ABSTRACT
Objective To investigate the relationship among the oxygen flow or the amount of wetting liquid in humidification bottle and oxygen noise.Method Distilled water were added to one third or half of two sets of oxygen humidification bottle device as the humidification fluid,the noise value generated in the flow rate of 2 L/min,5L/min by two set of inspired oxygen apparatus were recorded.Results Different noise value with same capacity humidifying fluid but different oxygen flow was statistically significant(all P<0.01),the more flow of oxygen the greater the noise; Different noise value generated by the same oxygen flow but different capacity humidifying liquid oxygen was statistically significant(all P<0.01),more humidification fluid,greater the noise. Conclusion Noise generated with the increasing oxygen flow rate and the amount of wetting liquid.