Coextruded catheter and method of forming
First Claim
Patent Images
1. A multiple lumen catheter comprising:
- an elongated cylindrical body portion having distal and proximal end portions with one or more internal septums therein to form a plurality of lumens therebetween, and said body portion being formed of a plurality of materials having different durometers to form at least first, second and third layers thereon wherein said first layer has a lower durometer than said third layer.
4 Assignments
0 Petitions
Accused Products
Abstract
An elongated catheter formed of coextruded materials such that the inner surface of the extension members or body portion of the catheter have a higher durometer than the outer surface of the extension members or body portion of the catheter to reduce septum deflection during normal use, and the likelihood of tearing or sticking of the extension members is reduced.
328 Citations
40 Claims
-
1. A multiple lumen catheter comprising:
an elongated cylindrical body portion having distal and proximal end portions with one or more internal septums therein to form a plurality of lumens therebetween, and said body portion being formed of a plurality of materials having different durometers to form at least first, second and third layers thereon wherein said first layer has a lower durometer than said third layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
16. A multiple lumen catheter comprising an elongated cylindrical body portion having distal and proximal end portions with an internal septum therein to form a plurality of lumens therebetween;
-
at least one elongated extension member operatively connected to said proximal end portion of said body portion in flow communication with at least one of said lumens; and at least one of said body portion or said extension member being formed of a plurality of materials having different durometers such that inner and outer layers are formed thereon having different durometers, and an intermediate layer is integrally formed therebetween. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A catheter comprising:
-
an elongated and generally cylindrical body portion with distal and proximal end portions and at least one lumen extending therebetween; an inner layer on said body portion having a durometer in the range of approximately 72A to 85A; and an outer layer on said body portion having a durometer in the range of approximately 90A to 75D. - View Dependent Claims (26, 27)
-
-
28. A catheter comprising:
-
an elongated cylindrical body portion having distal and proximal end portions with one or more lumens therebetween; at least one elongated extension member operatively connected to said proximal end portion of said body portion in flow communication with at least one of said lumens; and at least one of said body portion or said extension member being formed of a plurality of materials having different durometers such that inner and outer layers are formed thereon having different durometers, and an intermediate layer is integrally formed therebetween. - View Dependent Claims (29, 30, 31, 32, 33)
-
-
34. An elongated catheter comprising:
-
an elongated cylindrical body portion having distal and proximal end portions; an elongate extension member in flow communication with said proximal end portion of said body portion, said extension member being formed of a plurality of materials having different durometers to form at least first and second layers wherein said first layer has a lower durometer than said second layer; and a connection member operatively connecting said body portion to said extension member. - View Dependent Claims (35, 36, 37)
-
-
38. A method of forming a catheter having an elongated cylindrical body portion having distal and proximal end portions with one or more internal septums therein to form a plurality of lumens therebetween, the method comprising:
coextruding a plurality of materials having different durometers to form the septum and body portion of the catheter simultaneously such that the body portion of the catheter is formed to include at least first, second and third layers wherein the first layer has a lower durometer than the third layer. - View Dependent Claims (39)
-
40. A method of forming extension members for use on a catheter, the method comprising:
coextruding a plurality of materials having different durometers to simultaneously form at least inner and outer layers on the extension members wherein the inner layer is harder than the outer layer.
Specification