Research Article
A New Method for In Vivo Analysis of the Performances of a Heat and Moisture Exchanger (HME) in Mechanically Ventilated Patients
Table 2
Temperature (T) and absolute humidity (AH) values of Heat and Moisture Exchanger (HME) performance indicators; SD: standard deviation.
| HME performance indicators | t0: mean | t1: mean | t2: mean | Differences over time (p) | (SD) | (SD) | (SD) |
| LOAD | T (°C) | 33.6 | 33.4 | 33.3 | 0.51 | (1.38) | (1.49) | (1.18) | AH (mg/l) | 36.9 | 36.4 | 36.2 | 0.18 | (2.66) | (2.83) | (2.26) |
| RETURN (efficacy) | T (°C) | 31.5 | 31.1 | 31.0 | 0.67 | (1.54) | (1.34) | (1.29) | AH (mg/l) | 32.3 | 31.7 | 31.4 | 0.11 | (2.60) | (2.26) | (2.27) |
| YIELD (efficiency) | Thermal differential (°C) | 2.2 | 2.2 | 2.3 | 0.81 | (0.55) | (0.54) | (0.76) | AH yield | 0.89 | 0.89 | 0.89 | 0.24 | (0.03) | (0.03) | (0.04) |
| INPUT | T (°C) | 25.9 | 25.2 | 25.5 | 0.80 | (0.76) | (0.71) | (0.88) | AH (mg/l) | 1.2 | 1.3 | 1.2 | 0.11 | (0.70) | (0.52) | (0.56) |
| LOSS | T (°C) | 26.0 | 25.3 | 25.5 | 0.59 | (0.76) | (0.72) | (0.89) | AH (mg/l) | 6.3 | 6.9 | 6.6 | 0.62 | (1.36) | (1.94) | (2.57) |
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