Surgical apparatus

A disposable surgical tool for removing tissue from with a living organism through a small incision comprising in combination:

• an elongated cylinder defining a lumen therethrough, the cylinder having a first end sharpened to form a cutting edge;
• a hub including an elongated tubular portion within which the cylinder is received and secured, the hub being provided with a sealing device which is rigidly secured to the housing and preventing leakage through the lumen when no instrument is inserted through the lumen;
• a trocar mounted coaxially with said cylinder and movable longitudinally to selectively expose said cutting edge for selective engagement with tissue to be cut, expose an arc of said cutting edge or covering said cutting edge;
• a housing adapted to be held in one hand of a surgeon supporting said elongated cylinder for rotation about the longitudinal axis of said cylinder and supporting said trocar for selective linear movement along said cylinder, said housing providing access to the interior of said cylinder for removal of tissue there through;
• a motor mounted in said housing for selectively rotating said cylinder;
• a. battery mounted within said housing and operably connected to supply power to said motor;
• a switch mounted on said housing and electrically connected between said motor and said battery so as to connect opposing wiring in said motor to prevent rotation of said motor when said motor is not energized through said switch;
• a cam surface formed on said housing proximal and cooperative with said trocar such that rotation of said trocar about said cylinder cams said trocar between said positions;
• and
• a plurality of annularly spaced slots formed on said trocar proximal said housing and a locking member formed on said housing for selectively engaging one of said slots to selectively fix said trocar in relation to said cam surface,
• wherein said surgical tool is intended for a single use,
• wherein the switch effects an immediate stopping of the motor by short circuiting two poles of the motor,
• wherein said locking member is a guard for a human actuable switch for controlling said morcellator, wherein said guard is selectively movable into engagement with one of said plurality of slots.