EP0120863A1 - A device for introducing a catheter into a blood-vessel - Google Patents

A device for introducing a catheter into a blood-vessel

Info

Publication number
EP0120863A1
EP0120863A1 EP19830901267 EP83901267A EP0120863A1 EP 0120863 A1 EP0120863 A1 EP 0120863A1 EP 19830901267 EP19830901267 EP 19830901267 EP 83901267 A EP83901267 A EP 83901267A EP 0120863 A1 EP0120863 A1 EP 0120863A1
Authority
EP
European Patent Office
Prior art keywords
catheter
cannula
introducer
needle
blood
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Withdrawn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
EP19830901267
Other languages
German (de)
French (fr)
Inventor
Bengt Gustavsson
Ioan Curelaru
Lars-Erik Linder
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
Priority claimed from PCT/SE1982/000127 external-priority patent/WO1982003558A1/en
Priority claimed from SE8203499A external-priority patent/SE8203499L/en
Application filed by Individual filed Critical Individual
Publication of EP0120863A1 publication Critical patent/EP0120863A1/en
Withdrawn legal-status Critical Current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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0662—Guide tubes
    • A61M25/0668—Guide tubes splittable, tear apart

Definitions

  • the present invention refers to a device for introducing a catheter into a blood-vessel and comprising a needle for puncturing the blood-vessel and an introducer-cannula intended to be introduced into the blood-vessel together with the needle and through which the catheter-cannula is intended to 0 be introduced into the blood-vessel after removal of the needle, said introducer-cannula having a front end with a reduced or tapering outer, diameter and which tightly connects to the needle.
  • the catheter-over- needle technique
  • the catheter is passed on the outside of the needle and this method is used for central venous 5 catheters.
  • This method however involves a great risk for • ' .. injuries on the catheterized and neighbouring organs owing to the long needle (16-18 cm.), which besides make the device difficult to handle.
  • the catheter is passed through the needle, " catheter-through-steel-needle” technique, at which the needle either may remain or be removed after the introduction of the catheter. Also this methods involves a great risk for injuries and a risk for catheter embolism, by the fact that the catheter easily is damaged by the sharp needle tip.
  • a stiff wire is used which is introduced into the blood-vessel
  • Desilet's and Hoffmanns technique there is provided a dilatation of the puncture hole by means of a special 0 introducer-cannula, through which the catheter then is introduced. It is however also a complicated method.
  • the catheter is introduced into the blood-vessel through the introducer-cannula after the removal of the 0 needle, after which the introducer-cannula is removed from the blood-vessel by displacing it backwards along the catheter.
  • the diameter of the catheter is limited by the inside diameter of the introducer-cannula, which is substantially constant except at a rear enlarged section.
  • the introduction of the 5 catheter which has substantially the same outer diameter as the inside diameter of the introducer- cannula will be difficult because of the friction against the inner walls of the introducer-cannula along the substantial length thereof. Besides the removal of the introducer-cannula from the blood-vessel can cause problems if the outer diameter of the catheter is not considerably smaller than the inside diameter of the introducer-cannula.
  • the device comprises a sleeve, the
  • the purpose of the present invention is to provide an 20 introducer-cannula adapted for the introduction of short catheters into peripheral blood-vessels as well as long central venous catheters and which shall fulfil the following demands :
  • Fig. 1 is a longitudinal section through an introducer-cannula according to the invention.
  • Fig. 2 is a longitudinal section of the whole device including the needle
  • Fig 3 is a longitudinal section according to f g. 2 of another embodiment .
  • Fig. 4a-c show schematically in a view from above different steps of the introduction of a catheter through an introducer-cannula according to the invention
  • Fig. 5-8 show in perspective the front end of different embodiments of the introducer-cannula according to the invention.
  • the introducer-cannula 10 is manufactured by a stiff plastic material, for example Teflon(R) and has a reduced front end. Alternatively the whole introducer-cannula 10 tapers towards the front end as is shown in fig. 3,6 and 7.
  • the opposite end of the introducer-cannula 10 is shaped as a holder member 11 and is provided with a grip 12 for facilitating the insertion.
  • a needle 13 is intended to be received within the introducer- cannula as is shown i fig. 2.
  • the reduced front end of the introducer-cannula 10 connects tightly to the needle 13 for facilitating the insertion.
  • the needle is provided with a holder member 14 with a grip 15. It would also be possible, as is shown in fig. 3, to give the needle 13 a shape corresponding to the introducer-cannula 10, i.e. a reduced front end or alternatively tapering over its entire length.
  • the front tip of the introducer-cannula is provided with a slit 16, which either as is shown in fig. 4 extends all the way to said end or as is shown in fig. 1-4 and 6-7 respectively ends shortly before the end.
  • the embodiment shown in fig. 6 is provided with two slits 16 on opposite sides of the introducer-cannula 10.
  • a line of weakness 17 connects to the slit 16, for example a groove, perforation or the like, which extends along the entire introducer-cannula 10 including its holder member 11 and along which the introducer-cannula can be splitted at its withdrawal.
  • the introducer-cannula 10 has no slit and is instead provided with a line of weakness 17 extending over its entire length.
  • the device is used in the following way.
  • the blood-vessel either a peripheral or central vein or artery, is punctured by means of the tip of the needle 13 and the whole device comprising needle 13 and introducer-cannula 10 is inserted together into the blood-vessel to the desired position.
  • the needle 13 is withdrawn.
  • the catheter 18 is then introduced through the introducer-cannula 10, at which the tip of the catheter forces the front end of the introducer-cannula
  • the introducer-cannula is easily removed from the catheter by severing it along the line of weakness 17.

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

Une canule d'introduction (10) permettant d'introduire un cathéter dans un vaisseau sanguin est pourvue d'une aiguille (10) sur l'extérieur et est introduite avec cette dernière dans le vaisseau sanguin. La canule d'introduction possède une extrémité antérieure ayant un diamètre conique ou réduit, cette extrémité antérieure étant reliée de manière étanche à l'aiguille. L'extrémité antérieure est pourvue d'une partie expansible, par exemple une partie à fente (16) qui peut être sectionnée par la pointe d'un cathéter (18) ayant un diamètre supérieur à celui de l'extrémité antérieur, pour permettre le passage du cathéter au travers de la canule d'introduction (10) dans le vaisseau sanguin après extraction de l'aiguille (13). En relation à cette partie expansible (16), il est prévu de préférence une ligne d'affaiblissement (17) s'étendant sur la partie restante de la longueur de la canule d'introduction et le long de laquelle la canule d'introduction peut être sectionnée pour facilier son extraction du cathéter (18) lorsque celui-ci a été positionné dans le vaisseau sanguin.An introduction cannula (10) for introducing a catheter into a blood vessel is provided with a needle (10) on the outside and is introduced with the latter into the blood vessel. The introduction cannula has a front end having a conical or reduced diameter, this front end being tightly connected to the needle. The anterior end is provided with an expandable part, for example a slotted part (16) which can be cut by the tip of a catheter (18) having a diameter greater than that of the anterior end, to allow the passage of the catheter through the introduction cannula (10) into the blood vessel after extraction of the needle (13). In relation to this expandable part (16), there is preferably provided a weakening line (17) extending over the remaining part of the length of the introduction cannula and along which the introduction cannula can be sectioned to facilitate its extraction from the catheter (18) when it has been positioned in the blood vessel.

