Cryotherapeutic devices having integral multi-helical balloons and methods of making the same
First Claim
1. A method of forming a balloon from an extruded integral shaft having a plurality of lumens along the shaft, the plurality of lumens including at least a first lumen and a second lumen, the method comprising:
- positioning a distal portion of the shaft in a mold configured to define an outer surface of the balloon;
clamping a first end region of the distal portion with the mold;
rotating the mold relative to the shaft thereby forming a twisted distal portion of the shaft; and
forming the balloon along the twisted distal portion, wherein the balloon is configured to deliver therapeutically effective cryogenic cooling to a treatment site.
1 Assignment
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Accused Products
Abstract
A cryotherapeutic device having an integral multi-helical balloon section and methods of making the same. A method of forming the cryotherapeutic device can include forming an extruded integral shaft having first and second substantially parallel lumens. The method can further include twisting a distal section of the shaft such that the first and second lumens form intertwined helical portions. The first and second helical portions can be plastically enlarged to form an inflatable body configured to deliver therapeutically effective cryogenic cooling to a treatment site.
548 Citations
15 Claims
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1. A method of forming a balloon from an extruded integral shaft having a plurality of lumens along the shaft, the plurality of lumens including at least a first lumen and a second lumen, the method comprising:
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positioning a distal portion of the shaft in a mold configured to define an outer surface of the balloon; clamping a first end region of the distal portion with the mold; rotating the mold relative to the shaft thereby forming a twisted distal portion of the shaft; and forming the balloon along the twisted distal portion, wherein the balloon is configured to deliver therapeutically effective cryogenic cooling to a treatment site. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of forming an inflatable body from an extruded integral shaft having at least first and second lumens extending along the shaft substantially parallel to each other for at least a portion of the shaft, the method comprising:
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positioning a distal portion of the shaft in a mold configured to define an outer surface of the inflatable body; clamping a first end region of the distal portion with the mold; rotating the mold relative to the shaft thereby twisting a distal portion of the shaft such that the first lumen has a first helical portion and the second lumen has a second helical portion intertwined with the first helical portion; and plastically enlarging the intertwined first and second helical portions to form the inflatable body, wherein the inflatable body is configured to deliver therapeutically effective cryogenic cooling to a treatment site. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification