What is the role of the PD cycler, and when is it typically used?

• A. Automates multiple overnight exchanges in automated PD (APD); used for overnight therapy or when daytime exchanges are not feasible.
• B. Provides hemodialysis while PD is interrupted.
• C. Replaces dialysate with icodextrin.
• D. Measures patient’s ultrafiltration rate.

Answer: (A)

The main idea is that a PD cycler automates the exchange process in automated PD. It runs overnight, performing multiple fill–dwell–drain cycles with minimal input from the patient. This makes it possible to deliver a higher dialysis dose while the patient sleeps or when daytime exchanges aren’t convenient or feasible. The cycler provides consistent timing and volumes for each exchange, which helps with fluid management and solute clearance without requiring the patient to manualy perform several exchanges during the day. It’s not used to provide hemodialysis during PD interruption, not to replace dialysate with icodextrin, and not to measure ultrafiltration rate—the job of the cycler is to manage the automated exchanges.