PD Prescription Guide: PET Calculations

PET Calculations10

D/P Creatinine =
***Corrected Dialysate Creatinine Concentration at 0-hr, 2-hr, 4-hr Dwell
Plasma Creatinine Concentration at 2-hr Dwell
D/Do Glucose =
Dialysate Glucose Concentration at 2-hr and 4-hr Dwell
Dialysate Glucose Concentration at 0-hr Dwell
Diagram of D/P Creatinine, D/D0 Glucose, and Membrane Transport Type with respect to 4-hour D/P Creatinine

If discordance in D/P creatinine and D/Do glucose is noted, it is recommended to repeat the PET. Clinical assessment must be taken into account if results remain discordant.10

Permission to use chart: Twardowski ZJ, Clinical Value of Standardized Equilibration Test in CAPD Patients, Current Concepts of CAPD, Blood Purif 1989;7:95-108.

***If nonenzymatic method (i.e. picric acid assay) is used for analysis of creatinine, be sure to use correction factor to accurately estimate creatinine value.

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