Catheter with medicament injection pores
First Claim
1. A catheter including a tube having a tube wall, said tube comprising a first polymer and having a plurality of pores extending through said tube wall, said pores having associated therewith a second polymer which is different from the first polymer and which undergoes a structural change upon contact with a fluid introduced into the tube that has a physical or a chemical property that induces said structural change of said second polymer to thereby enable a selective transmission of the fluid through said tube wall.
1 Assignment
0 Petitions
Accused Products
Abstract
A catheter or balloon catheter includes a tube or balloon which is provided with a plurality of pores. A stimulus-responsive polymer is attached to the pores so that fluid transmission through the pores is controllable by a stimulus such as a change of pH, composition, and temperature. The catheter can administer a necessary limited amount of medicament to a locally limited site of a blood vessel only when necessary.
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Citations
6 Claims
- 1. A catheter including a tube having a tube wall, said tube comprising a first polymer and having a plurality of pores extending through said tube wall, said pores having associated therewith a second polymer which is different from the first polymer and which undergoes a structural change upon contact with a fluid introduced into the tube that has a physical or a chemical property that induces said structural change of said second polymer to thereby enable a selective transmission of the fluid through said tube wall.
- 4. A balloon catheter including a balloon, said balloon comprising a first polymer and having a plurality of pores extending through said balloon, said pores having associated therewith a second polymer which is different from the first polymer and which undergoes a structural change upon contact with a fluid introduced into the balloon that has a physical or a chemical property that induces said structural change of said second polymer to thereby enable a selective transmission of the fluid through said balloon.
Specification