Catheter with spiral cut transition member
First Claim
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1. A medical catheter comprising:
- an outer tubular member having a proximal end, a distal end and a lumen extending therethrough, the outer tubular member including;
(a) a distal section having a first durometer hardness;
(b) a proximal section adjacent the distal section, the proximal section having a second durometer hardness greater than the first durometer hardness; and
(c) a junction between the distal section and the proximal section;
an inner tubular member having a proximal end and a distal end, the inner tubular member disposed within the lumen of the outer tubular member, an annular lumen defined between the inner tubular member and the outer tubular member; and
a tubular transition member having a proximal end, a distal end and an annular wall extending between the proximal end and the distal end, the transition member positioned within the annular lumen defined between the inner tubular member and the outer tubular member, wherein the transition member bridges the junction of the outer tubular member such that the proximal end of the transition member is located proximal of the junction of the outer tubular member and the distal end of the transition member is located distal of the junction of the outer tubular member;
the transition member including at least one cut extending through the annular wall of the transition member providing the transition member with a degree of flexibility.
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Abstract
A tubular transition member having an annular wall with at least one cut extending through the annular wall is disclosed for controlling a transition in stiffness of a catheter from a stiffer more pushable proximal section to a more flexible and trackable distal section and increasing kink resistance. The transition member may extend across the junction formed between the stiffer proximal section and the more flexible distal section. The transition member may be used in conjunction with any type of catheter including single-operator-exchange type catheters, over-the wire type catheters, and/or fixed-wire type catheters.
106 Citations
21 Claims
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1. A medical catheter comprising:
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an outer tubular member having a proximal end, a distal end and a lumen extending therethrough, the outer tubular member including;
(a) a distal section having a first durometer hardness;
(b) a proximal section adjacent the distal section, the proximal section having a second durometer hardness greater than the first durometer hardness; and
(c) a junction between the distal section and the proximal section;
an inner tubular member having a proximal end and a distal end, the inner tubular member disposed within the lumen of the outer tubular member, an annular lumen defined between the inner tubular member and the outer tubular member; and
a tubular transition member having a proximal end, a distal end and an annular wall extending between the proximal end and the distal end, the transition member positioned within the annular lumen defined between the inner tubular member and the outer tubular member, wherein the transition member bridges the junction of the outer tubular member such that the proximal end of the transition member is located proximal of the junction of the outer tubular member and the distal end of the transition member is located distal of the junction of the outer tubular member;
the transition member including at least one cut extending through the annular wall of the transition member providing the transition member with a degree of flexibility. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A medical catheter comprising:
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an outer tubular member having a lumen extending therethrough, the outer tubular member including;
(a) a distal section having a proximal end and a distal end, the distal section formed of a first material;
(b) a proximal section adjoining the distal section, the proximal section having a proximal end and a distal end, the proximal section formed of a second material dissimilar to the first material; and
(c) a joint wherein the proximal end of the distal section adjoins the distal end of the proximal section;
an inner tubular member having a proximal end and a distal end, the inner tubular member disposed within the lumen of the outer tubular member, an annular lumen defined between the inner tubular member and the outer tubular member; and
a tubular transition member having a proximal end, a distal end, an annular wall extending between the proximal end and the distal end, and at least one cut extending through the annular wall of the transition member providing the transition member with a degree of flexibility, the transition member positioned within the annular lumen defined between the inner tubular member and the outer tubular member;
wherein the transition member extends across the joint of the outer tubular member such that the proximal end of the transition member is located proximal of the joint and the distal end of the transition member is located distal of the joint; and
wherein a proximal portion of the transition member is secured to the inner tubular member at a location proximal of the joint and a distal portion of the transition member extending distal of the joint is unsecured to the inner tubular member. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification