POST-THYROIDECTOMY HYPOCALCEMIA IN PAKISTAN: A REVIEW OF PATHOPHYSIOLOGY, PREVENTIVE APPROACHES, AND MANAGEMENT STRATEGIES FOR HEAD AND NECK SURGEONS

Abstract

Background: Hypocalcemia following thyroid surgery, most often a sign of temporary or permanent hypoparathyroidism, is the leading metabolic complication of bilateral thyroidectomy and central neck dissection. Transient hypocalcemia is reported in 10%-47.8% of patients, and permanent parathyroid dysfunction in 0.5%-10.7%.

Objective: To consolidate current evidence on the pathophysiology, epidemiology, prevention, early risk stratification, and acute and long-term management of post-thyroidectomy hypocalcemia, and to offer surgeons a practical framework for care.

Methods: A narrative review of the published literature, with findings extracted and organized by theme.

Results: The principal mechanisms are parathyroid devascularization, mechanical or thermal injury, and inadvertent excision. Risk is increased by female sex, younger age, autoimmune thyroid disease, total thyroidectomy, central neck dissection, reoperative surgery, and prior neck irradiation. Preventive measures include preoperative vitamin D and calcium optimization, careful parathyroid-preserving technique, selective autotransplantation, and the use of intraoperative and early postoperative parathyroid hormone (PTH) measurements. PTH-based risk stratification algorithms allow safe early discharge while limiting symptomatic hypocalcemia. Stepwise approaches are outlined for oral and intravenous treatment of acute hypocalcemia and for the long-term care of permanent hypoparathyroidism.

Conclusions: Emerging technologies, including near-infrared autofluorescence, indocyanine green angiography, deep learning-assisted parathyroid identification, and novel PTH replacement therapies, show promise for further reducing complications and improving quality of life after thyroidectomy.