Dilatation balloon catheter and method of manufacturing
First Claim
Patent Images
1. An angioplasty catheter, comprising:
- a single element, longitudinally extending flexible shaft which has a proximal section and a distal section, the proximal section having an inflation lumen extending longitudinally therethrough and the distal section having a proximal transition portion and a distal core portion, with the transition portion having a distally decreasing outer diameter and the distal core portion having a solid cross section; and
a balloon circumscribing the shaft which has a proximal segment, an intermediate inflatable segment, and a distal segment, the proximal segment being sealably connected to the shaft, the distal segment being sealably connected to the distal core portion of the distal section of the shaft and the intermediate segment beginning distally of the proximal transition portion of the distal section of the shaft and in fluid communication with the inflation lumen.
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Accused Products
Abstract
An angioplasty catheter has a one-piece, flexible elongated tube in which a hollow proximal section tapers to form a solid distal core with a solid cross-section. The core further tapers to form a safety wire at the distal end of the catheter. An inflatable balloon circumscribes the elongated tube and the interior of the balloon is in fluid communication with a lumen defined by the hollow proximal section of the tube through at least one aperture extending through the tube wall and into the balloon interior. A coil spring extends distally from the balloon about the solid distal core and safety wire, with the safety wire secured to an end cap of the coil spring.
140 Citations
49 Claims
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1. An angioplasty catheter, comprising:
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a single element, longitudinally extending flexible shaft which has a proximal section and a distal section, the proximal section having an inflation lumen extending longitudinally therethrough and the distal section having a proximal transition portion and a distal core portion, with the transition portion having a distally decreasing outer diameter and the distal core portion having a solid cross section; and a balloon circumscribing the shaft which has a proximal segment, an intermediate inflatable segment, and a distal segment, the proximal segment being sealably connected to the shaft, the distal segment being sealably connected to the distal core portion of the distal section of the shaft and the intermediate segment beginning distally of the proximal transition portion of the distal section of the shaft and in fluid communication with the inflation lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An angioplasty catheter, comprising:
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a single element, longitudinally extending flexible shaft which has a proximal section and a distal section, the proximal section having an inflation lumen extending longitudinally therethrough and the distal section having a proximal transition portion and a distal core portion, with the transition portion having a distally decreasing outer diameter and the distal core portion having a solid cross section; and a balloon circumscribing the shaft which has a proximal segment, an intermediate inflatable segment, and a distal segment, the proximal segment being sealably connected to the shaft, the distal segment being sealably connected to the distal core portion of the distal section of the shaft and the intermediate segment beginning distally of the proximal transition portion of the distal section of the shaft and in fluid communication with the inflation lumen. a wire portion formed in the distal core portion of the distal section of the shaft with the wire portion being of reduced diameter from the distal core portion and extending distally thereof; and a flexible coil spring mounted on the distal core portion of the distal section of the shaft to extend about the wire portion, with the coil spring secured to a distal end of the wire portion.
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19. A method of manufacturing an angioplasty balloon catheter which comprises the steps of:
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forming a single element shaft having an inflation lumen and a proximal section and a distal section; forming a proximal part of the distal section of the shaft into a transition portion wherein the cross-sectional diameter of the shaft is reduced distally; forming a distal part of the distal section into a generally solid distal core; mounting an inflatable balloon on the distal section of the shaft, with a proximal segment of the balloon secured to the shaft, with a distal segment of the balloon secured to the generally solid distal core, and with an intermediate inflatable segment of the balloon beginning distally of the proximal transition portion of the distal section of the shaft; and providing a means of fluid communication between the balloon and the inflation lumen. - View Dependent Claims (20, 21, 22, 23, 24, 25, 34, 35)
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26. A method of manufacturing an angioplasty balloon catheter which comprises the steps of:
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forming a single element shaft having an inflation lumen and a proximal section and a distal section; forming a proximal transition portion from the distal section of the shaft wherein the cross-sectional diameter of the shaft is reduced distally; forming a distal core portion of the distal section of the shaft into a metal core wire; mounting an inflatable balloon on the distal section of the shaft, with a proximal segment of the balloon secured to the shaft, a distal segment of the balloon secured to the distal core portion and an intermediate inflatable segment beginning distally of the proximal transition portion of the distal section of the shaft; and providing a means of fluid communication between the intermediate inflatable segment of the balloon and the inflation lumen. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. An angioplasty catheter, comprising:
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a longitudinal extending flexible shaft which has a proximal section and a distal section, the proximal section having an inflation lumen extending longitudinally therethrough and the distal section comprising a single element having a proximal transition portion and a distal core portion, with the transition portion providing a distally decreasing shaft outer diameter and the distal core portion having a solid cross section; and a balloon circumscribing the shaft having a proximal segment, an intermediate inflatable segment, and a distal segment, the proximal segment being sealably connected to the shaft, the distal segment being sealably connected to the distal core portion of the distal section of the shaft and the intermediate segment being in fluid communication with the inflation lumen. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. The angioplasty catheter wherein an elongated shaft supports an inflatable balloon at a distal end thereof, the improvement comprising:
a shaft including a proximal section having an inflation lumen therethrough, the inflation lumen being in fluid communication with an interior of the balloon, and a distal section, the distal section comprising a single element having a proximal transition portion and a distal core portion extending through the interior of the balloon, with the transition portion providing a distally decreasing shaft outer diameter and the distal core portion having a solid cross section terminating the inflation lumen.
Specification