A dissector device having a rod-shaped hollow member, an expandable element with a pair of jaws arranged at a distal end of the rod-shaped member and a grip arranged at a proximal end of the rod-shaped member is provided. The dissector device has dispensing assembly for dispensing a fluid under pressure and has feeding channels and a dispensing channel associated with the jaws of the expandable element. The dispensing channel being has an outlet arranged proximate to or at the free end of the jaw. The feeding channels are arranged in fluid communication with a cavity of the rod-shaped member, whereby a fluid under pressure is fed throughout the cavity of the rod-shaped member in an operating condition of the dissector device.
