Sophisticated hydrodynamic simulation of pulmonary circulation for the preclinical examination of right heart circulatory assist device

Yusuke Tsuboko, Yasuyuki Shiraishi, Akihiro Yamada, Kiyotaka Iwasaki, Mitsuo Umezu, Tomoyuki Yambe

Research output: Contribution to journalConference article

Abstract

To evaluate systemic circulatory support devices such as left ventricular assist system, surgical heart valve prosthesis, and transcatheter aortic valve, various in vitro hydrodynamic tests have been performed. As these devices are being applied to the pulmonary circulatory support in recent years, novel evaluation platform for right heart support is increasingly demanded. This study aims to develop a pulmonary mechanical circulatory simulation system to assess the hydrodynamic performance of newly designed artificial cardiovascular devices. For the construction of the system, we developed the pneumatically-driven polymer right atrial and ventricular models with the pulmonary arterial valve chamber, silicone-made peripheral pulmonary artery model, and a venous reservoir. A woven polyester vascular graft and commercially available mechanical bileaflet valve were installed into the valve chamber. Then, the right ventricular pressure and pulmonary arterial pressure were regulated by the peripheral resistive unit. As a result, we successfully obtained the standard conditions of our mechanical circulatory system to be 28/3 (systolic/diastolic) mmHg of right ventricular pressure, 29/7, mmHg of pulmonary arterial pressure, 6, mmHg of mean right atrial pressure, and 3.0 L/min of pulmonary flow rate. To carry out the sophisticated assessment for the support of the pulmonary surgical and percutaneous treatments, we are preparing the next step with the reproduction of respiratory changes in pulmonary peripheral resistance, and the patient-specific shape vascular model including catheter access vessels. Under the highly simulated both pulmonary anatomical morphology and hemodynamic function conditions, effective preclinical examination of newly designed surgical or percutaneous pulmonary circulatory support devices can be performed.

LanguageEnglish
Pages717-720
Number of pages4
JournalIFMBE Proceedings
Volume68
Issue number3
DOIs
Publication statusPublished - 2019 Jan 1
EventWorld Congress on Medical Physics and Biomedical Engineering, WC 2018 - Prague, Czech Republic
Duration: 2018 Jun 32018 Jun 8

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Hydrodynamics
Heart valve prostheses
Polyesters
Catheters
Hemodynamics
Silicones
Grafts
Polymers
Flow rate

Keywords

  • Preclinical evaluation
  • Pulmonary mechanical circulatory simulator
  • Right heart support device

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

Cite this

Sophisticated hydrodynamic simulation of pulmonary circulation for the preclinical examination of right heart circulatory assist device. / Tsuboko, Yusuke; Shiraishi, Yasuyuki; Yamada, Akihiro; Iwasaki, Kiyotaka; Umezu, Mitsuo; Yambe, Tomoyuki.

In: IFMBE Proceedings, Vol. 68, No. 3, 01.01.2019, p. 717-720.

Research output: Contribution to journalConference article

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