Significant differences in inspired gas humidity were found with the humidification chambers tested. The position of the ATP and the set temperature had a significant impact on the absolute humidity of the inspired gas. In general, higher inspired gas humidities were obtained with the ATP outside the humidicrib. However, condensation of water close to the ETT appeared at low humidicrib temperatures (< 36.2 degrees C) with the ATP outside the humidicrib and extreme care should be taken that particulate water does not enter the lungs under these conditions.
With the ATP placed outside the humidicrib and with variations of humidicrib temperature, infants are likely to have inspired gas temperatures that are significantly different to the desired temperature. Certain ATP adaptors cause these variations in inspired gas temperature to be more pronounced. Extreme care must be used to avoid suboptimal inspired gas temperatures with these environmental variations and the ATP positioned outside the humidicrib.
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