DAVID A. NARDONE, M.D.; THOMAS G. KELSEY, M.D.
NARDONE DA, KELSEY TG. Occult Carbon Monoxide Poisoning. Ann Intern Med. 1988;108:150-151. doi: 10.7326/0003-4819-108-1-150
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Published: Ann Intern Med. 1988;108(1):150-151.
To the editor: The article by Heckering and colleagues (1) contains a potentially useful message. Patients with either headache or dizziness, who lack a history of gas stove usage and affected cohabitants, have a probability of carbon monoxide poisoning (4 in 89 patients, 4.5%) in which observation without performance of a carboxyhemoglobin level is indicated. Alternatively, the pretest probability for patients with headache or dizziness, with a history of either gas stove usage or affected cohabitants, is 9.5% (4 in 42 patients). For this latter group carboxyhemoglobin testing is indicated. Thus, the no-test:test threshold for carboxyhemoglobin poisoning is a probability
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