an
Forum Guru
Topics: 19
Posts: 437
|
patient A has CO poisoning and patient B has iron deficiency anemia. Assume that CO is binding 50% of the available O2 binding sites on the hemoglobin, and that the anemic patient has 50% of the normal amount of Hb. Patient A is more at risk of tissue hypoxia becoz CO causes
a)arterial hypoxemia, while anemia does not
b)a decrease in diffusing capacity
c)a decrease in P50 of Hb for O2
d)a greater decrease in the concentration of arterial O2
e)a reduced rate of O2 binding to available Hb
___________________
I don't believe in miracles...I rely on them. And sometimes, I create my own.
|
| guangyu
Forum Elite
Topics: 29
Posts: 308
|
The last one
|
| p53
Forum Guru
Topics: 51
Posts: 804
|
correct answer is c.
CO increases Hb's affinity for O2.
___________________
"Everything should be made as simple as possible, but not simpler." - Albert Einstein
|
| an
Forum Guru
Topics: 19
Posts: 437
|
correct, p53
___________________
I don't believe in miracles...I rely on them. And sometimes, I create my own.
|
| mildus
Forum Guru
Topics: 19
Posts: 614
|
I suppose that you wanted to say "decreases" instead of "increases"
|
| drkpp
Forum Guru
Topics: 45
Posts: 882
|
no mildus its increased affinity so o2 not released to the tissues. thus hypoxia
___________________
"Where there is a will there is a way!"
-Anonymous
|
| ssrpk
Forum Fanatic
Topics: 154
Posts: 2,819
|
yeah increase binding affinity results in left shift of oxy-hemoglobin curve , thus reduced p50!
___________________
life is guud
|
| mildus
Forum Guru
Topics: 19
Posts: 614
|
thanks very much guys!
|
|
| |
| | | | | | | | |
