Closed circuit breathing device with pressure sensing means
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United States of America Patent
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-
Dec 31, 1991
Issued Date -
N/A
app pub date -
Jun 22, 1989
filing date -
Nov 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circulation respirator is capable of excess-pressure operation with a compressed gas source and an auxiliary pressure arrangement which brings about an increase in the pressure in the respiratory circulation. The apparatus includes measuring circuit connected to a pressure sensor for controlling the auxiliary pressure arrangement. Excess pressure is maintained in the respiratory circulation independently of the respiratory phase. The sensor is arranged as pressure sensor in the respiratory circulation only if the pressure falls below a preset positive nominal value of the pressure in the respiratory circulation. A method of operating a respirator system which includes a respirator bag connected through an inhalation duct to a patients respirator gas connector to the respirator bag comprising sensing the pressure in a pressurized respiratory gas connection to the inhalation duct, and connecting an additional pressurized gas to the inhalation duct when the pressure in the said gas connection falls below a predetermined pressure.
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