Assertion: pneumothorax | /r/HasProperty | low
Facets:
value: very
type: DEGREE
Source sentences:
text: It should be noted that in patients with fragile lungs due to lung disease or in cases where air can easily move into a lung segment but may be restricted from coming out (for example, because of a ball-valve effect or partial obstruction from secretions), the amount of positive pressure that may cause a pneumothorax can be very low.