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Table 1 Demographic data and volume kinetic analysis of the three series of crystalloid fluid infusions

From: Interstitial washdown and vascular albumin refill during fluid infusion: novel kinetic analysis from three clinical trials

 

Volunteers

Anesthesia

Ketoacidosis

Demographics

 Subjects/infusions (N)

25/25

30/30

17/31

 Females/males (N)

0/25

25/4

2/15

 Age (years)

32 ± 7

55 ± 16

50 ± 22

 Body weight (kg)

80 ± 9

69 ± 11

72 ± 11

 Hb at baseline (g/L)

135 ± 8

123 ± 11*

135 ± 25

Parameter base model

 k12 (10–3 min−1)

34.0 ± 3.0

66.2 ± 7.7

83.3 ± 2.2

 k21 (10–3 min−1)

12.4 ± 2.1

33.3 ± 4.5

79.4 ± 2.2

 k10 (10–3 min−1)

11.8 ± 0.2

2.4 ± 0.5

13.2 ± 2.6

 kb (10–3 min−1)

1.1 ± 0.1

5.4 ± 1.6

5.8 ± 2.6

Covariance

 k12

6.7 ± 1.9

2.3 ± 0.7

None

 k21

7.3 ± 4.9

2.7 ± 1.2

-0.9 ± 0.1

 k10

− 4.2 ± 0.9

2.9 ± 1.4

-1.7 ± 0.8

 kb

None

5.2 ± 2.8

-2.3 ± 0.3

  1. The fluid distribution is given by the four top rate constants. These are modified by covariance with the difference between the Hb and albumin dilution, representing the washdown of interstitial albumin, at each point in time in each subject (time-varying covariate). Linear covariance models were used
  2. Data are the mean ± SD. *After induction of general anesthesia