Gas supplying head enclosure with expandable pressure indicator

Details Gas supplying head enclosure with expandable pressure indicator Gas supplying head enclosure with expandable pressure indicator

1993-08-31

1996-08-06

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820123, 12820128, 12820526, 12820423, 600 21, A61M 1600, A62B 1810, F16K 3102, A61G 1000

Patent

active

055424147

ABSTRACT:
An apparatus for monitoring a respiratory gas flow, comprising a gas collector unit (8), which separates an ambient gas space from that remaining inside the gas collector unit and in which a patient respires the gas contained in said gas collector unit. A conduit (7) flows a respiratory gas from one or more gas sources (1) into the gas collector unit (8) to be respired by a patient, and a conduit (14) delivers a respiratory gas, which at least partially contains a gas exhaled by a patient, from the gas collector unit (8) to a measuring device (13) for examination. The pressure difference between a gas space protected by the gas collected unit and a gas space existing outside it is indicated by a pressure-difference detecting element (17). A method for monitoring a respiratory gas flow compares the pressure of a respiratory gas existing inside the gas collector unit (8) with that prevailing outside the gas collector unit and adjust gas flows accordingly.

REFERENCES:
patent: 3786809 (1974-01-01), Kitrilakis
patent: 3898987 (1975-08-01), Elam
patent: 4671297 (1987-06-01), Schulze, Jr.
patent: 4763664 (1988-08-01), Merilainen
patent: 4827964 (1989-05-01), Guido et al.
patent: 4832042 (1989-05-01), Poppendiek et al.
patent: 4856531 (1989-08-01), Merilainen
patent: 5335653 (1994-08-01), Blomqvist

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