Background: Hyperphosphatemia provides relevant and dangerous evidence of end-stage renal disease (ESRD) in patients undergoing periodic hemodialysis. The relationship between hyperphosphatemia and cardiovascular calcification, with the consequences of high morbidity and mortality after cardiovascular events, is well-defined. Hyperphosphatemia is treated by dietary limitation of phosphorus ingestion and by phosphate binders, but only half of ESRD patients fall within the range of K/DOQI guidelines.
Objective and methods: We summarize the results of our studies on salivary phosphate secretion in hemodialysis (HD) and chronic kidney disease (CKD) patients, and on the habit of HD patients to drink beverages with a high or low phosphate content. We also examine the correlation between hyperphosphoremia and the phosphate content of common beverages consumed by HD patients.
Results and conclusions: Higher levels of salivary phosphate secretion were found in HD and in CKD patients, along with a relationship between serum phosphorus levels and a high phosphate content of beverages in HD patients.