Table 3. Kinetically derived parameters for the various solutes as derived from measured solute concentrations during a single midweek dialysis session.

Solute	V1(L)	Vtot(L)	K21(mL/min)
urea	10.2 ± 5.6	32.9 ± 8.1	457 ± 175
PCG	8.2 ± 2.4	18.9 [15.7;25.2]	103 ± 47 α
HA	8.4 ± 3.8	20.9 ± 4.7 α	169 ± 81 α
IAA	4.9 ± 1.5 αβ	24.7 ± 10.6	123 ± 46 α
IS	3.7 [3.7;4.2] αβ	16.5 ± 6.5 α	85 ± 72 α
PCS	3.8 ± 0.9βγ	10.4 [9.8;15.1] αδ	87 ± 44 α

V₁: plasmatic volume, V_tot: total distribution volume, K₂₁: intercompartment clearance. PCG: p-cresylglucuronide, HA: hippuric acid, IAA: indole acetic acid, IS: indoxyl sulfate, PCS: p-cresylsulfate. P<0.05:

^αversus urea;

^βversus PCG;

^γversus HA;

^δversus IAA.