Which PD adequacy metric includes residual renal function in its calculation?

Which PD adequacy metric includes residual renal function in its calculation?

• A. Weekly creatinine clearance (including residual function).
• B. Post-dialysis potassium level.
• C. Dialysate osmolarity.
• D. Urine specific gravity.

Answer: (A)

The main idea is that PD adequacy is about how effectively wastes are cleared over time, and residual kidney function adds to that clearance. Weekly creatinine clearance that includes residual function captures the total amount of waste removal by combining what the kidneys still do with what the peritoneal dialysis process achieves in a week. Because residual renal function can contribute significantly to solute clearance, adding it to the PD clearance gives a more complete picture of overall adequacy. Other options aren’t used to quantify weekly clearance. A post-dialysis potassium level is a single lab value used for electrolyte management, not a measure of weekly waste removal. Dialysate osmolarity affects fluid and solute transport properties but isn’t a metric of adequacy. Urine specific gravity tells you about urine concentration, not the overall, week-long clearance achieved with PD plus any remaining kidney function.

The main idea is that PD adequacy is about how effectively wastes are cleared over time, and residual kidney function adds to that clearance. Weekly creatinine clearance that includes residual function captures the total amount of waste removal by combining what the kidneys still do with what the peritoneal dialysis process achieves in a week. Because residual renal function can contribute significantly to solute clearance, adding it to the PD clearance gives a more complete picture of overall adequacy.

Other options aren’t used to quantify weekly clearance. A post-dialysis potassium level is a single lab value used for electrolyte management, not a measure of weekly waste removal. Dialysate osmolarity affects fluid and solute transport properties but isn’t a metric of adequacy. Urine specific gravity tells you about urine concentration, not the overall, week-long clearance achieved with PD plus any remaining kidney function.