MRI compatible handle and steerable sheath
First Claim
Patent Images
1. A MR compatible deflectable catheter comprising:
- a steerable sheath having a tubular shaft defining a longitudinal axis, said tubular shaft receiving first and second longitudinal movement wires operably coupled to a distal end thereof;
a control handle having a main body configured to receive first and second rack screws, said first and second rack screws being mechanically coupled to each other such that movement of said second rack screw along the longitudinal axis of the tubular shaft causes movement of said first rack screw in an opposite direction along the longitudinal axis of the tubular shaft, said second rack screw including a threaded portion on an outer surface at an end thereof;
said first longitudinal movement wire operably coupled to said first rack screw and said second longitudinal movement wire operably coupled to said second rack screw; and
a rotatable adjustment knob operably engageable with said control handle, said rotatable adjustment knob having an internal threaded portion matingly engageable solely with the threaded portion of said second rack screw, said rotatable adjustment knob solely rotatably moveable between a first position and a second position in which the internal thread is configured to engage solely the thread on the outer surface of said second rack screw,wherein said first position causes said second rack screw to move proximally along the longitudinal axis of the tubular shaft which in turn causes said first rack screw to move distally along the longitudinal axis of the tubular shaft and proximal movement of said second rack screw is configured to tension and cause proximal longitudinal movement of the second longitudinal movement wire,and further wherein said second position is configured to move said second rack screw distally along the longitudinal axis of the tubular shaft which in turn causes said first rack screw to move proximally and distal movement of said second rack screw is configured to release tension on the second longitudinal movement wire.
1 Assignment
0 Petitions
Accused Products
Abstract
An MR compatible deflectable catheter and method of using the same is provided. The MR compatible deflectable catheter includes a steerable sheath having a tubular shaft. The tubular shaft receives first and second longitudinal movement wires at a distal end thereof. A control handle is coupled to a proximal end of the first and second longitudinal movement wires and causes longitudinal movement of the wires.
85 Citations
19 Claims
-
1. A MR compatible deflectable catheter comprising:
-
a steerable sheath having a tubular shaft defining a longitudinal axis, said tubular shaft receiving first and second longitudinal movement wires operably coupled to a distal end thereof; a control handle having a main body configured to receive first and second rack screws, said first and second rack screws being mechanically coupled to each other such that movement of said second rack screw along the longitudinal axis of the tubular shaft causes movement of said first rack screw in an opposite direction along the longitudinal axis of the tubular shaft, said second rack screw including a threaded portion on an outer surface at an end thereof; said first longitudinal movement wire operably coupled to said first rack screw and said second longitudinal movement wire operably coupled to said second rack screw; and a rotatable adjustment knob operably engageable with said control handle, said rotatable adjustment knob having an internal threaded portion matingly engageable solely with the threaded portion of said second rack screw, said rotatable adjustment knob solely rotatably moveable between a first position and a second position in which the internal thread is configured to engage solely the thread on the outer surface of said second rack screw, wherein said first position causes said second rack screw to move proximally along the longitudinal axis of the tubular shaft which in turn causes said first rack screw to move distally along the longitudinal axis of the tubular shaft and proximal movement of said second rack screw is configured to tension and cause proximal longitudinal movement of the second longitudinal movement wire, and further wherein said second position is configured to move said second rack screw distally along the longitudinal axis of the tubular shaft which in turn causes said first rack screw to move proximally and distal movement of said second rack screw is configured to release tension on the second longitudinal movement wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification