Calibration apparatus for the pressure gauges of a whole-body pl

Details Calibration apparatus for the pressure gauges of a whole-body pl Calibration apparatus for the pressure gauges of a whole-body pl

1995-11-13

1997-04-15

Sykes, Angela D.

Surgery

Truss

Pad

128718, 73149, 73 166, 73 168, A61B 508

Patent

active

056200056

ABSTRACT:
A whole-body plethysmograph having a calibration of the pressure gauge is provided, which includes an air tight, lockable cubicle for the reception of a person to be examined, a cubicle-pressure pressure gauge that responds to the interior pressure of the cubicle. A mouthpiece is provided with a valve, by means of which the respiratory air flow can be barred, and a closure-pressure pressure gauge is connected to the mouthpiece for measuring the pressure in the mouth of a person, as well as an evaluation unit connected to both the cubicle-pressure pressure gauge and the closure-pressure pressure gauge. A piston pump is connected to said cubicle, so as to be air tight. The piston pump is surrounded by the air tight box, to which the closure-pressure pressure gauge is, at times, connected for calibration and the pressure fluctuations generated by the piston pump are used to calibrate the cubicle-pressure pressure gauge and the closure-pressure pressure gauge.

REFERENCES:
patent: 2569849 (1951-10-01), Emerson
patent: 5105825 (1992-04-01), Dempster
patent: 5379777 (1995-01-01), Lomask

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