Peritoneal Fluid Transport rather than Peritoneal Solute Transport Associates with Dialysis Vintage and Age of Peritoneal Dialysis Patients

Table 2

Parameters of the pore model (mean ± SD) estimated from sPET data using the 2p model and the correlation coefficients rho for the correlation of the parameters of the 2p model with patient age and dialysis vintage in 33 prevalent patients undergoing peritoneal dialysis.

Parameters	2p model	Correlation with age	Correlation with dialysis vintage
Fluid transport
LpS [mL/min/mmHg]	0.033 ± 0.022	−0.46	−0.59
PA [mL/min]	1.3 ± 0.95	NS	−0.55
	0.07 ± 0.07	0.35	0.55
	0.93 ± 0.07	−0.35	−0.55
	0.104 ± 0.066	0.35	0.55
OCG [mL/min/mmHg]	0.0023 ± 0.0008	−0.47	−0.52
Solute transport
[mL/min]	7.7 ± 2.3	0.36	NS
[mL/min]	4.2 ± 3.5	NS	NS
[mL/min]	15.9 ± 3.7	NS	0.37
[mL/min]	8.0 ± 2.8	NS	NS
[mL/min]	9.5 ± 3.3	NS	NS

LpS, hydraulic permeability; PA, peritoneal absorption rate; and , fractional contribution of ultrasmall and small pores, respectively, to LpS; , , , , , and , diffusive mass transport coefficients for glucose (G), sodium (Na), urea (U), creatinine (Cr), and phosphate (P) (these parameters were estimated from clinical data); , reflection coefficient for glucose, and OCG, osmotic conductance for glucose, were calculated as described in Methods; NS, not significant.