pituitrin and Jaundice

Neonatal hyponatraemia is common, and related to significant morbidity and mortality. We report a case of a preterm newborn (gestational age of 36 weeks) with hyponatraemia, and with a prenatal diagnosis of cleft lip and palate, with a normal fetal karyotype. On the seventh day of life, a biochemical evaluation for jaundice and mild signs of dehydration showed hyponatraemia of 124 mmol/L. Investigation showed normal adrenal and thyroid functions, plasma hyposmolality (258 mOsm/kg); high urinary sodium (73 mmol/L) and high urinary osmolality (165 mOsm/kg). Despite oral sodium supplementation and fludrocortisone treatment, sodium levels remained between 124 and 130 mmol/L. Cranial ultrasound, brain MRI and renal ultrasound were normal. The diagnosis of hyponatraemia was unpredicted and the investigation was suggestive of reset osmostat, a subtype of the syndrome of inappropriate secretion of antidiuretic hormone, characterised by a subnormal threshold for antidiuretic hormone secretion.

Topics: Anti-Inflammatory Agents; Dehydration; Fludrocortisone; Humans; Hyponatremia; Inappropriate ADH Syndrome; Infant, Newborn; Jaundice; Magnetic Resonance Imaging; Male; Osmolar Concentration; Premature Birth; Sodium; Vasopressins

Topics: Adult; Anemia, Hemolytic, Autoimmune; Carbamazepine; Diabetes Insipidus; Female; Humans; Jaundice; Vasopressins

Topics: Adolescent; Anemia; Appendectomy; Appendicitis; Blood Chemical Analysis; Child; Colonic Diseases; Hernia, Inguinal; Humans; Hypersplenism; Infant; Intestinal Obstruction; Intussusception; Jaundice; Jaundice, Obstructive; Megacolon; Osteomyelitis; Sinusitis; Surgical Procedures, Operative; Thrombosis; Vasopressins; Wilms Tumor