Parathyroid autotransplantation during thyroidectomy: documentation of graft function

Area of Science:

• Endocrinology
• Surgical Oncology
• Biochemistry

Background:

• Thyroidectomy can lead to inadvertent parathyroid gland removal or devascularization.
• Postoperative hypocalcemia is a common complication following thyroid surgery.
• Preserving parathyroid function is crucial for patient outcomes.

Purpose of the Study:

• To document the biochemical function of normal parathyroid tissue grafted during thyroidectomy.
• To evaluate the efficacy of parathyroid autotransplantation in preserving parathyroid function.
• To assess the impact of parathyroid autotransplantation on preventing postoperative hypocalcemia.

Main Methods:

• An intervention study involving reimplantation of devascularized or inadvertently removed parathyroid glands into forearm muscle pockets during thyroidectomy.
• Postoperative serum parathyroid hormone levels were measured via venous sampling from both forearms at multiple time points (days 1, 3, 14, 28, 56, and 84).
• The study was conducted at a tertiary care teaching hospital, including seven patients at risk for postoperative hypocalcemia.

Main Results:

• A 1.5-fold gradient of parathyroid hormone levels between grafted and non-grafted arms was observed in all patients by postoperative day 28.
• Maximal parathyroid hormone gradient was achieved on postoperative day 56.
• Biochemical function of the grafted parathyroid glands persisted in 6 out of 7 patients by postoperative day 84.

Conclusions:

• Parathyroid autotransplantation during thyroidectomy objectively demonstrates preserved biochemical function of the grafted parathyroid glands.
• Parathyroid autotransplantation is a viable strategy to maintain parathyroid function for glands inadvertently removed or devascularized during thyroid surgery.
• This technique may reduce the incidence and severity of postoperative hypocalcemia.