What is the primary function of a sediment filter in hemodialysis?

The primary function of a sediment filter in hemodialysis is to strain out particles, solutes, and other substances of a given size. This filtration process is crucial as it helps to ensure that impurities and larger particles do not enter the dialysis circuit, which could lead to complications during treatment. The sediment filter effectively maintains the integrity of the dialysis process by removing contaminants that could interfere with the functioning of the dialysis machine or affect the patient's safety.

The other options do not accurately reflect the role of a sediment filter. Increasing blood flow to the kidneys pertains more to renal physiology and the body's response during or after dialysis rather than the specific function of a filter. Measuring fluid levels in the bloodstream involves different monitoring devices, not necessarily a sediment filter, which is designed solely for filtration. Preventing infection is typically managed through aseptic techniques and sterilization practices rather than solely through the function of the sediment filter. Hence, option B clearly articulates the essential role of the sediment filter in hemodialysis.