Abstract: A piston configured to be received within a syringe is disclosed. The piston includes a valve body defining a proximal end and a distal end, a filter disposed within the proximal end of the valve body, and a valve disk disposed within the distal end of the valve body. As the piston is advanced through the syringe, the valve disk is configured to provide fluid flow through the valve body.

Abstract: A piston configured to be received within a syringe is disclosed. The piston includes a valve body defining a proximal end and a distal end, a filter disposed within the proximal end of the valve body, and a valve disk disposed within the distal end of the valve body. As the piston is advanced through the syringe, the valve disk is configured to provide fluid flow through the valve body.

Abstract: A surgical pulsed irrigation handpiece comprises a pistol-like housing having a handle and a barrel extending forwardly from the top of the handle. A finger actuable trigger is provided on the handle front edge. An axially elongate pulsing pump extends longitudinally in the handle. An outlet tube extending from the top of the pump bends forwardly toward the front end of the barrel. The trigger controls pulsed liquid outflow from the pulsing pump through outlet tube. A preferred pulsing pump provides a piston axially slidable in a casing and a poppit axially slidable with respect to the piston. A first spring urges the piston rearward in the casing. A second spring urges the poppit forwardly with respect to the piston. A pumped liquid chamber in the casing ahead of the piston responds to piston reciprocation to provide a pulsed liquid outflow.

Abstract: Apparatus for selectively blocking passage of lipids in a liquid flow path. A baffle interposed in the liquid flow path is of nonpolar material and is arranged to permit liquid flow therethrough with contact of said liquid with the nonpolar material of the baffle for removing lipids from the flow. In one embodiment, the baffle is interposed between the wound drain connection and vacuum connection in a drain reservoir and protects the hydrophobic filter which is at the end of the vacuum passage communicating with the interior of the drain reservoir bottle. The baffle enables use of a nonpolar material for the hydrophobic filter and avoids coating and thereby clogging of the hydrophobic filter by lipids in the liquid drained from a wound.

Abstract: Portable apparatus for measuring and monitoring muscle compartment pressures comprising a system of a disposable assembly of a syringe, a pressure chamber having a diaphragm, and means to penetrate the skin of a patient, and a measuring and reading device comprising a transducer, whereby accurate measurement of such pressures can be easily made.

Abstract: Apparatus for selectively blocking passage of lipids in a liquid flow path. A baffle interposed in the liquid flow path is of nonpolar material and is arranged to permit liquid flow therethrough with contact of said liquid with the nonpolar material of the baffle for removing lipids from the flow. In one embodiment, the baffle is interposed between a wound drain connection and vacuum connection in a drain reservoir and protects a hydrophobic filter which is at the end of a vacuum passage communicating with the interior of the drain reservoir. The baffle enables use of a nonpolar material for the hydrophobic filter and avoids coating and thereby clogging of the hydrophobic filter by lipids in the liquid drained from a wound.

Abstract: A continuous vacuum drainage system for wound drainage. A base unit has apparatus responsive to releasable attachment thereto of a drain reservoir for evacuating the reservoir to a subatmospheric pressure in a predetermined range. The drain reservoir is continuously operable before, during and after release from the base unit for uninterrupted suction draining of a wound.