Which statement about phosphate control in dialysis patients is true?

• A. Dialysis Completely Controls Phosphorus; Diet Unchanged
• B. Phosphorus Restrictions Are Optional With Dialysis
• C. Phosphate Binders Are Never Needed With Dialysis
• D. Dialysis Removes Phosphate But Ongoing Phosphate Restriction And Phosphate Binders Are Still Needed

Answer: (D)

Phosphate control in dialysis hinges on using multiple approaches together rather than relying on dialysis alone. Dialysis does remove some phosphate from the blood during a session, but it cannot eliminate the entire daily phosphate load. Dietary phosphate is absorbed continuously, and phosphate can re-accumulate between sessions, so levels tend to rise unless additional measures are used.

Because of this, ongoing dietary phosphate restriction is still necessary. In addition, phosphate binders are prescribed to bind phosphate in the gut so that less is absorbed with meals. These binders must be taken with meals and work in the intestinal tract to reduce total phosphate absorbed into the bloodstream.

Together, dialysis, dietary limits, and binders help keep serum phosphate closer to the target range and reduce complications like secondary hyperparathyroidism and vascular calcification. This explains why the statement that dialysis removes phosphate but ongoing restriction and binders are still needed is the best description of phosphate control in dialysis patients.