Iranian Journal of Otorhinolaryngology

Iranian Journal of Otorhinolaryngology

Preoperative Vitamin.D Status and Post-Total Thyroidectomy Hypocalcemia

Document Type : Original

Authors
Parvin Layegh 1
Zakie Sadat Sajjadi 2
Leila V.Mostaan 3
Masoud Mohebbi 1
Mona Kabiri 4
Mohammad ali Yaghoubi 1
1 Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
2 Department of Otorhinolaryngology, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
3 Cancer Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
4 Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
10.22038/ijorl.2023.75069.3518
Abstract
Introduction:
Hypocalcemia is a common complication of total thyroidectomy (TT). This study was designed to investigate the effect of preoperative vitamin.D (Vit.D) status on the occurrence of post-total thyroidectomy hypocalcemia.
Materials and Methods:
Patients who underwent TT without parathyroidectomy were divided into three groups based on their preoperative Serum Vit.D levels (<20 ng/ml, 20-30 ng/ml, and ≥30 ng/ml were considered deficient, insufficient, and normal Vit.D levels, respectively). Serum levels of calcium and phosphorus were measured before and 24 hours after surgery in all patients. The patients were examined for clinical symptoms and signs of hypocalcemia postoperatively. In cases with positive clinical symptoms and signs of hypocalcemia and/or calcium levels <8 mg/dl, PTH level was measured before starting calcium infusion, while serum calcium and phosphorus levels were also measured 24 hours later.
Results:
Among 100 patients enrolled in this study, 81% were females. The mean age was 36.60±8.32 years. Before surgery, the mean Vit.D level was 26.9±16.89 ng/ml, while 47% of cases had normal Vit.D level, 32% had insufficient vitamin levels, and 21% had Vit.D deficiency. Twenty-four hours after surgery, the calcium (P=0.356) and phosphorus (P=0.743) levels were not significantly different between the three Vit.D groups. A comparison of postoperative PTH levels between the three Vit.D groups showed no significant difference (P=0.596).
Conclusions:
Based on our findings, preoperative serum Vit.D levels did not affect postoperative serum calcium levels.
Keywords
Hypocalcemia
Vitamin.D
Total thyroidectomy
Subjects
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Iranian Journal of Otorhinolaryngology
Volume 36, Issue 1
January and February 2024
Pages 343-348