SLIDABLE VALVE ADAPTOR FOR STEERABLE SHEATH

摘要

An MR compatible steerable sheath with a slidable valve adaptor is provided. The slidable valve adaptor is configured to maintain the steerable shaft in a proximal position such that there is slack in first and second longitudinal movement wires when the valve adaptor is in a first position, and is configured to remove slack from the first and second longitudinal movement wires when the valve adaptor is slidably moved to the second position. Slidable valve adaptor also optionally includes a safety cap that prevents insertion of a catheter into the control handle until the valve adaptor is in the distal position.

主权项

1. An MR compatible steerable sheath comprising:
a steerable shaft including a proximal end and a deflectable distal tip, said steerable shaft configured to receive first and second longitudinal movement wires operably coupled to said deflectable distal tip, said proximal end slidably receivable within a lumen of a t-valve axel; a hemostasis valve assembly operably coupled to the proximal end of the steerable shaft; a slidable valve adaptor operably coupled to said hemostasis valve assembly and configured to be slidably receivable within said lumen of said t-valve axel; a control handle having a main body configured to receive said valve adaptor and hemostasis valve assembly and said first and second rack screws, said second rack screw including a threaded portion on an outer surface thereof, said steerable shaft extending axially through said control handle; said first longitudinal movement wire operably coupled to said first rack screw and said second longitudinal movement 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 with the threaded portion of said second rack screw, said rotatable adjustment knob moveable between a first position in which the internal thread is configured to engage the thread on the outer surface of said second rack screw and cause said second rack screw to move proximally to cause proximal longitudinal movement of the second longitudinal movement wire and a second position in which the internal thread is configured to move said second rack screw in a distal direction to release tension on the second longitudinal movement wire, wherein said valve adaptor is configured to remove said slack from said first and second longitudinal movement wires when slidingly moved to a second position.