GB2286968A - Reinforced catheter - Google Patents

Reinforced catheter Download PDF

Info

Publication number
GB2286968A
GB2286968A GB9426413A GB9426413A GB2286968A GB 2286968 A GB2286968 A GB 2286968A GB 9426413 A GB9426413 A GB 9426413A GB 9426413 A GB9426413 A GB 9426413A GB 2286968 A GB2286968 A GB 2286968A
Authority
GB
United Kingdom
Prior art keywords
catheter
end piece
reinforcement
spiral
proximal end
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.)
Granted
Application number
GB9426413A
Other versions
GB2286968B (en
GB9426413D0 (en
Inventor
Raymund Heiliger
Matthias Wilhelm Jansen
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.)
Vygon GmbH and Co KG
Original Assignee
Vygon GmbH and Co KG
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 Vygon GmbH and Co KG filed Critical Vygon GmbH and Co KG
Publication of GB9426413D0 publication Critical patent/GB9426413D0/en
Publication of GB2286968A publication Critical patent/GB2286968A/en
Application granted granted Critical
Publication of GB2286968B publication Critical patent/GB2286968B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A61M39/12—Tube connectors; Tube couplings for joining a flexible tube to a rigid attachment
    • 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
    • A61M2025/0007—Epidural catheters
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A61M2039/1033—Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
    • 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
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/0014—Connecting a tube to a hub
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
    • A61M25/0052—Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Pulmonology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Description

2286968 IMPROVED CATHETER This invention relates to a catheter and more
particularly to a catheter having a flexibility permitting placement of the catheter by means of a Tuohy needle, and having a proximal end piece which can be connected to a supply system by means of a coupling device.
Known catheters of this type are components of a set of anaesthesia instruments, which for epidural anaesthesia is provided with a Tuohy needle via which the distal end of the catheter is introduced into the epidural space. For this purpose the catheter has to be deflected by about 90' to the longitudinal axis of the needle in a relatively tight bend in the region of the radially oriented needle outlet aperture. Since the catheter is required for prolonging the duration of anaesthesia and is also required for imparting postoperative analgesia, the Tuohy needle has to be removable whilst the placement of the catheter is retained. For this purpose the needle is removed via the proximal end of the catheter, the deflection bend of the catheter being constantly displaced over the length of the catheter until the needle has been completely removed. The ability to place the catheter and the ability to remove the Tuohy needle therefore require the catheter to have a high flexibility, which is obtained by manufacturing the catheter from flexible tubular material, such as silicone for example.
2 A coupling piece has to be tightly connected at the proximal end of the catheter which is freed from the Tuohy needle, for the injection of anaesthetics or analgesics. Conventional coupling pieces are constructed as a type of union nut and contain a resilient cylindrical seal with a hole through which the end of the catheter can be passed. The seal is compressed by an insert which is provided with an external thread and which likewise has a hole, so that the internal curved face of the hole of the seal is pressed against the outer face of the catheter. As a consequence of the flexibility of the catheter, which is indispensable for the reasons explained above, there is a risk of the catheter lumen being squashed in the course of this procedure.
It would be desirable to be able to provide a catheter of the type described which, whilst retaining the flexibility required for its passage through a Tuohy needle, is nevertheless prevented from collapsing in the region of a coupling piece.
According to the present invention there is provided a catheter having a flexibility permitting placement of the catheter by means of a Tuohy needle and having a proximal end piece which can be connected to a supply system by means of a coupling device, characterised by a reinforcement extending exclusively over the axial length of the coupling device and keeping the lumen of the end piece open against forces C h directed radially towards the centre line of the catheter.
The reinforcement according to the invention may preferably consist of a spiral in the form of a helicoidal line in the manner of a cylindrical spring, due to which the flexibility is only insignificantly impaired but the radial stiffness of the catheter in the reinforcement region is considerably increased.
Instead of being equipped with a spiral in the form of a helicoidal line, the proximal end piece of the catheter may also advantageously be equipped with a number of rings disposed at successive intervals, which, just like the reinforcement spiral, scarcely impair the flexibility of the catheter but which impar an adequate radial stiffness to the catheter in the connection region of a coupling piece.
The spiral or the rings may consist of spring steel or may be formed from plastic as well, like the catheter, wherein it is essential that the plastic reinforcement material, as distinct from the usual catheter material, is characterised by a significantly greater resistance to deformation.
According to one embodiment of the invention the spiral or the rings are completely integrated in the wall of the catheter end piece, so that the reinforcement results neither in a narrowing of the catheter lumen nor in a thickening which projects radially beyond the outer face of the catheter.
4 According to another embodiment of the invention at least part of a cross- section of the spiral or the rings projects beyond the inner and/or outer face of the wall of the end piece.
In this embodiment a slight narrowing of the catheter lumen or a thickening of the catheter end piece is accepted, which results in the manufacturing advantage that the reinforcement can be attached in a simple manner, e.g. by adhesively bonding it on or bonding it in or by melting it on or melting it in.
A proximal end piece of a catheter according to the invention is illustrated in the drawings, where:
Figure 1 illustrates two coupling pieces, with the catheter end piece already inserted in one coupling piece; and Figures 2 and 3 illustrate, on a larger scale in each case, a catheter end piece with a reinforcement.
The catheter, which has been placed and has been freed from the Tuohy needle, is provided at its proximal end piece 1 with a coupling device 2 of conventional construction. The latter consists firstly of a coupling section 3 which is constructed in the manner of a union nut and which contains a resilient seal insert, which is not illustrated, but which has an axial hole, and consists secondly of a coupling section 4 which is provided with a coaxial passageway and which has an external thread on a projection 5 which can be screwed into the coupling section 3.
1 The end piece I is passed coaxially through the coupling section 3 and through the resilient seal insert situated therein, so that when the coupling sections 3 and 4 are screwed together the projection 5, which increasingly penetrates the coupling section 3, compresses the resilient seal insert and presses the latter around and against the end piece with the formation of a seal.
In order that the catheter lumen is not squashed due to the compression of the seal insert and the forces resulting therefrom which are directed radially towards the centre line of the catheter, the proximal end piece 1 of the catheter is provided with a reinforcement. As shown in Figure 2, this consists of a spiral in the form of a helicoidal line inserted inside the end piece 1, or, as shown in Figure 3, of three rings 7 disposed at successive intervals which terminate flush with the outer face of the catheter.

Claims (6)

6 CLAIMS
1. A catheter having a flexibility permitting placement of the catheter by means of a Tuohy needle and having a proximal end piece which can be connected to a supply system by means of a coupling device, characterised by a reinforcement extending exclusively over the axial length of the coupling device and keeping the lumen of the end piece open against forces directed radially towards the centre line of the catheter.
2. A catheter according to claim 1, characterised in that the proximal end piece is provided with a reinforcement which consists of a spiral.
3. A catheter according to claim 1, characterised in that the proximal end piece is provided with a reinforcement which consists of a number of rings disposed at successive intervals.
4. A catheter according to any one of claims 1 to 3, characterised in that the spiral or the rings is or are completely integrated in the wall of the end piece.
5. A catheter according to any one of claims 1 to 3, characterised in that at least part of a crosssection of the spiral or the rings projects beyond the inner and/or outer face of the wall of the end piece.
f 7
6. A catheter substantially as described with reference to and as illustrated by the accompanying drawings.
GB9426413A 1994-01-28 1994-12-30 Reinforced catheter Expired - Lifetime GB2286968B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944402475 DE4402475C2 (en) 1994-01-28 1994-01-28 Catheter that can be placed using a Tuohy needle

Publications (3)

Publication Number Publication Date
GB9426413D0 GB9426413D0 (en) 1995-03-01
GB2286968A true GB2286968A (en) 1995-09-06
GB2286968B GB2286968B (en) 1997-10-01

Family

ID=6508862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9426413A Expired - Lifetime GB2286968B (en) 1994-01-28 1994-12-30 Reinforced catheter

Country Status (3)

Country Link
DE (1) DE4402475C2 (en)
FR (1) FR2715571B1 (en)
GB (1) GB2286968B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7547302B2 (en) 1999-07-19 2009-06-16 I-Flow Corporation Anti-microbial catheter
US6350253B1 (en) 1999-07-19 2002-02-26 I-Flow Corporation Catheter for uniform delivery of medication
US7004923B2 (en) 1999-07-19 2006-02-28 I-Flow Corporation Catheter for uniform delivery of medication
ES2269378T3 (en) 2000-03-24 2007-04-01 Stephen Brushey CATHETER FOR ANESTHESIA.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653542A (en) * 1980-10-02 1987-03-31 The Kendall Company Medical tubing and connector
US5059375A (en) * 1989-11-13 1991-10-22 Minnesota Mining & Manufacturing Company Apparatus and method for producing kink resistant tubing
WO1993001855A2 (en) * 1991-07-23 1993-02-04 Intermed, Inc. Catheter tube
US5279596A (en) * 1990-07-27 1994-01-18 Cordis Corporation Intravascular catheter with kink resistant tip

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE823320C (en) * 1950-08-15 1951-12-03 Willy Ruesch Catheters, in particular intratracheal catheters and processes for their manufacture
US4932419A (en) * 1988-03-21 1990-06-12 Boston Scientific Corporation Multi-filar, cross-wound coil for medical devices
US4917670A (en) * 1988-03-22 1990-04-17 Hurley Ronald J Continuous spinal anesthesia administering apparatus and method
EP0435518B1 (en) * 1989-12-29 1995-02-15 Med Institute, Inc. A flexible, kink-resistant catheter
IE63252B1 (en) * 1990-01-30 1995-04-05 Bard Connaught A device for use with a catheter
US5358493A (en) * 1993-02-18 1994-10-25 Scimed Life Systems, Inc. Vascular access catheter and methods for manufacture thereof
ES2194896T3 (en) * 1993-11-12 2003-12-01 Micro Interventional Syst SMALL DIAMETER CATHETER WITH ELEVATED PAIR.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653542A (en) * 1980-10-02 1987-03-31 The Kendall Company Medical tubing and connector
US5059375A (en) * 1989-11-13 1991-10-22 Minnesota Mining & Manufacturing Company Apparatus and method for producing kink resistant tubing
US5279596A (en) * 1990-07-27 1994-01-18 Cordis Corporation Intravascular catheter with kink resistant tip
WO1993001855A2 (en) * 1991-07-23 1993-02-04 Intermed, Inc. Catheter tube

Also Published As

Publication number Publication date
DE4402475A1 (en) 1995-08-03
GB2286968B (en) 1997-10-01
FR2715571B1 (en) 1999-02-05
DE4402475C2 (en) 1999-03-25
GB9426413D0 (en) 1995-03-01
FR2715571A1 (en) 1995-08-04

Similar Documents

Publication Publication Date Title
US6544247B1 (en) Introducer system
US6273404B1 (en) Method of making monolithic hub and strain relief
US4668226A (en) Injection needle assembly for endoscope
US6245029B1 (en) Stylet and connector therefor
US6068622A (en) Single piece hub/strain relief that can be injection molded over a shaft
US5330449A (en) Catheter strain relief device
US5795326A (en) Double lumen tubing design for catheter
EP0117093B1 (en) Fused flexible tip catheter
US4960410A (en) Flexible tubular member for catheter construction
CA2135143C (en) Catheter joint with restraining device
US4967732A (en) Endoscope
US4874378A (en) Catheter sheath introducer
AU623093B2 (en) Device for the placing of a partial catheter in a body cavity
EP0102685B1 (en) Blood vessel catheter for medicine delivery and method of manufacture thereof
US5968009A (en) Double lumen tubing design for catheter
CA2084523C (en) Variable stiffness catheter
EP0637453A1 (en) Method for manufacturing a catheter with at least one high-pressure lumen and catheter
TW333460B (en) Kink-free spiral-wound catheter
US20070112335A1 (en) Ureteral access sheath
EP0334509A3 (en) Softening catheter
EP1925332A1 (en) Balloon cover
US5800411A (en) Catheter
JP3675832B2 (en) Stylet device to guide enteral supply tube
US4435176A (en) Needle assembly
GB2286968A (en) Reinforced catheter

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20141229