Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1994-11-23
1996-09-24
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820423, 12820522, 12820524, A61M 1600, A62B 700, A62B 900, F16K 3126
Patent
active
055580866
ABSTRACT:
A portable apparatus for supplying dosages of an oxygen-containing gas to the respiratory tract of a person in synchronization with the inhalation phase of the respiratory cycle of said person comprising: (a) a low voltage step control relay with an inlet port for connecting to a source of oxygen-containing gas having a gas proportion regulator; (b) a low voltage microbridge mass gas flow sensor connected to a gas outlet for connection to the respiratory tract of the person said gas flow sensor sensing the duration of oxygen containing gas flow during each inhalation phase of the respiratory cycle of the person and transmitting corresponding information to a microcontroller; (c) a programmed low voltage microcontroller for receiving electrical signals from the gas flow sensor upon detection by the gas flow sensor of the beginning or termination of inhalation by the person; (d) a portable low voltage electrical power supply for operating the low voltage gas flow sensor, the low voltage microcontroller, and the low voltage step control relay; (e) a display panel connected to the microcontroller and the gas flow sensor for displaying programmed data from said microcontroller, and data received from said gas flow sensor; and (f) a keyboard connected to said microcontroller for enabling manual commands to be conveyed to said microcontroller.
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"7200 Series" Puritan-Bennett, Overland Park, KS, USA, 66225; Forms AA-763 (Mar. 1989), 991 (Dec. 1987), 985 (Jan. 1987), 1143 (Dec. 1987), 992 (Sep. 1988), 1236 (Oct. 1987), 934 (May 1984), 639 (Jun. 1987), 214 (Aug. 1988).
Smith Donald M.
Townley Roderick M.
Asher Kimberly L.
Freedom Air Services
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