Total chlorine levels in dialysis water are tested at what intervals?

• A. Before each patient shift
• B. Every hour
• C. Before each patient shift or every four hours
• D. Daily at end of shift

Answer: (C)

Total chlorine in dialysis water is checked to confirm the water is safe for the dialysis circuit. Residual chlorine or chloramines can irritate patients and damage the dialyzer membranes, so keeping chlorine levels within safe limits is essential for patient safety. Because water quality can change as the day goes on—through changes in system function, sanitizer dosing, or storage conditions—the standard practice is to verify safety right before a patient shift and then, if needed, recheck at longer intervals during the shift. Testing before each patient shift or every four hours provides timely detection of any rise in chlorine levels without requiring constant daily monitoring. Checking hourly would be overly frequent for typical practice, and testing only at the end of the shift could miss problematic changes earlier.