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Table 3 Blood physicochemical parameters in the course of acute kidney injury (AKI)

From: Physicochemical analysis of blood and urine in the course of acute kidney injury in critically ill patients: a prospective, observational study

  

Day -2 (n = 13)

Day -1 (n = 21)

Day 0 (n = 168)

Day +1 (n = 164)

Day +2 (n = 117)

SIDa (mEq/L)

No-AKI

-

-

39.2 [35.7,42.7]

39.3 [35.9,42.9]

40.1 [37.4,43.9]

transient

35.8 [33.7,39.8]

39.9 [37.1,41.6]

39.6 [36.0,42.7]

39.2 [36.2,43.4]

39.5 [37.0,43.3]

persistent

39.5 [37.1,44.6]

40.2 [38.4,47.4]

38.5 [35.9,40.7]

38.8 [36.5,42.6]

39.7 [37.6,44.6]

P

  

*0.75/**0.45/*** 0.63

0.96/ 0.77/ 0.92

0.89/ 0.90/ 0.90

SIDe (mEq/L)

No-AKI

-

-

32.9 [29.7,37.4]

33.7 [30.9,37.4]

34.6 [32.1,38.3]

transient

35.5 [31.1,36.9]

32.2 [30.2,34.7]

33.0 [28.3,36.3]

34.7 [30.6,37.2]

35.9 [30.9,40.0]

persistent

34.1 [31.8,37.1]

33.8 [29.3,38.2]

29.8 [27.4,35.0]

31.0 [26.8,34.7]

32.4 [29.7,35.3]

P

  

0.07/ 0.07/ 0.85

0.12/ 0.04/ 0.38

0.03/ 0.03/ 0.73

SIG (mEq/L)

No-AKI

-

-

4.8 [2.9,7.3]

4.8 [3.3,6.4]

5.2 [4.1,7.1]

transient

4.6 [3.0,4,9]

6.5 [5.7,8.2]

5.9 [4.1,7.3]

5.1 [3.5,7.1]

4.3 [2.0,6.6]

persistent

6.3 [4.0,7.7]

7.9 [5.0,9.1]

7.1 [4.7,9.7]

8.7 [5.8,10.8]

7.6 [5.2,10.3]

P

  

0.01/ 0.26/ 0.22

0.00/ 0.00/ 0.33

0.01/ 0.00/ 0.12

Phosphate – (mEq/L)

No-AKI

-

-

1.9 [1.3,2.3]

1.4 [1.2,1.9]

1.4 [1.1,1.9]

transient

1.6 [1.5,2.0]

1.7 [1.4,2.0]

2.2 [1.6,2.8]

1.7 [1.3,2.0]

1.3 [1.1,2.0]

persistent

1.4 [1.3,1.5]

2.1 [1.3,2.5]

2.4 [1.7,3.1]

2.2 [1.6,2.8]

2.2 [1.6,2.7]

P

  

0.02/ 0.22/ 0.06

0.00/ 0.01/ 0.12

0.00/ 0.00/ 0.55

Albumin – (mEq/l)

No-AKI

-

-

8.8 [6.8,9.8]

8.0 [6.6,9.3]

8.3 [6.9,9.4]

transient

5.8 [5.3,6.4]

5.6 [5.2,6.4]

8.0 [7.1,9.0]

7.9 [6.8,9.2]

7.8 [6.9,9.0]

persistent

8.3 [7.5,8.9]

7.9 [7.1,8.8]

7.1 [6.2,8.3]

7.0 [6.2,7.9]

7.0 [6.5,8.1]

P

  

0.01/0.07/ 0.19

0.00/ 0.02/ 0.50

0.14/ 0.22/ 0.55

  1. Day 0: day of AKI diagnosis; SIDa: apparent strong ion difference; SIDe: effective strong ion difference; SIG: strong ion gap (=SIDa-SIDe).
  2. * among the three groups; ** between transient and persistent AKI; *** between no-AKI and transient AKI.