Description

A DEVICE FOR INTRODUCING A CATHETER INTO A BLOOD-VESSEL
BACKGROUND OF THE INVENTION
5 The present invention refers to a device for introducing a catheter into a blood-vessel and comprising a needle for puncturing the blood-vessel and an introducer-cannula intended to be introduced into the blood-vessel together with the needle and through which the catheter-cannula is intended to 0 be introduced into the blood-vessel after removal of the needle, said introducer-cannula having a front end with a reduced or tapering outer, diameter and which tightly connects to the needle.
5 Plastic catheters are inserted into practically all body cavities and are used for treatment and examination purposes within the modern medical service. In order to introduce especially soft catheters in • for example a blood-vessel special devices are needed and there are suggested a number of 0 methods, which however all suffer from certain drawbacks.
Among these method it can be mentioned "the catheter-over- needle" technique, i.e. the catheter is passed on the outside of the needle and this method is used for central venous 5 catheters. This method however involves a great risk for •' .. injuries on the catheterized and neighbouring organs owing to the long needle (16-18 cm.), which besides make the device difficult to handle.
0 According to another method the catheter is passed through the needle, " catheter-through-steel-needle" technique, at which the needle either may remain or be removed after the introduction of the catheter. Also this methods involves a great risk for injuries and a risk for catheter embolism, by the fact that the catheter easily is damaged by the sharp needle tip.
It is also known to use an outer introducer-cannula by Teflon(R) , which is introduced into the blood-vessel together with the needle. After the puncture of the blood-vessel the needle is removed and the catheter is then introduced into the blood-vessel through the introducer-cannula. This method
05 however, easily causes injuries at the introduction owing to the considerable diameter of the introducer-cannula.
According to a further method, called Seldinger's technique, a stiff wire is used which is introduced into the blood-vessel
10 through the needle, after which the catheter is introduced over the wire, which act as a guide for the catheter. When the catheter .has been introduced the wire is withdrawn . It is however a complicated method, which often makes it necessary to perform a skin incision and to dilate the path for
15 permitting entrance of the catheter.
According to a developement of this technique, called Desilet's and Hoffmanns technique, there is provided a dilatation of the puncture hole by means of a special 0 introducer-cannula, through which the catheter then is introduced. It is however also a complicated method.
Through SE-B 414.453 there is previously known an introducer-cannula for introducing catheters into a 5 blood-vessel and which is provided with a chamfered front end
' - ,. which tightly connects to the needle in order to facilitate the introduction of the introducer-cannula into the blood-vessel. The catheter is introduced into the blood-vessel through the introducer-cannula after the removal of the 0 needle, after which the introducer-cannula is removed from the blood-vessel by displacing it backwards along the catheter. The diameter of the catheter is limited by the inside diameter of the introducer-cannula, which is substantially constant except at a rear enlarged section. The introduction of the 5 catheter, which has substantially the same outer diameter as the inside diameter of the introducer- cannula will be difficult because of the friction against the inner walls of the introducer-cannula along the substantial length thereof. Besides the removal of the introducer-cannula from the blood-vessel can cause problems if the outer diameter of the catheter is not considerably smaller than the inside diameter of the introducer-cannula.
05
Through DE-A 29.36.655 it is previously known a device for introducing a sampling instrument, urinary catheter or the like into a body cavity, e.g. the urethra, without the risk for contamination by germs. The device comprises a sleeve, the
10 front end of which is closed and can be broken by means of the instrument, the catheter or the like. Such an introducer sleeve could not be used in connection with the introduction of venous catheters into a blood-vessel, where yoύ firstly have to penetrate the skin. Besides it will not be possible to
15 break the closed end of the sleeve by a soft venous catheter.
THE PURPOSE AND MOST IMPORTANT FEATURES OF THE INVENTION
The purpose of the present invention is to provide an 20 introducer-cannula adapted for the introduction of short catheters into peripheral blood-vessels as well as long central venous catheters and which shall fulfil the following demands :
