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Diaphragmatic Position

 
 
 
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Overview

  • Normal Position

  • The right diaphragm is usually 1cm higher than the left, due to the presence of the liver.

Hemidiaphragmatic Elevation

  • Causes of Diaphragmatic Elevation

  • Reduced lung volume - lobectomy, pneumonectomy, significant atelectasis
  • Diaphragmatic dysfunction - phrenic nerve palsy, diaphragmatic eventration
  • Intraabdominal pathology - ascites, tumour, collection
A pleural effusion can cause apparent hemidiaphragmatic elevation.

Diaphragmatic Flattening

  • Causes of Diaphragmatic Flattening

  • Hyperinflation - emphysema
  • Large pneumothorax
  • Example

  • Diaphragmatic depression secondary to hyperinflation
  • Diaphragmatic depression secondary to hyperinflation
     
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