Patent ID: 7905895

Claim:
A surgical device for removing tissue cells from a biological structure, comprising a fluid jet device for generating a fluid jet capable of separating cells and a suction device for suctioning off separated tissue cells and the injected fluid, an operating handpiece connected with the fluid jet device and the suction device, wherein the operating handpiece comprises an outer suction tube and a co-axial inner injection cannula extending through the suction tube, the outer suction tube and the inner injection cannula forming therebetween an annular suction channel, the suction tube includes one or more rows of radial suction openings, and the distal end of the co-axial injection cannula is closed by a conical tip having a cone base and forming a surface, the surface includes a nozzle slit that forms a flat jet, wherein the nozzle slit is inclined by an angle (α) with respect to an axial plane of the injection cannula, with the angle (α) being selected so that the flat fluid jet with at least one separation tip, a first separation edge, and a second separation edge and a peeling surface is formed, and wherein the angle (α) extends from the cone base to one of two visible edges of the conical tip.