title: A feasibility and safety study of bronchoscopic thermal vapor ablation: a novel emphysema therapy.
abstract: OBJECTIVE
  This study reports the feasibility and safety of novel second-generation bronchoscopic lung volume reduction (LVR) technology, independent of collateral ventilation.
  
  
  METHODS
  Eleven patients with severe heterogeneous emphysema underwent unilateral bronchoscopic application of vapor thermal energy (mean 4.9 cal/g alveolar tissue; range, 3 to 7.5) with bronchial thermal vapor ablation (BTVA) aiming to induce a controlled inflammatory airway and parenchymal response with resultant LVR.
  
  
  RESULTS
  Nine women and 2 men, with a mean age of 61 years, forced expiratory volume in 1 second (FEV(1)) of 0.77 +/- 0.17 L (32% predicted), residual volume (RV) of 4.1 +/- 0.9 L (219% predicted), and gas transfer of 7.8 +/- 2.2 (34% predicted), underwent unilateral upper lobe treatments. Serious adverse events in 5 included probable bacterial pneumonia and exacerbations of airways disease in 2. Although no important FEV(1) or RV changes occurred during 6 months of follow-up, gas transfer improved, 16% to 9.0% +/- 2.1% (38% predicted), the Medical Research Council Dyspnoea Score improved from 2.6 to 2.1, and the St. George Respiratory Questionnaire Total Score improved from 64.4 at baseline to 49.1.
  
  
  CONCLUSIONS
  These preliminary data on unilateral BTVA therapy confirm feasibility, an acceptable safety profile, and the potential for efficacy.
authors.affiliation: Alfred Hospital and Monash University, Melbourne, NSW 3004, Australia. g.snell@alfred.org.au
authors.forename: Gregory I
authors.initials: GI
authors.lastname: Snell
authors.forename: Peter
authors.initials: P
authors.lastname: Hopkins
authors.forename: Glen
authors.initials: G
authors.lastname: Westall
authors.forename: Lynda
authors.initials: L
authors.lastname: Holsworth
authors.forename: Anne
authors.initials: A
authors.lastname: Carle
authors.forename: Trevor J
authors.initials: TJ
authors.lastname: Williams
mesh_terms: D055011:Ablation Techniques / Q000295:instrumentation*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001999:Bronchoscopy / Q000379:methods*; D004867:Equipment Design; D005240:Feasibility Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000601:surgery*; D013227:Steam; D011795:Surveys and Questionnaires; D016896:Treatment Outcome
chemical_list: D013227:Steam