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Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference最新文献

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Heart rate variability study in ambulatory stroke survivors 动态中风幸存者的心率变异性研究
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513723
Xiaorui Tang, S. Reisman, M. Daum, R. Zorowitz
{"title":"Heart rate variability study in ambulatory stroke survivors","authors":"Xiaorui Tang, S. Reisman, M. Daum, R. Zorowitz","doi":"10.1109/NEBC.1995.513723","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513723","url":null,"abstract":"To compare the parasympathetic activity of stroke survivors with that of normal subjects, power spectral analysis of heart rate variability (HRV) was performed on 6 pairs of age and gender matched stroke survivors and normal subjects. Four minutes of EKG data were collected from the subjects during sitting, supine, paced breathing and exercising using a Holter monitor. For each subject, parasympathetic activity was measured by calculating the area under the peak at the respiration frequency (0.15 to 0.4 Hz) in the power spectrum of the HRV. The power spectral analysis of HRV from the stroke survivors revealed significantly less parasympathetic activity than in normal subjects.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130125898","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
A novel near-infrared spectroscopy (NIRS) system for measuring regional oxygen saturation 一种新型近红外光谱(NIRS)测量区域氧饱和度系统
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513751
P. Benni, B. Chen, D. Amory, J.K. Li
{"title":"A novel near-infrared spectroscopy (NIRS) system for measuring regional oxygen saturation","authors":"P. Benni, B. Chen, D. Amory, J.K. Li","doi":"10.1109/NEBC.1995.513751","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513751","url":null,"abstract":"Near-infrared spectroscopy (NIRS) offers a continuous, non-invasive method of measuring biological tissue oxygenation. However, on-line, consistent quantitative measurements of oxy- and deoxyhemoglobin concentrations and tissue oxygen saturation by NIRS have met with challenging problems. We have developed a novel NIRS system that minimizes these problems in monitoring regional tissue oxygen saturation of the brain and skeletal muscle. The results show that our NIRS system measured tissue oxygen saturation levels that were expected in the experiments.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126943013","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: 7
Electromechanical simulator for cardiac catheter positioning: testing device for the intraventricular impedance imaging system 心导管定位机电模拟器:心室阻抗成像系统测试装置
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513738
Wei Wei, S. Kun, R. Peura
{"title":"Electromechanical simulator for cardiac catheter positioning: testing device for the intraventricular impedance imaging system","authors":"Wei Wei, S. Kun, R. Peura","doi":"10.1109/NEBC.1995.513738","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513738","url":null,"abstract":"An electromechanical simulator for cardiac catheter positioning testing has been developed to experimentally evaluate the Intraventricular Impedance Imaging (III) system performance. Such an approach eliminates numerous problems associated with in vivo testing. This paper presents the results of such a modeling technique. The intraventricular probe positioning was realized as 3-D probe movement (static) or/and cardiac volume variation (dynamic), using hardware and/or software control modes. A ventricle imaging model was built using a 3-compartment simulator representing the blood, myocardium and lungs. Experimental results show that the model provides a static positioning resolution of 0.01-0.15 mm, dynamic volumetric resolution of 0.08 ml, and phantom resistivity contrast for blood:myocardium:lungs of 1:3.4:7.3.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116834756","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
Simulation and optimization of basic movements in FES-driven paraplegics fes驱动截瘫患者基本动作的仿真与优化
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513721
M. Puri, S. Wolpert
{"title":"Simulation and optimization of basic movements in FES-driven paraplegics","authors":"M. Puri, S. Wolpert","doi":"10.1109/NEBC.1995.513721","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513721","url":null,"abstract":"In this study, a computer platform for investigating optimal trajectories of FES-induced motion was developed. Similar to a gait analysis program, this system interprets body segment lengths and joint angle trajectories for a subject undergoing an arbitrary movement, and displays that movement, along with a center of mass and time plot of the moment about the knee joint on-screen. Movements to be optimized in the near term are sit-to-stand transitions, stand-to-sit transitions, shifting weight side-to-side while seated, and single steps over small architectural barriers. These motions will be optimized for stability, efficiency, safety, and stress, as applied to a T-10 paraplegic human subject undergoing FNS of ten motor nerves in each leg. The program was demonstrated to work for sit-to-stand and stand-to-sit motions, and is now used to optimize those transitions.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124410230","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: 1
Breath detection and tracking for efficient oxygen therapy 呼吸检测和追踪用于高效氧疗
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513748
C. Dietz, P. Dietz
{"title":"Breath detection and tracking for efficient oxygen therapy","authors":"C. Dietz, P. Dietz","doi":"10.1109/NEBC.1995.513748","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513748","url":null,"abstract":"Discusses the algorithms developed for use in the Halatus 1 which tracks breathing patterns and dispenses oxygen only during inhalation. The approach has many advantages over continuous oxygen flow and existing oxygen conservation techniques.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125834369","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
Detection of hypovolemia using short-time Fourier transform analysis of S1 heart sounds 利用短时傅立叶变换分析S1心音检测低血容量
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513755
Wensheng Fan, D.H. Brooks, J. Mandel, I. Calalang, J. Philip
