Canadian Respiratory Journal / 2017 / Article / Tab 2

Research Article

Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit

Table 2

Y-piece gas conditions with three humidifier settings.

Identification 37-default setting 33.5-theoretical setting 33.5-adjusted setting
Chamber outlet temperature Y-piece temperature Y-piece humidity (mg/L)Chamber outlet temperature Y-piece temperature Y-piece humidity (mg/L)Chamber outlet temperature Y-piece temperature Y-piece humidity (mg/L)
PatientStudySetActualSetActualSetActualSetActualSetActualSetActual

113736.94039.925.133.533.636.537.018.640.540.538.538.635.6
237.040.019.033.536.45.740.039.438.038.036.4
2137.737.146.333.136.333.237.036.337.036.440.2
3137.039.928.933.436.620.637.036.536.537.136.2
236.737.834.334.037.025.936.535.336.537.136.4
4137.039.228.833.935.717.640.039.938.037.836.8
5137.139.929.933.036.519.239.039.238.038.036.9
6137.239.138.033.535.931.936.035.938.038.036.7
237.239.138.033.536.031.935.035.037.036.835.0

Mean37.039.132.033.536.422.737.937.937.537.536.9
95% CILower36.938.526.833.336.116.936.636.237.037.135.5
Upper37.239.837.333.736.728.639.239.038.038.038.3

Three humidifier settings, 37-default (current clinical recommendation; chamber-outlet, 37°C; Y-piece, 40°C), 33.5-theoretical (theoretically adjusted setting for body temperature 33.5°C; chamber-outlet, 33.5°C; Y-piece, 36.5°C), and 33.5-adjusted (optimised setting to achieve saturated vapour at 33.5°C, or 36.6 mg/L, using feedback from a thermohygrometer), were tested. CI: confidence interval. Set: temperature setting for the humidifier. Actual: actual observations of the temperature value.