초록 ▼

An intra-aortic balloon pump catheter includes an inner lumen formed by a thin walled superelastic metal alloy tube, namely of nitinol, with an inside diameter sufficient for a guidewire and a small outside diameter which allows reduction of the outer lumen and related components by at least one siz

An intra-aortic balloon pump catheter includes an inner lumen formed by a thin walled superelastic metal alloy tube, namely of nitinol, with an inside diameter sufficient for a guidewire and a small outside diameter which allows reduction of the outer lumen and related components by at least one size French while providing gas shuttle capacity between the lumens for conventional intra-aortic balloon pump operation. The outer lumen is a tube formed of co-extruded plastics to enhance the size reduction and capacity goals, with an inner nylon portion for strength and a relatively thin polyurethane outer portion for biocompatability, flexibility and compatibility for bonding to a thin polyurethane balloon. The proximal end sleeve of the balloon is stretched and then stress-relieved by heating with an internal heater on a mounting mandrel to effect a desired small diameter sizing. A radiopaque metal marker ring of nitinol also is provided to improve imaging capabilities while being compatible with the lumen materials.

대표청구항 ▼

[ What is claimed is:] [1.] An intra-aortic balloon pump catheter device including a vascular catheter and a large flexible pump balloon mounted on said catheter for insertion by said catheter into and through the vascular system of a patient and into the patient's aorta for repetitious pulse-rate i

[ What is claimed is:] [1.] An intra-aortic balloon pump catheter device including a vascular catheter and a large flexible pump balloon mounted on said catheter for insertion by said catheter into and through the vascular system of a patient and into the patient's aorta for repetitious pulse-rate inflation of said balloon over an extended time-span to assist the blood-pumping function of that patient's heart; said catheter including an inner lumen formed by a highly elastic thin-walled metal tube defined by a continuous metal wall; and an outer lumen, formed of an annular nylon layer and an outer layer of polyurethane over said nylon layer, the nylon layer being of substantially greater radial thickness than said polyurethane layer, said outer lumen surrounding said inner lumen and communicating with said balloon for shuttling gas to and from said balloon in the annular space between said inner and outer lumens to inflate and deflate said balloon at said pulse-rate.