A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/126
A61M 29/00 (2006.01) A61B 17/22 (2006.01) A61M 25/10 (2006.01) A61B 17/92 (2006.01)
Patent
CA 1183054
ABSTRACT OF THE INVENTION A novel balloon catheter apparatus for treatment of atherosclerotic occlusions within the cardiovascular system, comprising a catheter defining a through-going lumen, a fluid supply syringe attached to one end of the catheter for supplying fluid through the lumen, and a balloon attached to the other end of the catheter which is inflatable by forcing fluid through the lumen. A pulse generator is also attached to the catheter for generating pressure pulses in the fluid through the lumen, which pulses cause the balloon to sharply expand and contract at intervals. The pulse generator includes a pulse syringe communicating with the lumen, a spring-driven ram to contact the piston of the pulse syringe, and a cam rotor to move the ram away from the piston, thereby compressing the spring until the cam rotates further and the ram is released to strike the piston. When the balloon catheter is inserted in the cardiovascular system of the patient and guided to the occlusive site, the balloon is first inflated by the supply syringe until the balloon contacts the occlusive material, and then one or more pulses may be applied by the pulse generator through the fluid to rapidly expand and contract the balloon. Since the occlusive material is much more brittle than the surrounding wall, the wall expands in response to the pressure pulses while the occlusive material cracks and separates from the wall to be removed through normal cardiovascular processes.
418791
Leveen Eric G.
Leveen Robert F.
Leveen Eric G.
Leveen Robert F.
Stewart & Kolash Ltd
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