Diagnostic accuracy of the peripheral venous pressure variation induced by an alveolar recruitment maneuver to predict fluid responsiveness during high-risk abdominal surgery

Table 2 Hemodynamic Variables at Baseline, during Alveolar Recruitment Maneuver, before Volume Expansion, and after Volume Expansion in Responders (n = 32) and Non-responders (n = 28)

	T1 Before ARM	T2 During ARM	P1 value	T3 Before VE	T4 After VE	P2 value
PVP (mmHg)
Responders	8 (6–12)	14 (12–18)	< 0.0001	9 ± 4	10 ± 4	0.0021
Non-responders	11 ± 5	15 ± 5	< 0.0001	11 (10–13)	11 (10–14)	0.7819
CVP (mmHg)
Responders	8 (5–10)	13 (11–16)	< 0.0001	8 ± 3	9 ± 3	0.0026
Non-responders	9 ± 3	13 ± 4	< 0.0001	9 (6–12)	10 (9–12)	0.1650
MAP (mmHg)
Responders	84 ± 11	78 ± 13	0.0001	85 ± 12	88 ± 16	0.3538
Non-responders	83 ± 9	81 ± 10	0.2192	83 ± 9	81 ± 10	0.2192
Pulse Pressure
Responders	61 ± 14	48 ± 15	< 0.0001	61 ± 17	68 ± 15	0.0087
Non-responders	71 (52–81)	64 (48–74)	0.0004	65 ± 17	63 ± 17	0.3027
PPV (%)
Responders	8 (6–11)	NA		9 (7–12)	6 (4–8)	0.0001
Non-responders	6 (4–8)	NA		6 (4–9)	5 (4–9)	0.2301
SVI (ml/min/m²)
Responders	35 (31–41)	31 (25–38)	0.0001	32 (30–41)	38 (36–47)	< 0.0001
Non-responders	45 (37–48)	42 (35–45)	0.0001	44 (36–47)	45 (37–50)	0.0097

Notes:
Due to a short 30 s ARM period and a long averaging SVI values (20 s) from the pulse contour analysis, values of SVI during T2 should be interpreted with caution
Dispersion of the values is expressed in standard deviation (±) or in interquartile range (brackets)
Legends: ARM = Alveolar recruitment maneuver; NA: not applicable; P1 = comparison between T1 and T2; P2 = comparison between T3 and T4;
PPV = pulse pressure variations; pulse pressure = SAP-DAP; SVI: stroke volume index
T1 = baseline, before LRM; T2 = during LRM; T3 = baseline 2, before volume expansion; T4 = after 4 ml/kg crystalloid infusion; VE = volume expansion

ISSN: 1471-2253