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WO1991000118A1 - Balloon catheter for canalization of occluded blood vessels - Google Patents

Balloon catheter for canalization of occluded blood vessels Download PDF

Info

Publication number
WO1991000118A1
WO1991000118A1 PCT/SE1990/000297 SE9000297W WO9100118A1 WO 1991000118 A1 WO1991000118 A1 WO 1991000118A1 SE 9000297 W SE9000297 W SE 9000297W WO 9100118 A1 WO9100118 A1 WO 9100118A1
Authority
WO
WIPO (PCT)
Prior art keywords
balloon
catheter
unit
distal
balloon unit
Prior art date
Application number
PCT/SE1990/000297
Other languages
French (fr)
Inventor
Lars-Erik LÖRELIUS
Original Assignee
Medical Innovation I Uppsala Ab
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 Medical Innovation I Uppsala Ab filed Critical Medical Innovation I Uppsala Ab
Publication of WO1991000118A1 publication Critical patent/WO1991000118A1/en

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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
    • A61M25/10—Balloon catheters
    • A61M25/104—Balloon catheters used for angioplasty
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • 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
    • A61M25/10—Balloon catheters
    • A61M25/1027—Making of balloon catheters
    • A61M25/1034—Joining of shaft and balloon
    • 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
    • A61M25/10—Balloon catheters
    • A61M25/1027—Making of balloon catheters
    • A61M25/1038—Wrapping or folding devices for use with balloon catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22051—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
    • A61B2017/22062—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation to be filled with liquid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00059—Material properties
    • A61B2018/00089—Thermal conductivity
    • A61B2018/00101—Thermal conductivity low, i.e. thermally insulating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B2018/044—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid
    • A61B2018/046—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid in liquid form
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A61B2090/3933—Liquid markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F2007/0054—Heating or cooling appliances for medical or therapeutic treatment of the human body with a closed fluid circuit, e.g. hot water
    • 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
    • A61M25/10—Balloon catheters
    • A61M25/1027—Making of balloon catheters
    • A61M25/1029—Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
    • A61M2025/1031—Surface processing of balloon members, e.g. coating or deposition; Mounting additional parts onto the balloon member's surface
    • 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
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1086—Balloon catheters with special features or adapted for special applications having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves

