Patent ID: 9592069
Date: 2017-03-14
CPC Classifications: A61B

Claim:
1. A differential dissecting instrument (DDI) for differentially dissecting complex tissue comprising: a handle, having a central, longitudinal axis; a distal end of the instrument configured to be pointed at a complex tissue, and a proximal end of the instrument configured to be pointed at a user; an elongate member having a distal end and a proximal end, the proximal end of the elongate member connected to the handle; and a differential dissecting member rotatably attached to the distal end of the elongate member, the differential dissecting member having an axis of rotation and comprising: a mechanism, configured to mechanically rotate the differential dissecting member around the axis of rotation thereby causing the at least one tissue-engaging surface to move in at least one direction against the complex tissue, the mechanism comprising: wherein the at least one tissue-engaging surface is configured to selectively engage the complex tissue such that when the differential dissecting member is pressed into the complex tissue, the at least one tissue-engaging surface moves across the complex tissue and the at least one tissue-engaging surface disrupts at least one soft tissue in the complex tissue, but does not disrupt firm tissue in the complex tissue, and wherein the differential dissecting member, and the mechanism configured to mechanically rotate the differential dissecting member around the axis of rotation that are distal from the cam shaft, form an output shaft and tip assembly, and a compressed compression spring is configured to force the output shaft and the tip assembly toward the distal end of the instrument, such that travel of the output shaft and the tip assembly toward the distal end of the instrument is resisted and thus limited by tension in the opposed pair of force-transmitting members.