{"title":"Detection of hypovolemia using short-time Fourier transform analysis of S1 heart sounds","authors":"Wensheng Fan, D.H. Brooks, J. Mandel, I. Calalang, J. Philip","doi":"10.1109/NEBC.1995.513755","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513755","url":null,"abstract":"We present preliminary findings from applying the short-time spectral analysis to intra-operatively recorded heart sound signals. The goal is to detect hypovolemia as revealed by changes in the S1 and S4 heart sound. We present a statistic based on the temporal distribution of energy bursts as a candidate classification feature.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122559641","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: 1
Analytical prediction and numerical confirmation of deep focused microwave hyperthermia in a human head 人脑深部聚焦微波热疗的分析预测与数值验证
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513756
C. Rappaport, D. Dunn
{"title":"Analytical prediction and numerical confirmation of deep focused microwave hyperthermia in a human head","authors":"C. Rappaport, D. Dunn","doi":"10.1109/NEBC.1995.513756","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513756","url":null,"abstract":"By carefully selecting the electric field distribution around the entire surface of a human head, it is possible to generate a tightly-focused global power maximum at the deepest point within the brain. An analytic prediction of the optimum volume field distribution in a layered concentric head model is derived based on spherical harmonics, and a three-dimensional finite difference time domain (FDTD) computation using the corresponding source field for a discretized, MRI-based head model gives a very similar dissipated power distribution. This study demonstrates that microwave hyperthermia can be a feasible cancer treatment modality for tumors in the head, providing a well-resolved \"hotspot\" at depth without overheating any other healthy tissue.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115304012","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
Isotropic and homogeneous approximation of myocardial tissue resistivity behavior 心肌组织电阻率行为的各向同性和均匀近似
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513716
S. Rao, S. Kun, R. Peura
{"title":"Isotropic and homogeneous approximation of myocardial tissue resistivity behavior","authors":"S. Rao, S. Kun, R. Peura","doi":"10.1109/NEBC.1995.513716","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513716","url":null,"abstract":"The goal of this work is to develop a mathematical model that was accurately predict the best fit parameters and errors to be encountered in the simplification of the anisotropic and inhomogeneous electrical characteristics of the cardiac muscle to an isotropic and homogeneous tissue equivalent. A numerical model based on the finite difference method developed and validated for description of skeletal muscle (anisotropic) resistivity behavior. It was expanded and used to simulate the resistivity behavior of myocardial samples at different levels of anisotropy and inhomogeneity. The results obtained from this investigation indicate that for realistic geometries of cardiac muscle, isotropization and homogenization simplification error is less than 0.5 /spl Omega/-m. This prediction is based on the simulated results obtained with the incorporation of relevant physiological and morphological information on the tissue into the numerical model.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133689825","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: 1
Change in hydroxyapatite coating crystallinity after culture with osteoblasts 成骨细胞培养后羟基磷灰石涂层结晶度的变化
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513729
M. C. Melican, K. Gross, C. Berndt, S. Maxian
{"title":"Change in hydroxyapatite coating crystallinity after culture with osteoblasts","authors":"M. C. Melican, K. Gross, C. Berndt, S. Maxian","doi":"10.1109/NEBC.1995.513729","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513729","url":null,"abstract":"Enhanced bone attachment to orthopaedic implants is obtained with the use of bioactive hydroxyapatite (HA) coatings. Osteoblast cells attached to both low and high crystalline HA coatings, and did not significantly change the morphology of the surfaces. Significant changes in coating chemistry took place in both low and high crystalline coatings as evidenced by the changes in the X-ray spectra of the two materials. This in vitro study had different influences on the two coating types: the low crystalline HA coating lost amorphous material and increased in crystallinity over the 14 days, while the high crystalline HA coating had a decreasing crystallinity over the same time period. The crystallographic changes taking place in the HA coatings between 7 and 14 days need to be further investigated.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132778575","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: 2
SERAC project: applications of robotics to physical rehabilitation (preliminary results) SERAC项目:机器人技术在物理康复中的应用(初步成果)
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513725
P. Curtiss, K.L. Colbo, J. McGillis
{"title":"SERAC project: applications of robotics to physical rehabilitation (preliminary results)","authors":"P. Curtiss, K.L. Colbo, J. McGillis","doi":"10.1109/NEBC.1995.513725","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513725","url":null,"abstract":"Medical robotics is an emerging area within bioengineering and clinical medicine. Medical robots are being used more and more to assist in a variety of surgical and clinical settings, and the application of medical robotics to the rehabilitative sciences seems to be growing within the literature. Here, the authors explore using a robotic articulation to assist in the treatment of dysfunctional human movement of the upper and lower extremities. They describe their approach and the resulting prototype, and they examine other current research efforts in which robotics is being applied in a rehabilitative setting. Future work on the prototypes being developed at Multi-Dimensional Movement Systems is discussed.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":" 67","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113948673","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: 1
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