Position patient upright (ideal) + scan the back, lateral region, and anterior chest with curvilinear probe set to abdominal preset.
Back scan: place probe just below scapula and find diaphragm. Then move probe slightly towards the head.
Fan probe on that rib space to ensure pleural lines are horizontal/crisp and analyze for B lines (vertical lines extending all the way down screen). Look throughout both lungs in all lung fields to get full assessment.
Positive Scan for B lines:
Three B lines in any given rib space is positive.
Multiple B lines bilaterally is suspicious for pulmonary edema.
Note: B lines themselves are very non-specific and are seen in many lung pathologies.
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