Patent ID: 7516740

Claim:
Apparatus for supplying a respiratory gas to a person comprising: a conveyor device to convey the respiratory gas; a breathing mask, worn by the person in use; a hose conduit, arranged between the conveyor and the breathing mask, to feed the respiratory gas conveyed by the conveyor device to the person via the breathing mask; a humidification device to humidify the respiratory gas; a first sensor device, arranged on the breathing mask, to generate a signal indicative of the respiratory gas humidity; a second sensor device arranged in the region of the humidification device at an outlet of the humidification device and configured to generate a signal indicative of the respiratory gas humidity; a temperature detection device to detect a respiratory gas temperature change resulting from respiratory gas leakage near the breathing mask; and a control device to control the humidification device, wherein the control device compares the signal from the first sensor device and the signal from the second sensor device to determine a change in the humidity of respiratory gas between the humidification device and the breathing mask, and wherein the control device is further adjusts the humidity and/or temperature of the respiratory gas when the detected respiratory gas temperature change resulting from respiratory gas leakage is below a certain threshold.