Definitions

  • the present invention relates to a balloon catheter for ca ⁇ nalization of occluded blood vessels.
  • Occluded blood vessels are opened, i.e. canalized, by using several different methods.
  • One of these methods is balloon dilatation combined with laser irradiation. Compare, for example, EP-A-182 689 (corresponding to US-A-4 799 479 ) in the name of Spears.
  • the process comprises introduc ⁇ tion of a so called guide wire into the vessel system to be subsequently guided to and through the occluded vessel portion. Thereafter a balloon catheter is threaded over the guide wire and is fed over by the guide wire to the occluded portion. Thereafter, the balloon unit is pressurized by liquid causing the vessel to expand and a canalization effect to take place.
  • the vessel is coagulated by irradiation with laser light from an argon laser.
  • the laser light is conducted into the balloon unit by means of a light conductor and is spread radially towards the walls of the vessel.
  • This known technique is subject to several disadvantages.
  • the laser unit is expensive and limits the field of use of the method.
  • the laser irradia ⁇ tion involves high energy and, for this reason, the known process is hampered by a number of security rules such as the requirement that all persons within the operation room includ ⁇ ing the patient have to wear protective glasses.
  • the operation room must be well ventilated and no persons are pe itted to enter the operation room while the operation is being per ⁇ formed.
  • Another purpose of the invention is to provide a balloon cathether which thermally acts on the wall of the blood vessel but does not cause the blood in the blood vessel to coagulate.
  • the heat insulating means of the balloon unit are a reflecting layer provided on the end surfaces of the balloon unit, in particular the insides of the end surfaces.
  • an air- filled chamber serving as heat insulation is provided at both the proximal and the distal ends of the balloon unit.
  • An additional advantage of the invention is obtained by adding an X-ray contrast material to the hot liquid. This enables the surgeon to exactly detect the postion of the balloon catheter in the vessel.
  • Figure 1 is a longitudinal section of a balloon catheter according to a first embodiment of the invention
  • Figure 2 is a transverse sectional view along the line II-II in Figure 1,
  • Figure 3 is a longitudinal section a second embodiment of the balloon catheter according to the present invention.
  • Figure 4 is a cross-sectional view along the line IV-IV in Figure 3,
  • Figure 5 is a longitudinal section of a third embodiment of the balloon catheter in accordance with the present invention.
  • Figure 6 shows a cross-section of the balloon catheter according to Figure 4 in a non-pressurized condition
  • Figure 7 shows a cross-section of the balloon catheter according to Figure 1 in pressurized condition.
  • Figure 1 shows a balloon catheter comprising a catheter tube 1 and a longitudinally extending balloon unit 2 provided at the distal end of the catheter. Axially of the catheter tube extends a lumen 3 which via an opening 4 in the wall surface of the catheter tube communicates with the inner space 3 of the balloon unit.
  • Figures 1 and 7 show the balloon unit in extended, i.e. pressurized, position subsequently designated as working position, while Figure 6 shows the balloon unit in a non-pressurized evacuated position i.e. the condition adopted by the balloon unit during its insertion into the blood vessel 6, the occluded portion 7 of which is to be opened.
  • a guide wire 8 has been guided to the occluded portion 7 and thereafter the balloon catheter has been slipped on to the guide wire and manually fed forward to the occluded portion through the blood vessel system of the patient.
  • the distal portion of the catheter tube 1 has a conical front portion 9.
  • the balloon unit 2 In the dilated state, the balloon unit 2 has an axially extended cylindrical section 10, a distal end section 11 and a proximal end setion 12.
  • the evacuated inner space 5 is to be filled with hot, possibly pressurized liquid through lumen 3.
  • the cylindrical section 10 in the working position of the balloon catheter has a flat outward surface and is manufactured of heat-conducting material so that an intimate heat-transferring contact is obtained between the cylindrical section 10 and the inner surface of the blood vessel 6.
  • the heat content of the hot liquid causes the wall surface of the blood vessel to thermally coagulate with the result that the heat treatment provides for the wall surface of the blood vessel to smooth out, thus promoting the circulation.
  • heat insulating means are provided in the form of a reflective layer 13 and a reflective layer 14 provided at the respective distal and proximal end sections 11, 12 of the balloon unit.
  • the reflective layer provided on the inner surface of the balloon unit serves as a heat insulation by exploiting the so-called thermo effect.
  • the thermo effect may be intensified by providing also the outer surface of the end sections 11 and 12 with a reflective coating as indicated by the brooken lines 15, 16.
  • the reflective coating may for example be silver, aluminium or gold applied for example by painting, vacuum deposition, glueing or welding.
  • FIG 3 there is shown another embodiment of the balloon catheter according to the invention.
  • the embodiment is distin ⁇ guished from the embodiment shown in Figure 1 by the fact that the heat insulating means are in the form of an air- filled distal chamber 17 and an air-filled proximal chamber 18.
  • the distal chamber 17 is formed by a concentric wall 19 sloping in relation to the longitudinal axis of the catheter tube and having an annular distal edge surface 20 sealingly anchored at a distal portion 21 of the catheter tube.
  • This distal portion 21 is situated ahead of, e.g. distally in relation to a first portion 22 situated ahead of the distal end section 11 of the balloon unit.
  • An annular proximal end surface 23 of the wall 19 is sealingly anchored at a radially outer portion 24 of the distal end section 11 of the balloon unit.
  • the proximal chamber 18 is formed by a concentric wall 25 inclined in relation to the longitudinal axis of the catheter tube having an annular proximal edge surface 26 sealingly anchored around a portion 27 of the catheter tube.
  • This proximal portion 27 is situated at the proximal end of the portion 28 situated behind the proximal end section 12 of the balloon unit.
  • An annular distal end surface 29 of the wall 25 is sealingly anchored at a radially outer portion 30 of the proximal end section 12 of the balloon unit.
  • a lumen 31 is in communicating connection with chambers 17 and 18.
  • a lumen 3 is in communicating connection with an air source and a lumen 31 communicates with a source of hot liquid.
  • Figure 5 shows a modification of the embodiment according to Figure 1.
  • the lumen 3 for supplying hot water to the inner space 5 extends to the distal portion of the space where it passes through the wall of the catheter tube at a wall opening 34.
  • the hot liquid supplied in this way flows in a backward direction and is discharged through a wall opening 35 at the proximal end of the balloon unit 2.
  • An additional lumen 36 is connected to this wall opening 35 to discharge the hot liquid. Thanks to this embodiment hot liquid may be circulated through the inner space 5 of the balloon unit exposing the vessel to a particularly effective thermal action.
  • This embodiment is suitable for thermo-coagulation and the volume 5 is small and the liquid is cooled by the human body.
  • X-ray contrast substance is added to the hot liquid enabling the operator to control easily the position of the balloon catheter in the blood vessel.
  • the hot liquid is preferably an X-ray contrast solution having a temperature in an approximative range from 50° to 90°C.
  • the hot liquid may be a salt solution, a blood substitute such as dextran, or other bio-compatible liquids.
  • hydrogen or nitrogen gas or mixtures thereof may be used.
  • the distal and proximal end sections 11, 12 may comprise particles of heat insulating material mixed into the end sections 11, 12.
  • end sections 11, 12 may be manufactured of a flexible material having heat insulating properties.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Child & Adolescent Psychology (AREA)
  • Vascular Medicine (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

