Table 2 Corrected flow time (FTc), plethysmography variability index (PVI), and central venous pressure (CVP) at different times during liver resection
After induction | After abdominal fascia opening | After retractor application | 1 h after opening of fascia | Every 2 h of dissection | After resection | At end of surgery | Test of significance | |
|---|---|---|---|---|---|---|---|---|
Corrected flow time (FTc) (msec) TED-guided fluid | ||||||||
n | 20 | 19 | 20 | 20 | 13 | 20 | 20 | |
Min-max | 200.00–371.00 | 205.00–400.00 | 115.00–387.00 | 119.00–415.00 | 180.00–540.00 | 288.00–390.00 | 235.00–390.00 | χ2(df = 6) = 5.595 p = 0.470 NS |
Median | 324.50 | 319.00 | 319.50 | 332.00 | 327.00 | 330.00 | 352.00 | |
IQR | (275.00–335.50) | (255.00–350.00) | (304.00–342.00) | (294.00–355.50) | (300.00–341.00) | (311.50–350.00) | (322.00–360.50) | |
PVI-guided fluid | ||||||||
n | 20 | 20 | 20 | 20 | 14 | 20 | 20 | |
Min-max | 205.00–450.00 | 230.00–389.00 | 246.00–400.00 | 249.00–405.00 | 209.00–400.00 | 220.00–453.00 | 241.00–424.00 | χ2(df = 6) = 3.138 p = 0.791 NS |
Median | 310.00 | 324.50 | 334.50 | 344.00 | 320.50(260.00– | 342.00 | 354.50 | |
IQR | (251.50–342.00) | (284.00–355.00) | (304.00–370.00) | (301.00–356.50) | 372.00) | 271.00–388.00 | 313.50–399.00 | |
Test of significance | Ζ(MW) = 0.014 p = 0.989 NS | Ζ(MW) = 0.913 p = 0.361 NS | Ζ(MW) = 0.961 p = 0.337 NS | Ζ(MW) = 0.365 p = 0.715 NS | Ζ(MW) = 0.194 p = 0.846 NS | Ζ(MW) = 0.230 p = 0.818 NS | Ζ(MW) = 0.758 p = 0.449 NS | |
Plethysmography variability index (PVI) (%) TED-guided fluid | ||||||||
N | 20 | 20 | 20 | 20 | 14 | 20 | 20 | |
Min-max | 5.00–32.00 | 4.00–26.00 | 7.00–30.00 | 6.00–30.00 | 9.00–24.00 | 5.00–18.00 | 7.00–17.00 | χ2(df = 6) = 4.921 p = 0.554 NS |
Median | 11.00 | 12.00 | 13.00 | 12.00 | 13.50 | 10.50 | 12.00 | |
IQR | 9.00–14.00 | 9.50–14.50 | 9.50–16.50 | 9.50–15.50 | 10.00–14.00 | 8.50–13.50 | 8.50–13.50 | |
PVI-guided fluid | ||||||||
N | 20 | 20 | 20 | 20 | 14 | 20 | 20 | |
Min-max | 7.00–27.00 | 8.00–16.00 | 8.00–20.00 | 7.00–17.00 | 9.00–17.00 | 7.00–20.00 | 6.00–17.00 | χ2Χdf = 6) = 9.671 p = 0.139 NS |
Median | 13.00 | 11.50 | 12.50 | 13.50 | 11.50 | 15.00 | 14.00 | |
IQR | 11.00–15.00 | 10.00–14.00 | 11.00–14.50 | 10.50–15.00 | 11.00–14.00 | 12.00–15.50 | 11.00–15.50 | |
Test of significance | Ζ(MW) = 1.591 p = 0.112 NS | Ζ(MW) = 0.014 p = 0.989 NS | Ζ(MW) = 0.381 p = 0.704 NS | Ζ(MW) = 0.340 p = 0.734 NS | Ζ(MW) = 0.023 p = 0.981 NS | Ζ(MW) = 2.506 p = 0.012* | Ζ(MW) = 0.758 p = 0.449 NS | |
Central venous pressure (CVP) (mmHg) TED-guided fluid | ||||||||
n | 20 | 20 | 20 | 20 | 13 | 20 | 20 | |
Min-max | 6.50–15.00 | 6.50–15.00 | 5.00–16.00 | 5.00–17.00 | 2.00–15.00 | 4.60–15.00 | 6.00–15.00 | χ2(df = 6) = 2.723 p = 0.843 NS |
Median | 9.50 | 9.00 | 9.50 | 10.70 | 11.00 | 10.35 | 10.00 | |
IQR | 7.70–11.50 | 7.65–11.50 | 7.30–12.50 | 9.10–12.00 | 10.00–12.00 | 8.05–12.50 | 8.75–11.25 | |
PVI-guided fluid | ||||||||
n | 20 | 20 | 20 | 0 | 14 | 20 | 20 | |
Min-max | 5.00–14.00 | 5.00–15.00 | 1.00–14.00 | 7.00–14.00 | 0.00–14.00 | 4.60–14.60 | 3.80–15.00 | χ2(df = 6) = 4.329 p = 0.632 NS |
Median | 9.00 | 10.00 | 9.75 | 10.00 | 9.00 | 10.00 | 10.00 | |
IQR | 6.95–11.50 | 8.00–11.75 | 8.00–12.00 | 8.00–12.00 | 9.00–11.50 | 8.50–10.75 | (8.00–12.00) | |
Test of significance | Ζ(MW) = 0.827 p = 0.408 NS | Ζ(MW) = 0.258 p = 0.797 NS | Ζ(MW) = 0.054 p = 0.957 NS | Ζ(MW) = 0.448 p = 0.654 NS | Ζ(MW) = 1.055 p = 0.292 NS | Ζ(MW) = 0.571 p = 0.568 NS | Ζ(MW) = 0.314 p = 0.754 NS | |