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- Title
Laboratory Performance Testing of Venous Cannulae During Inlet Obstruction.
- Authors
Simons, Antoine P.; Ganushchak, Yuri; Wortel, Pieter; van der Nagel, Theo; van der Veen, Frederik H.; de Jong, Dick S.; Maessen, Jos G.
- Abstract
Venous cannulae undergo continuous improvements to achieve better and safer venous drainage. Several cannula tests have been reported, though cannula performance during inlet obstruction has never been a test criterion. In this study, five different cannulae for proximal venous drainage were tested in a mock circulation that enabled measurement of hydraulic conductance after inlet obstruction by vessel collapse. Values for hydraulic conductance ranged from 1.11 × 10–2 L/min/mm Hg for a Thin-Flex Single Stage Venous Cannula with an open-end lighthouse tip to 1.55 × 10–2 L/min/mm Hg for a DLP VAD Venous Cannula featuring a swirled tip profile, showing a difference that amounts to nearly 40% of the lowest conductance value. Excessive venous drainage results in potentially dangerous high-negative venous line pressures independent of cannula design. Cannulatip design featuring swirled and grooved tip structures increases drainage capacity and enhances cannula performance during inlet obstruction.
- Subjects
CATHETERS; CARDIAC surgery; HEART diseases; VEINS; BLOOD vessels
- Publication
Artificial Organs, 2008, Vol 32, Issue 7, p566
- ISSN
0160-564X
- Publication type
Article
- DOI
10.1111/j.1525-1594.2008.00584.x