Compare and contrast non-invasive oscillometric and invasive arterial blood pressure monitoring.
There were some good answers, though invasive BP measurement was better answered than oscillometry. Many candidates provided extensive detail in one area i.e. the workings of a Wheatstone bridge, to the detriment of a balanced answer. Few seemed to have a structure consisting of "equipment, method, sources of error, advantages, disadvantages" or similar and missed providing important information as a result. Several described auscultatory non-invasive blood pressure measurement, rather than oscillometry, which although related in principle is a different process
As it appears that the CICM examiners wanted their answer in the format of "equipment, method, sources of error, advantages, disadvantages", that is the structure I chose for this table:
Domain | Invasive (arterial catheter) | Oscillometric cuff measurement |
Equipment |
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Physical principles and method |
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Practical advantages |
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Practical disadvantages |
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Sources of error |
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