Apparatus for supplying respiratory gas and a method for controlling the apparatus
First Claim
1. 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.
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Accused Products
Abstract
The invention concerns an apparatus for supplying a respiratory gas and a method of controlling the apparatus. In accordance with the invention there is provided an apparatus for supplying a respiratory gas comprising a conveyor device for conveying the respiratory gas, a conduit means for feeding the respiratory gas conveyed by the conveyor device to a person, and a humidification device for humidifying the respiratory gas, which is distinguished by a sensor device for generating a signal indicative in respect of the respiratory gas humidity and a control device for controlling the humidification device having regard to the signal which is generated by the sensor device and which is indicative in respect of the respiratory gas humidity. Furthermore there is proposed a method of supplying a respiratory gas to a patient, in which the respiratory gas is introduced by means of a conveyor device into a conduit system leading to a patient and is humidified, wherein the conveyor device is operated in such a way that a respiratory gas pressure which is above ambient pressure obtains in the air conduit system, which is distinguished in that signals indicative in respect of the relative and/or absolute humidity of the respiratory gas are generated by means of a sensor device and the humidity of the respiratory gas is adjusted on the basis of the signals generated in that way.
33 Citations
34 Claims
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1. Apparatus for supplying a respiratory gas to a person comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of supplying a humidified respiratory gas above ambient pressure to a patient, in which a conveyor, including a humidification device, introduces the respiratory gas into a conduit system leading to a breathing mask in communication with an airway of the patient, the method comprising:
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arranging a first sensor on the breathing mask; arranging a second sensor on an outlet of the humidification device; generating a first signal, indicative of relative and/or absolute humidity of the respiratory gas, using the first sensor; generating a second signal, indicative of relative and/or absolute humidity of the respiratory gas using the second sensor; comparing the first and second signals; detecting a respiratory gas temperature change resulting from respiratory gas leakage near the breathing mask; and adjusting the humidity of the respiratory gas on the basis of the comparison of the generated signals and the detected respiratory gas temperature change resulting from respiratory gas leakage. - View Dependent Claims (17, 18)
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19. Apparatus for supplying a respiratory gas to a person comprising:
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a conveyor device to convey the respiratory gas; a hose conduit, arranged between the conveyor and the person, to feed the respiratory gas conveyed by the conveyor device to the person; a humidification device to humidify the respiratory gas; a first sensor device configured to generate a signal indicative of one or more respiratory gas conditions, including respiratory gas humidity; a second sensor device configured to generate a signal indicative of one or more ambient conditions, including ambient air humidity; wherein the apparatus is further operable 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, and wherein the control device 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. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification