Catheter with a pre-shaped distal tip
First Claim
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1. A catheter comprising:
- an elongated tubular shaft having a proximal shaft section, an intermediate shaft section, a distal shaft section, a length, and an interior lumen extending through the length adapted to slidably receive a guidewire;
wherein the elongated tubular shaft includes an inner layer extending from a proximal end of the elongated tubular shaft to a distal end of the elongated tubular shaft;
wherein the proximal shaft section includes a first outer layer segment comprising a relatively high durometer polymeric material, and the distal shaft section includes a second outer layer segment comprising a relatively low durometer polymeric material;
wherein the intermediate shaft section includes a third outer layer segment comprising a polymeric material having a durometer intermediate to the first outer layer segment and the second outer layer segment, and a fourth outer layer segment comprising a polymeric material having a durometer intermediate to the first outer layer segment and the second outer layer segment that is different from the third outer layer segment;
wherein the elongate tubular shaft further includes a first intermediate layer segment disposed between the inner layer and the first, second, third, and fourth outer layer segments and terminating distally at a first location within the distal shaft section proximal to the distal end, and a second intermediate layer segment disposed between the inner layer and the first, second, third, and fourth outer layer segments and extending distally from the first location to a second location proximal to the distal end; and
a distal tip section having a pre-shaped tip configuration.
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Abstract
Catheters having a pre-shaped tip configuration are disclosed. A catheter in accordance with an illustrative embodiment of the present invention can include an elongated tubular shaft equipped with a distal tip section having a pre-shaped tip configuration that can be used to facilitate tracking of the device through particular locations of the vasculature. The catheter may include a number of features that transition the stiffness and flexibility characteristics of the device and provide a means to radiographically visualize the catheter within the body.
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Citations
20 Claims
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1. A catheter comprising:
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an elongated tubular shaft having a proximal shaft section, an intermediate shaft section, a distal shaft section, a length, and an interior lumen extending through the length adapted to slidably receive a guidewire; wherein the elongated tubular shaft includes an inner layer extending from a proximal end of the elongated tubular shaft to a distal end of the elongated tubular shaft; wherein the proximal shaft section includes a first outer layer segment comprising a relatively high durometer polymeric material, and the distal shaft section includes a second outer layer segment comprising a relatively low durometer polymeric material; wherein the intermediate shaft section includes a third outer layer segment comprising a polymeric material having a durometer intermediate to the first outer layer segment and the second outer layer segment, and a fourth outer layer segment comprising a polymeric material having a durometer intermediate to the first outer layer segment and the second outer layer segment that is different from the third outer layer segment; wherein the elongate tubular shaft further includes a first intermediate layer segment disposed between the inner layer and the first, second, third, and fourth outer layer segments and terminating distally at a first location within the distal shaft section proximal to the distal end, and a second intermediate layer segment disposed between the inner layer and the first, second, third, and fourth outer layer segments and extending distally from the first location to a second location proximal to the distal end; and a distal tip section having a pre-shaped tip configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification