Real-time studies of the pivot bearings in the NEDO Gyro PI-710 centrifugal blood pump

Artificial Organs
Toshimasa AsaiY Nosé

Abstract

The NEDO Gyro PI-710 centrifugal pump (Gyro PI-710 pump) incorporates a double pivot bearing system of which the male pivot and female bearings are fabricated from Al2O3 ceramic and ultrahigh molecular weight polyethylene. The top female bearing is a critical component because the impeller is levitated by hydraulic force and is maintained in the top contact position. A long-term in vitro examination of the pivot bearings was conducted using a biventricular assist model. In 7 animal experiments, the depth change of the top female bearing was examined. Animal experiments up to 90 days revealed that there was no noticeable depth increase in the top female bearing. According to the in vitro study, the life of the pivot bearings of the left and right pump was estimated to be approximately 3 and 7 years, respectively. Further improvement of this pivot bearing system is currently underway.

References

Jun 1, 1996·Artificial Organs·K MakinouchiY Nosé
Sep 4, 1999·The Annals of Thoracic Surgery·Y NoséH Schima
Dec 28, 1999·Clinical Orthopaedics and Related Research·H McKellopJ G Lancaster
Jul 13, 2000·Artificial Organs·P A WattersonJ A Reizes
Jun 14, 2001·Artificial Organs·C NojiriS Saito
Aug 3, 2001·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·K BourqueP Litwak
Oct 4, 2003·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Seiji IchikawaYukihiko Nosé
May 1, 1996·Artificial Organs·K MakinouchiY Nose

❮ Previous
Next ❯

Citations

Feb 3, 2009·Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs·Takashi YamaneTatsuo Tsutsui
Feb 24, 2005·Artificial Organs·Paul S Malchesky
Jun 9, 2006·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Daisuke OgawaYukihiko Nosé
Aug 3, 2006·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Tadashi MotomuraYukihiko Nosé

❮ Previous
Next ❯

Related Concepts

Related Feeds

Artificial Heart & Ventricular Assist Devices

Total artificial hearts (TAH) and ventricular assist devices (VADs) provide cardiac support for patients with end-stage heart disease and have significantly improved the survival of these patients. Discover the latest research on Artificial Heart and Ventricular Assist Devices here.