Table 1 Summary of the biochemical variables analyzed
Definition | Symbol | Description | Unit | Formula |
|---|---|---|---|---|
Preoperative calcium | CaPreop | Serum calcium one day before surgery | mmol/l | – |
Preoperative Phosphorus | – | Serum phosphorus one day before surgery | mmol/l | – |
Preoperative PTH | PTHPreop | Serum PTH one day before surgery | pg/ml | – |
Intraoperative PTH before resection | PTHiPreop | Serum PTH after adenoma dissection and prior to removal | pg/ml | – |
Intraoperative PTH after resection | PTHiPostop | Serum PTH 10 min postexcision | pg/ml | – |
Intraoperative PTH decrease | DPTHi | PTH decrease from just before removal to 10 min postexcision | % | (PTHiPostop—PTHiPreop) / PTHiPreop × 100% |
Postoperative calcium | CaPostop | Serum calcium on the 1st postoperative day | mmol/l | – |
Postoperative PTH | PTHPostop | Serum PTH on the 1st postoperative day | pg/ml | – |
Calcium decrease | DCa | Calcium decrease from the day before surgery to the 1st postop. day | % | (CaPostop—CaPreop) / CaPreop × 100% |
PTH decrease | DPTH | PTH decrease from the day before surgery to the 1st postop. day | % | (PTHPostop—PTHPreop) / PTHPreop × 100% |