A clinical scoring system has been developed to detect impending or existing respiratory failure in childhood status asthmaticus. The score is based on a numerical evaluation of oxygenation, gas exchange, work of breathing, airway obstruction, and cerebral function. A highly significant correlation exists between the score and arterial carbon dioxide tension (Pco 2 ). The score and arterial oxygen tension (Po 2 ) during air breathing also appear to be significantly related.
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David W. Wood (1972) studied this question.