A balloon catheter for canalizing occluded blood vessels comprising a catheter tube (1), a longitudinally extending balloon unit (2) having a longitudinally extending cylindrical section (10) and two end sections (11, 12). The invention is characterized by heat insulating means (13-16) provided at the end sections (11, 12) of the balloon unit as well as by the fact that the cylindrical section (10) is manufactured of heat-conducting material. Hot liquid, possible with the addition of X-ray contrast material, is introduced through said lumen to the internal space enabling the wall surface of a blood vessel (6) to be exposed to thermal action.

Description

Balloon catheter for canalization of occluded blood vessels
The present invention relates to a balloon catheter for ca¬ nalization of occluded blood vessels.
Occluded blood vessels are opened, i.e. canalized, by using several different methods. One of these methods is balloon dilatation combined with laser irradiation. Compare, for example, EP-A-182 689 (corresponding to US-A-4 799 479 ) in the name of Spears. Briefly, the process comprises introduc¬ tion of a so called guide wire into the vessel system to be subsequently guided to and through the occluded vessel portion. Thereafter a balloon catheter is threaded over the guide wire and is fed over by the guide wire to the occluded portion. Thereafter, the balloon unit is pressurized by liquid causing the vessel to expand and a canalization effect to take place. Thereafter the matter which previously had occluded the vessel is coagulated by irradiation with laser light from an argon laser. The laser light is conducted into the balloon unit by means of a light conductor and is spread radially towards the walls of the vessel. This known technique is subject to several disadvantages. The laser unit is expensive and limits the field of use of the method. The laser irradia¬ tion involves high energy and, for this reason, the known process is hampered by a number of security rules such as the requirement that all persons within the operation room includ¬ ing the patient have to wear protective glasses. The operation room must be well ventilated and no persons are pe itted to enter the operation room while the operation is being per¬ formed.
Canalization of occluded blood vessels by using a balloon catheter pressurized in a pulsating mode by using water is known from EP-A-83870 (corresponding to US-A-4 446 867).
It is a purpose of the present invention to provide a balloon catheter for canalization of occluded blood vessels, said catheter not being subject to disadvantages of the known device and avoiding the use of laser irradiation. It is a purpose of the invention to produce a balloon catheter permitting elimination of occluding matter by thermal action using a hot fluid.
Another purpose of the invention is to provide a balloon cathether which thermally acts on the wall of the blood vessel but does not cause the blood in the blood vessel to coagulate.
It is another purpose of the invention to produce a balloon catheter which during thermal action on the wall of the blood vessel leaves behind a flat surface on the vessel wall.
The features characterizing the invention appear from the attached claims.
According to a perferred embodiment of the invention the heat insulating means of the balloon unit are a reflecting layer provided on the end surfaces of the balloon unit, in particular the insides of the end surfaces.
According to another embodiment of the invention an air- filled chamber serving as heat insulation is provided at both the proximal and the distal ends of the balloon unit. An additional advantage of the invention is obtained by adding an X-ray contrast material to the hot liquid. This enables the surgeon to exactly detect the postion of the balloon catheter in the vessel.
In the following, the invention will be described in detail by reference to the attached drawings in which
Figure 1 is a longitudinal section of a balloon catheter according to a first embodiment of the invention,
Figure 2 is a transverse sectional view along the line II-II in Figure 1,
Figure 3 is a longitudinal section a second embodiment of the balloon catheter according to the present invention,
Figure 4 is a cross-sectional view along the line IV-IV in Figure 3,
Figure 5 is a longitudinal section of a third embodiment of the balloon catheter in accordance with the present invention,
Figure 6 shows a cross-section of the balloon catheter according to Figure 4 in a non-pressurized condition and
Figure 7 shows a cross-section of the balloon catheter according to Figure 1 in pressurized condition.
Figure 1 shows a balloon catheter comprising a catheter tube 1 and a longitudinally extending balloon unit 2 provided at the distal end of the catheter. Axially of the catheter tube extends a lumen 3 which via an opening 4 in the wall surface of the catheter tube communicates with the inner space 3 of the balloon unit. Figures 1 and 7 show the balloon unit in extended, i.e. pressurized, position subsequently designated as working position, while Figure 6 shows the balloon unit in a non-pressurized evacuated position i.e. the condition adopted by the balloon unit during its insertion into the blood vessel 6, the occluded portion 7 of which is to be opened. By manipulation, a guide wire 8 has been guided to the occluded portion 7 and thereafter the balloon catheter has been slipped on to the guide wire and manually fed forward to the occluded portion through the blood vessel system of the patient. The distal portion of the catheter tube 1 has a conical front portion 9.
