However, the 10% tea tree oil cream doesn't seem to cure the infection. A stronger tea tree oil solution (25% or 50%) is needed for that. Application of 25% or 50% tea tree oil solution appears to both relieve symptoms and clear up the infection in about half of people who try it for 4 weeks.
Vital capacity (VC): the volume change of the lung between a full inspiration and a maximal expiration. 1. The maneuver is performed rather slowly. The vital capacity is assessed during an inspiratory maneuver. Starting from end-tidal volume the subject expires maximally and subsequently makes a full inspiration.
Normal tidal volume is 6-8 cc/kg. Normal vital capacity is 60 cc/kg +/- 20% (i.e. 10-fold increase of TV), and is correlated with the ability to cough and take deep breaths. Inspiratory capacity (IC, the maximal volume inspired from FRC) is one of the only tests that can detect extrathoracic airway obstruction.