Table 2.

Mass balance index (MBI) evaluated by Diascan and calculated from conductivity gradient during dialysis sessions with and without thiosulfate

VariableMBI from Dialysis Monitor (mmol)Calculated MBI (mmol)Sodium Load not Dialyzed (mmol)Sodium Load Not Dialyzed + Calculated MBI (mmol)Sodium Load Not Dialyzed + Dialysis Monitor MBI (mmol)Difference T+ and T− from Dialysis Monitor MBI (mmol)Difference T+ and T− from Calculated MBI (mmol)
T−385 ± 1444561.6456385
T+, Cd = 14 mS/cm493 ± 134*52679608572152187
Thiosulfate+, Cd = 13 mS/cm during last hour527 + 136*58716603543147158
  • Sodium load not dialyzed is evaluated from the mean variations of plasma conductivities (appendix 2). The difference of sodium load between sessions with and without thiosulfate is calculated from the dialysis monitor MBI and from the calculated MBI. The different calculations well estimate the amount of sodium content into 25 g thiosulfate (161 mmol).