CATHETER HAVING MONOLITHIC MULTILAYER DISTAL OUTER MEMBER

摘要

Balloon catheter includes an outer shaft including a hypotube and a monolithic multilayer distal outer member and having an inflation lumen defined therethrough, a balloon in fluid communication with the inflation lumen, and an inner tubular member having a guidewire lumen defined therethrough. The monolithic multilayer distal outer member has a proximal end portion and a distal end portion. The monolithic multilayer distal outer member has an inner layer comprising a first polymer having a tensile strength greater than about 8,000 psi and an outer layer comprising a second polymer having a flexural modulus of less than about 130,000 psi at room temperature. A proximal end of the monolithic multilayer distal outer member is coupled to the hypotube. The monolithic multilayer distal outer member is necked to a reduced diameter along at least a portion of a length thereof. The balloon has a proximal balloon shaft coupled to a distal end of the monolithic multilayer distal outer member. The inner tubular member extends distally from a proximal port in the proximal end portion of the monolithic multilayer distal outer member through at least a portion of the balloon.

主权项

1. A balloon catheter, comprising:
an outer shaft including a hypotube and a monolithic multilayer distal outer member, the outer shaft having an inflation lumen defined therethrough, the monolithic multilayer distal outer member having a proximal end portion and a distal end portion, the monolithic multilayer distal outer member having an inner layer comprising a first polymer having a tensile strength greater than about 8,000 psi and an outer layer comprising a second polymer having a flexural modulus of less than about 130,000 psi at room temperature, wherein a proximal end of the monolithic multilayer distal outer member is coupled to the hypotube, wherein the monolithic multilayer distal outer member is necked to a reduced diameter along at least a portion of a length thereof; a balloon in fluid communication with the inflation lumen, the balloon having a proximal balloon shaft coupled to a distal end of the monolithic multilayer distal outer member; and an inner tubular member having a guidewire lumen defined therethrough, the inner tubular member extending distally from a proximal port in the proximal end portion of the monolithic multilayer distal outer member through at least a portion of the balloon.