25 a) it shall be easily inserted into a blood-vessel and not - . injure this or the neighbouring organs, b) it shall be easily removable from the blood-vessel in order to prevent ackumulation of blood and growth of germs between the introducer-cannula and the catheter, 0 c) it shall not damage the catheter and by that cause catheter embolism, d) it shall permit the insertion of both soft and stiff catheters , e) it shall not require special tools or operations as stiff 5 wires, skin incisions or dilitation of the puncture hole, f) it shall be cheap to manufacture.
These demands have according to the invention been fulfilled by the fact that the inside diameter of said front end is likewise reduced or tapering and that the front end is provided with an expandable portion intended to be severed by the catheter at the introduction thereof and to permit the passage of a catheter having an outer diameter exceeding the inside diameter of the front end of the introducer-cannula.
Fig. 1 is a longitudinal section through an introducer-cannula according to the invention.
Fig. 2 is a longitudinal section of the whole device including the needle,
Fig 3 is a longitudinal section according to f g. 2 of another embodiment ,
Fig. 4a-c show schematically in a view from above different steps of the introduction of a catheter through an introducer-cannula according to the invention,
Fig. 5-8 show in perspective the front end of different embodiments of the introducer-cannula according to the invention.
DESCRIPTION OF EMBODIMENTS
The introducer-cannula 10 is manufactured by a stiff plastic material, for example Teflon(R) and has a reduced front end. Alternatively the whole introducer-cannula 10 tapers towards the front end as is shown in fig. 3,6 and 7. The opposite end of the introducer-cannula 10 is shaped as a holder member 11 and is provided with a grip 12 for facilitating the insertion.
A needle 13 is intended to be received within the introducer- cannula as is shown i fig. 2. The reduced front end of the introducer-cannula 10 connects tightly to the needle 13 for facilitating the insertion. Also the needle is provided with a holder member 14 with a grip 15. It would also be possible, as is shown in fig. 3, to give the needle 13 a shape corresponding to the introducer-cannula 10, i.e. a reduced front end or alternatively tapering over its entire length.
The front tip of the introducer-cannula is provided with a slit 16, which either as is shown in fig. 4 extends all the way to said end or as is shown in fig. 1-4 and 6-7 respectively ends shortly before the end. The embodiment shown in fig. 6 is provided with two slits 16 on opposite sides of the introducer-cannula 10. A line of weakness 17 connects to the slit 16, for example a groove, perforation or the like, which extends along the entire introducer-cannula 10 including its holder member 11 and along which the introducer-cannula can be splitted at its withdrawal. In the embodiment according to fig. 8 the introducer-cannula 10 has no slit and is instead provided with a line of weakness 17 extending over its entire length.
The device is used in the following way. The blood-vessel, either a peripheral or central vein or artery, is punctured by means of the tip of the needle 13 and the whole device comprising needle 13 and introducer-cannula 10 is inserted together into the blood-vessel to the desired position. After that the needle 13 is withdrawn. The catheter 18 is then introduced through the introducer-cannula 10, at which the tip of the catheter forces the front end of the introducer-cannula
10 apart, as is illustrated in fig. 4a-c, and the catheter can pass through the introducer-cannula and into the blood-vessel.
The introducer-cannula is easily removed from the catheter by severing it along the line of weakness 17.
The device according to the invention has a number of important advantages:
a) it permits a careful insertion into the blood-vessel with less risk for injuries as compared to most of the previously known methods, b) it can easily be removed from the blood-vessel, c) no risk for damages on the catheter and catheter embolism since the catheter is inserted through a non-sharp Teflon(R)- sleeve, d) it permits the introduction of both soft and stiff catheters , both periperal and central venous catheter and both artery and venous catheters, e) it permits a simple introduction, the introducer-cannula dilates the blood-vessel at the same time and no guide wires, scalpels or the like are needed, f) it is cheap to manufacture.
The invention is of course not limited to the above described and shown embodiments, but can be modified within the scope of the claims.

Claims

10CLAIMS
\ 1. A device for introducing a catheter into a blood-vessel and comprising a needle (13) for puncturing the blood-vessel and an
15 introducer-cannula (10) intended to be introduced into the blood-vessel together with the needle and through which the catheter (18) is intended to be introduced into the blood-vessel after removal of the needle, said introducer-cannula (10) having a front end with a reduced or
20 tapering outer diameter and which tightly connects to the needle ( 1 ) , c h a r a c t e r i z e d i n, that the inside diameter of said front end is likewise reduced or tapering and that the front end is provided with an
25 expandable portion (16) intended to be severed by the catheter (18) at the introduction thereof and to permit the passage of a catheter having an outer diameter exceeding the inside diameter of the front end of the introducer-cannula (10).
30 2. A device according to claim 1 , c h a r a c t e r i z e d i n, that said expandable portion comprises a slit (16).
3. A device according to claim 1 or 2 , 35 . c h a r a c t e r i z e d i n, that in connection to said expandable portion (16) there is arranged a line of weakness (17) extending over the rest of the length of the introducer-cannula (10).
4. A device according to any of the preceding claims, c h a r a c t e r i z e d i n, that the needle (13) is provided ,with a front end having a 05 reduced or tapering diameter corresponding to that of the introducer-cannula (10) .
OMPI
EP19830901267 1982-04-22 1983-04-22 A device for introducing a catheter into a blood-vessel Withdrawn EP0120863A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
WOPCT/SE82/00127 1982-04-22
PCT/SE1982/000127 WO1982003558A1 (en) 1981-04-23 1982-04-22 A device for introducing a catheter-cannula into a blood-vessel
SE8203499A SE8203499L (en) 1982-06-07 1982-06-07 Catheter introducer - has puncture needle in cannula with weakened line for splitting on insertion of catheter
SE8203499 1982-06-07

Publications (1)

Publication Number Publication Date
EP0120863A1 true EP0120863A1 (en) 1984-10-10

Family

ID=26658065

Family Applications (2)

Application Number Title Priority Date Filing Date
EP83850105A Withdrawn EP0093101A3 (en) 1982-04-22 1983-04-22 A device for introducing a catheter into a blood vessel
EP19830901267 Withdrawn EP0120863A1 (en) 1982-04-22 1983-04-22 A device for introducing a catheter into a blood-vessel

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP83850105A Withdrawn EP0093101A3 (en) 1982-04-22 1983-04-22 A device for introducing a catheter into a blood vessel

Country Status (5)

Country Link
EP (2) EP0093101A3 (en)
JP (1) JPS59500749A (en)
AU (1) AU1474183A (en)
DK (1) DK588783A (en)
WO (1) WO1983003766A1 (en)

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US5951514A (en) * 1997-03-07 1999-09-14 Sahota; Harvinder Multi-lobe perfusion balloon
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US8025199B2 (en) 2004-02-23 2011-09-27 Tyco Healthcare Group Lp Surgical cutting and stapling device
US6793652B1 (en) 1999-06-02 2004-09-21 Power Medical Interventions, Inc. Electro-mechanical surgical device
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US8469987B2 (en) 2007-08-09 2013-06-25 Senorx, Inc. Split sheath for trocar assembly
EP2424460B1 (en) 2009-04-30 2017-05-24 Cook Medical Technologies LLC System for fiducial deployment
US9072542B2 (en) 2009-12-18 2015-07-07 Cook Medical Technologies Llc System and method for fiducial deployment
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CN106456213B (en) 2014-06-09 2019-04-12 库克医药技术有限责任公司 Screw drive-type handle and system for primary standard substance deployment
US10363407B2 (en) 2014-06-16 2019-07-30 Cook Medical Technologies Llc Plunger-driven collet handle and system for fiducial deployment
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Also Published As

Publication number Publication date
EP0093101A3 (en) 1984-12-05
AU1474183A (en) 1983-11-21
WO1983003766A1 (en) 1983-11-10
JPS59500749A (en) 1984-05-04
EP0093101A2 (en) 1983-11-02
DK588783D0 (en) 1983-12-21
DK588783A (en) 1983-12-21

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