This section provides documents to assist patients in performing and interpreting biological tests, required in their follow-up, including blood tests and urine analyses.
In hypoparathyroidism, the objective is to maintain calcium in the low-normal range to reduce urinary calcium loss and minimise risks of kidney stones, nephrocalcinosis and chronic kidney disease. Target blood calcium levels usually should range between 2.0 and 2.15 mmol/L, sometimes higher depending on symptom severity. Blood phosphate, magnesium, vitamin D status and urine calcium are expected to remain within normal ranges. Urine calcium excretion should stay below 0.1 mmol/kg/day based on a 24-hour urine collection, but this aim is hard to obtain for a lot of patients, due to the chronic calcium loss.
Biological regular follow-up at a minimum of every six months is recommended (calcium, phosphate, magnesium). Kidney function requires monitoring (blood creatinine), along with risk assessment for kidney stones through 24-hour urine collections and imaging (ultrasound or non contrast computed tomography (CT)). Ophtalmology assessments are advised due to cataract risk. Dental check-ups are important and should be performed annually. Brain calcifications (Fahr syndrome) may occur but are rarely symptomatic; routine brain imaging is not typically recommended.