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1. (WO1999008594) PNEUMATIC SENSOR FOR DETECTING A BREATHING PROCESS AND APNOEA MONITORING UNIT

Pub. No.:    WO/1999/008594    International Application No.:    PCT/RU1997/000257
Publication Date: Feb 25, 1999 International Filing Date: Aug 14, 1997
IPC: A61B 5/093
Applicants: BURYLOV, Dmitry Alexeevich

KOTOV, Vadim Petrovich

KUZNETSOV, Pavel Borisovich

KUROCHKIN, Vladimir Efimovich

Inventors: BURYLOV, Dmitry Alexeevich

KOTOV, Vadim Petrovich

KUZNETSOV, Pavel Borisovich

KUROCHKIN, Vladimir Efimovich

Title: PNEUMATIC SENSOR FOR DETECTING A BREATHING PROCESS AND APNOEA MONITORING UNIT
Abstract:
The present invention relates to a pneumatic sensor for detecting a breathing process, wherein said sensor comprises two rigid plates (1, 2) which are connected together along an edge (3), one at least of said plates being capable of rotation relative to the other. The plates are separated by a resilient member (6, 7) which is subject to deformation and has an inner volume filled with air and isolated from the environment. The inner volume of the member subject to deformation (6, 7) is further connected to a converter (10) for converting a pressure into an electric signal. This invention also relates to an apnoea monitoring unit that may include the above-mentioned pneumatic sensor. This monitoring unit comprises an amplifier for amplifying the signal from the pneumatic sensor as well as a comparator that generates pulses corresponding to a breathing process when the output signal from the amplifier exceeds an absolute value of the comparator threshold level. The amplification ratio of the amplifier and the threshold level of the comparator are automatically adjusted by a control unit according to the value of the output signal from said amplifier.