DrVirgo
Forum Hero
Topics: 1096
Posts: 3,515
|
36. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
An adult's hemoglobin is 98% saturated with oxygen, but arterial oxygen content is decreased. The most likely cause of this condition is
A
)
anemia
B
)
an arteriovenous shunt
C
)
hemoglobinopathy
D
)
high-altitude hypoxia
E
)
pulmonary diffusion defect
___________________
Our greatest glory is not in never falling, but in rising every time we fall.
|
| robin082006
Forum Hero
Topics: 471
Posts: 5,123
|
A?
___________________
The Key to Succeed is Patience.
|
| sridevibandaru24
Forum Guru
Topics: 33
Posts: 434
|
A
|
| goodgod
Forum Senior
Topics: 3
Posts: 80
|
I too think its A
___________________
The important thing is this: To be able at any moment to sacrifice what we are for what we could become.
|
| DrVirgo
Forum Hero
Topics: 1096
Posts: 3,515
|
Thanks. Why A and not B?
___________________
Our greatest glory is not in never falling, but in rising every time we fall.
|
| robin082006
Forum Hero
Topics: 471
Posts: 5,123
|
The 4 remainders are associated with decrease in Hb saturation.
___________________
The Key to Succeed is Patience.
|
| DrVirgo
Forum Hero
Topics: 1096
Posts: 3,515
|
what is the PaO2, SaO2, Hemoglobin, and O2 content in all the other remaining choices? I think this is a good practice question to discuss.
Thanks everyone! 
___________________
Our greatest glory is not in never falling, but in rising every time we fall.
|
| jeyasudhahar
Forum Junior
Topics: 21
Posts: 47
|
O2 content = (1.34Hb) (SaO2+PaO2)
SaO2= CO poisoning,methemoglobin poisoning,factors affecting O2 dissociation curve
|
| Cedrick
Forum Fanatic
Topics: 322
Posts: 2,042
|
Anemia
|
| Diego Casali
Forum Elite
Topics: 7
Posts: 235
|
In anemia, pO2 and SaO2 are normal!
There is only a decrease in hemoglobin!
So, anemia can't be the cause of a low pO2 with a normal hemoglobin and a normal O2 saturation.
I think D is the correct answer.
In high altitude hypoxia, you will have a normal Hb level, a normal Hb saturation (right shift) and a low pO2 (hypoxemia, because of low pAO2 => low paO2).
|
| twesting2173
Forum Senior
Topics: 7
Posts: 65
|
diego is totally right!
|
| twesting2173
Forum Senior
Topics: 7
Posts: 65
|
no, no, i take it back diago is wrong. it's anemia.
it is true that the saturation and partil pressure stay the same, but the TOTAL decreases. o2 cntent decreases b/c we are producing less Hb in an anemia.
i think this is a very high yield topic.
|
|
| |
| | | | | | | | | | | | |
