Fluid management system
First Claim
Patent Images
1. A disposable plastic pump cassette for use in an endoscopic surgical procedure, comprising a housing;
- an inflow pump means in said housing for supplying liquid under pressure to a body cavity during the endoscopic procedure, and inlet and outlet conduit means within said housing for supplying liquid to and delivering liquid under pressure from said inflow pump means; and
a chamber in said housing having an open end, a thin, flexible diaphragm closing said open end, and channel means in said outlet conduit means for directing liquid delivered from said pump means to said chamber.
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Abstract
Apparatus for supplying liquid to a body cavity during an endoscopic procedure includes a feedback loop-controlled liquid supply device inherently capable of supplying liquid at a substantially constant pressure substantially independent of the flow rate of liquid delivered by the liquid supply device within a relatively wide range of flow rate. Also disclosed are a disposable plastic pump cassette having an inflow pump in a housing, and an operative cannula. The surgical procedure is performed with continuous control over the body cavity pressure, regardless of the outflow flow rate.
180 Citations
20 Claims
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1. A disposable plastic pump cassette for use in an endoscopic surgical procedure, comprising a housing;
- an inflow pump means in said housing for supplying liquid under pressure to a body cavity during the endoscopic procedure, and inlet and outlet conduit means within said housing for supplying liquid to and delivering liquid under pressure from said inflow pump means; and
a chamber in said housing having an open end, a thin, flexible diaphragm closing said open end, and channel means in said outlet conduit means for directing liquid delivered from said pump means to said chamber. - View Dependent Claims (2, 3, 4, 5)
- an inflow pump means in said housing for supplying liquid under pressure to a body cavity during the endoscopic procedure, and inlet and outlet conduit means within said housing for supplying liquid to and delivering liquid under pressure from said inflow pump means; and
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6. A disposable plastic pump cassette for use in an endoscopic surgical procedure, comprising a housing;
- an inflow pump means in said housing for supplying liquid under pressure to a body cavity during the endoscopic procedure, and inlet and outlet conduit means within said housing for supplying liquid to and delivering liquid under pressure from said inflow pump means; and
pressure-sensing means in said housing for sensing a pressure of a liquid, and channel means in said outlet conduit means for directing liquid delivered from said pump means to said pressure-sensing means. - View Dependent Claims (7, 8, 9, 10, 16, 17, 18, 19, 20)
- an inflow pump means in said housing for supplying liquid under pressure to a body cavity during the endoscopic procedure, and inlet and outlet conduit means within said housing for supplying liquid to and delivering liquid under pressure from said inflow pump means; and
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11. A disposable plastic pump cassette for use in an endoscopic surgical procedure, comprising:
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a housing; an inflow pump in said housing for supplying liquid under pressure to a body cavity during the endoscopic procedure; inlet and outlet conduits within said housing for respectively supplying liquid to and delivering liquid under pressure from said inflow pump; and a chamber in said housing having an open end, a thin, flexible diaphragm closing said open end, wherein said outlet conduit includes a channel for directing liquid delivered from said pump to said chamber. - View Dependent Claims (12, 13, 14, 15)
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Specification