Effects of implantation on the mechanical properties of the Polyurethane diaphragm of left ventricular assist devices

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

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Tensile properties of blood pump diaphragms made from a segmented polyether polyurethane (Toyobo TM5) were studied after implanting in goats for variable periods of time up to 72 days. The implantation decreased the tensile strength and ultimate elongation at break, while the elastic modulus increased very slightly. These changes in the strength and ductility were primarily caused by the contact of material with blood rather than by the mechanical fatigue of material. Mechanical stability was greatly improved by removing residual oligomers from the material by a refining procedure. The refined polyurethane has characteristics favourable for blood pump applications.

Original languageEnglish
Pages (from-to)82-88
Number of pages7
JournalBiomaterials
Volume6
Issue number2
DOIs
Publication statusPublished - 1985
Externally publishedYes

Fingerprint

Left ventricular assist devices
Heart-Assist Devices
Polyurethanes
Diaphragms
Diaphragm
Blood
Mechanical properties
Pumps
Mechanical stability
Tensile Strength
Polyethers
Elastic Modulus
Tensile properties
Oligomers
Goats
Refining
Fatigue
Ductility
Elongation
Tensile strength

Keywords

  • implantation
  • in vitro fatigue test
  • left ventricular assist device
  • Polymers
  • Segmented polyether polyurethane
  • tensile properties

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering

Cite this

Effects of implantation on the mechanical properties of the Polyurethane diaphragm of left ventricular assist devices. / Hayashi, Kozaburo; Matsuda, Takehisa; Takano, Hisateru; Umezu, Mitsuo; Taenaka, Yoshiyuki; Nakamura, Takao.

In: Biomaterials, Vol. 6, No. 2, 1985, p. 82-88.

Research output: Contribution to journalArticle

Hayashi, Kozaburo ; Matsuda, Takehisa ; Takano, Hisateru ; Umezu, Mitsuo ; Taenaka, Yoshiyuki ; Nakamura, Takao. / Effects of implantation on the mechanical properties of the Polyurethane diaphragm of left ventricular assist devices. In: Biomaterials. 1985 ; Vol. 6, No. 2. pp. 82-88.
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