Pulse pressure variation and stroke volume variation during increased intra-abdominal pressure: an experimental study

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.

ISSN: 1364-8535