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Congenital Diaphragmatic Hernia & Eventration Of Diaphragm. Dr.V.N.Mahalakshmi. Development of diaphragm. Tissues of origin Septum transversum Esophageal mesentry Mesoderm from body wall Lumbar somites. Development of diaphragm. Pathology of CDH.
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Congenital Diaphragmatic Hernia & Eventration Of Diaphragm Dr.V.N.Mahalakshmi
Development of diaphragm Tissues of origin • Septum transversum • Esophageal mesentry • Mesoderm from body wall • Lumbar somites
Pathology of CDH • Failure of closure of pleuro-peritoneal canal • Most common area is a postero-lateral defect ( Bochdalek ) • Left side more common
Pathology of CDH • Diaphragmatic defect • Abdominal viscera fill the chest cavity • Abdomen small & poorly developed
Pathology of CDH • Both lungs hypoplastic • More so on the ipsilateral side • Pulmonary vessels hypoplastic PPHN
Pathology of CDH Following delivery • Bowels fill with air • Compression of ipsilateral lung • Mediastinal shift • Compression of contralateral lung mechanical compression of lung
Pathology of CDH Lung hypoplasia PPHN Mechanical compression Respiratory distress
Lung development in CDH • No. of bronchial branches – greatly reduced • Alveolar development severely affected • Increased muscle mass in the conducting airways • Seen in contra lateral lung too
Pulmonary vasculature in CDH • Reduction in the total no. of branches • Both in ipsilateral and contra lateral lungs • Significant adventitial and medial wall thickening • Increased susceptibility to PPH • hypoxia, acidosis, hypothermia, stress
Persistent fetal circulation Respiratory failure
Diagnosis • CXR diagnostic • Absence of diaphragm • Scaphoid abdomen • Bowel loops in chest • Mediastinal shift
Problems Hypoxia Respiratory distress Metabolic acidosis Hypercarbia
Treatment Initial goal • Stabilisation of respiration • Treatment of PPHN
Treatment • Oxygenation & mechanical ventilation • Correction of PPHN (NO / Vasodilators ) • Correction of metabolic acidosis
Treatment • Surgical repair of the defect • Abdominal approach • Post-op ventilation
Newer advances in therapy • In utero repair • PLUG therapy • ECMO
Prenatal diagnosis USG @ 16 weeks • Herniated viscera in the chest • Mediastinal shift to opposite side • Stomach in the chest Associated anomalies 40%
Hernia of Morgagni • Antero-medial defect • Para-esophageal • Lucencies in mediastinum • Respiratory distress • Surgical correction
Pathology Attenuation of central muscular portion of diaphragm Phrenic nerve damage Idiopathic ( birth injury )
Clinical presentation Similar to CDH • Respiratory distress @ birth • Recurrent respiratory tract infections in infancy
Chest X - Ray • Elevated thinned out diaphragm • Bowel loops in chest • Mediastinal shift
Treatment • Surgical repair of the defect • Abdominal approach