The gas system of medical blood gas analyzer

Natural blood gas analyzer, with outside air provides gas. External air by an air compressor and carbon dioxide gas cylinders, compressor provide 406 ~ 608 kPa (4 ~ 6 atmospheric pressure) dry compressed air. In the gas mixer, compressed air and carbon dioxide gas mixture evenly. The cows in the right proportion gas calibration, the mixed gas also used to CST liquid bottle of pressure, make the potassium chloride solution inflows to CST electrode, and maintain certain osmotic pressure.

The pipe nozzle in potassium chloride parts have a small firm, used to release the system of high pressure. Mixer send out different proportions of gas, for PO2 and PCO2 electrode calibration, gas input line in a pressure sensor. Checking monitoring gas pressure, make its ensure constant. Mixer exit sets up 2 pressure sensor, carbon dioxide and the entrance of the compressed air with a pressure sensor. All kinds of gas pressure if under or higher than demand, blood gas analyzer medical equipment alarm, and stop working until pressure fit. Mixed gas 1 (contains 19.8% oxygen, carbon dioxide 5.5%) go into a wet process, implement in wet; The moist with 37 ℃ in the water, and when the pressure is high dry gas by the bottom of the injected water, become a little bubble from the pimple on, gas becomes saturated a wet process, wet gas, inflows to measure in a room for gas calibration power supply. Gas is to pass to moist, is to protect the electrode, improve electrode conversion effect and prolong the service life. Use the program can moist pot to with distilled water. When filled two electromagnetic valve is opened, in vacuum pump suction, wash the bottle of water through the valve into the moist. When the water into the wet process, more than a certain height, it is through the top of the waste liquid bottle.

Gas mixture in 2 (including 9% ~ 11% of the carbon dioxide) by the bottom of the gas mixer is sent, the air valve, heating tube sent to converter, and in just 2 points in PCO2 electrode calibration, the converter on the outlet to the measurement room, usually 6-12 h flesh analyzer set a standard. Gas heating tube through the promotion to 37 ℃ temperature, heating tube is a root the 2 V voltage heating silk plastic pipe. With gas calibration, the process for: gas 1 or 2-heating tube--converter injector position 6-- measuring chamber-peristaltic pump a waste liquid bottles. At this time, there were mixed gas in the measurement PCO2 and PO2 electrode continue to monitor.

Article : From Perlong medical (http://www.pl999.net/)
Attention:If you want to copy, please attach the website.