title: Acute and temporary ventricular support with BioMedicus centrifugal pump.
abstract: BACKGROUND
  Short-term ventricular and pulmonary support can be provided by the Medtronic BioMedicus (Eden Prairie, MN) centrifugal pump, which is available in most cardiovascular surgery centers. This versatile pump can provide support during cardiopulmonary resuscitation, cardiopulmonary bypass, extracorporeal membrane oxygenation, and ventricular assistance. A common use of the pump is to provide ventricular assistance for patients after cardiotomy or cardiogenic shock.
  
  
  METHODS
  From January 1986 to September 1995, 141 patients at The Methodist Hospital in Houston, Texas were placed on the BioMedicus centrifugal pump after postcardiotomy cardiac failure. Patient treatment and postimplant complications are discussed.
  
  
  RESULTS
  Fifty-four percent of the patients were weaned; however, only 22% survived to discharge. There was a very high mortality rate in the early stage after support was discontinued, after weaning, and after device removal.
  
  
  CONCLUSIONS
  A high incidence of complications and death is likely related to the period of attempted weaning from cardiopulmonary bypass before the initiation of ventricular support. When weaning a patient from the pump during cardiopulmonary bypass or during ventricular assistance, it is important to optimize preload, after-load, ventricular function, and cardiac rhythm. In patients who have had postcardiotomy support, avoiding fluid overload, low colloid oncotic pressure, hypoperfusion, and use of excessive inotropic and vasoactive medications improve results.
authors.affiliation: Department of Surgery, Baylor College of Medicine, The Methodist Hospital, Houston, Texas, USA.
authors.forename: G P
authors.initials: GP
authors.lastname: Noon
authors.forename: J A
authors.initials: JA
authors.lastname: Lafuente
authors.forename: S
authors.initials: S
authors.lastname: Irwin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015199:Extracorporeal Membrane Oxygenation / Q000295:instrumentation; D005260:Female; D006333:Heart Failure / Q000209:etiology / Q000401:mortality / Q000601:surgery*; D006353:Heart-Assist Devices; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology / Q000401:mortality; D012770:Shock, Cardiogenic / Q000209:etiology / Q000401:mortality / Q000601:surgery*; D015996:Survival Rate