Sun28November0628PM 8

Are the following true or false of oxygen measurement?

True / False

The fuel cell is suitable for breath-to-breath analysis Correct

Oxygen is diamagnetic Correct

Polarographic (Clark) electrode consists of a platinum cathode and silver anode Correct

The galvanic fuel cell consists of a gold cathode and a silver anode Incorrect answer selected

Mass spectrometry is suitable for oxygen analysis Correct

Explanation

Oxygen is paramagnetic and is attracted to a magnetic field.

The Clark electrode consists of a platinum cathode and silver anode; the galvanic fuel cell consists of a gold cathode and a lead anode. Both have a slow response time and are not suitable for breath-to-breath analysis.

Mass spectrometry can be used for measuring different gases and inhalational anaesthetic vapours but is expensive and impractical for clinical use.

Reference:

Al-Shaikh B, Stacey S. Essentials of Anaesthetic Equipment. 3rd ed. London: Churchill Livingstone; 2008.

Davis PD, Kenny GNC. Basic Physics and Measurement in Anaesthesia. 5th ed. Edinburgh: Butterworth Heinemann; 2009.

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Average score: 63.17%

Times answered: 227