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2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)最新文献

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Development of 3D computational models of biodegradable meshes 生物可降解网格三维计算模型的开发
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175349
Francisca Vaz, M. E. Silva, A. Fernandes, M. Parente
{"title":"Development of 3D computational models of biodegradable meshes","authors":"Francisca Vaz, M. E. Silva, A. Fernandes, M. Parente","doi":"10.1109/ENBENG58165.2023.10175349","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175349","url":null,"abstract":"The number of pelvic organ prolapse (POP) cases has been increasing over the years, affecting the lives of countless people around the world. To try to solve this problem, synthetic meshes were introduced until the FDA banned the commercialization of some of these meshes, and therefore new approaches are urgently needed [1]. Thus, the possibility of developing biodegradable meshes arises to overcome the problems encountered so far with the use of synthetic meshes, mainly due to their biocompatibility and biomechanical properties. Besides its main functionality of guaranteeing organ support, it presents good characteristics regarding its flexibility and resistance, thus guaranteeing a better reinforcement of the intervened region, avoiding eventual tissue injuries. This abstract focuses on the development of computational models of biodegradable meshes that, in the future, can be used to treat the POP.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131646876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Portable and Low-Cost Fluorometer for Phytoplankton Monitoring 用于浮游植物监测的便携式低成本荧光计
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175351
Leonardo R. C. Sá, V. Pinto, P. Sousa, V. H. Magalhães, Denise A. M. Carvalho, J. Afonso, Emilio Fernández, G. Minas, L. Gonçalves
{"title":"Portable and Low-Cost Fluorometer for Phytoplankton Monitoring","authors":"Leonardo R. C. Sá, V. Pinto, P. Sousa, V. H. Magalhães, Denise A. M. Carvalho, J. Afonso, Emilio Fernández, G. Minas, L. Gonçalves","doi":"10.1109/ENBENG58165.2023.10175351","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175351","url":null,"abstract":"Phytoplankton monitoring using fluorescence spectroscopy techniques has been frequently used over time. This monitoring is based on the detection of the main photosynthetic pigment, chlorophyll-a, as its concentration is widely used as a proxy of phytoplankton biomass in the water column. However, the fluorometers available for their measurement and use in the field are still quite expensive and bulky, which limit its in-situ and widespread use. This paper presents the development of a low-cost, simple and portable device for measuring phytoplankton chlorophyll-a concentration at sea. The fabricated device revealed a good performance for measuring chlorophyll-a concentrations, from 0.1 up to 75 µg/L with potential for in-situ, real-time and long-term monitoring.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130973597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Characterization of a Piezoelectric Transducer for Integration into a Photoacoustic System 集成于光声系统的压电换能器的实验表征
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175329
Bruna R. Pinheiro, H. Dinis, S. Catarino, V. Pinto, P. Sousa, G. Minas
{"title":"Experimental Characterization of a Piezoelectric Transducer for Integration into a Photoacoustic System","authors":"Bruna R. Pinheiro, H. Dinis, S. Catarino, V. Pinto, P. Sousa, G. Minas","doi":"10.1109/ENBENG58165.2023.10175329","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175329","url":null,"abstract":"Photoacoustic imaging (PAI) is a medical imaging modality that has been gaining relevance in the last decade due to its potential to safely acquire images, ranging from organelles to organs, without radiation. PAI uses the best features of both optical and acoustic methods. In this methodology, the target tissue is excited by a light source, triggering a local temperature rise in the tissue, which generates ultrasonic waves that are subsequently acquired by an ultrasound transducer. This hybrid modality allows a wide range of potential applications, namely in clinical medicine, preclinical research, and biology. This work aims at the experimental characterization of a piezoelectric transducer, towards developing the detection module of a photoacoustic system for biomolecule monitoring. Throughout the characterization of the transducers, we analyzed the resonance frequency, the reflection coefficient, and the outputted voltage amplitude. The electrical characterization showed resonance frequencies of 89 kHz and 4 MHz in the radial and longitudinal directions, respectively, which agree with the theory. Experimentally, by evaluating the acoustic propagation between an emitting and a receiving transducer, it was possible to observe a linear relationship between the amplitude of the emitted and received waves. In contrast, the amplitude of the received wave varies inversely with the distance between the transducers.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133204131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hospital Reprocessing Procedures - Challenges and Good Practices 医院再处理程序-挑战和良好做法
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175318
João Silva, F. Coutinho
