4-Hour postoperative PTH level predicts hypocalcemia after thyroidectomy in children

Area of Science:

• Pediatric Endocrinology
• Surgical Oncology
• Endocrine Surgery

Background:

• Hypocalcemia is a common complication following pediatric total thyroidectomy.
• Postoperative parathyroid hormone (PTH) monitoring is established in adults for predicting hypocalcemia.
• The utility of 4-hour postoperative PTH in pediatric patients remains under investigation.

Purpose of the Study:

• To evaluate the effectiveness of the 4-hour postoperative intact parathyroid hormone (PTH) level in guiding calcium supplementation decisions in pediatric patients after total thyroidectomy.

Main Methods:

• Retrospective review of pediatric patients (July 2011-July 2018) undergoing total thyroidectomy.
• Intact PTH levels measured 4 hours postoperatively were used to guide calcium supplementation from November 2014 onwards.
• Concurrent monitoring of serum total and ionized calcium levels, with follow-up in endocrine surgery clinic.

Main Results:

• A 4-hour postoperative PTH level below 10 pg/dL demonstrated 81% sensitivity and 91% specificity for identifying hypocalcemia.
• Patients with low 4-hour PTH levels had significantly higher rates of hypocalcemia (72.7%) and symptomatic hypocalcemia (45.5%).
• No patients with normal 4-hour PTH levels developed symptomatic hypocalcemia or required intravenous calcium.

Conclusions:

• The 4-hour postoperative serum PTH level is a reliable biomarker for predicting hypocalcemia in pediatric thyroidectomy patients.
• Utilizing this biomarker can optimize calcium supplementation protocols, reducing unnecessary interventions and monitoring.
• This approach enhances patient care by minimizing iatrogenic complications and healthcare resource utilization.