Splitting Ventilator Valve Concept used in the COVID-19 Treatment Through Additive Manufacturing Technique ALESSANDRO MARCIO HAKME DA SILVA, Luis G.C. Romagnolo, Felipe Campos Ferreira, Emilio de Almeida Belmonte, Lucas Alves De Souza, et al. IEEE Latin America Transactions, 2021 Due to COVID-19 outbreak, many sectors around the globe have been facing the most diverse crisis. Regarding the health system, hospitals all over the world have been going through, among so many challenges, shortage of resources that could, if available, help them on the fight against COVID-19, and even save the lives of their patients. This review paper aims to offer for both healthcare providers and patients, better conditions when fighting the disease, regarding the actual primary care shortage, and addressing a splitting valve concept coupled to the mechanical ventilators in the most severe cases. The automated valve development with a monitoring and analysis system for pulmonary mechanics will stablish the database parameters of patients with COVid-19 and SARS, in order to assist the medical team in the treatment of diseases and the average evolution of the clinical condition of patients at an early stage, contributing to a reduction in the time of hospitalization and treatment and mortality. These information is saved on a database shared with other hospitals, allowing a search for matching patients; with similar or same pulmonary compliance, gender, height, weight, respiratory frequency and, in most severe cases when the patient needs mechanical ventilation, the availability of the nearest treatment is verified viewing immediate care. Regarding the mechanical ventilator device usage, the automated valve views engaged to a human-machine interface from the systems hardware allows the treatment of multiple patients, under the same ventilator, in an individualized way. To achieve that, pressure transducers and controllers of flow and temperature will continuously monitor the adequate flow of air and pressure to each patient that are under the same ventilator. Moreover, when monitoring each patient among the health units and hospitals integrated to the system, the medical team is helped defining the best strategy to the treatment stage and, by these means, the use of mechanical ventilator by the CoVID-19 patient is amplified, allowing to attend more than one patient who will need mechanical ventilation with SARS an accuracy treatment and monitoring method.
Feasibility study of small scale production based on additive manufacturing technologies Proceedings 26th Annual International Solid Freeform Fabrication Symposium an Additive Manufacturing Conference Sff 2015, 2020
Study of vapourised solvent attack on additive manufacturing part surface Proceedings 26th Annual International Solid Freeform Fabrication Symposium an Additive Manufacturing Conference Sff 2015, 2020
Development of automatic smoothing station based on solvent vapour attack for low cost 3D Printers Solid Freeform Fabrication 2017 Proceedings of the 28th Annual International Solid Freeform Fabrication Symposium an Additive Manufacturing Conference Sff 2017, 2020
Assessment of the elastic properties of human vertebral trabecular bone using computational mechanical tests and x-ray microtomography - A subvolume analysis A M H Silva, S K Boyd, S L Manske, J M Alves, J de Carvalho Biomedical Physics and Engineering Express, 2019 Trabecular bone structures can be modeled as a linear elastic solid, with a heterogeneous and anisotropic structure. The HR-pQCT technique is ideal for the characterization of trabecular bone to measure aspects of bone quality in diseases such as osteoporosis. In this investigation, twelve human vertebrae were used for the investigation of the mechanical properties of trabecular bone by finite element analysis (FEA). A virtual cube sample with 18.5 mm sides was extracted from each vertebrae and four smaller central cubes were obtained from it, with a 20% reduction of volume for each cube. The direct mechanics approach by FEA was performed (FAIM v6.0, Numerics88 Solutions Ltd) and mean values on three mean directions of loading resulting in: E1 = 294 MPa, E2 = 258 MPa, E3 = 153 MPa, G23 = 86 MPa, G31 = 103 MPa, G12 = 100 MPa. The Statistical Analysis was applied showing that E1 values are statically different from E3, and E2 are statically different from E3, with E2 equal to E1. This indicates that there are two different mean directions of loading on these trabecular bone samples of human vertebrae. The assessment of microstructural properties showed a tendency to increased connectivity of trabeculae, which occurs as the reduction of the analyzed subvolumes (100% to 20% or 18.5 mm to 3.7 mm) followed by an addition of bone volume fraction values. Those results highlight the idea that mechanical properties are better described in local regions, in other words, a local assessment with smaller sample size maintain the volume fraction and connectivity improving the prediction of bone strength. The mechanical properties are better associated with microstructural information in the subvolume, reducing the time of scan and radiation dose, which can generate bone quality parameters, for the diagnosis of bone diseases and prediction of fracture risk of bone structures with higher accuracy.
Development and characterisation of 3D printing finishing process applying recycled plastic waste Marlon Wesley Machado Cunico, Dalton Alexandre Kai, Patrick Medeiros Cavalheiro, Jonas de Carvalho Virtual and Physical Prototyping, 2019 In recent years, additive manufacturing technologies have been playing an important role in the global economy. Consequently, low-cost 3D printers rose in the domestic environment, accelerating the development of startup companies and new market segments. Nevertheless, with regard to 3D printing based on fused filament fabrication, several challenges still need to be overcome, such as those related to surface finishing and mechanical strength. Moreover, 3D printing in the domestic environment also generates untreated plastic waste, which can cause environmental problems. For these reasons, the main goal of this work is to introduce and characterise 3D printing surface finishing post-processing using recycled plastic waste. As the main results of this work, the proposed recycling process was confirmed to improve object properties. Whereas surface roughness was reduced from 27 to 3 µm, while mechanical strength was increased in 20 times. The application of recycled material for chemical welding was also seen to be feasible.
New network based finite element method for stereolithography process analysis Proceedings of the International Conference on Progress in Additive Manufacturing, 2016
New additive manufacturing technology based on selective metal-polymer composite formation Proceedings of the International Conference on Progress in Additive Manufacturing, 2016
Vacuum formed gfrp profiles used as external reinforcement in damaged concrete sctructures - Low cost approach Iccm International Conferences on Composite Materials, 2009
Process parameters investigation on the fibre-matrix adhesion of continuous fibres reinforced polytetrafluoroethylene (PTFE) Iccm International Conferences on Composite Materials, 2009
Compression tests of castor oil biopolymer Amauri Bravo Ferneda, Romeu Rony Cavalcante da Costa, Volnei Tita, Sérgio Persival Baroncini Proença, Jonas de Carvalho, et al. Materials Research, 2006
Rapid manufacturing - An evaluation of Rapid Prototyping and HSC technologies in product development Virtual Modelling and Rapid Manufacturing Advanced Research in Virtual and Rapid Prototyping, 2005
Mould manufacturing in isostatic pressing using CAD/CAE technology and Rapid prototyping Ciencia Y Engenharia Science and Engineering Journal, 2003
