Pressure regulated irrigation system for arthroscopy

Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...

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Details

128DIG12, 604 5, 604 35, 604118, F16K, A61B 1732

Patent

active

046040897

ABSTRACT:
A pressure regulated system for an irrigation system including a reservoir of irrigation fluid, a pump, catheters for providing access to and egress from the irrigation site and a pressure regulation circuit, all connected in series with one another. The pressure regulation circuit includes a flow restriction branch having a normally-open valve and a variable orifice, diaphragm-operated, restrictor and a pressure accumulation branch, having a check valve, accumulator, and a normally-closed valve. A conduit running from the pressure accumulation branch to the diaphragm controls the pressure regulator. The operator may raise the pressure by closing the normally-open valve to direct pump flow to the pressure accumulation branch and thereby restrict the orifice of the pressure regulator until the desired pressure has been reached, and then releases the valve to maintain that pressure. To reduce the pressure, one opens the normally-closed valve to vent the pressure accumulation branch and reduce the pressure in the diaphragm of the pressure regulator.

REFERENCES:
patent: 3110469 (1963-11-01), Becker
patent: 3429313 (1969-02-01), Romanelli
patent: 3604419 (1971-09-01), Diskin
patent: 3830234 (1974-08-01), Kopp
patent: 4117843 (1978-10-01), Banko
patent: 4184510 (1980-01-01), Murry et al.
patent: 4237879 (1980-12-01), Genese
patent: 4411792 (1983-10-01), Babb
patent: 4490135 (1984-12-01), Troutner

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