Questions About PD
As commonly used, the peritoneal equilibration test (PET) is the most familiar, consisting
of a 4-hour dwell of 2.27% glucose dialysate, with a net ultrafiltration volume of less than 100 mL defining ultrafiltration failure. The alternative is the modified PET, which uses 3.86%
glucose dialysate. In that test, an ultrafiltration volume of less than 400 mL defines ultrafiltration failure. The modified PET is a more reliable measure than the standard PET in diagnosing the presence of ultrafiltration failure. In addition, it allows for assessment of
the phenomenon of sodium sieving, which provides further information regarding membrane function, including water transport across endothelial aquaporin water channels.