Peritoneal Equilibration Test

Peritoneal Equilibration Test (PET) is a medical procedure used to evaluate the peritoneum's capacity to transport solutes and water. It is primarily used in the field of nephrology to assess the suitability of a patient for peritoneal dialysis.

Overview

The Peritoneal Equilibration Test was first described by Dr. Robert Krediet in 1987. The test measures the rate at which solutes, such as creatinine and glucose, are transferred from the blood into the peritoneal cavity and vice versa. This information is used to classify patients into one of four peritoneal transport categories: high, high average, low average, and low.

Procedure

The PET begins with the infusion of a dialysate solution containing a known concentration of glucose into the peritoneal cavity. After a four-hour dwell time, the dialysate is drained and samples are taken for analysis. The concentrations of glucose and creatinine in the drained dialysate and in a blood sample taken at the same time are then compared to determine the peritoneal transport rate.

Interpretation

The results of the PET are used to guide the choice of peritoneal dialysis prescription. Patients with a high peritoneal transport rate may require more frequent exchanges of dialysate, while those with a low rate may be able to use a cycler machine for automated overnight dialysis.

Risks and Complications

As with any medical procedure, the PET carries some risks. These include the risk of peritonitis due to contamination of the dialysate, and the risk of hernia or leakage due to the pressure of the dialysate in the abdomen.

See Also

• Peritoneal dialysis
• Nephrology
• Dialysate
• Peritonitis

References

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