초록 ▼

An apparatus for controlling the volume of surgical fluid present in a cavity of the body during surgery includes a fluid pump for pumping surgical fluid to the cavity via a conduit. A dampener is disposed between the pump and the cavity, with the dampener receiving the fluid output of the pump and

An apparatus for controlling the volume of surgical fluid present in a cavity of the body during surgery includes a fluid pump for pumping surgical fluid to the cavity via a conduit. A dampener is disposed between the pump and the cavity, with the dampener receiving the fluid output of the pump and having a pressure sensitive volumetric capacity, therefor such that variations in output volume of the pump are diminished by the dampener, the output of which is directed to the cavity. The dampener may be in the form of a hollow chamber into which surgical fluid flows trapping a selected quantity of gas thereabove with the gas quantity being determined by a vent valve. A hydrophobic filter or a float valve may be employed as the vent valve.

대표청구항 ▼

An apparatus for controlling the volume of surgical fluid present in a cavity of the body during surgery includes a fluid pump for pumping surgical fluid to the cavity via a conduit. A dampener is disposed between the pump and the cavity, with the dampener receiving the fluid output of the pump and

An apparatus for controlling the volume of surgical fluid present in a cavity of the body during surgery includes a fluid pump for pumping surgical fluid to the cavity via a conduit. A dampener is disposed between the pump and the cavity, with the dampener receiving the fluid output of the pump and having a pressure sensitive volumetric capacity, therefor such that variations in output volume of the pump are diminished by the dampener, the output of which is directed to the cavity. The dampener may be in the form of a hollow chamber into which surgical fluid flows trapping a selected quantity of gas thereabove with the gas quantity being determined by a vent valve. A hydrophobic filter or a float valve may be employed as the vent valve. the locking member with the trailing end face of the cassette, and a spring biased lever adapted to abut against a leading end face of the cassette and connected to a sensor for detecting presence and absence of the cassette, the detection of one of the presence and absence of the cassette and ejection of the cassette from a loading position being performed by cooperation of the lever and the locking member. 5. The apparatus according to claim 1, wherein the diaphragm is adapted to be positioned in a pump chamber said pumping actuating means having a switching valve that communicates with the pump chamber to switch the diaphragm between the positive pressure state and the negative pressure state, the pumping actuating means including a vacuum pump connected to the pump chamber, reserve tanks for providing positive and negative pressures, and pressure sensors for detecting pressures in the reserve tanks to monitor a supply amount of the dialysis fluid. 6. The apparatus according to claim 1, including a memory card attachable to and detachable from said body for altering a screen of the display. 7. A peritoneal dialysis apparatus on which a disposable cassette, integrally formed with a fluid distributing diaphragm, a heating portion forming upper and lower systems of flow paths through a gap and a flow path switching portion, is loaded and which is used by connecting to a dialysis fluid container storing a dialysis fluid and a drained fluid container, comprising: a body provided with a operating portion and a display; cassette loading means or detachably loading the cassette; pumping actuating means for setting the diaphragm in a positive pressure state and negative pressure state, after the cassette is mounted, to distribute the fluid from the dialysis fluid container and to the drained fluid container; heater means having three layers of sheet heaters that come into contact with the upper and lower systems of flow paths in which the dialysis fluid stays to perform heating from above and below, thereby heating an amount of dialysis fluid in the heating portion to a patient's body temperature after the cassette is mounted; flow path switching means connected to a plurality of said dialysis fluid containers and which is made of flexible tubes and a plurality of dampers for opening/closing the flow path switching portion in order to form a flow path through which the heated dialysis fluid heated by the heater means is distributed into a peritoneal cavity of a patient continuously and, after a period of time elapses, the dialysis fluid is sucked and drained from the peritoneal cavity; and control means connected the operating portion, the display, said cassette loading means, said pumping actuating means, said heater means, and said flow path switching means to control the operating portion, the display, said cassette loading means, said pumping actuating means, and said flow heater means, and said flow path switching means. 8. The apparatus according to claim 7, wherein said plurality of clampers are continuously and intermittently moved by a plurality of cam shafts having a plurality of cams with driving portions of the cam shafts, thereby opening/closing said flow path switching portion. 9. The apparatus according to claim 8, wherein the clampers of said flow path switching means have larger diameter restoring coil springs for abutting the clampers against cam surfaces of the cams, and smaller diameter coil springs preventing a flow path of said flow path switching portion from being closed excessively. 10. The apparatus according to claim 7, wherein the mounting portion includes an opening in a surface of the body through which the cassette is inserted, and including cassette elevating means for vertically moving the cassette after the cassette is inserted through the opening, the cassette being moved from a lower position to an operative position by the cassette elevating means to position the cassette