{"title":"Hospital Reprocessing Procedures - Challenges and Good Practices","authors":"João Silva, F. Coutinho","doi":"10.1109/ENBENG58165.2023.10175318","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175318","url":null,"abstract":"The main purpose of this paper is to discuss the Reprocessing Units for Medical Devices (RUMEDs) of hospitals in order identify procedures and potential points to improve that will benefit the overall quality of service in target hospitals. We also examine key failures associated with this units. It will mainly focus on the mechanical washing and steam sterilization processes because they're the most often used. General considerations on the design of RUMED units, and its impact on the overall quality of the process, are also made.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134501496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical flows studies in a hyperbolic microchannel for biomedical applications 生物医学用双曲微通道的数值流动研究
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175353
Filipe Barbosa, Cristiano S. Abreu, Mónica S. A. Oliveira, Rui A. Lima, G. Minas
{"title":"Numerical flows studies in a hyperbolic microchannel for biomedical applications","authors":"Filipe Barbosa, Cristiano S. Abreu, Mónica S. A. Oliveira, Rui A. Lima, G. Minas","doi":"10.1109/ENBENG58165.2023.10175353","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175353","url":null,"abstract":"Mesh-based numerical methods have several limitations to simulate biofluids at a micro scale level, as they do not represent the multiphase component of them. In contrast, atomistic methods have the ability to simulate fluids with more than one phase, where the mesh is replaced by interacting particles. The LAMMPS code is a classical method of the molecular dynamics simulation, frequently used to assess the flow dynamics of particles. The main goal of this work is to compare the classical Molecular Dynamics (MD) with the finite volume method. Thus, for both type of simulations the same Newtonian fluid was used to assess the flow behavior along a hyperbolic contraction microchannel. The strain rate obtained for the flow rate of 0.22 and 1.00 ml/h have shown a good agreement between both methods.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116973485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Alternative Serum Biomarkers of Bacteraemia for Intensive Care Unit Patients 重症监护病房患者菌血症的替代血清生物标志物
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175340
Rúben Araújo, L. Ramalhete, Tiago A H Fonseca, Cristiana P Von Rekowski, Luís Bento, C. Calado
{"title":"Alternative Serum Biomarkers of Bacteraemia for Intensive Care Unit Patients","authors":"Rúben Araújo, L. Ramalhete, Tiago A H Fonseca, Cristiana P Von Rekowski, Luís Bento, C. Calado","doi":"10.1109/ENBENG58165.2023.10175340","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175340","url":null,"abstract":"The diagnosis of infections in hospital or clinical settings usually involves a series of time-consuming steps, including biological sample collection, culture growth of the organism isolation and subsequent characterization. For this, there are diverse infection biomarkers based on blood analysis, however, these are of limited use in patients presenting confound processes as inflammatory process as occurring at intensive care units. In this preliminary study, the application of serum analysis by FTIR spectroscopy, to predict bacteraemia in 102 critically ill patients in an ICU was evaluated. It was analysed the effect of spectra pre-processing methods and spectral sub-regions on t-distributed stochastic neighbour embedding. By optimizing Support Vector Machine (SVM) models, based on normalised second derivative spectra of a smaller subregion, it was possible to achieve a good bacteraemia predictive model with a sensitivity and specificity of 76%. Since FTIR spectra of serum is acquired in a simple, economic and rapid mode, the technique presents the potential to be a cost-effective methodology of bacteraemia identification, with special relevance in critically ill patients, where a rapid infection diagnostic will allow to avoid the unnecessary use of antibiotics, which ultimately will ease the load on already fragile patients' metabolism.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125538101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Time-dependent elastic numerical model for Optical Coherence Elastography of the murine retina 小鼠视网膜光学相干弹性成像的时变弹性数值模型
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175350
C. Correia, Ana Batista, S. Barbeiro, J. Cardoso, J. Domingues, Rafael Henriques, C. Loureiro, Mário J. Santos, P. Serranho, Rui Bernardes, M. Morgado
{"title":"Time-dependent elastic numerical model for Optical Coherence Elastography of the murine retina","authors":"C. Correia, Ana Batista, S. Barbeiro, J. Cardoso, J. Domingues, Rafael Henriques, C. Loureiro, Mário J. Santos, P. Serranho, Rui Bernardes, M. Morgado","doi":"10.1109/ENBENG58165.2023.10175350","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175350","url":null,"abstract":"We present the initial stages of development of a Finite Element Method-based time-dependent elastic numerical model which seeks to support the employment of our Optical Coherence Elastography system for assessing murine retinal elasticity. The current model is able to reconstruct displacement maps in both homogeneous and heterogeneous domains with errors up to a few hundredths relatively to a known exact displacement map, within 1 millisecond. The results demonstrate the robustness of the numerical algorithm under different elastic domains, and model parametrization with real Optical Coherence Elastography data is already in progress.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122531567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neurovascular coupling reflex - Contralateral stimulation apparatus and setup 神经血管耦合反射。对侧刺激装置和装置
