Table 4.

Electrolyte and laboratory changes 15 and 30 minutes posthemodialysis

Laboratory ParameterMean (SEM), N Subjects, N Hemodialysis Sessions P Value (Post Versus 15 Minutes Post)Mean (SEM), N Subjects, N Hemodialysis Sessions P Value (Post Versus 30 Minutes Post)
PrehemodialysisPosthemodialysis15 min PosthemodialysisDelta (15 Minutes Post Minus Post)30 Minutes PosthemodialysisDelta (30 Minutes Post Minus Post)
Sodium (mEq/L)136.9 (0.5)137.3 (0.3)139.2 (0.4)0.5 (0.3)0.10138.7 (0.5)−0.1 (0.3)0.80
666640403838
1708168540403838
Potassium (mEq/L)4.9 (0.1)3.6 (0.1)3.6 (0.1)−0.1 (0.1)0.263.8 (0.1)0.2 (0.1)0.03
666640403838
1699168940403838
Bicarbonate (mEq/L)22.3 (0.4)27.1 (0.4)27.0 (0.7)−1.1 (0.5)0.0227.5 (0.5)−0.7 (0.2)<0.01
666640403838
1707169040403838
Calcium (mg/dl)8.7 (0.1)9.4 (0.1)8.9 (0.2)−0.6 (0.2)<0.019.2 (0.1)−0.3 (0.1)<0.01
666640403838
1708168540403838
Magnesium (mg/dl)2.4 (0.1)2.1 (0.1)1.8 (0.1)−0.1 (0.04)0.081.9 (0.04)0.01 (0.02)0.59
666640403838
1708169040403838
Phosphate (mg/dl)5.2 (0.2)2.2 (0.1)2.4 (0.1)0.1 (0.1)0.032.6 (0.1)0.4 (0.1)<0.001
666639393838
1706168239393838
BUN (mg/dl)56.2 (1.6)16.2 (0.6)16.9 (1.2)0.8 (0.6)0.1918.9 (1.2)2.5 (0.4)<0.001
666624243824
1713169524242424
Creatinine (mg/dl)9.8 (0.4)3.5 (0.2)4.2 (0.3)0.2 (0.1)0.204.7 (0.3)0.6 (0.1)<0.001
666639393838
1713169539393838
Albumin (g/dl)3.9 (0.04)4.3 (0.1)4.1 (0.1)−0.4 (0.1)0.0014.3 (0.1)−0.2 (0.1)<0.001
666640403838
1708169140403838
  • Mean differences (delta) were calculated using data from subjects who had both pre- and postmeasurement for each given electrolyte. The total number of sessions with laboratory data may vary due to missing collections or data recording. Percentages may not add to 100 due to rounding. HD, hemodialysis.