title: The effects of drainage with a Redon versus a conventional drain on postoperative pain and blood loss after valve replacements.
abstract: OBJECTIVE
  The aim of this study was to assess the influence of drainage with a Redon drain versus a conventional drain on postoperative pain and blood loss after valve replacements.
  
  
  METHODS
  After approval by the local Ethics Committee and written informed consent, 30 patients, 20-60 years of age, scheduled for first elective valve replacement were included. After standardized anaesthetic regimens, cardiopulmonary bypass and coagulation therapy procedures and at the end of the operation, the patients were randomly assigned to 1 of 2 groups: (GI, n=15): drainage with 4 Redon drains; (GII, n=15): drainage with 2 conventional drains. Postoperative pain intensity at rest (VAS-R), during coughing and mobilization (VAS-M) in bed was independently evaluated using a visual analogue scale (VAS 100 mm) at 6 hourly intervals until 48 h after admission to the ICU (Ho). All patients received 2 g of paracetamol after obtaining the VAS score (8 g/24 h). No other analgesic agents were used. All patients were submitted to 2D echocardiography to verify the presence of pericardial effusion 24 h after surgery. Values are expressed as means. Pearson's chi squared and ANOVA (for repeated measurements) were used for statistical analysis. P<0.05 was considered significant.
  
  
  RESULTS
  There was no statistically significant difference in the mean postoperative VAS-R and VAS-M, and in the mean postoperative total blood drainage 822.3 ml in GI, versus 704.3 ml in GII. Non pericardial effusion was found, and we did not see side-effects in any of the patients.
  
  
  CONCLUSIONS
  We have shown that drainage with a Redon drains versus a conventional drain does not influence postoperative pain intensity and blood loss after valve replacements.
authors.affiliation: Department of Anaesthesiology, Habib Bourguiba National University Hospital, 3029 Sfax, Tunisia. kamel.kolsi@rns.tn
authors.forename: K
authors.initials: K
authors.lastname: Kolsi
authors.forename: I
authors.initials: I
authors.lastname: Frikha
authors.forename: M
authors.initials: M
authors.lastname: Kolsi
authors.forename: M
authors.initials: M
authors.lastname: Khannous
authors.forename: S
authors.initials: S
authors.lastname: Masmoudi
authors.forename: M
authors.initials: M
authors.lastname: Salah Kechaou
authors.forename: Y
authors.initials: Y
authors.lastname: Sahnoun
authors.forename: A
authors.initials: A
authors.lastname: Karoui
mesh_terms: D000328:Adult; D001021:Aortic Valve / Q000601:surgery; D005260:Female; D006349:Heart Valve Diseases / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery; D010147:Pain Measurement; D010149:Postoperative Pain / Q000209:etiology / Q000517:prevention & control*; D019106:Postoperative Hemorrhage / Q000209:etiology / Q000517:prevention & control*; D013396:Suction / Q000295:instrumentation*