METHODS AND DEVICES FOR TISSUE SLICING Russian patent published in 2014 - IPC A61B17/3207 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to catheters used for removing undesired tissue from the body, as well as for removing a material from a blood vessel to open the blood vessel and to improve a blood flow therein. An atherectomy catheter comprises a body with a hole, a pivoting shaft connected to the body; a knife connected to the pivoting shaft for rotation about a pivot axis; a chamber for tissue collection connected to the body and arranged in the distal direction in relation to the knife; and a flange extending in the outward direction to a cup-shaped surface of the knife. The knife has the cup-shaped surface and a cutting edge. The cup-shaped surface can re-direct the tissue sliced by the cutting edge into the distal direction when moving the cup-shaped surface in the distal direction. The flange extends in the outward direction from the cup-shaped surface of the knife and has a first wall extending from the cup-shaped surface; a distal wall and a bent cutting edge formed at the intersection of the first wall and distal wall. The flange is presented to direct the sliced particles of the material to at least one of the pivot axis of the knife and a long axis of the catheter or the chamber for tissue collection.

EFFECT: invention provides slicing solid and soft tissues and directing the sliced tissue particles to the catheter, particularly towards the catheter structures for particle collection.

15 cl, 13 dwg