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Improved durability of the “EMIKS”; artificial heart valves

  • Research, Design, and Technology
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Biomedical Engineering Aims and scope

Conclusions

1. The effects of microhardness and density in a carbon-Pyroceram on its wear were investigated. A determination was made of the temperature range for titanium heat treatment in which its microstructure affords high strength and polishability characteristics. Optimal values have been obtained for the density and microhardness of the carbon-Pyroceram when working in a pair with the titanium.

2. The reasons for the appearance of increased disk wear where it was in contact with housing elements were analyzed. Rules are proposed for selecting tools that eliminate the possibility of implanting abrasive particles in housings' surfaces. Life tests were performed on valves for 8·108 cycle without failure.

3. As a result of the studies we have made, a guaranteed service period of not less than 20 years from the date of an implantation has been established for the type “EMIKS” heart valves.

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Literature cited

  1. E. R. Breituéi, Solid Lubrication Materials and Antifriction Coatings [Russian translation], Moscow (1967).

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Authors
  1. R. A. Kevorkova
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  2. N. A. Iofis
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  3. E. V. Dzevishek
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  4. A. V. Agafonov
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  5. V. I. Kalugin
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  6. E. I. Kuznetsova
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  7. Yu. V. Zaretskii
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  8. N. B. Dobrova
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Additional information

“Émitron” Factory for Elements of Electronic Devices, A. M. Bakulev Institute of Cardiovascular Surgery, Academy of Medical Sciences of the USSR, Moscow. Translated from Meditsinskaya Tekhnika, No. 6, pp. 9–15, November–December, 1989.

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Kevorkova, R.A., Iofis, N.A., Dzevishek, E.V. et al. Improved durability of the “EMIKS”; artificial heart valves. Biomed Eng 23, 204–209 (1989). https://doi.org/10.1007/BF00572204

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  • DOI: https://doi.org/10.1007/BF00572204

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