Question

According to a normal oxygen dissociation curve haemoglobin is nearly 97 per cent saturated at

A PO2 30mm Hg


B PO2 100mm Hg


C PO2 60mm Hg


D PO2 40mm Hg

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Answer 1

Answer:

B PO2 100mm Hg.......m

Explanation:

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Answer 2

Answer:

b)

Explanation:

In clinical practice, the level of arterial oxygenation can be measured either directly by blood gas sampling to measure partial pressure (PaO2) and percentage saturation (SaO2) or indirectly by pulse oximetry (SpO2).

This review addresses the strengths and weaknesses of each of these tests and gives advice on their clinical use.

The haemoglobin–oxygen dissociation curve describing the relationship between oxygen partial pressure and saturation can be modelled mathematically and routinely obtained clinical data support the accuracy of a historical equation used to describe this relationship.