Respirator

Details Respirator Respirator

A - Human Necessities

61

M

A61M 16/00 (2006.01)

Patent

CA 2101647

2101647 9215355 PCTABS00016 A device for producing a continuous positive pressure in the respiratory passages during spontaneous breathing is described. Respiratory gas is introduced, under overpressure with modulated pressure oscillations, through nasopharyngeal tubes (9) into the nasopharyngeal-oral cavity (16) or through a special oropharyngeal tube with pressure-measurement channels (flexible tubes) (12, 13) and a wide-lumen gas supply channel (flexible tube) and a narrow-lumen venting channel. In this way, even large leaks in the mouth region can be compensated. To ensure the constancy of the desired therapeutic positive pressures in the nasopharyngeal-oral cavity (16) and the respiratory passages and lungs, which communicate with the nasopharyngeal-oral cavity (16), continuous electrical-electronic measurements are carried out on the pressurized gas by pressure probes (11) in the nasopharyngeal-oral cavity (16), and the supply of fresh respiratory gas is regulated in function of these measurements. Obstruction of the pressure probes (11), e.g., by nasal mucus, is detected immediately by the absence of oscillating pressure signals and any differences in pressure registered by the pressure probes (14, 15), and generally cleared due to the activation of an automatic blow-through device for the probes. Only in rare cases would an alarm be triggered.

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