In the dilated state, the balloon unit 2 has an axially extended cylindrical section 10, a distal end section 11 and a proximal end setion 12. According to the invention, the evacuated inner space 5 is to be filled with hot, possibly pressurized liquid through lumen 3. According to the invention, the cylindrical section 10 in the working position of the balloon catheter has a flat outward surface and is manufactured of heat-conducting material so that an intimate heat-transferring contact is obtained between the cylindrical section 10 and the inner surface of the blood vessel 6. The heat content of the hot liquid causes the wall surface of the blood vessel to thermally coagulate with the result that the heat treatment provides for the wall surface of the blood vessel to smooth out, thus promoting the circulation. To prevent the hot liquid from causing the blood in the blood vessel to coagulate, heat insulating means are provided in the form of a reflective layer 13 and a reflective layer 14 provided at the respective distal and proximal end sections 11, 12 of the balloon unit. The reflective layer provided on the inner surface of the balloon unit serves as a heat insulation by exploiting the so-called thermo effect. The thermo effect may be intensified by providing also the outer surface of the end sections 11 and 12 with a reflective coating as indicated by the brooken lines 15, 16.
The reflective coating may for example be silver, aluminium or gold applied for example by painting, vacuum deposition, glueing or welding.
In Figure 3 there is shown another embodiment of the balloon catheter according to the invention. The embodiment is distin¬ guished from the embodiment shown in Figure 1 by the fact that the heat insulating means are in the form of an air- filled distal chamber 17 and an air-filled proximal chamber 18. The distal chamber 17 is formed by a concentric wall 19 sloping in relation to the longitudinal axis of the catheter tube and having an annular distal edge surface 20 sealingly anchored at a distal portion 21 of the catheter tube. This distal portion 21 is situated ahead of, e.g. distally in relation to a first portion 22 situated ahead of the distal end section 11 of the balloon unit. An annular proximal end surface 23 of the wall 19 is sealingly anchored at a radially outer portion 24 of the distal end section 11 of the balloon unit. In the same way the proximal chamber 18 is formed by a concentric wall 25 inclined in relation to the longitudinal axis of the catheter tube having an annular proximal edge surface 26 sealingly anchored around a portion 27 of the catheter tube. This proximal portion 27 is situated at the proximal end of the portion 28 situated behind the proximal end section 12 of the balloon unit. An annular distal end surface 29 of the wall 25 is sealingly anchored at a radially outer portion 30 of the proximal end section 12 of the balloon unit. Via openings 32 and 33 in the wall of the catheter tube a lumen 31 is in communicating connection with chambers 17 and 18. In a way not shown in the drawings, a lumen 3 is in communicating connection with an air source and a lumen 31 communicates with a source of hot liquid.
Figure 5 shows a modification of the embodiment according to Figure 1. The lumen 3 for supplying hot water to the inner space 5 extends to the distal portion of the space where it passes through the wall of the catheter tube at a wall opening 34. The hot liquid supplied in this way flows in a backward direction and is discharged through a wall opening 35 at the proximal end of the balloon unit 2. An additional lumen 36 is connected to this wall opening 35 to discharge the hot liquid. Thanks to this embodiment hot liquid may be circulated through the inner space 5 of the balloon unit exposing the vessel to a particularly effective thermal action. This embodiment is suitable for thermo-coagulation and the volume 5 is small and the liquid is cooled by the human body.
According to a preferred embodiment of the invention, X-ray contrast substance is added to the hot liquid enabling the operator to control easily the position of the balloon catheter in the blood vessel. The hot liquid is preferably an X-ray contrast solution having a temperature in an approximative range from 50° to 90°C. The embodiments of the invention described above may be modified and varied in many ways. Rather than being an X-ray contrast solution, the hot liquid may be a salt solution, a blood substitute such as dextran, or other bio-compatible liquids. Instead of using air as the heat insulating material in chambers 17 and 18, hydrogen or nitrogen gas or mixtures thereof may be used. In place of or as a complement to the reflective coatings 13-16, the distal and proximal end sections 11, 12 may comprise particles of heat insulating material mixed into the end sections 11, 12. Alternatively, end sections 11, 12 may be manufactured of a flexible material having heat insulating properties.

