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In vitro study on device-induced damage to blood cellular components and degradation of von Willebrand factor in a CentriMag pump-assisted circulation.
Wang, Shigang; Sun, Wenji; Han, Dong; Clark, Kiersten P; Griffith, Bartley P; Wu, Zhongjun J.
Afiliação
  • Wang S; Artificial Organ Lab, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
  • Sun W; Artificial Organ Lab, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
  • Han D; Artificial Organ Lab, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
  • Clark KP; Artificial Organ Lab, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
  • Griffith BP; Artificial Organ Lab, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
  • Wu ZJ; Artificial Organ Lab, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
Artif Organs ; 48(9): 988-996, 2024 Sep.
Article em En | MEDLINE | ID: mdl-38712632
ABSTRACT

BACKGROUND:

High mechanical shear stress (HMSS) generated by blood pumps during mechanical circulatory support induces blood damage (or function alteration) not only of blood cell components but also of plasma proteins.

METHODS:

In the present study, fresh, healthy human blood was used to prime a blood circuit assisted by a CentriMag centrifugal pump at a flow rate of 4.5 L/min under three pump pressure heads (75, 150, and 350 mm Hg) for 4 h. Blood samples were collected for analyses of plasma-free hemoglobin (PFH), von Willebrand factor (VWF) degradation and platelet glycoprotein (GP) IIb/IIIa receptor shedding.

RESULTS:

The extent of all investigated aspects of blood damage increased with increasing cross-pump pressure and duration. Loss of high-molecular-weight multimers (HMWM)-VWF in Loop 2 and Loop 3 significantly increased after 2 h. PFH, loss of HMWM-VWF, and platelet GPIIb/IIIa receptor shedding showed a good linear correlation with mean shear stress corresponding to the three pump pressure heads.

CONCLUSIONS:

HMSS could damage red blood cells, cause pathological VWF degradation, and induce platelet activation and platelet receptor shedding. Different blood components can be damaged to different degrees by HMSS; VWF and VWF-enhanced platelet activation may be more susceptible to HMSS.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estresse Mecânico / Fator de von Willebrand / Coração Auxiliar Limite: Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estresse Mecânico / Fator de von Willebrand / Coração Auxiliar Limite: Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article