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Magnesium Neonatal Intoxication: A Case ReviewMagnesium Sulfate is currently the treatment of choice for severe preeclampsia and eclampsia. Since it crosses the placenta, magnesium can reach high levels in fetal plasma, ocassionally reaching levels higher than maternal plasma. Objective: To analyze a 35 weeks gestational age newborn, who presented hypermagnesemia due to maternal treatment with magnesium sulfate (in routine dosage) indicated for severe preeclampsia. Clinical Case: The mother was infused with MgSO4 for 17 hours until pregnancy was interrupted because of fetal monitoring. The baby weighed 2,620 grams, was depressed, hypotonic, cyanotic and without respiratory effort and only partially responded to initial resucitation with positive pressure ventilation. The infant was admitted to the Neonatal Intensive Care Unit for monitoring, support and management. High levels of plasma MgSO4 were found (4.7 mg/dl), compatible with the diagnosis of hypermagnesemia. Symptoms and signs slowly disappeared, and the child was discharged after 10 days of hospitalization. Conclusion: We present the clinical case of a newborn with a history of maternal use of magnesium sulfate, who presented hypermagnesemia characterized by neonatal depression, hypotonia, central apnea with oxygen requirement and who progressively normalized in a 10 day period. RESUMENEl Sulfato de Magnesio es actualmente el medicamento de elección para el tratamiento de la embarazada con preeclampsia severa y eclampsia. Dado que atraviesa la placenta, alcanza elevados niveles en el plasma fetal, pudiendo en ocasiones superar la concentración plasmática materna. Objetivo: Analizar la evolución de un neonato de 36 semanas de edad gestacional que cursó con cuadro de hipermagnesemia secundario a tratamiento materno con sulfato de magnesio en dosis habituales, indicado como terapia de una
Diabetes Insipidus in Pediatrics Introduction: Diabetes insipidus (DI) is a syndrome characterized by polyuria and polydipsia secondary to a decreased secretion or action of the antidiuretic hormone (ADH). An early diagnosis is essential. Diagnosis is made by measuring plasma and urinary osmolarity and their changes under water deprivation and after DDAVP administration. Objective: To describe the clinical, radiological characteristics as well as the initial treatment of eight children with DI, 3 of them nephrogenic DI (DIN) and 5 with central DI. Methods: A Retrospective, descriptive study in DI patients under control at the Catholic University of Chile and Sotero del Rio Hospital between 1998-2008 is presented. Clinical files were evaluated collecting clinical, epidemiologic, biochemical and image data. Serum (Sosm) and urinary osmolarity (Uosm) were registered. DI was diagnosed with a Sosm > 300 and Usm < 600 mOsm/L. Central DI was defined as the inability to reach a Uosm > 600 or a 50%-increase after DDAVP treatment. Otherwise DI was classified as DIN. Results: Eight patients (5 males) were studied. Chief complaints were polydipsia/polyuria (5/8), hyperthermia (2/8), and failure to grow (1/8). MRI showed endocraneal lesion in all patients with Central DI. All of these utilized oral or inhalatory DDAVP treatment. Patients with Nephrogenic DI were trated with Hydrochlrothiazide. Conclusion: Polydipsia, polyuria, hyperthermia with hypernatremia are suggestive of DI in the first year of life. Water deprivation test is diagnostic in differentiating Central and Nephrogenic DI. MRI is an essential diagnostic tool in CDI. Manegement should be multidisciplinary, including a pediatician, nephrologist, endocrinologist and nutricionist.
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