Compressed air control device for a CPAP device and corresponding CPAP system

摘要

A compressed air control device for a CPAP device comprises a pressure measuring device for measuring a variation of the pressure in a hollow body of the CPAP device and for generating a corresponding pressure signal, a pressure variation evaluating device for evaluating the measured variation of the pressure according to at least one predetermined criterion and for generating a pressure modulation control signal based on the result of the evaluation, and a pressure modulating device for receiving a substantially constant compressed air stream and for outputting a modulated compressed air stream to the CPAP device. The pressure modulating device is configured in such a way that, in response to the pressure modulation control signal, it modulates the pressure of the compressed air stream output to the CPAP device.

主权项

1. Compressed air control device for a CPAP device comprising:
a pressure detection device for detecting a pressure curve of the pressure in a hollow body of the CPAP device and for producing a corresponding pressure signal; a pressure curve evaluation means for evaluating the detected pressure curve of the pressure in accordance with at least one predetermined criterion and for producing a pressure modulation control signal on the basis of the result of the evaluation; and a pressure modulation device for receiving a substantially constant compressed air stream and for outputting a modulated compressed air stream to the CPAP device, which pressure modulation device is formed in such a way that it modulates a pressure of the compressed air stream output to the CPAP device in response to the pressure modulation control signal; wherein the pressure curve evaluation means is formed in such a way that it detects an apnoeic phase during the evaluation and, in response to a detection of this type, outputs to the pressure modulation device a pressure modulation control signal to trigger a pressure pulse in the modulated compressed air stream; wherein the pressure curve evaluation means for recognising an apnoeic phase detects whether the pressure is substantially constant for a predetermined period, the predetermined period preferably being in the range from 2 to 5 s; wherein the pressure curve evaluation means is formed in such a way that it detects natural breathing reflexes during the evaluation and, in response to a detection of this type, outputs to the pressure modulation device a pressure modulation control signal to trigger a pressure pulse in the modulated compressed air stream, which pulse is correlated with the natural breathing reflex; and wherein the pressure pulses are synchronised with natural breathing reflexes.