Claims

WHAT I CLAIM IS :
1. Balloon catheter for canalization of occluded blood vessels (6) comprising a catheter tube (1), a longitudinally extended balloon unit (2) disposed at the distal end of the catheter tube coaxially with the catheter tube and having in the pressurized state of the balloon unit a substantially flat cylindrical section (10) and two end sections (11, 12), a lumen (3) provided axially within the catheter tube and in fluid-tight connection with the balloon unit, characterized by heat insulating means (13-16; 17-18) provided at the distal and proximal end sections (11, 12) of the balloon unit, the flat cylindrical section (10) of the balloon unit being manufactured of heat-conducting material and, said lumen serving to supply hot liquid to the balloon unit to bring about thermal coagulation of the wall of the blood vessel.
2. Balloon catheter as claimed in claim 1, characterized in that said heat insulating means comprise a reflective coating (13, 14) provided on the inside of the end sections (11, 12) of the balloon unit.
3. Balloon catheter as claimed in claim 2, characterized in that said heat insulating means comprise a reflective coating (15, 16) provided outwardly on the end sections (11, 12) of the balloon unit.
4. Balloon catheter as claimed in claim 1, characterized in that said heat insulating means comprise a distal chamber (17) situated ahead of the distal end section (11) of the ballon unit and adjacent thereto, a proximal chamber (18) provided behind the proximal end section (12) of the balloon unit and adjacent thereto. and a second lumen (31) provided axially within the catheter tube and in open connection with both the distal and the proximal chambers (17, 18), said second lumen (31) serving to conduct a gaseous fluid acting as heat insulating material.
5. Balloon catheter as claimed in claim 4, characterized in that the distal chamber (17) is formed by a first section (22) of the catheter tube situated ahead of the balloon unit, the distal end section (11) of the balloon unit, and a wall (19) concentric with the catheter tube and inclined in relation to the longitudinal axis of the catheter tube and having an annular distal edge surface (20) sealingly anchored at the distal portion (21) of the first section and having an angular proximal end surface (2, 3) sealingly anchored at the radially outer portion (24) of the distal end section (11) of the balloon unit.
6. Balloon catheter as claimed in claim 4, characterized in that the proximal chamber (18) is formed by a second section (28) of the catheter tube situated proximally in relation to the balloon unit, the proximal end section (12) of the balloon unit, and another wall (25) concentric with the catheter tube and inclined in relation to the longitudinal axis of the catheter tube having an angular proximal edge surface (26) sealingly anchored at the proximal portion (27) of the second section (28) and having an angular distal end surface (29) sealingly anchored at a radially outer portion (30) of the proximal end section (12) of the balloon unit.
7. Balloon catheter as claimed in claim 1, characterized in that said heat insulating means comprise particles of heat insulating material embedded in the end sections (11, 12).
8. Balloon catheter as claimed in claim 1, characterized in that the end sections (11, 12) are manufactured of a flexible material having heat-insulating properties.
9. Balloon.catheter as claimed in claim 1, characterized in that said lumen (3) for supplying hot liquid to the ballαon unit is connected to a wall opening (34) situated in the distal portion of the internal space (5) of the balloon unit and that an additional lumen (36) is connected to a wall opening (35) situated in the proximal portion of the internal space (5) of the balloon unit, permitting hot liquid to be circulated through the internal space.
PCT/SE1990/000297 1989-06-26 1990-05-07 Balloon catheter for canalization of occluded blood vessels WO1991000118A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902307-1 1989-06-26
SE8902307A SE463960B (en) 1989-06-26 1989-06-26 BALLOON CATS FOR CHANNELING OF OCCLUDED BLOOD CEREALS

Publications (1)

Publication Number Publication Date
WO1991000118A1 true WO1991000118A1 (en) 1991-01-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1990/000297 WO1991000118A1 (en) 1989-06-26 1990-05-07 Balloon catheter for canalization of occluded blood vessels

