Expansion device and method for treating vascular passageways
First Claim
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1. A method for delivering an expandable member through the vasculature of a patient comprising:
- delivering in an unexpanded state an expandable member at a distal end of an elongate shaft to a treatment site, the expandable member having a distal end and a proximal end, the expandable member comprising an inner expandable member and a plurality of outer expandable members at least partially surrounding the inner expandable member, wherein the plurality of outer expandable members are not fixed relative to an outer surface of the inner expandable member at an area between proximal and distal ends of the inner expandable member, and each outer expandable member comprises a main section and at least one substantially narrowed section, the at least one substantially narrowed section distal and/or proximal of the main section, the main section of each outer expandable member extending along in contact with the outer surface of the inner expandable member when the expandable member is in the unexpanded state;
positioning a prosthetic device in a crimped state on the expandable member;
expanding the inner expandable member in a passageway of the body of the patient;
expanding the plurality of outer expandable members in the passageway, wherein expansion of the inner and outer expandable members expands the prosthetic device at the treatment site; and
permitting blood to pass through a plurality of gaps formed between an inner surface of the passageway and outer surfaces of the inner and outer expandable members.
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Abstract
Method for delivering an expandable member to a treatment location includes an elongate shaft and an expandable member coupled to a distal end of the elongate shaft. Embodiments of the expandable member are moveable between a collapsed configuration and an expanded configuration, and have an inner expandable member and a plurality of outer expandable members that at least partially surround the inner expandable member, and are suitable for delivering prosthetic heart valves and performing vavuloplasties.
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Citations
16 Claims
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1. A method for delivering an expandable member through the vasculature of a patient comprising:
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delivering in an unexpanded state an expandable member at a distal end of an elongate shaft to a treatment site, the expandable member having a distal end and a proximal end, the expandable member comprising an inner expandable member and a plurality of outer expandable members at least partially surrounding the inner expandable member, wherein the plurality of outer expandable members are not fixed relative to an outer surface of the inner expandable member at an area between proximal and distal ends of the inner expandable member, and each outer expandable member comprises a main section and at least one substantially narrowed section, the at least one substantially narrowed section distal and/or proximal of the main section, the main section of each outer expandable member extending along in contact with the outer surface of the inner expandable member when the expandable member is in the unexpanded state; positioning a prosthetic device in a crimped state on the expandable member; expanding the inner expandable member in a passageway of the body of the patient; expanding the plurality of outer expandable members in the passageway, wherein expansion of the inner and outer expandable members expands the prosthetic device at the treatment site; and permitting blood to pass through a plurality of gaps formed between an inner surface of the passageway and outer surfaces of the inner and outer expandable members. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for deploying a prosthetic heart valve without rapid pacing in a patient in need thereof, the method comprising:
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positioning a prosthetic heart valve in a crimped state on an expansion device of a delivery system, the expansion device disposed at a distal end portion of a balloon catheter, the expansion device comprising; an inner expandable member and a plurality of outer expandable members at least partially surrounding the inner expandable member, the plurality of outer expandable members not fixed relative to an outer surface of the inner expandable member between proximal and distal ends of the inner expandable member, each outer expandable member comprising a main section and at least one substantially narrowed section, the at least one substantially narrowed section distal or proximal of the main section, wherein positioning the prosthetic heart valve in the crimped state on the expansion device comprises crimping the prosthetic heart valve at a location of the delivery system other than the expansion device and repositioning the prosthetic heart valve onto the expansion device; advancing the prosthetic heart valve through the vasculature to a native heart valve; expanding the inner expandable member; expanding the outer expandable members, thereby forming a plurality of gaps in the expansion device; and permitting blood flow through a plurality of gaps, thereby deploying the prosthetic heart valve in the native heart valve without rapid pacing. - View Dependent Claims (11, 12, 13, 14)
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15. A method for performing a valvuloplasty without rapid pacing in a patient in need thereof, the method comprising:
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positioning an expansion device disposed at a distal end portion of a balloon catheter, the expansion device comprising; an inner expandable member and a plurality of outer expandable members at least partially surrounding the inner expandable member, the plurality of outer expandable members not fixed relative to an outer surface of the inner expandable member between proximal and distal ends of the inner expandable member, each outer expandable member comprising a main section and at least one substantially narrowed section, the at least one substantially narrowed section distal or proximal of the main section; advancing the expansion device through the vasculature to a native heart valve; expanding the inner expandable member; expanding the outer expandable members, thereby forming a plurality of gaps in the expansion device, wherein expanding the outer expandable members comprises expanding one or more of the outer expandable members before expanding the other of the outer expandable members; and permitting blood flow through a plurality of gaps, thereby performing a valvuloplasty of the native heart valve without rapid pacing. - View Dependent Claims (16)
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Specification