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175365
J. Jordão, H. Quental, M. Morgado, J. Figueira, Daniela Castro-Farías, D. DeBuc, Miguel Castelo‐Branco, M. Pâques, Rui Bernardes
{"title":"Neurovascular coupling reflex - Contralateral stimulation apparatus and setup","authors":"J. Jordão, H. Quental, M. Morgado, J. Figueira, Daniela Castro-Farías, D. DeBuc, Miguel Castelo‐Branco, M. Pâques, Rui Bernardes","doi":"10.1109/ENBENG58165.2023.10175365","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175365","url":null,"abstract":"Neurovascular coupling (NVC) in the brain is well studied and is one of the physical stimulation responses triggered by the central nervous system. NVC, or functional hyperemia, is described as the local blood flow increase due to the release of vasodilator chemicals from neuronal cells into vessels. This behavior also exists in the retinal vasculature. However, it was only measured in the ipsilateral retina. Assessing photic stimulation in the contralateral retina can shed light on retina-retina or brain-retina neural pathways. Emerging technologies provide new ways of measuring this effect with high spatial and temporal resolution. Adaptive optics has been used in astronomy with great results. Yet, implementing this technology in retinal fundus imaging was revolutionary in providing extremely high spatial resolution images. The RTX1 ™ is an adaptive optics retinal camera capable of ipsilateral light flicker to stimulate photoreceptors and document the induced response. The NVC in the ipsilateral retina has been successfully assessed using this equipment. Using the RTX1™ with an external flickering device, it is possible to explore contralateral stimulation's effects. The first preliminary tests show a full working prototype (contralateral stimulation) with successful software integration into the RTX1TM. A set of images was acquired to fully document the entire procedure and evaluate all components. Further evaluation will be necessary to optimize flicker-related parameters in the quest for the ipsilateral NV C response.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126395517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Instrumented Canes for Parkinson's Disease: a Survey of Commercial and Research Solutions 帕金森氏病的仪器手杖:商业和研究解决方案的调查
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175359
Simão Pereira, F. Coutinho, Marco Silva, J. Barreiros
{"title":"Instrumented Canes for Parkinson's Disease: a Survey of Commercial and Research Solutions","authors":"Simão Pereira, F. Coutinho, Marco Silva, J. Barreiros","doi":"10.1109/ENBENG58165.2023.10175359","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175359","url":null,"abstract":"Instrumented canes have capabilities that allow them to provide functionalities beyond what a traditional cane can offer its user. This study presents a survey of existing instrumented canes, both of commercial and research nature. We identify the major types of features and functionalities offered by these canes, and also focus with particular interest on those offering capabilities aimed at improving the gait of Parkinson's patients, namely the provision of visual, auditory and tactile cues. We find that although special-purpose features dedicated to Parkinson's patients specific needs are commonly experimented with in research contexts, they are usually absent from commercially available solutions, which focus mainly on utility and emergency management features.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127653545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-intrusive monitoring of heart rate by an office chair instrumentated with optical fiber sensors 通过配备光纤传感器的办公椅对心率进行非侵入式监测
2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175338
Ana Almeida, Susana Brás, C. Leitão
{"title":"Non-intrusive monitoring of heart rate by an office chair instrumentated with optical fiber sensors","authors":"Ana Almeida, Susana Brás, C. Leitão","doi":"10.1109/ENBENG58165.2023.10175338","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175338","url":null,"abstract":"The continuous monitoring of vital signals is crucial in the diagnosis of cardiovascular diseases. With the focus on a continuous and non-intrusive acquisition of ballistocardiographic signal, a mobile seat instrumentalized with optical fiber sensors based on fiber Bragg gratings (FBGs) is proposed. The development of a six-sensor network will allow the study of the feasibility of their positioning to aim a greater efficiency. To calculate the heart rate, a time domain algorithm was developed based on the determination of the period between J-peaks of the ballistocardiograph. This model was tested on ten volunteers, in a sitting position, with data acquisitions carried out in periods of three minutes. To evaluate its performance, the results were compared with a wearable reference system, obtaining an accuracy greater than 95% for the majority of the participants, thus verifying that the developed system overcame the proposed objective.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132526789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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