A 54-year-old man sustains third degree burns in a house fire. His respiratory rate is 30/min, Hb = 17 g/dL, arterial PO2 is 95 mm Hg, and arterial O2 saturation is 50%. The most likely cause of his low oxygen saturation is:
Correct Answer: Carbon monoxide poisoning
Description: Ans. B. Carbon monoxide poisoningCarbon monoxide will lower oxygen content and saturation, but the arterial PO2 is unchanged. Airway obstruction or pulmonary edema will lower O2 saturation and arterial PO2 .
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now