Insufflator

Details Insufflator Insufflator

1990-08-15

1992-10-06

Pellegrino, Stephen C.

Surgery

Means for introducing or removing material from body for...

Gas application

604 23, 128747, 141 83, 141197, A61M 1300

Patent

active

051527456

ABSTRACT:
By means of the invention, the pressure in a cavity can be measured, without ever reducing the gas flow to zero. This is achieved by bleeding an intermediate vessel slightly with its inlet valve closed and its outlet valve open and then being able to extrapolate from the pressure decrease whether the desired pressure has been reached. If the result of the extrapolation indicates that the desired pressure has not been reached, then pumping is repeated, measuring is repeated and so on and so forth until the extrapolation indicates that the desired pressure has been reached. Thus extrapolations are made instead of allowing the intermediate vessel to empty completely.

REFERENCES:
patent: 3870072 (1975-03-01), Lindemann
patent: 4527600 (1985-07-01), Fisher et al.
patent: 4676774 (1987-06-01), Semm et al.
patent: 4874362 (1989-10-01), Wiest et al.
patent: 4966578 (1990-10-01), Baier et al.
patent: 5006109 (1991-04-01), Douglas et al.
patent: 5006997 (1991-04-01), Reich
patent: 5013294 (1991-05-01), Baier
patent: 5098375 (1992-03-01), Baier

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