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US 2004/0175525 A1Published application
Catheter incorporating an improved polymer shaft
AssigneeSciMed Life Systems, Inc.
InventorsMartin R. Willard, Pu Zhou
Life of this patent
Estimating the term…
Abstract
A catheter shaft and methods of making and using the same. The catheter shaft may include a proximal portion having about 80 to about 95 weight % polyoxymethylene and about 5 to about 20 weight % polyether polyester, an intermediate portion having about 20 to about 50 weight % polyoxymethylene and about 50 to about 80 weight % polyether polyester, and a distal portion having about 5 to about 20 weight % polyoxymethylene and about 80 to about 95 weight % polyether polyester. The intermediate portion is disposed between the proximal portion and the distal portion.
Claims27
A catheter shaft, comprising:
- a proximal portion having about 80 to about 95 weight % polyoxymethylene and about 5 to about 20 weight % polyether polyester;
- an intermediate portion coupled to the proximal portion, the intermediate portion having about 20 to about 50 weight % polyoxymethylene and about 50 to about 80 weight % polyether polyester;
- and
- a distal portion coupled to the intermediate portion, the distal portion having about 5 to about 20 weight % polyoxymethylene and about 80 to about 95 weight % polyether polyester.
1 more element
A catheter shaft comprising:
- a polymer blend shaft that includes a blend of polyoxymethylene with polyether polyester, the polymer blend shaft including a proximal portion having a flexural modulus of about 210 to about 380 ksi, an intermediate portion having a flexural modulus of about 30 to about 90 ksi, and a distal portion having a flexural modulus of less than about 30 ksi, wherein the intermediate portion is disposed between the proximal portion and the distal portion.
A catheter shaft, comprising:
- an inner layer;
- a support member disposed over the inner layer;
- and
- an outer layer disposed over the inner tubular member, the outer layer including a proximal portion having about 80 to about 95 weight % polyoxymethylene and about 5 to about 20 weight % polyether polyester, an intermediate portion having about 20 to about 50 weight % polyoxymethylene and about 50 to about 80 weight % polyether polyester, and a distal portion having about 5 to about 20 weight % polyoxymethylene and about 80 to about 95 weight % polyether polyester, wherein the intermediate portion is disposed between the proximal portion and the distal portion.
1 more element
A balloon catheter comprising:
- an inner tubular member;
- an outer tubular member disposed over the inner tubular member, the outer tubular member including a proximal portion having about 80 to about 95 weight % polyoxymethylene and about 5 to about 20 weight % polyether polyester, an intermediate portion having about 20 to about 50 weight % polyoxymethylene and about 50 to about 80 weight % polyether polyester, and a distal portion having about 5 to about 20 weight % polyoxymethylene and about 80 to about 95 weight % polyether polyester, wherein the intermediate portion is disposed between the proximal portion and the distal portion;
- and
- a balloon coupled to the distal portion of the outer tubular member.
1 more element
A catheter shaft, comprising:
- a polymer blend proximal section;
- a polymer blend distal section having a material composition different from the proximal section;
- a polymer blend intermediate section disposed between the proximal section and the distal section, the intermediate section having a material composition different from both the proximal section and the distal section;
- and
- wherein the proximal section, the distal section, and the intermediate section each include polyoxymethylene blended with a polymer having an ether group.
2 more elements
A catheter shaft, comprising:
- a proximal section including about 80 to about 95 weight % polyoxymethylene;
- an intermediate section coupled to the proximal section, the intermediate section including about 20 to about 50 weight % polyoxymethylene;
- a distal section coupled to the intermediate section, the distal section having about 5 to about 20 weight % polyoxymethylene;
- and
- wherein the proximal section, intermediate section, and distal section each include polyether polyester.
2 more elements
A method for manufacturing a catheter shaft, comprising the steps of:
- providing a first polymer blend having about 80 to about 95 weight % polyoxymethylene and about 5 to about 20 weight % polyether polyester;
- providing a second polymer blend having about 20 to about 50 weight % polyoxymethylene and about 50 to about 80 weight % polyether polyester;
- and
- providing a third polymer blend having about 5 to about 20 weight % polyoxymethylene and about 80 to about 95 weight % polyether polyester;
- extruding the first polymer blend to define a first shaft member;
- extruding the second polymer blend to define a second shaft member;
- extruding the third polymer blend to define a third shaft member;
- and
- coupling the first shaft member, second shaft member, and third shaft member to define a catheter shaft.
6 more elements
A method for manufacturing a catheter shaft, comprising the steps of:
- providing a first quantity of polyoxymethylene;
- providing a second quantity of polyether polyester;
- co-extruding the first quantity of polyoxymethylene with the second quantity of polyether polyester to define a proximal shaft portion having about 80 to about 95 weight % polyoxymethylene and about 5 to about 20 weight % polyether polyester, an intermediate shaft portion having about 20 to about 50 weight % polyoxymethylene and about 50 to about 80 weight % polyether polyester, and a distal shaft portion having about 5 to about 20 weight % polyoxymethylene and about 80 to about 95 weight % polyether polyester.
Dependencies are inferred from the claim text.