GB2224801A - Catheters - Google Patents

Catheters Download PDF

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Publication number
GB2224801A
GB2224801A GB8826301A GB8826301A GB2224801A GB 2224801 A GB2224801 A GB 2224801A GB 8826301 A GB8826301 A GB 8826301A GB 8826301 A GB8826301 A GB 8826301A GB 2224801 A GB2224801 A GB 2224801A
Authority
GB
United Kingdom
Prior art keywords
catheter
wall
catheters
microcoaxial
extending longitudinally
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Withdrawn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
GB8826301A
Other versions
GB8826301D0 (en
Inventor
Richard Ian Kitney
Keith Straughan
Martin Terry Rothman
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.)
Circulation Research Ltd
Original Assignee
Circulation Research 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 Circulation Research Ltd filed Critical Circulation Research Ltd
Priority to GB8826301A priority Critical patent/GB2224801A/en
Publication of GB8826301D0 publication Critical patent/GB8826301D0/en
Priority to PCT/GB1990/000749 priority patent/WO1991017785A1/en
Publication of GB2224801A publication Critical patent/GB2224801A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4483—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer
    • A61B8/4488—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer the transducer being a phased array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Radiology & Medical Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Gynecology & Obstetrics (AREA)
  • Mechanical Engineering (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

A catheter of the kind that is provided with one or more electrical conductors 3, 4 running along its length is characterised in that at least one of the electrical conductors is embedded in the wall 1 of the catheter. <IMAGE>

Description

CATHETERS The present invention relates to catheters generally and in particular to catheters which are suitable for use with the system disclosed in our copending UK Patent Application No. 8726440.
In that co-pending patent application a catheter having the following features is disclosed: (a) a probe carried at one end of the catheter; (b) an ultrasonic transducer arrangement in the form of an annular assembly of transducer elements which encircle the probe at or near one of its ends; and (c) means to electrically connect the transducer elements to the other end of the catheter, which means either incorporates a multiplexing/ demultiplexing circuit as such or comprises a wiring arrangement which has the effect of acting in a multiplexing or demultiplexing way, the purpose of either the circuit or the arrangement being to reduce the number of wires which run the length of the catheter.
There can be other situations in which it is desired to run electrical leads the length of the catheter in order to energise some item carried at the distal end of the catheter or to receive signals generated at the distal end, the distal end being that which is within the patient and remote from the socalled proximal end which would in use be manipulated by the medical practitioner.
In such situations there can be problems in accommodating the electrical leads given the small diameter of the catheter. Normally such leads pass down the central "lumen" or bore of the hollow catheter.
As indicated earlier in connection with our co-pending UK Patent Application No. 8714450 the number of wires can be reduced by employing a multiplexing/demultiplexing arrangement.
According to the present invention a catheter has at least one electrical lead extending longitudinally thereof within the wall of the catheter tube.
How the invention may be carried out will now be described by way of example only and with reference to the single figure of the accompanying drawing which is a fragmentary enlarged cross-sectional view of a catheter constructed according to the present invention.
A catheter comprises a tube 1 made of a suitable thermoplastic material such as Nylon (Registered Trade Mark), which tube 1 defines a central "lumen" or bore 2.
Alternatively the catheter could have a number of mutually parallel lumens as illustrated in Figures 5A, 5B and 5C of our co-pending UK Patent Application No. 8714450. As described in the patent specification of that application the various lumens are provided for different purposes associated with a particular clinical use to which the catheter is to be put.
In the catheter illustrated in the present application microcoaxial wires 3 and 4 are embedded in the material of the catheter wall 1.
Each microcoaxial wire consists of outer conductor 3a and 4a respectively and an inner or central conductor 3b and 4b respectively. The inner and outer conductors are electrically insulated from one another by the material la and lob of the wall 1 of the catheter. The material It between the adjacent microcoaxial cables also electrically insulates each microcoaxial cable from the next adjacent microcoaxial cable.
By this arrangement it is possible to either accommodate more electrical conductors within a given diameter of catheter or alternatively for a given number of electrical conductors to reduce the overall diameter of a given catheter.
Clearly any number of microcoaxial cables could be incorporated in the wall of the catheter, within tne physical limits involved.
Furthermore the electrical leads need not be coaxial cables but could be single wires.

Claims (5)

1. A catheter has at least one electrical lead extending longitudinally thereof within the wall of the catheter tube.
2. A catheter as claimed in claim 1 in which the electrical conductor is a coaxial cable.
3. A catheter as claimed in claim 2 in which the material of the wall is also between the central and outer conductors of the coaxial cable in order to electrically insulate the inner and outer conductors from one another.
4. A catheter as claimed in any one of the claims 1 to 3 which includes a plurality of coaxial cables extending longitudinally of the catheter within the wall thereof.
5. A catheter substantially as hereinbefore described with a reference to and shown in the accompanying drawing.
GB8826301A 1988-11-10 1988-11-10 Catheters Withdrawn GB2224801A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8826301A GB2224801A (en) 1988-11-10 1988-11-10 Catheters
PCT/GB1990/000749 WO1991017785A1 (en) 1988-11-10 1990-05-15 Catheters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8826301A GB2224801A (en) 1988-11-10 1988-11-10 Catheters

Publications (2)

Publication Number Publication Date
GB8826301D0 GB8826301D0 (en) 1988-12-14
GB2224801A true GB2224801A (en) 1990-05-16

Family

ID=10646632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8826301A Withdrawn GB2224801A (en) 1988-11-10 1988-11-10 Catheters

Country Status (2)

Country Link
GB (1) GB2224801A (en)
WO (1) WO1991017785A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714708A1 (en) * 1994-01-05 1995-07-07 Giat Ind Sa Flexible tubular fuel conduit including data transmission cable for aeroplane

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274736A (en) * 1993-01-28 1994-08-03 Intravascular Res Ltd A micro-coaxial cable
US5453575A (en) * 1993-02-01 1995-09-26 Endosonics Corporation Apparatus and method for detecting blood flow in intravascular ultrasonic imaging
SE0203108D0 (en) * 2002-10-22 2002-10-22 Siemens Elema Ab Multi-Electrode Catheter
JP2014040906A (en) * 2012-07-26 2014-03-06 Tatsuta Electric Wire & Cable Co Ltd Tube cable

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809112A (en) * 1954-05-19 1959-02-18 Alfa Laval Co Ltd Improvements in flexible tubes
GB1160805A (en) * 1967-07-08 1969-08-06 Engl Ltd J Improvements in or relating to Flexible Conduits
GB1176765A (en) * 1967-06-24 1970-01-07 Aristovoulos George Petzetakis Hoses.
GB1427134A (en) * 1972-01-21 1976-03-10 Nat Res Dev Catheters
GB1445678A (en) * 1972-06-30 1976-08-11 Secr Social Service Brit Clinical device comprising a catheter
WO1981000676A1 (en) * 1979-09-13 1981-03-19 H Neumann Catheter,particularly vein catheter
EP0173266A2 (en) * 1984-08-24 1986-03-05 Sumitomo Electric Industries Limited Composite optical waveguide and production of the same
US4608986A (en) * 1984-10-01 1986-09-02 Cordis Corporation Pacing lead with straight wire conductors
GB2197419A (en) * 1986-09-25 1988-05-18 Raychem Gmbh Conduit with heater strip

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669095A (en) * 1966-08-25 1972-06-13 Tokyo Shibaura Electric Co Catheter-type semi-conductor radiation detector for insertion into a human body
US3779234A (en) * 1971-06-30 1973-12-18 Intersc Res Inst Ultrasonic catheter with rotating transducers
US4319580A (en) * 1979-08-28 1982-03-16 The Board Of Regents Of The University Of Washington Method for detecting air emboli in the blood in an intracorporeal blood vessel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809112A (en) * 1954-05-19 1959-02-18 Alfa Laval Co Ltd Improvements in flexible tubes
GB1176765A (en) * 1967-06-24 1970-01-07 Aristovoulos George Petzetakis Hoses.
GB1160805A (en) * 1967-07-08 1969-08-06 Engl Ltd J Improvements in or relating to Flexible Conduits
GB1427134A (en) * 1972-01-21 1976-03-10 Nat Res Dev Catheters
GB1445678A (en) * 1972-06-30 1976-08-11 Secr Social Service Brit Clinical device comprising a catheter
WO1981000676A1 (en) * 1979-09-13 1981-03-19 H Neumann Catheter,particularly vein catheter
EP0173266A2 (en) * 1984-08-24 1986-03-05 Sumitomo Electric Industries Limited Composite optical waveguide and production of the same
US4608986A (en) * 1984-10-01 1986-09-02 Cordis Corporation Pacing lead with straight wire conductors
GB2197419A (en) * 1986-09-25 1988-05-18 Raychem Gmbh Conduit with heater strip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714708A1 (en) * 1994-01-05 1995-07-07 Giat Ind Sa Flexible tubular fuel conduit including data transmission cable for aeroplane

Also Published As

Publication number Publication date
WO1991017785A1 (en) 1991-11-28
GB8826301D0 (en) 1988-12-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)