Medical devices
View Patent ↗Medical devices and methods of making medical devices are described. In some embodiments, a medical device includes a member having a first portion with a first wall thickness, and a second portion with a second wall thickness, wherein the first portion is circumferentially rotated.
1. A balloon catheter, comprising:
a balloon;
a first tubular member disposed along a proximal portion of the balloon catheter, the first tubular member having an outer surface;
a second tubular member disposed along a distal portion of the balloon catheter, the second tubular member having an inner surface;
wherein the inner surface of the second tubular member overlaps with and is attached to the outer surface of the first tubular member; and
a tubular inner member comprising a tubular proximal portion and a tubular distal portion,
wherein the second tubular member and the inner member cooperate to define an inflation lumen fluidly connected to the balloon,
wherein the tubular inner member has a proximal end coupled to the second tubular member, a distal end, and defines a guidewire lumen between the proximal end and the distal end,
wherein the distal portion of the inner member is at least partially disposed in the balloon,
wherein the proximal portion of the inner member has an inner diameter and wherein the distal portion of the inner member has an inner diameter that is less than the inner diameter of the proximal portion of the inner member, and
wherein the distal portion of the inner member has been circumferentially rotated with respect to the proximal portion of the inner member to impart a degree of angular alignment to a material of the inner member.
2. The balloon catheter of claim 1 , wherein the inner member comprises a tapered region between the proximal portion and the distal portion.
3. The balloon catheter of claim 2 , wherein the tapered portion comprises a material with a degree of angular alignment.
4. The balloon catheter of claim 1 , wherein the proximal portion of the inner member has a first wall thickness and the distal portion of the inner member has a second wall thickness that is less than the first wall thickness.
5. The balloon catheter of claim 1 , wherein the distal portion of the inner member has a proximal end and a distal end and a length extending therebetween, and wherein the inner diameter of the distal portion of the inner member is constant along a majority of the length.
6. The balloon catheter of claim 1 , wherein the inner member comprises a plurality of coextruded layers.
7. The balloon catheter of claim 1 , wherein the proximal portion of the inner member is substantially free of circumferential rotation.
8. The balloon catheter of claim 1 , wherein the proximal portion of the inner member has an outer diameter and wherein the distal portion of the inner member has an outer diameter that is less than the outer diameter of the proximal portion of the inner member.
9. A balloon catheter, comprising:
a balloon;
a first tubular member disposed along a proximal portion of the balloon catheter, the first tubular member having an outer surface;
a second tubular member disposed along a distal portion of the balloon catheter, the second tubular member having an inner surface;
wherein the outer surface of the first tubular member and the inner surface of the second tubular member are secured to with an overlapping bond; and
a tubular inner member comprising a tubular proximal portion and a tubular distal portion,
wherein the inner surface of the second tubular member and an outer surface of the inner member cooperate to define an inflation lumen fluidly connected to the balloon,
wherein an inner surface of the tubular inner member defines a guidewire lumen,
wherein the tubular inner member has a proximal end coupled to the second tubular member,
wherein the distal portion of the inner member is at least partially disposed in the balloon,
wherein the inner member tapers between the proximal portion of the inner member and the distal portion of the inner member.
10. The balloon catheter of claim 9 , wherein a first portion of the inner member has been circumferentially rotated to impart a degree of angular alignment to a material of the inner member.
11. The balloon catheter of claim 10 , wherein a second portion of the inner member is substantially free of circumferential rotation.
12. The balloon catheter of claim 11 wherein the second portion of the inner member is proximal the first portion of the inner member.
13. The balloon catheter of claim 9 , wherein the proximal portion of the inner member has a first wall thickness and the distal portion of the inner member has a second wall thickness that is less than the first wall thickness.
14. The balloon catheter of claim 1 , wherein the second tubular member is flared.
15. The balloon catheter of claim 1 , wherein the second tubular member is circumferentially rotated.
16. The balloon catheter of claim 9 , wherein the second tubular member is flared.
17. The balloon catheter of claim 9 , wherein the second tubular member is circumferentially rotated.