A Method for Creating Artificial Thrombi In Vitro Using a Rotating Mechanical Surface.
ASAIO J
; 62(3): 252-60, 2016.
Article
em En
| MEDLINE
| ID: mdl-26735557
ABSTRACT
Thromboembolism is a common concern in ventricular assist device (VAD) therapy. Precise VAD response to pass-through thromboembolism needs to be studied in a controlled in vitro setting where specific pump parameters (i.e., power consumption, flow rates, impeller RPM) can be monitored while various types of thrombi are introduced. In this article, we describe a method for creating standardized fibrin thrombi that could be introduced into a mock circulatory loop for testing VAD response to thromboembolism. Donor equine blood collected using a sodium citrate was allowed to clot by adding calcium chloride (CaCl2) while a rotating component applied shear forces to the blood. This rotating force was applied at various speeds and at various distances into the blood. Resulting clots showed similar microscopic features to thrombi taken from explanted clinical VADs. Higher RPM of the rotating component and smaller clearances between the rotating component and the blood created clots that closely resembled ante-explant clots found within VADs in vivo. This method is an effective way to create artificial fibrin clots for use in in vitro experiments to test thromboembolism in VADs.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Tromboembolia
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Coração Auxiliar
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Modelos Animais de Doenças
Tipo de estudo:
Etiology_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article