Patent ID: 6736827
Filing Date: 2004-05-18
Classification: A61F

Abstract:
A catheter comprising:an elongate torque transmitting shaft having a core wire including a tip, the core wire extending distally from a radially symmetrical connection within a hollow portion, the connection having at least two lateral crimps formed in the hollow portion, the crimps touching the core wire to define open lobes arranged thereabout; an outer tube surrounding the core wire, a proximal end of the outer tube being coupled to the hollow portion; an inflatable balloon having a proximal end and a distal end, the proximal end mounted on the outer tube; a coiled tip spring having a proximal end coupled to the tip adjacent the distal end of the balloon; an inner tube surrounding the shaft beneath the outer tube and the balloon, a proximal end of the inner tube being coupled to the core wire, and a distal end of the inner tube being attached to the distal end of the balloon; and an inflation lumen extending from the interior of the balloon through an annular space formed between the outer and inner tubes, through the shaft connection, and through the hollow portion of the shaft.