title: Mask physiotherapy in patients after heart surgery: a controlled study.
abstract: OBJECTIVE
  Investigate the effects of mask physiotherapy on post-operative complications after thoracic surgery.
  
  
  METHODS
  A prospective, consecutive, randomized, controlled study.
  
  
  METHODS
  Department of Thoracic and Heart Surgery at a University Hospital. The treatments were performed by experienced and specially trained physiotherapists.
  
  
  METHODS
  97 low-risk male patients undergoing coronary artery by-pass graft surgery were evaluated. 66 patients completed the study.
  
  
  METHODS
  The patients were treated with routine chest physiotherapy alone or supplied with either positive expiratory pressure (PEP), or inspiratory resistance-positive expiratory pressure (IR-PEP).
  
  
  RESULTS
  Post-operative pulmonary complications were assessed by forced vital capacity (FVC), arterial oxygen tension (PaO2), and chest X-ray examination, all measured pre-operatively and on the third and sixth post-operative day. There was an almost equal decrease and subsequent rise in spirometric and blood gas values, but patients treated with the PEP mask had a borderly significantly higher increase in PaO2 from day 3 to day 6 compared with patients treated with no mask. There was an almost equal frequency of atelectasis in the 3 treatments. The patients filled in a questionaire expressing their opinion about their treatment. Most patients liked their treatment and found it helpful but a little less so in the IR-PEP group.
  
  
  CONCLUSIONS
  We did not find any significant difference between the three groups; however, a tendency to decreased risk of having post-operative complications was observed in the groups having positive expiratory pressure (PEP) and inspiratory resistance-positive expiratory pressure (IR-PEP).
authors.affiliation: Department of Pulmonary Diseases, Gentofte Hospital, University of Copenhagen, Denmark
authors.forename: K
authors.initials: K
authors.lastname: Richter Larsen
authors.forename: U
authors.initials: U
authors.lastname: Ingwersen
authors.forename: S
authors.initials: S
authors.lastname: Thode
authors.forename: S
authors.initials: S
authors.lastname: Jakobsen
mesh_terms: D000368:Aged; D001784:Blood Gas Analysis; D001026:Coronary Artery Bypass; D006801:Humans; D008297:Male; D008397:Masks; D008875:Middle Aged; D010313:Partial Pressure; D011175:Positive-Pressure Respiration / Q000379:methods*; D011183:Postoperative Complications / Q000517:prevention & control*; D011446:Prospective Studies; D001261:Pulmonary Atelectasis / Q000517:prevention & control*; D014797:Vital Capacity