Document Detail

Optimization of the pump driven venous return for minimally invasive open heart surgery.
MedLine Citation:
PMID:  10585133     Owner:  NLM     Status:  MEDLINE    
Blood return into the cardiotomy reservoir is usually reduced when a cardiopulmonary bypass (CPB) is initiated through a peripheral access, even if the tip of the venous cannula is pushed into the right atrium. A centrifugal pump can be placed on the venous line to increase the negative pressure. Surgery involving the right atrium requires selective cannulation of both vena cavae. Because of the small diameter of the vena cava as compared to the right atrium, the benefit of the centrifugal pump may have limitations. We analyze the factors influencing the active venous return when the cannula is maintained into the vena cava. In 4 calves (83.0+/-14.9 Kg) a CPB was initiated through carotid and jugular access, with the tip of the venous cannula placed into the superior vena cava, before ventricular fibrillation was provoked. Venous drainage was progressively increased thanks to the centrifugal pump. Considering the negative pressure induced on the venous line, we analyzed the performance expressed in l/min of blood drained, of four one stage cannulae ("lighthouse" tip 24F, 28F or 32F, and percutaneous 28F). The performance of all cannulae were highly dependent on the central venous pressure (CVP) with better drainage for higher CVP. The size and type of cannula also significantly affected blood drainage. Active drainage was best with the percutaneous 28F cannula. This cannula was specially attractive at low CVP conditions.
H T Tevaearai; X M Mueller; D Jegger; M Augsburger; F Stumpe; L K von Segesser
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The International journal of artificial organs     Volume:  22     ISSN:  0391-3988     ISO Abbreviation:  Int J Artif Organs     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-12-30     Completed Date:  1999-12-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7802649     Medline TA:  Int J Artif Organs     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  684-9     Citation Subset:  IM    
Department of Cardiovascular Surgery, University Hospital, Lausanne, Switzerland.
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MeSH Terms
Blood Flow Velocity
Cardiopulmonary Bypass / instrumentation*,  methods
Cardiovascular Diseases / physiopathology
Disease Models, Animal
Heart-Assist Devices*
Myocardial Reperfusion / instrumentation,  methods
Reference Values
Sensitivity and Specificity
Surgical Procedures, Minimally Invasive / instrumentation*,  methods

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