TITLE: Design of a Hydrodynamic Performance Bench for Ventricular Assist Devices

author(s): Santos, B.J., Leão, T.F., Drigo, E., Fonseca, J., Andrade, A.J.P., Nishida, B.y.T. & Bock, E.G.P.

ABSTRACT: This work presents the design of a hydrodynamic performance bench (HPB) of Ventricular Assist Devices (VADs) for evaluations of developed prototypes. VADs are used for the treatment of patients with Congestive Heart Failure (CHF), either as a bridge to recovery, for transplantation or as destination therapy. HPB is required for the performance evaluation of VADs that are under development in Brazil. The performance evaluation of a VAD considers the rotation speed [rpm], flow rate [L/min], pressure [mmHg] and power [W]. The project consists in choosing an actuator and transducers from HPB, and developing the mechanical components, supervisory control and modules. The HPB mechanical components were designed in SolidWorks® following rapid prototyping and built by additive manufacturing. The HPB supervisory program was developed in graphic language through the Labview® program and implemented in a development and application platform with data acquisition system. The manipulated variable of the supervisory system is the motor speed [rpm] acting via an Escon 50/4 EC-S power controller on the BLDC EC45 N339281 motor. The controlled variable is the “VAD flow” [L/min] provided by an HT-110 flow transducer. A particle image velocimetry (PIV) module was developed for flow analysis. All process data are stored in spreadsheets for later consultation. HPB could assist in a satisfactory way in the analysis of the developed VADs prototypes, demonstrating the technical success of the project.

KEYWORDS: Test and Evaluation bench, Ventricular Assist Devices (VADs), Control and automation and Bioengineering.

CITATION: Santos, B. J. et al. Design of a hydrodynamic performance bench for ventricular assist devices. The Academic Society Journal, 6(1) 7-26, 2022. DOI: doi.org/10.32640/tasj.2022.1.7.