Template:Estimating pneumothorax size: Difference between revisions
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[[File:Pneumothorax measurement.jpg|thumb|Measuring pneumothoraxes. Line A = lung apex to cupola. Line B = interpleural distance.]] | [[File:Pneumothorax measurement.jpg|thumb|Measuring pneumothoraxes. Line A = lung apex to cupola. Line B = interpleural distance.]] | ||
*On a conventional, upright posterior-anterior chest radiograph: | *On a conventional, upright posterior-anterior chest radiograph: | ||
**Very small: <1 cm interpleural distance (confined to upper 1/3 of chest) OR only seen on CT | **''Very'' small: <1 cm interpleural distance (confined to upper 1/3 of chest) OR only seen on CT | ||
**Small: ≤3cm lung apex to cupola (chest wall apex) on CXR | **Small: ≤3cm lung apex to cupola (chest wall apex) on CXR | ||
**Large: >3cm lung apex to cupola (chest wall apex) on CXR | **Large: >3cm lung apex to cupola (chest wall apex) on CXR | ||
Latest revision as of 02:56, 14 May 2015
Estimating Pneumothorax Size
- On a conventional, upright posterior-anterior chest radiograph:
- Very small: <1 cm interpleural distance (confined to upper 1/3 of chest) OR only seen on CT
- Small: ≤3cm lung apex to cupola (chest wall apex) on CXR
- Large: >3cm lung apex to cupola (chest wall apex) on CXR
- 3cm apex to cupola measurement is roughly equivalent to 2cm interpleural distance (at the level of the hilum)
- Both roughly correlate with a 50% pneumothorax by volume