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Table 3 Total and ionized concentrations of magnesium and calcium according to treatment conditions in group StDi-1

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)

2.60 ± 0.12

2.50 ± 0.10

2.58 ± 0.13

2.50 ± 0.20

2.54 ± 0.23

0.817

 Ionized magnesium (mmol/L)

0.64 ± 0.03

0.59 ± 0.03

0.62 ± 0.04

0.60 ± 0.04

0.59 ± 0.03

0.146

 Total calcium (mg/dL)

8.96 ± 0.76

9.22 ± 0.78

9.16 ± 0.62

9.18 ± 0.76

9.02 ± 0.79

0.981

 Ionized calcium (mmol/L)

1.16 ± 0.09

1.15 ± 0.08

1.17 ± 0.06

1.14 ± 0.07

1.12 ± 0.11

0.926

 pH

7.38 ± 0.03

7.40 ± 0.03

7.40 ± 0.02

7.38 ± 0.03

7.39 ± 0.04

0.861

Post-dialysis values

 Total magnesium (mg/dL)

1.98 ± 0.11

2.04 ± 0.13

1.98 ± 0.13

1.88 ± 0.11

1.98 ± 0.04

0.283

 Ionized magnesium (mmol/L)

0.48 ± 0.06

0.47 ± 0.06

0.45 ± 0.06

0.47 ± 0.04

0.48 ± 0.05

0.229

 Total calcium (mg/dL)

9.08 ± 0.28

8.96 ± 0.25

9.18 ± 0.17

9.10 ± 0.22

9.12 ± 0.28

0.705

 Ionized calcium (mmol/L)

1.20 ± 0.02

1.19 ± 0.03

1.16 ± 0.05

1.18 ± 0.03

1.19 ± 0.03

0.524

 pH

7.42 ± 0.01

7.41 ± 0.03

7.42 ± 0.03

7.41 ± 0.02

7.41 ± 0.02

0.951

Pre-dialysis to post-dialysis

 Total magnesium (%)

76.3 ± 6.3

81.6 ± 4.5

76.9 ± 7.0

75.5 ± 5.4

78.4 ± 7.0

0.551

 Ionized magnesium (%)

75.3 ± 7.6

80.6 ± 10.2

72.6 ± 8.3

80.0 ± 9.1

81.9 ± 11.5

0.496

 Total calcium (%)

101.5 ± 6.1

97.6 ± 5.9

100.5 ± 5.4

99.6 ± 7.5

101.5 ± 6.2

0.843

 Ionized calcium (%)

103.8 ± 6.3

104.0 ± 5.2

99.5 ± 6.5

104.5 ± 5.2

106.4 ± 9.2

0.586

 pH

100.4 ± 0.3

100.2 ± 0.5

100.2 ± 0.3

100.3 ± 0.4

100.3 ± 0.3

0.827

Removal amount

 Magnesium (mg)

129 ± 97

126 ± 57

102 ± 72

128 ± 107

129 ± 55

0.979

 Calcium (mg)

472 ± 176

385 ± 183

362 ± 126

343 ± 152

470 ± 181

0.615

Albumin leakage (g/session)

3.5 ± 0.6

3.0 ± 0.3

4.3 ± 0.7

5.5 ± 0.7

3.0 ± 0.4

< 0.001