Importance

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Abstract

A perfusion dilatation catheter has a relatively long proximal shaft section comprised of an inner tube coaxially positioned within an outer tube to form two coaxial lumens, and a relatively short distal shaft section comprised of a single tube with two side-by-side lumens. A connection between the proximal and distal shaft sections is formed by inserting and bonding a proximal end of the distal shaft section within a distal end of the outer tube of the proximal shaft section, and by inserting and bonding a distal end of the inner tube of the proximal shaft section within a relatively large lumen of the distal shaft section. An inner lumen of the proximal shaft section, which carries a guide wire, communicates with the relatively large lumen of the distal shaft section. An annular lumen, between the inner and outer tube of the proximal shaft section, communicates with a relatively small lumen of the distal shaft and carries inflation fluid for a balloon which is connected to a distal end of the distal shaft section. The distal shaft includes at least one opening proximal of the balloon, which allows blood to enter the relatively large lumen and flow past the inflated balloon.

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First Claim