The acute effects of body position strategies and respiratory therapy in paralyzed patients with acute lung injury

Table 2 Mean values for cardiorespiratory variables during the four 6-h periods studied

		Manual turning +		Continuous rotation +
Cardiorespiratory variable	Manual turning	P&PD	Continuous rotation	P&PD
Mean VO₂ (ml/min)	299 ± 88	323 ± 114	288 ± 79	302 ± 97
Mean VCO₂ (ml/min)	269 ± 71	294 ± 69	260 ± 73	272 ± 77
Mean PIP (cmH₂O)	38 ± 9	40 ± 9	36 ± 10	38 ± 8
Mean P_plat (cmH₂O)	34 ± 7	37 ± 6	33 ± 6	34 ± 6
Mean V_t (ml)	733 ± 104	710 ± 119	751 ± 96	745 ± 113
V_d/V_t (%)	0.62 ± 0.18	0.63 ± 0.23	0.59 ± 0.18	0.64 ± 0.19
Cardiac output (litres/min)	7.4 ± 2.3	7.8 ± 2.7	7.1 ± 2.2	7.4 ± 2.7
Turns per 6 h	2.5 ± 0.4	3.0 ± 0.2	41 ± 8^*	43 ± 20^*

Values are means ± SD of data recorded every hour for the study period, except V_d/V_t, which was every 3 h. PIP, peak inspiratory pressure; P&PD, percussion and postural drainage; P_plat, inspiratory plateau pressure; VO₂, oxygen consumption; VCO₂, CO₂ production.

ISSN: 1364-8535