Surgery – Truss – Pad
Patent
1996-07-11
1998-03-17
Bahr, Jennifer
Surgery
Truss
Pad
128716, 128720, 128725, A61B 508
Patent
active
057275629
ABSTRACT:
A respiration monitor includes a sensing element having a pressure chamber filled with gas. The sensing element is adapted to be placed in contact with a breathing subject, with the pressure in the chamber increasing as the subject inhales and decreasing as the subject exhales. A pressure switch in communication with the pressure chamber opens as the subject exhales and closes as the subject inhales to control the operation of a timing circuit. The timing circuit includes an audio alarm mechanism activated when the switch is not closed within a predetermined threshold period. The chamber has at least one gas port which places the chamber in communication with ambient air pressure, so that within a pressure equalization time interval the pressure within the chamber equalizes to that of ambient air pressure and the switch is opened. This port is sized so that the pressure equalization time interval is longer than the normal cycle of inhalation and exhalation of the subject but shorter than the predetermined threshold period. The size, or number openings, comprising the port is sufficiently restrictive so that changes in pressure within the gas chamber are detected, causing the switch to operate to open or close as required.
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Bahr Jennifer
Connors John J.
Huang Stephon
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