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Internal Medicine

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Probe location (zone L3): 4th-10th intercostal spaces, between the anterior & posterior axillary lines.

Transducer Type & Placement

Phased Array or Curvilinear

The footprint is perpendicular to the skin with the marker pointing cephalad

Start at the lower edge of zone L3 and slide the transducer cephalad to detect the interface between the diaphragm and pleural space

Structures to be identified

Chest Wall Diaphragm Lung

Pleural effusion Liver or spleen

Sonographic Findings

Anechoic space separating the parietal and visceral pleura Note the lung movement with respiration (Jelly Fish Sign)

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