Accumulation of carbon dioxide in oxygen hoods, infant cots, and incubators.

The concentration of carbon dioxide in the air of oxygen hoods, infant cots, and incubators was found to be as high as 1% v/v (30 times the "fresh air" level of about 320 microliter/liter). The physiological and clinical implications of the consequent long-term exposure of infants to atmospheres of such composition are discussed.