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USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam |
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#1
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can anybody tell me the effect of high altitude on arterial oxygen saturation??? it must be normal right?
in kaplan qbank they say that the saturation is decreased....can anybody explain this clearly? i dint fing google of much help...thnx ![]() |
#2
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When Partial pressure of O2 falls which way the saturation is supposed to go ?
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Everything is possible for him who believes (MARK 9:23) 245/247/passed on 1st attempt/223/2mos Obsie /3 US LORS/visa not needed/2008 grad |
#3
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saturation is all about how many oxygen molecules bind to a heamoglobin ryt???? the haemoglobin as such is normal in structure!!
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#4
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![]() Quote:
but lack of O2 which is represented decreased PO2 causes hemoglobin to be less saturated whatever decreases PO2 decreases O2sat but not visa versa
__________________
Everything is possible for him who believes (MARK 9:23) 245/247/passed on 1st attempt/223/2mos Obsie /3 US LORS/visa not needed/2008 grad |
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smita (07-09-2015) |
#5
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thnk u for making it crystal clear
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#6
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U just remember this
FiO2-----> PAO2 -----> PaO2 ------> Sao2 It works only in one direction. And each one is depend on its previous one. If previous one decreases its going to decrease the next one. At high altitude FiO2 (PiO2) is decreased and so all of next ones. FiO2 - Fraction/ Percentage of inspired O2 PAO2 - Alveolar O2 concentration PaO2 - plasma concentration SaO2 - Hb saturation. If anything i have explain is incorrect , plz explain it Thanks |
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smita (07-13-2015) |
#7
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that one is going to my fa!!! thnk u |
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