Patent ID: 7938851
Filing Date: 2011-05-10
Classification: A61F,A61M

Abstract:
1. A catheter comprising: an elongated catheter shaft having a distal end and a proximal end and further comprising an inner shaft and an outer shaft, said outer shaft being slidably disposed over said inner shaft; an interventional element at the distal end of the catheter shaft, the interventional element having an adjustable length; an actuator attached to the proximal end of the catheter shaft for adjusting the length of the interventional element, said actuator having a longitudinal axis and including at least one lead screw configured to operatively couple a rotatable member to the catheter shaft, said rotatable member being rotatable around the longitudinal axis of the actuator; at least one threaded member configured to operatively couple said at least one lead screw and said catheter shaft, said at least one threaded member configured to travel axially along said at least one lead screw as the at least one lead screw rotates; a first threaded member configured to operatively couple a first lead screw to said outer shaft, said first threaded member configured to travel axially along said first lead screw as the first lead screw rotates, and a second threaded member configured to operatively couple a second lead screw to said inner shaft, said second threaded member configured to travel axially along said second lead screw as the at second lead screw rotates.