A device is provided for increasing humidity for respirating patients, especially for a respiration humidifier or an anesthesia reflector. The device includes a gas channel for passing through breathing air, a control and/or regulating device, a temperature sensor and a dew sensor for measuring the
A device is provided for increasing humidity for respirating patients, especially for a respiration humidifier or an anesthesia reflector. The device includes a gas channel for passing through breathing air, a control and/or regulating device, a temperature sensor and a dew sensor for measuring the humidity present in the breathing air by electromagnetic radiation with a generating device and with a detection device for electromagnetic radiation. The humidity of the breathing air is determined at a low cost and in a reliable manner and condensation is avoided in the respiration system without any additional effort for sterilization. Humidity in the breathing air is determined by the a dew sensor by the change in the reflection of the electromagnetic radiation as a function of dew formation at a condensation-fogged and condensation-free boundary surface between breathing air and a medium having an optical density higher than that of breathing air.
대표청구항▼
1. A device for respirating patients, respiration humidification or for an anesthesia reflector, the device comprising: humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in breathing gas;a gas channel for passing through breathing gas;a med
1. A device for respirating patients, respiration humidification or for an anesthesia reflector, the device comprising: humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in breathing gas;a gas channel for passing through breathing gas;a medium having an optical density higher than that of breathing gas and defining a boundary surface between the breathing gas and said medium;a control and/or regulating means connected to the humidification/anesthetic concentration means;a temperature sensor connected to the control and/or regulating means; anda dew sensor for measuring the humidity contained in the breathing air, said dew sensor including a generating means for generating electromagnetic radiation and said medium allowing at least a portion of the generated electromagnetic radiation to pass through the medium and said dew sensor including a detection means for detecting electromagnetic radiation, wherein said dew sensor determines a change in a reflection of electromagnetic radiation at the boundary surface between the breathing gas and the medium having the optical density higher than that of breathing gas as an indicator of a change in dew formation at said boundary surface, said control and/or regulating means being connected to said dew sensor and acting on the humidification/anesthetic concentration means for increasing the humidity in the breathing gas until the humidity reaches a limit value corresponding to the detected change in dew formation at said boundary surface. 2. A device for respirating patients in accordance with claim 1, wherein the medium having the higher optical density is a solid. 3. A device for respirating patients in accordance with claim 1, wherein the medium having the higher optical density is glass or a plastic transparent to electromagnetic radiation. 4. A device for respirating patients in accordance with claim 2, wherein the medium having the higher optical density comprises a methyl methacrylate. 5. A device for respirating patients in accordance with claim 1, wherein the boundary surface is arranged at the humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in the breathing gas. 6. A device for respirating patients in accordance with claim 2, further comprising a heater, wherein the solid is heated by said heater. 7. A device for respirating patients in accordance with claim 1, further comprising additional sensors for sensing parameters including one or more of temperature, CO2 or breathing gas volume, said additional sensors being integrated into a sensor block arranged at said dew sensor. 8. A device for respirating patients in accordance with claim 2, wherein said solid of said medium having the higher optical density comprises one of a sample holder and a wall of said gas channel and a housing of said humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in the breathing gas. 9. A process for controlling and/or regulating the humidity of breathing gas in a device for respirating patients, the process comprising the steps of: providing a humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in breathing gas;providing a gas channel for passing through breathing gas;providing a control and/or regulating means;providing a medium having an optical density higher than that of breathing gas, the medium having a surface defining a boundary surface between the breathing gas and said medium;providing a temperature sensor;providing a dew sensor including a generating means for generating electromagnetic radiation and introducing the generated electromagnetic radiation into the medium and a detection means for detecting electromagnetic radiation, wherein said dew sensor determines a change in a reflection of electromagnetic radiation at a boundary surface between the breathing gas and the medium having the optical density higher than that of breathing gas as an indicator of a change in dew formation at said