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Phosphocalcic metabolism after biliopancreatic diversion
O Lozano1, J D García-Díaz, E Cancer
1Department of Surgery, Alcalá de Henares University, Príncipe de Asturias Hospital, Madrid, Spain.
Obesity Surgery
|July 31, 2007
Summary
Morbid obesity surgery, like biliopancreatic diversion (BPD), often leads to secondary hyperparathyroidism due to vitamin D malabsorption. Early recognition and treatment are crucial for managing phosphocalcic metabolism post-surgery.
Area of Science:
- Endocrinology
- Bariatric Surgery
- Metabolic Disorders
Background:
- Malabsorptive bariatric surgeries can cause significant phosphocalcic metabolism disturbances.
- Understanding preoperative metabolic status is key to managing post-surgical changes.
Purpose of the Study:
- To prospectively evaluate phosphocalcic metabolism alterations after biliopancreatic diversion (BPD).
- To identify risk factors and long-term changes in parathyroid hormone (PTH) and vitamin D levels.
Main Methods:
- Prospective study of 61 morbidly obese patients undergoing BPD.
- Analysis of preoperative and postoperative calcium, phosphorus, 25-hydroxyvitamin D, and PTH levels.
- Long-term follow-up (minimum 4 years) including urinary markers.
Main Results:
- Pre-BPD, 42.3% had elevated PTH and 54% decreased 25-hydroxyvitamin D.
- Post-BPD, 81.8% of initially hyperparathyroid patients remained so; 60% of normal PTH patients developed hyperparathyroidism.
- No correlation found between PTH levels and body mass index.
Conclusions:
- Morbid obesity itself is associated with high rates of hyperparathyroidism.
- BPD causes vitamin D malabsorption, contributing to persistent or new-onset hyperparathyroidism.
- Effective management of secondary hyperparathyroidism and phosphocalcic metabolism is essential post-BPD.
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