title: Influence of pleural drain insertion in lung function of patients undergoing coronary artery bypass grafting.
abstract: OBJECTIVE
  Longitudinal, prospective, randomized, blinded Trial to assess the influence of pleural drain (non-toxic PVC) site of insertion on lung function and postoperative pain of patients undergoing coronary artery bypass grafting in the first three days post-surgery and immediately after chest tube removal.
  
  
  METHODS
  Thirty six patients scheduled for elective myocardial revascularization with cardiopulmonary bypass (CPB) were randomly allocated into two groups: SX group (subxiphoid) and IC group (intercostal drain). Spirometry, arterial blood gases, and pain tests were recorded.
  
  
  RESULTS
  Thirty one patients were selected, 16 in SX group and 15 in IC group. Postoperative (PO) spirometric values were higher in SX than in IC group (p<0.05), showing less influence of pleural drain location on breathing. PaO(2) on the second PO increased significantly in SX group compared with IC group (p<0.0188). The intensity of pain before and after spirometry was lower in SX group than in IC group (p<0.005). Spirometric values were significantly increased in both groups after chest tube removal.
  
  
  CONCLUSIONS
  Drain with insertion in the subxiphoid region causes less change in lung function and discomfort, allowing better recovery of respiratory parameters.
authors.affiliation: Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais.
authors.forename: Irinea Beatriz Carvalho
authors.initials: IB
authors.lastname: Ozelami Vieira
authors.forename: Fabiano F
authors.initials: FF
authors.lastname: Vieira
authors.forename: João
authors.initials: J
authors.lastname: Abrão
authors.forename: Ada Clarice
authors.initials: AC
authors.lastname: Gastaldi
mesh_terms: D015505:Chest Tubes / Q000009:adverse effects; D001026:Coronary Artery Bypass; D004322:Drainage / Q000295:instrumentation*; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D008297:Male; D008875:Middle Aged; D010994:Pleura; D011182:Postoperative Care / Q000295:instrumentation*; D011446:Prospective Studies; D016037:Single-Blind Method; D013147:Spirometry; D014797:Vital Capacity