title: Comparison of two technics of cardiopulmonary bypass (conventional and mini CPB) in the trans-and postoperative periods of cardiac surgery.
abstract: OBJECTIVE
  This study aimed to compare the effects of two different perfusion techniques: conventional cardiopulmonary bypass and miniature cardiopulmonary bypass in patients undergoing cardiac surgery at the University Hospital of Santa Maria--RS.
  
  
  METHODS
  We perform a retrospective, cross-sectional study, based on data collected from the patients operated between 2010 and 2013. We analyzed the records of 242 patients divided into two groups: Group I: 149 patients undergoing cardiopulmonary bypass and Group II - 93 patients undergoing the miniature cardiopulmonary bypass.
  
  
  RESULTS
  The clinical profile of patients in the preoperative period was similar in the cardiopulmonary bypass and miniature cardiopulmonary bypass groups without significant differences, except in age, which was greater in the miniature cardiopulmonary bypass group. The perioperative data were significant of blood collected for autotransfusion, which were higher in the group with miniature cardiopulmonary bypass than the cardiopulmonary bypass and in transfusion of packed red blood cells, which was higher in cardiopulmonary bypass than in miniature cardiopulmonary bypass. In the immediate, first and second postoperative period the values of hematocrit and hemoglobin were higher and significant in miniature cardiopulmonary bypass than in the cardiopulmonary bypass, although the bleeding in the first and second postoperative days was higher and significant in miniature cardiopulmonary bypass than in the cardiopulmonary bypass.
  
  
  CONCLUSIONS
  The present results suggest that the miniature cardiopulmonary bypass was beneficial in reducing the red blood cell transfusion during surgery and showed slight but significant increase in hematocrit and hemoglobin in the postoperative period.
authors.affiliation: Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Sergio Nunes
authors.initials: SN
authors.lastname: Pereira
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Izabelle Balta
authors.initials: IB
authors.lastname: Zumba
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Micheline Sulzbacher
authors.initials: MS
authors.lastname: Batista
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Daniela da
authors.initials: Dd
authors.lastname: Pieve
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Elisandra dos
authors.initials: Ed
authors.lastname: Santos
authors.affiliation: Hospital Universitário de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Ralf
authors.initials: R
authors.lastname: Stuermer
authors.affiliation: Hospital Universitário de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Gerson Pereira de
authors.initials: GP
authors.lastname: Oliveira
authors.affiliation: Hospital Universitário de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Roberta
authors.initials: R
authors.lastname: Senger
mesh_terms: D006348:Cardiac Surgical Procedures / Q000379:methods*; D002315:Cardiopulmonary Bypass / Q000295:instrumentation / Q000379:methods*; D003430:Cross-Sectional Studies; D017707:Erythrocyte Transfusion / Q000706:statistics & numerical data*; D005260:Female; D006400:Hematocrit; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010477:Perfusion; D019106:Postoperative Hemorrhage / Q000628:therapy*; D011184:Postoperative Period; D012189:Retrospective Studies
chemical_list: D006454:Hemoglobins