Age

3–17

Sex

ALL

Healthy volunteers

Not accepted

Children from 3 to 17 years of age
On maintenance dialysis : hemodialysis, hemodiafiltration, peritoneal dialysis
Patient who begin treatment with cinacalcet based on the 2019 European guidelines and at the discretion of the treating physician
With normal QTc interval on electrocardiogram
With total serum calcium \>2.40 mmol/L
With heamoglobin \> 8g/dl
Non - opposition from parents/legal guardians

Children \< 12 kg
Persons deprived of their liberty by a judicial or administrative decision
Persons under psychiatric care
Persons admitted to a health or social institution for purposes other than research
Persons not affiliated to a social security scheme or beneficiaries of a similar scheme
Persons participating in other interventional research with an exclusion period still in progress at pre-inclusion
Patients who received cinacalcet with 3 months prior inclusion

Calcium Isotope Ratios to Assess Calcium Bone Balance in Dialysis Children Receiving Cinacalcet