US 6,200,325 B1Granted

Balloon catheter and stent deploying catheter system

AssigneeAdvanced Cardiovascular Systems, Inc.

InventorsJonathan P. Durcan, Michael A. Miniati, Jeffrey D. Royal, James M. Jacobs

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Abstract

A balloon catheter with a balloon having first and second tapered sections adjacent the distal and proximal ends of the working length of the balloon, respectively, and third and fourth tapered sections adjacent the first and second tapered section, respectively. The first and second tapered sections taper at a first angle to a smaller outer diameter than the inflated outer diameter of the working length inflated within a deployment range of the balloon, and the third and fourth tapered sections taper at a second angle larger than the first angle. The balloon has expandable retention sections proximal and the distal to the working length of the balloon for inhibiting migration of a stent mounted on the balloon.

Claims49

Dependent claims

A balloon catheter, comprising:

a) an elongated shaft having a proximal end, a distal end, and an inflation lumen extending within at least a section thereof;
and
b) a balloon mounted on a distal shaft section having an interior in fluid communication with the inflation lumen, and
a first section with an inflated outer diameter within a deployment range of the balloon, a proximal end, and a distal end, and having a length;
a first tapered section adjacent the distal end of the first section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first section, and tapering at a first angle, and having a length which is not greater than about 30% of the length of the first section of the balloon;
a second tapered section adjacent the proximal end of the first section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first section, and tapering at a second angle, and having a length which is not greater than about 30% of the length of the first section of the balloon;
a third tapered section adjacent the first tapered section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first tapered section, and tapering at a third angle greater than the first angle;
and
a fourth tapered section adjacent the second tapered section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the second tapered section, and tapering at a fourth angle greater than the second angle.

6 more elements

A catheter system for implanting a stent in a patient's body lumen, comprising:

a) a balloon catheter having an elongated shaft with a proximal end, a distal end, and an inflation lumen extending within at least a section thereof;
b) a balloon on a distal shaft section, having an interior chamber in fluid communication with the inflation lumen, and having
a first section having a distal end, a proximal end, a first outer diameter at a first pressure, a second outer diameter greater than the first outer diameter at a second pressure greater than the first pressure, the second pressure being within a deployment range of the balloon;
a first inflatable retention section distal to the distal end of the first section, and a second inflatable retention section proximal to the proximal end of the first section, the first and second retention sections each having a first outer diameter at the first pressure, and a second outer diameter at the second pressure which is less than the second outer diameter of the first section;
and
c) an expandable stent disposed about and mounted onto at least a portion of the first section of the balloon so that at least a portion of the first and second retention sections expand to the first outer diameter thereof at the first pressure which is greater than the first outer diameter of the portion of the first section of the balloon having the stent thereon, and so that inflation of the balloon at the second pressure expands the stent mounted thereon.

3 more elements

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 the shaft to a location spaced proximally from a distal end of the catheter;
b) a balloon mounted on a distal shaft section having an interior in fluid communication with the inflation lumen, and
a first section with an inflated outer diameter within a deployment range of the balloon, a proximal end, and a distal end;
a first tapered section adjacent the distal end of the first section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first section, and tapering at a first angle;
a second tapered section adjacent the proximal end of the first section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first section, and tapering at a second angle;
a third tapered section adjacent the first tapered section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first tapered section, and tapering at a third angle greater than the first angle;
and
a fourth tapered section adjacent the second tapered section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the second tapered section, and tapering at a fourth angle greater than the second angle;
and
c) an expandable stent disposed about and mounted onto at least a portion of the balloon so that radial expansion of the balloon to the inflated diameter expands the stent mounted thereon.

7 more elements

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) a balloon mounted on the distal section of the catheter shaft with an interior chamber in fluid communication with the inflation lumen, having
a first section with an inflated outer diameter within a deployment range of the balloon, a proximal end, and a distal end;
a first tapered section adjacent the distal end of the first section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first section, and tapering at a first angle;
a second tapered section adjacent the proximal end of the first section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first section, and tapering at a second angle;
a third tapered section adjacent the first tapered section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the first tapered section, and tapering at a third angle greater than the first angle;
and
a fourth tapered section adjacent the second tapered section with an inflated outer diameter within the deployment range of the balloon smaller than the diameter of the second tapered section, and tapering at a fourth angle greater than the second angle;
and
iii) an expandable stent disposed about and mounted onto at least the first section of the balloon so that inflation of the first section of the balloon within the deployment range expands the stent mounted thereon and implants the stent in the body;
b) inserting the catheter system into the patient's body;
and
c) inflating the balloon to produce radial expansion of the balloon and the stent mounted thereon, and implant the stent in the patient.

11 more elements

A balloon catheter, comprising:

a) an elongated shaft with a proximal end, a distal end, and an inflation lumen extending within at least a section thereof;
and
b) a balloon on a distal shaft section, having an interior chamber in fluid communication with the inflation lumen, and having
a first section having a distal end, a proximal end, a first outer diameter at a first pressure, a second outer diameter greater than the first outer diameter at a second pressure greater than the first pressure, the second pressure being within a deployment range of the balloon;
a first tapered section adjacent the distal end of the first section tapering at a first angle;
a second tapered section adjacent the proximal end of the first section tapering at a second angle;
a first inflatable intermediate section distal to the distal end of the first section, and a second inflatable intermediate section proximal to the proximal end of the first section, the first and second intermediate sections each having a first outer diameter at the first pressure, and a second outer diameter at the second pressure which is less than the second outer diameter of the first section;
a third tapered section between the first tapered section and the first intermediate section tapering at a third angle greater than the first angle;
a fourth tapered section between the second tapered section and the second intermediate section tapering at a fourth angle greater than the second angle;
and
a distal balloon shaft section distal to the first intermediate section and secured to the catheter shaft, and a proximal balloon shaft section proximal to the second intermediate section and secured to the catheter shaft.

8 more elements

Dependencies are inferred from the claim text.