Novel temporary left ventricular assist system with hydrodynamically levitated bearing pump for bridge to decision: initial preclinical assessment in a ... View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2018-03

AUTHORS

Satoru Kishimoto, Yoshiaki Takewa, Tomonori Tsukiya, Toshihide Mizuno, Kazuma Date, Hirohito Sumikura, Yutaka Fujii, Kentaro Ohnuma, Konomi Togo, Nobumasa Katagiri, Noritsugu Naito, Yuichiro Kishimoto, Yoshinobu Nakamura, Motonobu Nishimura, Eisuke Tatsumi

ABSTRACT

The management of heart failure patients presenting in a moribund state remains challenging, despite significant advances in the field of ventricular assist systems. Bridge to decision involves using temporary devices to stabilize the hemodynamic state of such patients while further assessment is performed and a decision can be made regarding patient management. We developed a new temporary left ventricular assist system employing a disposable centrifugal pump with a hydrodynamically levitated bearing. We used three adult goats (body weight, 58-68 kg) to investigate the 30-day performance and hemocompatibility of the newly developed left ventricular assist system, which included the pump, inflow and outflow cannulas, the extracorporeal circuit, and connectors. Hemodynamic, hematologic, and blood chemistry measurements were investigated as well as end-organ effect on necropsy. All goats survived for 30 days in good general condition. The blood pump was operated at a rotational speed of 3000-4500 rpm and a mean pump flow of 3.2 ± 0.6 L min. Excess hemolysis, observed in one goat, was due to the inadequate increase in pump rotational speed in response to drainage insufficiency caused by continuous contact of the inflow cannula tip with the left ventricular septal wall in the early days after surgery. At necropsy, no thrombus was noted in the pump, and no damage caused by mechanical contact was found on the bearing. The newly developed temporary left ventricular assist system using a disposable centrifugal pump with hydrodynamic bearing demonstrated consistent and satisfactory hemodynamic performance and hemocompatibility in the goat model. More... »

PAGES

23-30

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10047-017-0989-y

DOI

http://dx.doi.org/10.1007/s10047-017-0989-y

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1091599167

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/28900738


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