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Table 4 Total and ionized concentrations of magnesium and calcium according to treatment conditions in group StDi-2

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)

2.30 ± 0.35

2.27 ± 0.30

2.33 ± 0.32

2.22 ± 0.30

2.30 ± 0.28

0.983

 Ionized magnesium (mmol/L)

0.61 ± 0.10

0.56 ± 0.04

0.55 ± 0.06

0.53 ± 0.05

0.57 ± 0.05

0.545

 Total calcium (mg/dL)

9.08 ± 0.72

8.98 ± 0.65

8.95 ± 0.45

9.12 ± 0.47

9.13 ± 0.41

0.969

 Ionized calcium (mmol/L)

1.16 ± 0.08

1.16 ± 0.11

1.14 ± 0.07

1.15 ± 0.07

1.16 ± 0.05

0.992

 pH

7.38 ± 0.03

7.38 ± 0.01

7.38 ± 0.03

7.38 ± 0.02

7.38 ± 0.02

0.591

Post-dialysis values

 Total magnesium (mg/dL)

1.93 ± 0.14

1.95 ± 0.16

2.00 ± 0.15

1.95 ± 0.10

1.93 ± 0.12

0.911

 Ionized magnesium (mmol/L)

0.45 ± 0.05

0.44 ± 0.03

0.49 ± 0.02

0.43 ± 0.04

0.46 ± 0.02

0.166

 Total calcium (mg/dL)

9.92 ± 0.23

9.70 ± 0.18

10.0 ± 0.22

10.0 ± 0.25

9.95 ± 0.20

0.113

 Ionized calcium (mmol/L)

1.27 ± 0.06

1.21 ± 0.07

1.28 ± 0.02

1.27 ± 0.07

1.25 ± 0.04

0.207

 pH

7.41 ± 0.03

7.41 ± 0.03

7.42 ± 0.03

7.41 ± 0.02

7.41 ± 0.02

0.790

Pre-dialysis to post-dialysis

 Total magnesium (%)

85.1 ± 9.2

86.6 ± 6.2

86.4 ± 6.7

87.2 ± 7.9

84.6 ± 5.6

0.967

 Ionized magnesium (%)

73.9 ± 7.3

79.1 ± 11.8

79.3 ± 7.9

78.4 ± 8.3

81.3 ± 9.5

0.373

 Total calcium (%)

109.0 ± 7.9

108.4 ± 6.9

111.9 ± 4.0

110.1 ± 5.8

109.1 ± 4.1

0.878

 Ionized calcium (%)

109.8 ± 6.7

105.8 ± 4.4

112.8 ± 7.0

109.2 ± 2.5

107.5 ± 6.7

0.672

 pH

100.3 ± 0.4

100.5 ± 0.4

100.6 ± 0.5

100.4 ± 0.3

100.4 ± 0.3

0.750

Removal amount

 Magnesium (mg)

90 ± 95

67 ± 62

43 ± 72

128 ± 91

87 ± 94

0.513

 Calcium (mg)

196 ± 154

81 ± 85

187 ± 160

204 ± 90

202 ± 113

0.397

Albumin leakage (g/session)

3.1 ± 1.2

3.0 ± 0.4

4.3 ± 0.9

5.2 ± 0.9

2.8 ± 0.5

< 0.001