title: Spontaneous pneumothorax: marker gas technique for predicting outcome of manual aspiration.
abstract: OBJECTIVE
  To determine whether in a patient with spontaneous pneumothorax the presence or absence of a pleural leak can be shown at the time of manual aspiration by use of a marker gas. Also, to find out if the technique can predict whether manual aspiration will be successful, hence avoiding the need for intercostal tube drainage.
  
  
  METHODS
  Prospective study of 25 episodes of pneumothorax during which patients breathed air from a Douglas bag that contained chlorofluorocarbon gases from a metered dose inhaler while the pneumothorax was aspirated.
  
  
  METHODS
  Medical unit of a district general hospital.
  
  
  METHODS
  22 patients who presented over nine months with acute pneumothorax.
  
  
  METHODS
  Presence or absence of chlorofluorocarbon marker gases in the aspirate. Presence or absence of sustained re-expansion of the affected lung in the chest radiograph.
  
  
  RESULTS
  Marker gas was detected in the aspirate from 16 out of 25 pneumothoraces. Of these, 13 required intercostal tube drainage because of failure of the lung to re-expand. Marker gas was not detected in nine cases, and in all of these cases manual aspiration resulted in sustained re-expansion of the lung.
  
  
  CONCLUSIONS
  The presence or absence of a pleural leak during manual aspiration of spontaneous pneumothorax can be shown by using this technique. The absence of marker gas in the aspirate implies that manual aspiration will be successful, whereas its presence predicts, in most cases, either failure of manual aspiration to expand the lung or early re-collapse of the lung.
authors.affiliation: Department of Thoracic Medicine, Ipswich Hospital, Suffolk.
authors.forename: D
authors.initials: D
authors.lastname: Seaton
authors.forename: K
authors.initials: K
authors.lastname: Yoganathan
authors.forename: T
authors.initials: T
authors.lastname: Coady
authors.forename: R
authors.initials: R
authors.lastname: Barker
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004322:Drainage; D005260:Female; D005410:Flame Ionization; D006801:Humans; D006843:Hydrocarbons, Chlorinated; D006845:Hydrocarbons, Fluorinated; D008297:Male; D008875:Middle Aged; D011030:Pneumothorax / Q000628:therapy*; D011379:Prognosis; D011446:Prospective Studies; D013396:Suction
chemical_list: D006843:Hydrocarbons, Chlorinated; D006845:Hydrocarbons, Fluorinated