Prediction of preload dependency using phenylephrine-induced peripheral perfusion index during general anaesthesia: a prospective observational study

Table 4 Ability to predict preload dependency

Index	Area under the ROC curve	95% confidence interval	Cut-off value	Sensitivity	Specificity	Youden index
PI at PIH	0.706	0.545–0.867	6.2	0.789	0.652	0.44
ΔPI 0–1 min	0.577	0.395–0.758	0.875	0.609	0.632	0.24
ΔPI 0–2 min	0.557	0.379–0.736	1.021	0.348	0.789	0.14
ΔPI 1–2 min	0.664	0.489–0.838	1.021	0.826	0.526	0.35
SV at PIH	0.773	0.626–0.921	57	0.652	0.842	0.49
ΔSV 0–1 min	0.54	0.36–0.72	0.984	0.652	0.526	0.18
ΔSV 0–2 min	0.579	0.401–0.757	1.00	0.783	0.421	0.20
ΔSV 1–2 min	0.77	0.628–0.912	1.078	0.565	0.895	0.46
SAP at PIH	0.831	0.702–0.959	78	0.609	0.947	0.56
MAP at PIH	0.698	0.528–0.868	53	0.609	0.789	0.40
PP at PIH	0.795	0.658–0.932	43	0.826	0.684	0.51
CO at PIH	0.481	0.296–0.666	3.64	0.652	0.526	0.18
CI at PIH	0.593	0.418–0.767	1.8	0.261	1.000	0.26
SVI at PIH	0.834	0.706–0.963	36	0.783	0.842	0.63
PVI at PIH	0.707	0.542–0.872	9	0.913	0.474	0.39
PPV at PIH	0.954	0.894–1.000	11	0.870	0.947	0.82

PIH: post-induction hypotension; Δ 0–1 min: relative change from post-induction hypotension to 1 min; Δ 0–2 min: relative change from post-induction hypotension to 2 min; Δ 1-2 min: relative change from 1 to 2 min; ROC: receiver operating curve; PI: peripheral perfusion index; SV: stroke volume; SBP: systolic arterial pressure; MAP: mean arterial pressure; PP: pulse pressure; CO: cardiac output; CI: cardiac index; SV: stroke volume; SVI: stroke volume index; PVI: pleth variability index; PPV: pulse pressure variation

ISSN: 1471-2253