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Physiology II
Respiratory Physiology and Pathophysiology
Analysis of Hypoxemia Cases

Students are encouraged to review the cases provided with the handouts, fill in the spaces in the chart below with data provided in the case or with values calculated from the data provided, and then use the flow chart provided to determine the pathophysiological mechanism(s) contributing to arterial hypoxemia in each case. 

Cases

FIO2

PAO2

PaO2

PaCO2

A-a O2
difference

FIO2
helpful?

 Resp. Case A
a 76-year-old woman with dyspnea

21% 63 60 69 3 No

Resp. Case B
a 63-year-old woman with dyspnea
and severe chest pain over the left side

30% 181.4 64 26 118 No

 Resp. Case C
a 49-year-old man with breathlessness
during even moderate activity

21% 75 44 60 31 --
100% 626 290 70 336 Yes

 Resp. Case D
a 21-year-old high-altitude native
(sampled on mountain)

84 mmHg
@ pressure 446 mmHg
50 48 27 2 Yes

 Resp. Case E
a 59-year-old man with shortness of breath

21% 70 42 64 28 --
30% 101 56 90 45 No


Sorry For the bad scan...It is a scan of a scan...You should get the idea though.


Last Updated 04/10/00 12:27:10 PM
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