Peritoneal Dialysis (PD) plays a crucial role in kidney replacement therapy. Its main role is reflected in the following aspects:

Peritoneal dialysis uses the peritoneum of the human body as a semi-permeable membrane. By injecting dialysate into the peritoneum, the removal of metabolic waste (such as urea, creatinine, etc.) and excess water in the body is realized by utilizing the solute gradient and osmotic pressure gradient on both sides of the peritoneum. This process helps maintain the stability of the patient's internal environment and reduces the various symptoms caused by kidney failure.

Compared with hemodialysis, peritoneal dialysis is easy to operate and can be done at home. Patients do not need to make frequent trips to the hospital, reducing transportation and time costs, while also having more time to engage in social activities and improving quality of life.

Compared with hemodialysis, peritoneal dialysis patients usually have fewer complications such as abnormal bone mineral metabolism, anemia, and hypertension. This is mainly due to the gentle regulation of the internal environment by peritoneal dialysis, as well as less interference with the patient's lifestyle. In addition, with the advancement of medical technology and the application of remote patient management system, the complication management of peritoneal dialysis has been further strengthened.

The development of peritoneal dialysis technology has not only improved the treatment effect and quality of life of patients, but also promoted the overall progress of medical technology, providing more possibilities for patients' precision treatment. At the same time, the popularization and application of peritoneal dialysis technology has also promoted the rational allocation and utilization of medical resources.

In summary, the membrane dialysis model plays an irreplaceable role in renal replacement therapy. It can not only effectively remove metabolic waste and excess water in the patient's body, improve the quality of life of patients, but also achieve personalized treatment and reduce the occurrence of complications. With the continuous progress and popularization of medical technology, peritoneal dialysis will bring good news to more patients with kidney disease.