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Laboratory Performance Testing of Venous Cannulae During Inlet Obstruction
Author(s) -
Simons Antoine P.,
Ganushchak Yuri,
Wortel Pieter,
Van Der Nagel Theo,
Van Der Veen Frederik H.,
De Jong Dick S.,
Maessen Jos G.
Publication year - 2008
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 - 10.1111/j.1525-1594.2008.00584.x
Subject(s) - cannula , medicine , inlet , significant difference , anesthesia , surgery , conductance , biomedical engineering , engineering , mathematics , mechanical engineering , combinatorics
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.