A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/126, 128/127
A61M 29/02 (2006.01) A61B 17/22 (2006.01) A61M 25/00 (2006.01)
Patent
CA 1315629
2B410/739 AZB/dml 08/11-87 8547B ABSTRACT OF THE DISCLOSURE A balloon dilatation catheter having a balloon at its distal end includes a distal segment having a collapsible outer diameter. The distal segment includes an inner shaft and a generally coaxial outer surrounding sleeve formed from a very flexible, thin wall, high-strength polymeric material. The balloon is formed integrally with the sleeve and is collapsible about the shaft together with the sleeve. The distal segment of the catheter exhibits a high degree of trackability over a guidewire through tortuous blood vessels. When in its collapsed configuration, the distal segment of the catheter defines a reduced profile which is less obstructive to blood flow through the blood vessel containing the catheter distal segment, such as a coronary artery. In a modified embodiment of the invention, the flexible thin wall sleeve extends; over a greater length of the catheter and may extend to the full length of the catheter. In the modified embodiment, when the sleeve is collapsed about the inner shaft a reduced profile is defined along the length of the catheter. When contained within a guide catheter, the dilatation catheter provides for an enlarged cross-sectional flow area within the guide catheter, thus enhancing proximal dye injections and pressure measurements or, alternately, enabling the use of a smaller diameter guide catheter.
574620
C.r. Bard Inc.
Swabey Ogilvy Renault
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