Catheter having a high tensile strength braid wire constraint
First Claim
1. A tubular assembly for use in catheter construction comprising:
- a. a tubular member having a proximal end, a distal region, and an outer surface;
b. a braid member overlying said tubular member conforming to said outer surface, said braid member including a plurality of terminal ends in the distal region of said tubular member, said braid member formed of high tensile strength metallic wire; and
c. means for restraining said plurality of terminal ends of said braid member to maintain conformance to said outer surface, wherein said restraining means has a proximal end disposed distal of a proximal end of said braid member.
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Accused Products
Abstract
A tubing assembly for manufacture for a catheter of the type having an inner tubular member defining a lumen, an outer tubular member surrounding said inner member, and a support member mounted between the tubular members to provide rigidity to the flexible catheter. The support member comprises a high tensile strength wire braid, and in the preferred embodiment comprises a stainless steel wire braid which has been tempered or hardened. This higher tensile strength affords significantly greater kink resistance to the flexible catheter. One wire braid has a tensile strength in the range of 300 to 425 kpsi and a braid density of approximately 40 pic. The high tensile strength wire braid has the disadvantage of tending to flare out at its free ends. Therefore, means are provided for preventing the flaring of the wire braid during manufacture of the tubing assembly. One means includes adhesive applied over the free ends. Another means includes a restraining sleeve applied over the free ends.
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Citations
18 Claims
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1. A tubular assembly for use in catheter construction comprising:
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a. a tubular member having a proximal end, a distal region, and an outer surface; b. a braid member overlying said tubular member conforming to said outer surface, said braid member including a plurality of terminal ends in the distal region of said tubular member, said braid member formed of high tensile strength metallic wire; and c. means for restraining said plurality of terminal ends of said braid member to maintain conformance to said outer surface, wherein said restraining means has a proximal end disposed distal of a proximal end of said braid member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tubular assembly for use in catheter construction comprising:
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a. a tubular member having a proximal end, a distal end and an outer surface; b. a braid member overlying said tubular member conforming to said outer surface, said braid member including a plurality of terminal ends proximate the distal end of said tubular member, said braid member comprising high tensile strength metal; and c. a sufficient quantity of adhesive means restraining said plurality of terminal ends of said braid member to maintain conformance to said outer surface, wherein said adhesive restraining means has a proximal end disposed distal of a proximal end of said braid member. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification