Hemolytic characteristics of a pivot bearing supported Gyro centrifugal pump (C1E3) simulating various clinical applications

Yoshiyuki Takami, Kenzo Makinouchi, Tadashi Nakazawa, Robert Benkowski, Julie Glueck, Yasuhisa Ohara, Yukihiko Nosé

研究成果: Article査読

48 被引用数 (Scopus)

抄録

Centrifugal blood pumps are playing a key role in circulatory mechanical assist systems including cardiopulmonary bypass (CPB), right and left ventricular assist devices (RVAD and LVAD), percutaneous cardiopulmonary support (PCPS), and extracorporeal membrane oxygenation (ECMO), Each of these circulatory assist systems requires specific flow and pressure conditions. In vitro hemolysis tests were performed using five compact mock loops with flow and pressure set equivalent to clinical conditions. These studies determined the hemolytic characteristics and clinical applicability of the pivot bearing-supported Gyro centrifugal pump with an eccentric port (C1E3) compared with the Bio-Medicus pump (BP-80). Normalized index of hemolysis (NIH) values of the C1E3 were less than those of the BP-80 under all conditions; in particular, they were significantly less in the CPB, LVAD, and RVAD conditions. In addition, linear correlation was observed between NIH values, rotational pump speed (RPM), total pressure head (ΔP), and flow rate (Q) with both the C1E3 and BP-80: NIH = a(RPM/ Q) + b, NIH = c(ΔP/Q) + d. However, the slopes (a and c) of these equations were smaller with the C1E3 than those with the BP-80, which suggests that the C1E3 has decreased hemolytic characteristics when increasing the RPM and ΔP. In other words, the increase of RPM and ΔP results in less shear stress with the C1E3 than with the BP-80. One cause of these decreased hemolytic characteristics of the C1E3 is thought to be less pump power loss against an increase of RPM and ΔP than with the BP-80. Furthermore, the average exposure time is shorter with the C1E3 than with the BP-80 because the priming volume of the C1E3 (30 ml) is smaller than that of the BP-80 (80 ml). From the point of both shear stress and exposure time, the C1E3 has less hemolytic features than the BP-80.

本文言語English
ページ(範囲)1042-1049
ページ数8
ジャーナルArtificial Organs
20
9
DOI
出版ステータスPublished - 01-01-1996
外部発表はい

All Science Journal Classification (ASJC) codes

  • バイオエンジニアリング
  • 医学(その他)
  • 生体材料
  • 生体医工学

フィンガープリント

「Hemolytic characteristics of a pivot bearing supported Gyro centrifugal pump (C1E3) simulating various clinical applications」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル