Which statement indicates the client with chronic kidney disease understands the purpose of using continuous ambulatory peritoneal dialysis (CAPD)?

The statement that indicates the client with chronic kidney disease understands the purpose of using continuous ambulatory peritoneal dialysis (CAPD) is that the treatment uses the peritoneum as a semipermeable membrane to clear toxins by osmosis and diffusion.

This is correct because CAPD relies on the peritoneal membrane, which lines the abdominal cavity, to facilitate the exchange of waste products and excess fluid between the blood and the dialysate solution. Osmosis and diffusion are the processes through which the waste products, such as urea and creatinine, along with excess electrolytes, are removed from the blood into the dialysate. This allows for effective clearing of toxins even when the patient is mobile, highlighting the key feature of CAPD as a continuous and patient-managed dialysis method.

Understanding this mechanism is crucial for clients undergoing CAPD, as it empowers them to recognize how the treatment works and its benefits in managing their kidney disease.