Table 2.
Effects of alterations in IAP and volemia on dynamic indices of fluid responsiveness
| IAP (mmHg) | 0 † | 30 † | 30 before FL † | 30 after FL † |
|---|---|---|---|---|
| SVV (%) | ||||
| Before blood withdrawal | 21 ± 13 | 57 ± 26# | 60 ± 26 | 48 ± 20 |
| After blood withdrawal | 49 ± 15* | 99 ± 24#* | 81 ± 16* | 45 ± 17♣ |
| PPV (%) | ||||
| Before blood withdrawal | 23 ± 9 | 50 ± 23# | 50 ± 22 | 42 ± 11 |
| After blood withdrawal | 43 ± 13* | 68 ± 20#* | 67 ± 16* | 38 ± 11♣ |
| SPV (mmHg) | ||||
| Before blood withdrawal | 7 ± 3 | 21 ± 5# | 23 ± 5 | 22 ± 6 |
| After blood withdrawal | 11 ± 5* | 24 ± 6# | 26 ± 4 | 22 ± 6♣ |
| %SPV (%) | ||||
| Before blood withdrawal | 8 ± 3 | 19 ± 5# | 19 ± 4 | 17 ± 4 |
| After blood withdrawal | 15 ± 5* | 25 ± 4#* | 26 ± 3* | 18 ± 5♣ |
| Δup (mmHg) | ||||
| Before blood withdrawal | 2 ± 3 | 13 ± 4# | 11 ± 3 | 13 ± 4 |
| After blood withdrawal | 0 ± 4 | 9 ± 5# | 8 ± 6 | 13 ± 4 |
| Δdown (mmHg) | ||||
| Before blood withdrawal | 6 ± 5 | 8 ± 5 | 8 ± 5 | 7 ± 1 |
| After blood withdrawal | 12 ± 7* | 16 ± 6* | 16 ± 4* | 9 ± 3♣ |
Definition of abbreviations: FL, fluid loading; PPV, pulse pressure variation; SPV, systolic pressure variation; %SPV, (SPV/maximal systolic pressure) × 100; SVV, stroke volume variation.
#: P < 0.05 vs IAP 0; * : P < 0.05 vs before blood withdrawal; ♣ : P < 0.05 vs IAP 30 before FL.
†: before blood withdrawal, n = 9 at IAP 0, 30, 30 before FL, and 30 after FL; after blood withdrawal, n = 9 at IAP 0 and 30, n = 7 at IAP 30 before FL and 30 after FL.