Mr. C is a 60-year-old male who lives in his 1994 Toyota Corolla. He earns money by collectingaluminum cans along the roadside and from trash dumpsters. He states that he has been coughing up about ¼ cup of white sputum each morning for the past 20 years. About 1 week ago, he noticed a sudden onset of shaking chills, fever, sweating, malaise, chest pain, and shortness of breath at rest. He also began coughing up rust-colored sputum that was thicker than his normal sputum production. Mt. C admits to current consumption of two packs per day of cigarettes (ie 70 pack-year smoking history). He admits to occasional alcohol use but denies having orthopnea, ankle edema, nausea, vomiting, diarrhea, weight loss, dysuria, wheezing, or hemoptysis. Lab results on room air: ABG pH 7.47 PaCO2 32 mmHg PaO2 44 mmHg HCO3 23 mEq/l SaO2 75% BE -2 Hb 12 g/dl PB 760 mmHg ETCO2 10 mmHg Part 1: Interpret the ABG Part 2: Calculate Mr. C’s PaO2 and A-a gradient
Case #3
Mr. C is a 60-year-old male who lives in his 1994 Toyota Corolla. He earns money by collectingaluminum cans along the roadside and from trash dumpsters. He states that he has been coughing up about ¼ cup of white sputum each morning for the past 20 years. About 1 week ago, he noticed a sudden onset of shaking chills, fever, sweating, malaise, chest pain, and shortness of breath at rest. He also began
coughing up rust-colored sputum that was thicker than his normal sputum production. Mt. C admits to current consumption of two packs per day of cigarettes (ie 70 pack-year smoking history). He admits to occasional alcohol use but denies having orthopnea, ankle edema, nausea, vomiting, diarrhea, weight loss,
dysuria, wheezing, or hemoptysis.
Lab results on room air:
ABG
pH 7.47
PaCO2 32 mmHg
PaO2 44 mmHg
HCO3 23 mEq/l
SaO2 75%
BE -2
Hb 12 g/dl
PB 760 mmHg
ETCO2 10 mmHg
Part 1: Interpret the ABG
Part 2: Calculate Mr. C’s PaO2 and A-a gradient
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