Laboratory performance testing of venous cannulae during inlet obstruction
| Autor: | Yuri M. Ganushchak, Pieter Wortel, Antoine P. Simons, Theo van der Nagel, Frederik H. van der Veen, Jos G. Maessen, Dick S. de Jong |
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| Rok vydání: | 2008 |
| Předmět: |
Catheterization
Central Venous Extracorporeal Circulation Biomedical Engineering Medicine (miscellaneous) Bioengineering Biomaterials Venous line Medicine Humans geography geography.geographical_feature_category Single stage business.industry digestive oral and skin physiology Extracorporeal circulation Venous drainage General Medicine Equipment Design equipment and supplies Inlet Cannula Hydraulic conductance surgical procedures operative Anesthesia Drainage business Rheology Venous cannula |
| Zdroj: | Artificial organs. 32(7) |
| ISSN: | 1525-1594 |
| Popis: | 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 x 10(-2) L/min/mm Hg for a Thin-Flex Single Stage Venous Cannula with an open-end lighthouse tip to 1.55 x 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. |
| Databáze: | OpenAIRE |
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