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Evaluation of Hypoventilation
Seminars in Respiratory and Critical Care Medicine, 05/22/09
Berry RB et al. - The severity of daytime hypoventilation or pulmonary function impairment often does not accurately predict the severity of nocturnal changes in arterial oxygen saturation and the degree of nocturnal hypoventilation. End-tidal PCO2 and transcutaneous PCO2 are sometimes utilized to directly estimate the degree of nocturnal hypoventilation during sleep studies. They have limitations but may be especially useful to detect trends in the PCO2 during the night.
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