How often should the CAP values and the CAP /CIP Ratio be measured?
The first determination to establish is whether the patient is being initially diagnosed for an otherwise unsuspected disease, or whether the patient is being monitored for therapy. As a rule, diagnosis for unsuspected disease requires less frequent PTH testing as compared to testing for PTH to monitor therapy for secondary hyperparathyroidism. Diagnosis for unsuspected disease may be as infrequent as 1-2 times per year; whereas, therapeutic monitoring of PTH may be as frequent as monthly.
