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Table 1 Key surgical variables

From: Volume kinetic analysis of fluid retention after induction of general anesthesia

Measured Variable

Result

N

25

Age (years)

47 (5)

Body weight (kg)

75 (14)

Infused fluid volume (mL)

1869 (336)

Mean arterial pressure (mmHg)

 Before induction

100 (15)

 After induction

80 (10)

 End of infusion

92 (17)

 During surgerya

85 (14)

 End of study (90 min)

91 (18)

Blood Hb (g/L)

 Before induction

119.5 (16.3)

 After induction

117.1 (15.9)

 End of infusion

95.8 (14.2)

 End of study (90 min)

104.6 (15.8)

 Brain natriuretic peptide (BNP; ng/L)a

20.9 (11.2)

 Plasma syndecan-1 (ng/mL)a

12.8 (8.6–20.9)

 Plasma heparan sulfatea

6.5 (4.9–10.3)

 Operating time (min)

91 (10)

 Blood loss (mL)

150 (100–162)

 Urinary excretion (mL)

50 (39–70)

  1. a based on the mean for all intraoperative measurements
  2. Data are mean (SD) or median (25th–75th percentile)