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Table 5 Total and ionized concentrations of magnesium and calcium according to treatment conditions in group CiDi

From: Effects of on-line hemodiafiltration regimens and dialysate composition on serum concentrations of magnesium and calcium ions

Substitution volume [L/session]

Pre-dilution

Post-dilution

HD (n = 6)

P (5 groups)

60 (n = 6)

84 (n = 6)

8 (n = 6)

16 (n = 6)

Pre-dialysis values

 Total magnesium (mg/dL)

2.32 ± 0.37

2.32 ± 0.35

2.27 ± 0.33

2.25 ± 0.32

2.32 ± 0.39

0.995

 Ionized magnesium (mmol/L)

0.53 ± 0.05

0.52 ± 0.06

0.52 ± 0.04

0.53 ± 0.05

0.52 ± 0.06

0.994

 Total calcium (mg/dL)

9.33 ± 0.76

9.27 ± 0.83

9.23 ± 0.54

9.35 ± 0.71

9.12 ± 0.59

0.979

 Ionized calcium (mmol/L)

1.13 ± 0.05

1.15 ± 0.06

1.11 ± 0.07

1.17 ± 0.06

1.14 ± 0.05

0.588

 pH

7.40 ± 0.02

7.39 ± 0.02

7.39 ± 0.03

7.40 ± 0.02

7.40 ± 0.02

7.848

Post-dialysis values

 Total magnesium (mg/dL)

1.92 ± 0.10

1.97 ± 0.12

1.85 ± 0.14

1.92 ± 0.12

1.92 ± 0.19

0.488

 Ionized magnesium (mmol/L)

0.39 ± 0.05

0.40 ± 0.04

0.38 ± 0.05

0.39 ± 0.04

0.40 ± 0.04

0.956

 Total calcium (mg/dL)

9.60 ± 0.20

9.62 ± 0.36

9.65 ± 0.19

9.67 ± 0.31

9.45 ± 0.19

0.437

 Ionized calcium (mmol/L)

1.14 ± 0.02

1.14 ± 0.01

1.13 ± 0.03

1.14 ± 0.03

1.13 ± 0.03

0.868

 pH

7.46 ± 0.01

7.46 ± 0.01

7.45 ± 0.01

7.47 ± 0.02

7.47 ± 0.02

0.557

Pre-dialysis to post-dialysis

 Total magnesium (%)

83.8 ± 8.4

86.0 ± 9.4

82.4 ± 6.9

86.1 ± 8.1

83.8 ± 9.1

0.928

 Ionized magnesium (%)

74.9 ± 7.7

75.6 ± 9.0

73.8 ± 10.3

73.3 ± 9.8

78.3 ± 10.2

0.904

 Total calcium (%)

103.3 ± 6.1

104.2 ± 5.7

104.7 ± 5.0

103.7 ± 4.6

103.9 ± 5.1

0.999

 Ionized calcium (%)

100.8 ± 4.6

99.4 ± 4.1

101.9 ± 4.4

98.1 ± 5.7

99.3 ± 5.6

0.717

 pH

100.9 ± 0.2

100.9 ± 0.2

100.9 ± 0.3

100.9 ± 0.2

101.0 ± 0.5

0.988

Removal amount

 Magnesium (mg)

104 ± 80

113 ± 87

37 ± 68

120 ± 50

141 ± 63

0.192

 Calcium (mg)

294 ± 210

222 ± 107

267 ± 134

294 ± 199

217 ± 115

0.941

Albumin leakage (g/session)

3.1 ± 0.3

3.3 ± 0.3

4.9 ± 0.7

5.1 ± 0.9

3.2 ± 0.5

0.003