Stent deploying catheter system and balloon catheter
OwnerJeong S. Lee, Florencia Lim +1inventors
InventorsJeong S. Lee, Florencia Lim, Debashis Dutta
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Abstract
An intravascular catheter system for properly implanting a stent in a body lumen generally comprising a catheter having an elongated shaft with an inflatable balloon formed of compliant material and a stent mounted on the working length of the balloon. The balloon material is compliant within the working range of the balloon to provide substantial radial expansion. The wingless radially expansive balloon expands in a uniform manner, thereby producing uniform expansion and implantation of the stent. Another embodiment is directed to a balloon catheter having a semi-compliant balloon formed at least in part of a block copolymer.
Claims42
A catheter system for implanting a stent in a patient's body comprising:
- a) a catheter having an elongated shaft with proximal and distal ends and an inflation lumen extending within at least a portion of a distal shaft section to a location spaced proximally from the distal end;
- b) an essentially wingless radially expansive uninflated balloon formed of compliant polymeric material, mounted on the distal section of the catheter shaft, with an interior chamber in fluid communication with the inflation lumen;
- and
- c) an expandable stent disposed about and mounted onto the uninflated balloon so that radial expansion of the balloon within the working range expands the stent mounted thereon and implants the stent in the body.
A method of implanting a stent within a patient's body, comprising:
- a) providing a catheter system for implanting a stent in a patient's body, comprising:
- i) a catheter having an elongated shaft with proximal and distal ends and an inflation lumen extending within at least a distal shaft section to a location spaced proximally from the distal end;
- ii) an essentially wingless radially expansive uninflated balloon formed of compliant polymeric material, mounted on the distal section of the catheter shaft, with an interior chamber in fluid communication with the inflation lumen;
- and
- iii) an expandable stent disposed about and mounted onto the uninflated balloon so that radial expansion of the balloon within the working range expands the stent mounted thereon and implants the stent in the body;
- b) inserting the catheter system into the patient's body;
- c) inflating the balloon to produce uniform radial expansion of the balloon and the stent mounted thereon;
- and
- d) radially retracting the balloon to a wingless shape and removing the catheter from the patient's body, with the stent remaining within the patient's body.
A balloon catheter, comprising
- a) an elongated shaft having a proximal end, a distal end, and at least one lumen therein;
- and
- b) a semi-compliant balloon formed at least in part of a polyurethane block copolymer.
A balloon catheter, comprising
- a) an elongated shaft having a proximal end, a distal end, and at least one lumen therein;
- and
- b) an axially noncompliant balloon formed at least in part of a block copolymer.
A method of making a semi-compliant balloon for a catheter. comprising
- a) extruding a tubular product having a first outer diameter and a first inner diameter, formed at least in part of a block copolymer;
- b) heating the tubular product at a first elevated temperature and radially expanding the tubular product to a second outer diameter
- c) heating the expanded tubular product at a second elevated temperature not less than the first elevated temperature;
- and
- d) cooling the expanded tubular product to form the semi-compliant balloon.
A balloon catheter, comprising:
- a) an elongated shaft having a proximal end, a distal end, and at least one lumen therein;
- and
- b) a noncompliant balloon formed at least in part of a polyurethane block copolymer.
Dependencies are inferred from the claim text.