Miniature shredding tool for use in medical applications and methods for making

摘要

The present invention relates generally to the field of micro-scale or millimeter scale devices and to the use of multi-layer multi-material electrochemical fabrication methods for producing such devices with particular embodiments relate to shredding devices and more particularly to shredding devices for use in medical applications. In some embodiments, tissue removal devices are used in procedures to removal spinal tissue and in other embodiments, similar devices are used to remove thrombus from blood vessel.

主权项

1. A medical assembly for removing tissue from a patient, comprising:
a distal housing; first and second oppositely rotating tissue processing members rotatably mounted to the distal housing, each of the rotating tissue processing members comprising at least one disc-shaped blade having a series of teeth along an outer circumference of the blade, each blade lying in a plane parallel and offset to a plane of another blade, each blade being directly adjacent to at least one other blade and positioned to partially overlap the adjacent blade such that tissue may be sheared between the adjacent, overlapping blades, the tissue processing members configured to direct tissue from a target tissue site into the distal housing and to shred the tissue inside the distal housing; an elongate introducer coupled to the distal housing for advancing the distal housing adjacent the target tissue; a delivery member with a lumen adapted to receive the distal housing and the elongate introducer; an actuation member adapted to control operation of the first and second oppositely rotating tissue processing members.