Spurious Hyperphosphatemia From Alteplase-Treated Catheter: A Case Report and Literature Review.

Falsely elevated phosphate levels can occur when blood is drawn after alteplase use in dialysis catheters due to phosphorus-containing excipients. Recognizing spurious hyperphosphatemia is important to prevent misdiagnosis, avoid inappropriate treatment changes, and ensure accurate phosphate monitoring in patients undergoing maintenance hemodialysis.