Influence of elevated abdominal pressure (EAP) on lung mechanics and gas exchange during PCV with and without spontaneous breathing

Table 1

	PIP	VE	RR	WOBtot	Cdyn	PaO₂	PaCO₂	DO₂	VO₂	Shunt	Deadspace
PCV
Pabd = 0	22 ± 2^†	7.8 ± 0.8^†	27 ± 3*	48.8 ± 8.5^†	29.1 ± 4^†*	136 ± 21^†	35 ± 6^†*	461 ± 182	187 ± 43	4.2 ± 5.2	43.2 ± 17.6
Pabd = 30	43 ± 5*	7.1 ± 0.9	29 ± 2*	91.0 ± 14.5	9.5 ± 0.9*	108 ± 24	49 ± 10*	508 ± 129*	193 ± 58	10.9 ± 11.3	46.4 ± 7.8
BIPAP
Pabd = 0	20 ± 3^†	7.7 ± 0.6^†	37 ± 15^†	49.8 ± 15.4	34.2 ± 7.7^†	135 ± 26^†	39 ± 5^†	505 ± 170	162 ± 34^†	5.9 ± 7.2	51.2 ± 11.3
Pabd = 30	39 ± 5	7.1 ± 0.6	56 ± 11	98.9 ± 22.9	11.2 ± 2.2	105 ± 31	61 ± 20	622 ± 212	205 ± 42	8.4 ± 7.0	51.2 ± 9.1

*P < 0.001 for PCV vs BIPAP. ^†P < 0.01 for PABD = 0 vs 30. Cdyn, dynamic compliance; DO₂, oxygen delivery; Pabd, abdominal pressure; PIP, peak inspiratory pressure; RR, respiratory rate; VE, expiratory minute ventilation; VO₂, oxygen consumption; WOBtot, total work of breathing.

ISSN: 1364-8535