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NEONATAL HYPOCALCEMIA
TYPES OF NEONATAL HYPOCALCEMIA
 The early onset hypocalcemia:
presents within 72 h requires treatment with
calcium supplementation for at least 72 h.
 late onset hypocalcemia:
usually presents after 7 days and requires
longer term therapy.
BODY CALCIUM EXISTS IN TWO MAJOR
COMPARTMENTS:
1. Skeleton (99%).
2. ECF (1%) :
(a) bound to albumin (40%)
(b) bound to anions like phosphorus, citrate,
sulfate and lactate (10%)
(c) free ionized form (50%)
DEFINITION
Hypocalcemia is defined as total serum
calcium of less than 7 mg/dL (1.75 mmol/L) or
ionized calcium less than 4 mg/dL (1 mmol/L)
in preterm infants and less than 8 mg/dL
(2 mmol/L; total) or <1.2 mmol/L (ionic)
CAUSES OF EARLY ONSET HYPOCALCEMIA
• Prematurity
• Preeclampsia
• Infant of Diabetic mother
• Perinatal stress/ asphyxia
• Maternal intake of anticonvulsants
(phenobarbitone,
phenytoin sodium)
• Maternal hyperparathyroidism
• Iatrogenic (alkalosis, use of blood products,
diuretics, phototherapy, lipid infusions etc)
MANAGEMENT OF EARLY NEONATAL
HYPOCALCEMIA
MANAGEMENT OF EARLY NEONATAL
HYPOCALCEMIA
LATE ONSET NEONATAL HYPOCALCEMIA (LNH)
presents at the end of the first wk of life. It is usually
symptomatic in the form of neonatal tetany or
seizures.
This is usually caused by high phosphate intake
(iatrogenic).
If hypocalcemia is present with hyperphosphatemia
and a normal renal function, hypoparathyroidism
should be strongly suspected
CAUSES OF LATE ONSET HYPOCALCEMIA
• Increased phosphate load
Cow milk, renal insufficiency
• Hypomagnesemia
• Vitamin D deficiency
Maternal vitamin D deficiency
Malabsorption
Renal insufficiency
Hepatobiliary disease
• PTH resistence
Transient neonatal pseudohypoparathyroidism
• Hypoparathyroidism
Primary
Hypoplasia, aplasia of parathyroid glands - (Di
George’s syndrome), CATCH 22 syndrome
(cardiac anomaly, abnormal facies, thymic
aplasia, cleft palate, hypocalcaemia
with deletion on chromosome 22)
Activating mutations of the calcium sensing
receptor (CSR)
Secondary
Maternal hyperparathyroidism
• Metabolic Syndromes
Kenny-caffey syndrome
Long-chain fatty acyl CoA dehydrogenase
deficiency
Kearns-sayre syndrome
• Iatrogenic
Citrated blood products
Lipid infusions
Bicrbonate therepy
Diueretics (loop diuretics0
Glucocorticosteriods
Phosphate therepy
Alkalosis
Phototherapy
Neonatal hypocalcemia

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Neonatal hypocalcemia

  • 2. TYPES OF NEONATAL HYPOCALCEMIA  The early onset hypocalcemia: presents within 72 h requires treatment with calcium supplementation for at least 72 h.  late onset hypocalcemia: usually presents after 7 days and requires longer term therapy.
  • 3. BODY CALCIUM EXISTS IN TWO MAJOR COMPARTMENTS: 1. Skeleton (99%). 2. ECF (1%) : (a) bound to albumin (40%) (b) bound to anions like phosphorus, citrate, sulfate and lactate (10%) (c) free ionized form (50%)
  • 4. DEFINITION Hypocalcemia is defined as total serum calcium of less than 7 mg/dL (1.75 mmol/L) or ionized calcium less than 4 mg/dL (1 mmol/L) in preterm infants and less than 8 mg/dL (2 mmol/L; total) or <1.2 mmol/L (ionic)
  • 5. CAUSES OF EARLY ONSET HYPOCALCEMIA • Prematurity • Preeclampsia • Infant of Diabetic mother • Perinatal stress/ asphyxia • Maternal intake of anticonvulsants (phenobarbitone, phenytoin sodium) • Maternal hyperparathyroidism • Iatrogenic (alkalosis, use of blood products, diuretics, phototherapy, lipid infusions etc)
  • 6. MANAGEMENT OF EARLY NEONATAL HYPOCALCEMIA
  • 7. MANAGEMENT OF EARLY NEONATAL HYPOCALCEMIA
  • 8. LATE ONSET NEONATAL HYPOCALCEMIA (LNH) presents at the end of the first wk of life. It is usually symptomatic in the form of neonatal tetany or seizures. This is usually caused by high phosphate intake (iatrogenic). If hypocalcemia is present with hyperphosphatemia and a normal renal function, hypoparathyroidism should be strongly suspected
  • 9. CAUSES OF LATE ONSET HYPOCALCEMIA • Increased phosphate load Cow milk, renal insufficiency • Hypomagnesemia • Vitamin D deficiency Maternal vitamin D deficiency Malabsorption Renal insufficiency Hepatobiliary disease • PTH resistence Transient neonatal pseudohypoparathyroidism • Hypoparathyroidism Primary Hypoplasia, aplasia of parathyroid glands - (Di George’s syndrome), CATCH 22 syndrome (cardiac anomaly, abnormal facies, thymic aplasia, cleft palate, hypocalcaemia with deletion on chromosome 22) Activating mutations of the calcium sensing receptor (CSR) Secondary Maternal hyperparathyroidism • Metabolic Syndromes Kenny-caffey syndrome Long-chain fatty acyl CoA dehydrogenase deficiency Kearns-sayre syndrome • Iatrogenic Citrated blood products Lipid infusions Bicrbonate therepy Diueretics (loop diuretics0 Glucocorticosteriods Phosphate therepy Alkalosis Phototherapy