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Hypocalcemia, hypomagnesemia, and transient hypoparathyroidism during therapy with potassium phosphate in diabetic
Insights
Intravenous potassium phosphate in treating diabetic ketoacidosis may worsen hypocalcemia. This treatment can lead to low calcium and magnesium levels, potentially causing complications.
Area of Science:
- Pediatrics
- Endocrinology
- Nephrology
Background:
- Diabetic ketoacidosis (DKA) is a serious complication of diabetes.
- Phosphate replacement is crucial in DKA management.
- The specific effects of potassium phosphate on electrolyte balance in pediatric DKA are not fully understood.
Purpose of the Study:
- To investigate the effects of intravenous potassium phosphate on serum calcium and magnesium levels in children with diabetic ketoacidosis.
- To explore potential mechanisms linking potassium phosphate administration to electrolyte disturbances.
Main Methods:
- Nine pediatric patients with DKA received intravenous fluids containing potassium phosphate.
- Serum phosphorus, calcium, magnesium, and intact parathyroid hormone levels were monitored.
- Clinical symptoms related to electrolyte imbalances were recorded.
Main Results:
- All patients maintained normal serum phosphorus levels during phosphate infusion.
- Transient hypocalcemia was observed in six patients (67%).
- Transient hypomagnesemia occurred in five patients (56%).
- One patient experienced carpopedal spasms, requiring magnesium sulfate treatment.
- Low intact parathyroid hormone levels were noted in three patients during hypocalcemia, suggesting transient hypoparathyroidism.
Conclusions:
- Intravenous potassium phosphate, when used as the sole potassium source in DKA treatment, may potentiate hypocalcemia.
- Potential mechanisms include effects on parathyroid hormone secretion and magnesium levels.
- Careful monitoring of calcium and magnesium is essential during potassium phosphate therapy in pediatric DKA.
Abstract:
The effects of intravenous administration of potassium phosphate in the treatment of diabetic ketoacidosis were studied in nine children, ages 9 9/12 to 17 10/12 yr. During phosphate infusion (20--40 meq/L of fluid), all children maintained normal serum concentrations of phosphorus. Transient hypocalcemia occurred in six and transient hypomagnesemia in five patients. One child developed carpopedal spasms refractory to intravenous infusion of calcium gluconate but responsive to intramuscular injection of magnesium sulfate. In three patients, serum levels of intact parathyroid hormone were low at the time of hypocalcemia, an observation that suggests transient hypoparathyroidism. This study indicates that the use of potassium phosphate as the sole source of potassium replacement might potentiate ketoacidosis-induced hypocalcemia through multiple mechanisms.