초록 ▼

An instrument for providing high pressure fluid pulses for cutting tissue including an internal pressure intensifying mechanism, and the provision of a suction force at the distal end of the instrument including an internal vacuum generating device to increase the suction force provided by a convent

An instrument for providing high pressure fluid pulses for cutting tissue including an internal pressure intensifying mechanism, and the provision of a suction force at the distal end of the instrument including an internal vacuum generating device to increase the suction force provided by a conventional suction source. A piston mechanism is provided for converting a low pressure fluid input to a high pressure fluid output, and a second piston mechanism is provided to intensify the suction force created by a conventional suction source at the surgical site.

대표청구항 ▼

[ What is claimed is:] [1.] A surgical instrument for aspirating fluid and debris from a surgical site, comprisinga housing;cannula means extending from said housing;a suction source disposed in said housing for aspirating fluid and debris from said surgical site;a fluid port disposed on said housin

[ What is claimed is:] [1.] A surgical instrument for aspirating fluid and debris from a surgical site, comprisinga housing;cannula means extending from said housing;a suction source disposed in said housing for aspirating fluid and debris from said surgical site;a fluid port disposed on said housing for transporting aspirated fluid and debris from said housing, said suction source being disposed intermediate said cannula means and said fluid port;said suction source including vacuum generating means for creating a suction force at a distal end of said cannula means;a gas source connected to said instrument and a venting valve disposed in said housing; wherein said vacuum generating means comprises a piston member driven by said gas source and said venting valve, said gas source and said valve cooperating to reciprocatingly advance and retract said piston member;said vacuum generating means further including a biasing spring for retracting said piston member during venting of gas through said valve.