Balloon-type catheter
AssigneeBaxter Travenol Laboratories, Inc.
InventorsLawrence F. Becker, John J. Donohue, Dean G. Laurin, Henry M. Gajewski
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Abstract
A balloon-type catheter is disclosed having a catheter shank made of a block copolymer having thermoplastic rubber characteristics with a central block of ethylene-butylene copolymer and terminal blocks of polystyrene. The inflatable balloon member, and preferably the distal Y-member, of the catheter are made of an elastic composition which includes the same or a similar block copolymer, in the presence of polystyrene or equivalent material as a tackifying agent, polypropylene, and an oil-type plasticizer.
Claims7
A balloon-type catheter which comprises a tubular shaft and an inflatable balloon member, carried by said catheter, said shaft and balloon member being made of an elastic composition which comprises:
- at least 40 percent by weight of a block copolymer having thermoplastic rubber characteristics with a central block of ethylene-butylene copolymer and terminal blocks of polystyrene:
- from 0 to 45 percent by weight of polypropylene, at least one of said shaft and balloon member containing from 5 to 30 percent by weight of a tackifying agent comprising a low molecular weight polystyrene;
- said formulation being united with sufficient hydrophobic oil-type plasticizer to provide the desired degree of softness to said elastic composition.
A balloon-type catheter which comprises a tubular shaft and an inflatable balloon member, carried by said catheter, said shaft and balloon member being made of an elastic composition which comprises:
- a block copolymer having thermoplastic rubber characteristics with a central rubbery polyolefin block and terminal blocks of polystyrene, said block copolymer exhibiting a Brookfield viscosity at 25 degrees C. of 10 to 2000 cps. when measured using a 10 percent by weight solids solution in toluene, said composition optionally including from 0 to 45 percent by weight of polypropylene, said formulation being mixed with sufficient hydrophobic oil-type plasticizer to provide the desired degree of softness to said elastic composition, said balloon member being sealed in position on said shaft.
Dependencies are inferred from the claim text.