boundary surface;measuring the humidity contained in the breathing gas by means of the dew sensor;analyzing data determined by the dew sensor and controlling and/or regulating the humidity of the breathing gas on the basis of the data measured by the dew sensor, wherein the detection of the humidity of the breathing gas comprises the following steps:generating an electromagnetic radiation;sending the electromagnetic radiation to the boundary surface between breathing gas and the medium having the optical density higher than that of breathing gas with at least partial reflection of the electromagnetic radiation at the boundary surface;detecting the electromagnetic radiation reflected at the boundary surface only,analyzing the quantity of reflected electromagnetic radiation to determine the change in dew formation at the boundary surface; andincreasing the humidity in the breathing gas until, with the humidification/anesthetic concentration means such that the humidity reaches a limit value corresponding to a detected change in dew formation at said boundary surface. 10. A process in accordance with claim 9, wherein the humidity in the breathing gas is increased until a reduction in the reflection of the electromagnetic radiation appears because of the formation of water of condensation on the surface of the medium having the higher optical density. 11. A process in accordance with claim 10, wherein the medium having the higher optical density is heated during the formation of water of condensation on the surface of the medium having the higher optical density in order to evaporate the water of condensation. 12. A process in accordance with claim 9, wherein the humidity in the breathing gas is reduced when a limit value of the humidity in the breathing gas is reached. 13. A process in accordance with claim 9, wherein the humidity in the breathing gas is reduced when the reflection of the electromagnetic radiation decreases because of the formation of water of condensation on the surface of the medium having the higher optical density. 14. A process in accordance with claim 9, wherein controlling and/or regulating the humidity of the breathing gas on the basis of the data measured by the dew sensor includes raising or lowering the temperature in the humidifying chamber of a respiration humidifier to increase or reduce of the humidity in the breathing gas. 15. A respiration device comprising: a breathing gas channel carrying breathing gas;humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in the breathing gas;a control and/or regulating means for regulating said humidification/anesthetic concentration means, said control and/or regulating means being connected to said humidification/anesthetic concentration means;a temperature sensor connected to said control and/or regulating means; anda dew sensor for measuring the humidity contained in the breathing gas, said dew sensor being connected to said control and/or regulating means and comprising:an electromagnetic radiation generating means for generating electromagnetic radiation;an electromagnetic radiation detection means for detecting electromagnetic radiation;a medium having an optical density higher than that of the breathing gas and allowing at least a portion of the generated electromagnetic radiation to pass through the medium, said medium having a first side and having an opposite second side defining a boundary surface positioned in contact with the breathing gas, said electromagnetic radiation generating means directing generated electromagnetic radiation at said boundary surface by introducing the generated electromagnetic radiation at said first side such that is passes through said medium to said boundry surface and said electromagnetic radiation detection means receiving electromagnetic radiation reflected at said boundary surface after passing through said medium from said second side to said first side, to determine a change in a reflection of electromagnetic radiation at said boundary surface, said control and/or regulating means acting on the humidification/anesthetic concentration means for increasing the humidity in the breathing gas until a reduction in the reflection of the electromagnetic radiation occurs because of the formation of water of condensation on the surface of the medium. 16. A device in accordance with claim 15, wherein the medium having the higher optical density is a solid glass or a plastic transparent to the generated electromagnetic radiation, the solid glass or plastic forming or defining at least a part of said breathing gas channel. 17. A device in accordance with claim 16, wherein the boundary surface is arranged at the humidification/anesthetic concentration means for increasing the humidity and/or the anesthetic concentration in the breathing gas. 18. A device in accordance with claim 16, further comprising a heater for heating the solid. 19. A device in accordance with claim 15, further comprising additional sensors for sensing parameters including one or more of temperature, CO2 or breathing gas volume, said additional sensors being integrated into a sensor block arranged at said dew sensor.
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이 특허에 인용된 특허 (3)
Dosoretz Victor J. (Waban MA) Ronchinsky Stanley (Newton Center MA), Chilled mirror hygrometer with performance monitoring.
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