Diagnosis of UF
Measurement of ultrafiltration capacity si necessary within clinical practice.These pati- ents tend to do wel on continuous ambulatory peritoneal dialysis (CAPD) as they UF wel over longer dwells and have fewer problems with fluid overload.Some units use the standard permeability analysis (SPA) test, which uses a 38.6% glucose dwell over 4hours and defines UF failure as anet UF of less than 40 ml, in the absence of any catheter leaks or mechanical problems (Ho-dac-Pannekeet et a,l.Measuring sodium dialysate/plasma (D/P) ratio at 1hour wil provide an estimate of the sodium sieving that occurs across the peritoneal vasculature.