Assertion: pneumothorax | /r/HasProperty | cubed
Facets:
Source sentences:
text: Calculate the ratio of the transverse radius of the pneumothorax (cubed) to the transverse radius of the hemithorax (cubed); to express the pneumothorax size as a percentage, multiply the fractional size by 100 (this formula assumes a constant shape of the lung when it collapses and is invalid if pleural adhesions are present); the ratio of lung size to hemithorax size to estimate pneumothorax size avoids the subjective underestimation of pneumothorax expressed as a percentage of previous lung volume