Exhalation acquisition device for liver disease patients and photo-acoustic detection method for ammonia and methyl mercaptan in exhalations
A technology for collecting devices and patients, applied in measurement devices, sampling devices, color/spectral characteristic measurement, etc., can solve problems such as undetectable methyl mercaptan
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Embodiment 1
[0021] Embodiment 1: A kind of exhalation collection device for patients with liver diseases, including a respiratory mask 1 and an exhalation collection device, the respiratory mask 1 is an ear-hook type mask 1, the front of the mask 1 has an air outlet, and there are two holes on both sides of the air outlet. An air inlet valve 3, the mask 1 is a polyvinyl chloride mask 1, the air outlet is connected to the first gas pipeline, the first gas pipeline is equipped with a one-way valve 4, and the one-way valve 4 is located inside the mask 1 end, the first Molecular sieve 5 (preferably molecular sieve is three-layer molecular sieve) is installed inside the gas pipeline, the first gas pipeline is communicated with the second gas pipeline, and its connection is sealed by the spiral fixed turn 6, and the second gas pipeline and the The exhalation collection device is connected, and the joint is sealed by the helical fixed turn 6 .
[0022] The above-mentioned technical scheme connec...
Embodiment 2
[0029] Example 2: The working principle of the breath ammonia and methyl mercaptan detector: the wavelength-modulated laser passes through the photoacoustic cell, and the gas to be measured absorbs the light energy to generate a pulse pressure wave, that is, an acoustic signal, which is then detected by the silicon MEMS cantilever beam optical microscope. The sounder detects small changes in sound pressure, and finally detects the ppb level gas of exhaled ammonia and methyl mercaptan in patients with liver diseases.
[0030] This embodiment provides a kind of photoacoustic detection system of ammonia and methyl mercaptan, mainly by respiratory mask 1, ammonia and methyl mercaptan double light source 8 stable controllers, photoacoustic sensor, photoacoustic signal detection microphone, photoacoustic signal It consists of a processing system, a spectrum analyzer, a display, a micro-printer, a patient information input system, and a USB interface. The gas to be detected enters th...
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