Safety Control Architecture for Ventricular Assist Devices

Author(s)

Cavalheiro, Andre C. M. ^{[1, 2]} ; Santos Filho, Diolino J. ^[1] ; Dias, Jonatas C. ^[1] ; Andrade, Aron J. P. ^{[1, 3]} ; Cardoso, Jose R. ^[1] ; Tsuzuki, Marcos S. G. ^[1]

Affiliation

^[1] Univ Sao Paulo, Escola Politecn, Dept Engn Mecatron & Sistemas Mecan, BR-05508030 Sao Paulo - Brazil

^[2] Ctr Univ Fundacao Santo Andre, Dept Engn Mecatron, BR-09060650 Santo Andre, SP - Brazil

^[3] Bioengn Inst Dante Pazzanese Cardiol, BR-04012909 Sao Paulo - Brazil

• Document type: Journal article
• Source: MACHINES; v. 10, n. 1 JAN 2022.
• Web of Science Citations: 0

Abstract

In patients with severe heart disease, the implantation of a ventricular assist device (VAD) may be necessary, especially in patients with an indication for heart transplantation. For this, the Institute Dante Pazzanese of Cardiology (IDPC) has developed an implantable centrifugal blood pump that will be able to help a diseased human heart to maintain physiological blood flow and pressure. This device will be used as a totally or partially implantable VAD. Therefore, performance assurance and correct specification of the VAD are important factors in achieving a safe interaction between the device and the patient's behavior or condition. Even with reliable devices, some failures may occur if the pumping control does not keep up with changes in the patient's behavior or condition. If the VAD control system has no fault tolerance and no system dynamic adaptation that occurs according to changes in the patient's cardiovascular system, a number of limitations can be observed in the results and effectiveness of these devices, especially in patients with acute comorbidities. This work proposes the application of a mechatronic approach to this class of devices based on advanced control, instrumentation, and automation techniques to define a method to develop a hierarchical supervisory control system capable of dynamically, automatically, and safely VAD control. For this methodology, concepts based on Bayesian networks (BN) were used to diagnose the patient's cardiovascular system conditions, Petri nets (PN) to generate the VAD control algorithm, and safety instrumented systems to ensure the safety of the VAD system. (AU)

• FAPESP's process: 13/24434-0 - Electromagnetic propeller systems for implantable artificial heart and mechanical circulatory support devices
• Grantee: José Roberto Cardoso
• Support Opportunities: Research Projects - Thematic Grants