Table 2 Physiological measurements, according to diaphragm thickening during spontaneous breathing trial (SBT) with the settings used during the ultrasound assessment (pressure support and positive end-expiratory pressure set at 0 cmH2O)
From: Diaphragm thickening in cardiac surgery: a perioperative prospective ultrasound study
Variables | All (n = 100) | Low diaphragm thickening during SBT (n = 75) | No low diaphragm thickening during SBT (n = 25) | P value |
|---|---|---|---|---|
Physiological data | ||||
TV (ml) | 426 (120) | 439 (125) | 395 (99) | 0.1 |
RR (cycles/min) | 24 [20–27] | 23 [20–28] | 22 [20–26] | 0.6 |
RR/TV | 62 (29) | 61(28) | 63 (27) | 0.5 |
SpO2 (%) | 100 [98–100] | 100 [98–100] | 100 [98–100] | 0.3 |
Mean arterial pressure (mmHg) | 75 (18) | 75 (16) | 78 (14) | 0.9 |
Heart rate (bpm) | 78 (14) | 80 (12) | 75 (18) | 0.2 |
PaO2/FiO2 | 303 (75) | 302 (66) | 341 (89) | 0.02 |
PaCO2 (mmHg) | 37 (6) | 38 (6) | 36 (5) | 0.1 |