Cleveland Clinic journal of medicine
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When interpreting pulmonary function tests, one should first try to determine the pattern of abnormality: is it obstructive, restrictive, or normal? Pulmonary function tests cannot by themselves distinguish among the potential causes of abnormalities, and must be interpreted in light of the patient's history, physical examination, and ancillary studies. Once a pattern is recognized, the diagnosis will often follow.
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Severe acute respiratory syndrome (SARS) is probably here to stay, and every health care institution should take precautions against an outbreak. The signs and symptoms of SARS are nonspecific, and there is no early diagnostic test, no specific treatment, and no vaccine. In some parts of the world, including Canada, more than 80% of probable cases were nosocomial.