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Hypocalcemia after thyroidectomy
N Demeester-Mirkine1, L Hooghe, J Van Geertruyden
1Department of Surgery, Brugmann Hospital, Belgium.
Archives of Surgery (Chicago, Ill. : 1960)
|July 1, 1992
Summary
Post-thyroidectomy hypocalcemia is multifactorial, influenced by hemodilution and temporary parathyroid insufficiency. The extent of thyroid resection correlates with the severity and duration of low serum calcium levels.
Area of Science:
- Endocrinology
- Surgical Physiology
- Metabolic Disorders
Background:
- Thyroidectomy is a common surgical procedure.
- Postoperative hypocalcemia is a known complication.
- The exact causes and contributing factors require further elucidation.
Purpose of the Study:
- To systematically analyze serum electrolyte and hormone levels in patients undergoing thyroidectomy.
- To investigate the incidence and severity of hypocalcemia after different extents of thyroid resection.
- To identify factors contributing to post-thyroidectomy hypocalcemia.
Main Methods:
- Systematic survey of serum calcium, electrolytes, proteins, osmolarity, parathyroid hormone, and calcitonin.
- Comparison between 135 thyroidectomized patients and 104 control surgical patients.
- Analysis of hypocalcemia severity and duration based on the extent of thyroid resection.
Main Results:
- Transient hypocalcemia occurred in both thyroidectomized and control groups post-operation.
- Hypocalcemia severity and duration increased with the extent of thyroid resection.
- Profound hypocalcemia and reduced parathyroid hormone levels were observed in 12-22% of thyroidectomized patients.
Conclusions:
- Post-thyroidectomy hypocalcemia is a multifactorial condition.
- Hemodilution and temporary parathyroid insufficiency are significant contributing factors.
- Skeletal avidity for calcium in hyperthyroid patients may exacerbate hypocalcemia.