Your browser doesn't support javascript.
Design of a Simulator for Ventricular Assistance Devices
ASAIO Journal ; 68:106-107, 2022.
Article in English | EMBASE | ID: covidwho-2032189
ABSTRACT
Recent research shows that the number of patients with heart disease is still bigger than Covid 19 disease. Some indicators in Brazil indicate about 400,000 deaths per year. Because of heart disease, heart failure is responsible for the main cause of hospitalization of patients over 65 years of age. Part of these patients eventually developed one or more severe disease because of heart disease, leaving as clinical alternatives, treatments, and more aggressive procedures such as heart transplantation. The current scenario for patients waiting for a heart transplantation is actually aggravated each day by the pandemic. Other problem is the organ rejection that is 15% of mortality rate. Then a clinical alternative that can provide support and improve the life quality of patients with heart failure is the mechanical circulatory assistance devices. This kind of device is aiding and/or substitutes in cardiovascular function and it is recognized by the medicine showing satisfactory results over the years. However, the homologation of this kind of device to clinical use is hard and these devices need to be submitted to exhaustive tests, in distinct phases. “In Vitro” validations are applied, a test performed in simulators, whether they physical, computational or hybrid and “In Vivo”, a test that is performed on animals. After these validations, clinical evaluations are started for equipment approval. In this context, the objective of this work is to present the design, construction and functioning of a physical fluid dynamic simulator, which allows testing in ventricular assist devices, with the ability to reproduce the variations of systolic and diastolic blood pressure, as well as the other phenomena related to the functioning of the cardiovascular system. For the project, we used a review of the historical line of the simulators, concepts of hydraulics, anatomy of the human cardiovascular system, heart diseases and PID control algorithms from the theoretical basis. The construction of the physical plant is finished and some tests are made presenting excellent results. The simulator is equipped with two tanks, one proportional control valves, recirculation systems, two level control sensors, blood flow meters, an Microcontroller with a PID control algorithm and a man machine interface developed in android platform. The tests demonstrated the full functioning of the simulator, with the automatic stabilization of the levels, pressure and flow. The tests were made based on the patient body conditions and the variation parameters were observed of the ventricular assist device response. Then the some heart disease were simulated with the modulation of the valve and the monitoring of the ventricular assist device flow as a function of the setpoint change, all these parameters inserted and monitored through a cellular application. (Figure Presented).
Keywords

Full text: Available Collection: Databases of international organizations Database: EMBASE Language: English Journal: ASAIO Journal Year: 2022 Document Type: Article

Similar

MEDLINE

...
LILACS

LIS


Full text: Available Collection: Databases of international organizations Database: EMBASE Language: English Journal: ASAIO Journal Year: 2022 Document Type: Article