Catheter assembly with user-assisting handle

摘要

A catheter assembly includes a catheter, including an inner member and a sheath, extending from a handle. The handle includes a housing, a braking assembly, a carriage and a carriage driver. The braking assembly comprises a braking element within the housing interior and a braking element rotator. The carriage comprises at least one carriage braking surface engaging the braking element. The carriage driver, such as a spring, biases the carriage towards the proximal end of the handle. The inner member has a proximal end secured to the housing. The sheath has a proximal end secured to the carriage. Rotating the braking element causes the carriage to move proximally as the carriage braking surface slides along the braking element. This causes the sheath to move proximally relative to the inner member.

主权项

1. A catheter assembly comprising:
a catheter comprising an inner member and a sheath housing the inner member and axially slidable over the inner member; a handle comprising:
a housing having a proximal end, a distal end and an inner surface, the inner surface defining a housing interior, the housing having a housing axis;a braking element assembly comprising an elongate braking element located within the housing interior and a braking element rotator operably coupled to the braking element for selective rotation of the braking element about the housing axis;a carriage located within the housing interior and movable along the housing axis, the carriage comprising at least one carriage braking surface engaging the braking element; anda carriage driver biasing the carriage towards the proximal end of the handle; the inner member having a proximal end secured to the housing; the sheath having a proximal end secured to the carriage; andwhereby operation of the braking element rotator to cause the braking element to rotate in a first rotary direction allowing the carriage to move in a proximal direction, so that the sheath moves proximally relative to the inner member.