Impeller geometry definition of the transventricular assist device
| Autor: | Aron Andrade, Evandro Drigo, José Roberto Cardoso, Oswaldo Horikawa, Gustavo Caravita de Andrade |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Computer science medicine.medical_treatment 0206 medical engineering Biomedical Engineering Medicine (miscellaneous) Bioengineering 02 engineering and technology 030204 cardiovascular system & hematology Hemolysis Models Biological World health law.invention Biomaterials Prosthesis Implantation 03 medical and health sciences Impeller 0302 clinical medicine law Internal medicine medicine Humans Minimally Invasive Surgical Procedures Spiral Axial-flow pump Rotor (electric) Transventricular Hemodynamics General Medicine 020601 biomedical engineering Axial compressor Ventricular assist device Cardiology Heart-Assist Devices Shear Strength VALVAS CARDÍACAS |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | According to the World Health Organization, cardiovascular disease is the number one cause of death worldwide, except Africa, where Acquired Immune Deficiency Syndrome is the leading cause of death. In this scenario, the ventricular assist device (VAD) remains the unique alternative to extend patient life until heart transplantation. At Dante Pazzanese Institute of Cardiology, the research and development of an axial flow VAD to be fully implantable within the heart was started. This pump, denominated Transventricular Assist Device (TVAD), can be surgically implanted through a small left intercostal incision in a minimally invasive manner. The goal of this work is to analyze the impeller geometries of the TVAD, to avoid high shear stresses in the fluid and aim for the best conditions to support the circulatory system using computational fluid dynamics and in vitro tests. Different rotor geometries were selected according to the literature; based on the results, the best rotor was elected. This rotor contains a pair of spiral blades of constant and relatively high pitch, which pumps liquid at a flow rate of 3 L/min at 73 mm Hg. It is also expected that this rotor presents a moderate hemolysis since the shear rate is acceptable. |
| Databáze: | OpenAIRE |
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