Design of Pusher‐Plate‐Type Left Ventricular Assist Device Based on Mechanical Analyses

Kozaburo Hayashi, Takao Nakamura, Hisateru Takano, Mitsuo Umezu, Yoshiyuki Taenaka, Takehisa Matsuda

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Abstract: A permanently implantable left ventricular assist device (LVAD) pump of the pusher‐plate type was designed based on mechanical analyses. A series of three different segmented polyether polyurethanes was utilized for the diaphragm, cannulae, and their blood‐contacting surfaces, considering each material's characteristics. The span and thickness of the pump diaphragm were determined so as to minimize the stress developed by the bending and blood pressure forces. The inflow and outflow cannulae were designed using fundamental equations that describe the operation of a piston‐type reciprocating pump. The pump diameter was determined considering the required flow for the average Japanese person. In vitro and in vivo experiments showed good pump performance, which satisfied the design specifications. No failure was observed in the designed diaphragm. The Hall effect sensor incorporated in the pump was very useful in monitoring the cardiac output of the pump.

Original languageEnglish
Pages (from-to)204-214
Number of pages11
JournalArtificial Organs
Volume8
Issue number2
DOIs
Publication statusPublished - 1984 May
Externally publishedYes

Keywords

  • Fluid mechanics
  • Hall effect sensor
  • Left ventricular assist
  • Polyether polyurethane
  • Pusher plate

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

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