00—Local anaesthesia; Hypothermia

Definitions

  • the invention relates to a tube catheter of the type mentioned in the preamble of claim 1 for epidural anesthesia.
  • Epidural anesthesia is an anesthetic procedure for the lower two thirds of the human body that maintains consciousness.
  • a local anesthetic ⁇ is introduced into the space outside the hard meninges enveloping the spinal cord.
  • the cannula is inserted, which is inserted into this space and through which a local anesthetic is then injected.
  • Tube catheters are used to achieve long-term analgesia.
  • a cannula is first inserted into the space mentioned outside the hard meninges covering the spinal cord and then a tube catheter is inserted into this space through this cannula. The cannula is then pulled out while the tube catheter remains in the inserted position.
  • Tube catheters consist in the fact that the front wall edges in the area of the catheter tip cannot be rounded off properly. This often leads to irritation of the nerve roots. There is also a risk of perforation of the hard meninges or the vessels in the epidural space. If aspiration is carried out to check whether the catheter has perforated the dura, there is a risk that tissue will lie in front of the terminal mouth and thus simulate a negative aspiration test, even though the tube catheter is located within the spinal space.
  • the British Standard 6196: 1982 mentioned above discloses a tube catheter of the type in question for epidural anesthesia, the tip of which is closed and rounded and in which there are three lateral exit holes on the first 20 millimeters behind the tip, and at a distance that is a multiple of the catheter diameter.
  • the tip can be rounded better, so that it causes fewer nerve irritations and the risk of perforation of the dura or perforations of epidural vessels is reduced.
  • the exit of the local anesthetic is not defined because of the exit holes arranged at a distance from one another.
  • the position of the catheter cannot be exactly determined by aspiration.
  • the invention has for its object a
  • the lateral outlet openings are arranged directly behind the tip in the catheter according to the invention. This precisely defines the location of an injected local anesthetic.
  • the position of the catheter and in particular its defined outlet openings can be checked by aspiration. Since several, preferably two outlet openings are provided, there is a risk that the position of the tube can be checked during aspiration catheter tissue in front of the outlet openings, reduced. Since all of the outlet openings are located essentially at the same point in the longitudinal direction of the catheter, there is no risk of liquor flowing back into the epidural space under negative pressure in the event of perforation of the dura.
  • the lateral outlet openings are expediently arranged at a distance from the tip of the tube catheter which corresponds approximately to two to three times the diameter of the tube catheter. In terms of flow, this means that the anesthetic emerges practically immediately in the area of the tip of the tube catheter.
  • outlet openings can be provided distributed over the circumference.
  • two outlet openings are essentially diametrically opposed. They can be slightly offset in the longitudinal direction of the catheter, preferably by approximately one diameter of an outlet opening. This simplifies production.
  • the tip of the tube catheter has an X-ray contrast material or a X-ray contrast body, which is preferably designed as a short metal rod or metal ball, which is expediently arranged in the lumen of the tube catheter between the tip and the outlet openings is.
  • the position of the tip on the x-ray image, or at least with magnetic resonance imaging, can be determined by such an x-ray contrast body.
  • the drawing shows in section a part of an embodiment of a tube catheter 1 according to the Er finding in its end area.
  • the tube catheter 1 has a rounded tip 2, which tightly closes the lumen of the tube catheter 1. Close behind the rounded tip 2 there are outlet openings 3 in the wall of the tube catheter 1, which are diametrically opposite and are slightly offset in the longitudinal direction of the tube catheter 1.

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)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

Un cathéter tubulaire pour anesthésie péridurale comporte une pointe fermée et arrondie ainsi que des orifices de sortie latéraux et est caractérisé en ce que ces orifices de sortie latéraux (3) sont situés immédiatement derrière la pointe (2).
PCT/EP1992/001946 1991-09-07 1992-08-25 Catheter tubulaire pour anesthesie peridurale WO1993004721A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9111097U DE9111097U1 (de) 1991-09-07 1991-09-07 Schlauchkatheter zur Epiduralanästhesie
DEG9111097.1U 1991-09-07

Publications (1)

Publication Number Publication Date
WO1993004721A1 true WO1993004721A1 (fr) 1993-03-18

Family

ID=6871010

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001946 WO1993004721A1 (fr) 1991-09-07 1992-08-25 Catheter tubulaire pour anesthesie peridurale

Country Status (2)

Country Link
DE (1) DE9111097U1 (fr)
WO (1) WO1993004721A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0728495A3 (fr) * 1995-01-25 1999-04-28 Len Edwards Scrymgeour Carrie Cathéter épidural

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885561A (en) * 1971-12-15 1975-05-27 Charles N Mazal Cami Catheter
US4186745A (en) * 1976-07-30 1980-02-05 Kauzlarich James J Porous catheters
WO1990006783A1 (fr) * 1988-12-20 1990-06-28 William Cook Europe A/S Dispositif d'anesthesie pleurale
US4973305A (en) * 1989-12-08 1990-11-27 David Goltzer Method and apparatus for inserting and retaining an epidural catheter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3605750A (en) * 1969-04-07 1971-09-20 David S Sheridan X-ray tip catheter
US4182326A (en) * 1977-08-26 1980-01-08 Ims Limited Laryngotracheal syringe
DE3512482C2 (de) * 1985-04-04 1994-01-20 Doron Dr Mehler Katheterset

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885561A (en) * 1971-12-15 1975-05-27 Charles N Mazal Cami Catheter
US4186745A (en) * 1976-07-30 1980-02-05 Kauzlarich James J Porous catheters
WO1990006783A1 (fr) * 1988-12-20 1990-06-28 William Cook Europe A/S Dispositif d'anesthesie pleurale
US4973305A (en) * 1989-12-08 1990-11-27 David Goltzer Method and apparatus for inserting and retaining an epidural catheter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0728495A3 (fr) * 1995-01-25 1999-04-28 Len Edwards Scrymgeour Carrie Cathéter épidural

Also Published As

Publication number Publication date
DE9111097U1 (de) 1993-01-14

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