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Oxygen are used for medical with many purpose. Not only to keep the base vital conditions of patient but also on various therapy. So Ministry of Health and Welfare let oxygen to be the medicine in law and named medical oxygen. The medical quality of medical oxygen except its own purity, percentage of moisture, etc. Including supply system are important at the same. But there were a few papers wrote about medical oxygen supply system. Especially in equipment maintanace and risk appraisal accordance with medical oxygen reliability analysis. The paper used three methods to analyze the reliability of medical oxygen. (1) Failure Modes and Effects Analysis (FMEA), (2) Fault Tree Analysis (FTA), (3) Mean Time Between Failures (MTBF). Most hospitals select spare system or double loops system to prevent when medical oxygen failure. If they through this paper can find scientific analysis methods to make up a deficiency of hardware spare system. And that are advantages for medical oxygen supply.
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