Country Status (3)

Country Link
AU (1) AU5844090A (en)
SE (1) SE463960B (en)
WO (1) WO1991000118A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993004727A1 (en) * 1991-08-30 1993-03-18 American Medical Systems Balloon-catheter
WO1994019046A1 (en) * 1993-02-26 1994-09-01 Leif Nilsson A catheter comprised of or including electrically conductive synthetic material
EP0678006A4 (en) * 1991-05-03 1994-10-24 Milton H Goldrath Endometrium coagulating apparatus and surgical method for thermal destruction of the endometrium.
WO1996026695A3 (en) * 1995-03-01 1996-10-10 Atos Medical Ab Device for hyperthermia treatment
US6402720B1 (en) * 1997-12-22 2002-06-11 Cordis Corporation Balloon catheter with elongated flexible tip
EP1207801A4 (en) * 1999-08-20 2003-05-02 Radiant Medical Inc Heat exchange catheter with discrete heat exchange elements
DE102013104020A1 (en) * 2013-04-22 2014-10-23 Acandis Gmbh & Co. Kg Medical catheter, in particular for the supply of medical instruments, and treatment system with such a catheter
WO2018028805A1 (en) 2016-08-12 2018-02-15 Medical Development Technologies S.A. Blood-flow interrupting means for insulating an implant device for ablation
DE102013104021B4 (en) 2013-04-22 2022-01-20 Adceris Gmbh & Co. Kg Medical catheter for endovascular tempering of blood, treatment system and manufacturing process
WO2022147611A1 (en) * 2021-01-05 2022-07-14 Cosm Medical Corp. Methods and systems for vaginal therapeutic device fitting

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182689A2 (en) * 1984-10-24 1986-05-28 The Beth Israel Hospital Association Apparatus for angioplasty
EP0205851A1 (en) * 1985-05-10 1986-12-30 Max Dr. Hubmann Catheter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182689A2 (en) * 1984-10-24 1986-05-28 The Beth Israel Hospital Association Apparatus for angioplasty
EP0205851A1 (en) * 1985-05-10 1986-12-30 Max Dr. Hubmann Catheter

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678006A4 (en) * 1991-05-03 1994-10-24 Milton H Goldrath Endometrium coagulating apparatus and surgical method for thermal destruction of the endometrium.
WO1993004727A1 (en) * 1991-08-30 1993-03-18 American Medical Systems Balloon-catheter
US5707367A (en) * 1993-02-26 1998-01-13 Nilsson; Leif Catheter comprised of or including electrically conductive synthetic material
WO1994019046A1 (en) * 1993-02-26 1994-09-01 Leif Nilsson A catheter comprised of or including electrically conductive synthetic material
AU681381B2 (en) * 1993-02-26 1997-08-28 Leif Nilsson A catheter comprised of or including electrically conductive synthetic material
US6224591B1 (en) 1995-03-01 2001-05-01 Atos Medical Ab Device and method for hyperthermia treatment
WO1996026695A3 (en) * 1995-03-01 1996-10-10 Atos Medical Ab Device for hyperthermia treatment
US6402720B1 (en) * 1997-12-22 2002-06-11 Cordis Corporation Balloon catheter with elongated flexible tip
EP1207801A4 (en) * 1999-08-20 2003-05-02 Radiant Medical Inc Heat exchange catheter with discrete heat exchange elements
DE102013104020A1 (en) * 2013-04-22 2014-10-23 Acandis Gmbh & Co. Kg Medical catheter, in particular for the supply of medical instruments, and treatment system with such a catheter
DE102013104020B4 (en) 2013-04-22 2022-01-20 Acandis Gmbh Medical catheter for supplying medical instruments and treatment system with such a catheter
DE102013104021B4 (en) 2013-04-22 2022-01-20 Adceris Gmbh & Co. Kg Medical catheter for endovascular tempering of blood, treatment system and manufacturing process
WO2018028805A1 (en) 2016-08-12 2018-02-15 Medical Development Technologies S.A. Blood-flow interrupting means for insulating an implant device for ablation
WO2022147611A1 (en) * 2021-01-05 2022-07-14 Cosm Medical Corp. Methods and systems for vaginal therapeutic device fitting

Also Published As

Publication number Publication date
SE463960B (en) 1991-02-18
SE8902307L (en) 1990-12-27
SE8902307D0 (en) 1989-06-26
AU5844090A (en) 1991-01-17

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