Stryker Corporation

Stryker Instruments

Harry A Wellons, Iii

Richard Franklin Huyser

Donald W Malackowski

Jerry A Culp

Douglas Alan Staunton

David H Grulke

Dennis Alan Stratton

Mark A Wasserman

Eugene P Lautenschlager

Richard L Wixson

Patrick J Del Medico

A neuro-muscular electrical stimulation system provides a series of electrical pulses to instigate muscle twitch to aid in preventing the occurrence of deep vein thrombosis. The duration and duty cycle of the electrical pulses provided to a patient's muscle tissue is controlled to instigate muscle twitch without causing tetanic muscle contractions. The system preferably includes a single electrode that is placed upon each calve of a patient. The electrical stimulator device includes a unique housing and circuit board arrangement that facilitates easy assembly without requiring any soldering connections between the circuit board, a power source and electrical leads that are utilized to provide signals to the electrodes that are placed on the patient. The circuit board preferably is made from a slightly resilient plastic material that is flexed from a disconnected position into an electrically connected position upon assembly of the stimulator device.

Neuromuscular electrical stimulation for preventing deep vein thrombosis

Apparatus for mixing a two part cement of a type adapted for fixing a repair element to hard, rigid tissue of a patient and containing the mixed cement preparatory to dispensing for such fixation. A mixing chamber has an outlet for mixed cement. A cartridge has an inlet releasably coupled to the outlet of the mixing chamber for receiving mixed cement therefrom. A rotating blade in the mixing chamber mixes cement, removes voids therefrom and moves mixed cement off the inner surface of the mixing chamber and into the cartridge.

Surgical cement mixer apparatus

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Portage, MI, United States of America

Harry A Wellons, Iii