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Primary Viva 1 (Physics)

Created: 7/9/2004

1. Pulse oximetry

– How does it work?

– Is it fast or slow as a monitor of oxygen saturation?

– What problems are associated with it?

2. You are now shown a graph of light absorption of haemoglobin and oxyhaemoglobin.

– Please comment on this graph, mentioning all the salient features.

You may like to read more about pulse oximetry by clicking here.

3. Humidity

– Define relative and absolute humidity.

– What is an appropriate level of humidity for the operating theatre and why?

– How does saturated vapour pressure (SVP) change with altitude and temperature?

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