Humidification in viral croup: a controlled trial

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Abstract
Sixteen children (mean age 1.9 yr) admitted to hospital with viral croup were assigned randomly to either a high humidity atmosphere or room air. No other treatment was given. During the initial 12 h both groups showed a similar rate of recovery as measured by pulse rate, respiration rate, transcutaneous oxygen (TcO2), transcutaneous carbon dioxide (TcCO2) and a clinical rating. No therapeutic benefit was demonstrated from the provision of a high humidity atmosphere. The widespread use of humidification in the management of croup requires reappraisal.

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