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Old 08-13-2011
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Default oxygen saturation

a 76yr old woman undergoes hip replacement surgery she loses 700ml blood during surgery pulse oximeter shows reading of 95% on 2L O2 stat Hb level obtained is 8.5gm%.her oxygenation can be optimized by

A.giving 2 units of packed red blodd cells

B.giving morphine for pain relief

C.giving 500ml of ringer lactate solution

D giving oxygen at 4L thru oxygen mask
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Old 08-13-2011
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C.giving 500ml of ringer lactate solution
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Old 08-13-2011
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d) oxygen 4 l. it is about half of minute volume (16 x 500)
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Old 08-13-2011
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D. giving oxygen b/c morphin and ringer lactat don't solve anything, and it's just easier to give oxygen than to give her units of red blood cells (there is always the risk of infection w/ administering blood products ...)
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Old 08-13-2011
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giving oxygen also increases the saturation way faster
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Old 08-13-2011
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A.give 2uPRBC ,HH 8.5
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Old 08-13-2011
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A . 2 units Packed RBCs
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Old 08-14-2011
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ok... i wud like to c more response
came across this question while going thru a simulation test on gunnertraining
there the ans ws given blood transfusion but here i disagree
the reason:
the pulse oximeter shows O2 saturation n when a person hs low Hb the O2 content is reduced but O2 saturation n PaO2 remnains unchanged so the pulse oxmeter is actually showing a drop in saturation tht i think can be corrected by O2 supply
wud like a view on dat.....
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Old 08-14-2011
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If on 2L sat is 95% ,yes we can titrate O2 & place on vm .pt still need PRBC.
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