THE IMPORTANCE of high humidification in the treatment of tracheobronchial inflammation has been well attested.1 However, although a number of devices have been produced for the purpose of therapeutic humidification, there still exists a need for an efficient, practical unit that will develop an effective vapor content with high concentration of oxygen and controlled temperature.
The croup kettle and other units developing true hot steam, such as the Colson Safety Inhalator,2 frequently lead to marked elevation of patients' temperatures if used within a small enclosed space. Various humidifiers have been developed which produce a cold water spray. Among these are the Walton Oxygen Tent Humidifier3 and that reported by Rathbun and Shuman.4 Although these eliminate the dangers associated with hot steam, they in turn also prove unsatisfactory, because of the large amount of moisture deposited on patients, bedding and attendants. Such widespread deposition of water occurs