Hb question

[BombayBombshell]

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ummmm a random question i picked up somewhere....

an adult's Hb is 98% sat. w/ O2 but arterial O2 is decr. the most likely reason is:
a. anemia
b. a-v shunt
c. hi alt. hypoxia
d. pulm diffusion defect
e. hemoglobinopathy

thanks
~brin

 

[Mossjoh]

ummmm a random question i picked up somewhere....

an adult's Hb is 98% sat. w/ O2 but arterial O2 is decr. the most likely reason is:
a. anemia
b. a-v shunt
c. hi alt. hypoxia
d. pulm diffusion defect
e. hemoglobinopathy

thanks
~brin

Well, if the hemoglobin that is present is saturated, but the O2 CONTENT is DECREASED...there is an overall decrease in hemoglobin levels, caused by ANEMIA! (A)

In anemia, saturation is still normal, while Hb levels are low

Mossjoh

 

[Idiopathic]

Yes, also good to know that anemia never causes cyanosis, as this is only due to %sat. This sort of helps on this question.