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Flow Dynamic Comparison of Peripheral Venous Cannulas Used with Centrifugal Pump Assistance In Vitro
Author(s) -
Jegger David,
Tevaearai Hendrik T.,
Mueller Xavier M.,
Pierrel Nicolas,
Horisberger Judith,
Von Segesser Ludwig K.
Publication year - 2002
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1046/j.1525-1594.2002.06820.x
Subject(s) - cannula , peripheral , vein , superior vena cava , medicine , centrifugal pump , cardiopulmonary bypass , biomedical engineering , inferior vena cava , surgery , anesthesia , mechanics , physics , impeller
Because of the risk of vein collapse, the benefits of using a centrifugal pump to assist venous drainage for cardiopulmonary bypass are limited when the tips of peripheral cannulas are maintained within the vena cava. Using a mock circuit including 20 mm diameter latex tubing to mimic a vena cava, we compared the performance of 6 commercially available peripheral venous cannulas and attempted to determine potential factors influencing maximal flow drainage before vein collapse. A close correlation was observed with the total hole area of the cannula. Best performance (5.10 ± 0.08 L/min) was obtained with an 8 mm internal diameter (ID) cannula and 343 mm 2 total hole area. A larger cannula (ID 9.2 mm) with only 209 mm 2 total hole area drained 5.03 ± 0.05 L/min whereas a smaller cannula (ID 6.7 mm) with a total hole area of 586 mm 2 also allowed a similar flow of 5.03 ± 0.12 L/min. Therefore, the total hole area appears to be a critical factor in designing peripheral cannulas used in restricted chambers such as vena cavae.