Dynamics of end expiratory lung volume after changing positive end-expiratory pressure in acute respiratory distress syndrome patients

Table 2 ΔEELV, V_EXP, V_AD, and V_AD/ΔEELV ratios for each PEEP step when PEEP was increased and decreased

PEEP steps (s)	ΔEELV (ml)	V_EXP (ml)	V_ADI (ml)	V_ADI/ΔEELV (%)
Increase in PEEP
5–10	309±124	193±70	116±81	34±18
10–15	340±134	196±63	144±108	37±20
15–20	328±178	181±55	147±140	35±23
20–25	297±138	174±44	123±117	36±17
25–30	290±148	142±37	154±140	45±23
30–35	211±93	129±34	82±76	33±19
35–40	203±102	111±27	89±98	34±43
Mean±SD	282±54	161±33	122±28	36±4
Decrease in PEEP
40–35	182±133	104±31	78±114	30±22
35–30	200±111	120±31	80±99	33±18
30–25	218±72	142±41	76±45	33±12
25–20	341±120	169±55	172±119	46±18
20–15	384±174	203±56	181±140	43±12
15- 10	363±111	232±61	131±71	35±12
10–5	384±177	226±78	158±122	35±19
Mean±SD	296±92	171±51	125±47	36±6

Abbreviations: EELV end-expiratory lung volume, PEEP positive end-expiratory pressure, V_ADI additional increased volume, V_EXP expected volume
Numbers are the mean±SD of all patients

ISSN: 1364-8535