ROTATIONAL ATHERECTOMY DEVICE WITH EXCHANGEABLE DRIVE SHAFT AND MESHING GEARS

摘要

An atherectomy device with an exchangeable drive shaft is disclosed, having a drive shaft gear at a distal end of the exchangeable drive shaft for meshing engagement with a prime mover gear on the output shaft of the prime mover. The exchangeable drive shaft is inserted into an opening at the distal end of the handle housing and moved axially in a proximal direction. Surface features on at least the prime mover housing and the engageable drive shaft help to align the drive shaft gear with the prime mover gear for meshing engagement.

主权项

1. A device, comprising:
a handle, comprising:
a proximal section;a distal section comprising a channel extending proximally from an opening in a distal end of the handle; andan elongated hollow intermediate section between the proximal section and the distal section, the intermediate section comprising:
an opening between an interior thereof and the channel in the distal section; anda slot; a prime mover carriage comprising a prime mover, the prime mover carriage disposed within the interior of the intermediate section; a prime mover gear fixedly attached to a shaft of the prime mover; a control knob having at least a portion thereof extending through the slot and operationally coupled to the prime mover carriage such that a longitudinal displacement of the control knob induces a longitudinal displacement of the prime mover carriage, the control knob comprising:
an unlocked state for permitting the longitudinal displacement of the control knob; anda locked state for inhibiting the longitudinal displacement of the control knob; an exchangeable drive shaft cartridge, comprising:
a proximal section and a distal section;a drive shaft comprising a proximal end and a distal end, the drive shaft extending through an opening in a distal end of the drive shaft cartridge;a gear engagement assembly, comprising a drive shaft gear fixedly attached to the proximal end of the drive shaft; a first connector for removably and pivotally connecting the handle and the drive shaft cartridge to one another; and a second connector for removably connecting the handle and the drive shaft cartridge to one another.