title: Efficacy of manual aspiration immediately after complicated pneumothorax in CT-guided lung biopsy.
abstract: OBJECTIVE
  The goal of this study was to evaluate the efficacy of simple aspiration of air from the pleural space to prevent increased pneumothorax and avoid chest tube placement in cases of pneumothorax after computed tomography (CT)-guided lung biopsy.
  
  
  METHODS
  This retrospective study was based on experience with 283 consecutive percutaneous needle lung biopsies with real-time CT fluoroscopic guidance. While patients were on the CT scanner table, percutaneous manual aspiration was performed in all those with moderate or large pneumothorax demonstrated on postbiopsy chest CT images regardless of symptoms. The authors evaluated the frequency of biopsy-induced pneumothorax, management of each such case, and factors that influenced the incidence of worsening pneumothorax that required chest tube placement despite manual aspiration.
  
  
  RESULTS
  Of the 104 (36.7%) pneumothoraces occurring after 283 biopsy procedures, 52 were treated with manual aspiration immediately after biopsy. In 95 of the 104 pneumothoraces (91.3%), the pneumothorax had resolved completely on follow-up chest radiographs without chest tube placement. Only nine patients (3.2% of the entire series; 8.7% of those who developed pneumothorax) required chest tube placement. Requirement of chest tube insertion significantly increased parallel to the increased volume of aspirated air. The optimal cutoff level of aspirated air on which to base a decision to abandon manual aspiration alone and resort to chest tube placement was 543 mL.
  
  
  CONCLUSIONS
  Percutaneous manual aspiration of biopsy-induced pneumothorax performed immediately after biopsy may prevent progressive pneumothorax and eliminate the need for chest tube placement. However, in cases in which the amount of aspirated air is large (such as more than 543 mL in this study), the possibility of required chest tube placement increases.
authors.affiliation: Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Chyo, Kawaramachi-Hirokoji, Kamigyo, Kyoto 602-8566, Japan. yamagami@koto.kpu-m.ac.jp
authors.forename: Takuji
authors.initials: T
authors.lastname: Yamagami
authors.forename: Takeharu
authors.initials: T
authors.lastname: Kato
authors.forename: Shigeharu
authors.initials: S
authors.lastname: Iida
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Hirota
authors.forename: Rika
authors.initials: R
authors.lastname: Yoshimatsu
authors.forename: Tsunehiko
authors.initials: T
authors.lastname: Nishimura
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000388:Air; D001707:Biopsy, Needle / Q000009:adverse effects*; D002404:Catheterization / Q000295:instrumentation; D015505:Chest Tubes; D003657:Decision Making; D005260:Female; D005471:Fluoroscopy; D005500:Follow-Up Studies; D006801:Humans; D008168:Lung / Q000473:pathology*; D008171:Lung Diseases / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011030:Pneumothorax / Q000209:etiology / Q000517:prevention & control*; D015641:Radiography, Interventional; D013902:Radiography, Thoracic; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013396:Suction / Q000295:instrumentation / Q000379:methods*; D014057:Tomography, X-Ray Computed