A Patient Has a P₅₀ Value of 29 Mm Hg

question 41

Multiple Choice

A patient has a P₅₀ value of 29 mm Hg. What does this indicate?

• A)decreased affinity of Hb for oxygen
• B)higher than normal Hb saturation for a given PO₂
• C)increased affinity of Hb for oxygen
• D)normal position in the HbO₂

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Definitions:

Saturation

In color theory, saturation refers to the intensity of a color, how pure it is in comparison to gray. In a broader sense, it can also refer to the point at which a thing is unable to absorb or dissolve any more of something.

Colorfulness

The degree to which a visual stimulus is perceived as vivid or saturated, as opposed to dull or washed out.

Wavelength

The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

Pupil

The opening in the center of the iris of the eye that allows light to enter the retina.