| 摘要 |
PROBLEM TO BE SOLVED: To surely confirm a truth or a falsehood of a type of a gas to be used without a large burden of a human fatigue of confirming a gas outlet of a wall surface or a color of a gas cylinder double or triple. SOLUTION: A medial gas passing through an inner gas passage 29 in a medical gas flowmeter for measuring a flow rate of the gas supplied from a gas supply source 3 to a patient is heated by a heater 51. Then, a physical property value inherent in the medical gas passing through the passage 29 is calculated by a physical property value calculating means 39A based on a voltage in response to a temperature of the gas present at a temperature sensor X disposed at a position in the passage separate from the heater 51 in a direction perpendicular to a flowing direction of the gas in the passage 29. Then, in the case of judging whether the type of the gas to be supplied to the patient designated by a gas type designating means Y is not coincident with the value of the gas by a gas type coincidence judging means 39B, a judged result of the means 39B is output from a judged result output means Z.
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