What is the purpose of the solution delivery system (SDS) in dialysis machines?

The solution delivery system (SDS) in dialysis machines is specifically designed to mix and deliver dialysate concentrate solutions. This process is critical in ensuring that the dialysate, which is essential for the effective removal of waste products and excess fluids from the blood during dialysis, is prepared correctly. The SDS accurately combines the appropriate concentrates with purified water to create a dialysate that has the ideal chemical composition needed for the treatment. This precision helps maintain the osmotic and diffusion gradients that are necessary for effective dialysis, ultimately supporting the patient's health and treatment outcomes.

In contrast, monitoring patient vitals is essential for ensuring safety during the procedure but is not the function of the SDS. Similarly, while there are components of the dialysis machine designed to manage waste products, the SDS is not responsible for storing them. Finally, filtering blood happens in a different part of the dialysis machine known as the dialyzer, and is separate from the function of the SDS, which focuses solely on the preparation and delivery of the dialysate.