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 trough; andan elongated hollow intermediate section between the proximal and the distal sections, the intermediate section comprising:
an opening between an interior thereof and the trough; 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; anda gear engagement assembly comprising a drive shaft gear fixedly attached to the proximal end of the drive shaft; and one or more connectors for removably connecting the handle and the drive shaft cartridge to one another, wherein each of the one or more connectors comprises complementary first and second sections, wherein
the first section is integrally formed with the handle; andthe second section is integrally formed with the drive shaft cartridge; wherein, the handle and the drive shaft cartridge are removably connected by:
inserting at least the gear engagement assembly through the opening in the intermediate section of the handle;removably meshing the prime mover gear and the drive shaft gear by juxtaposing the prime mover carriage and the gear engagement assembly; anddisplacing the handle and the drive shaft cartridge in opposite directions.