Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752098
J. Kijonka, M. Penhaker, J. Cernohorský
Patient monitor modules have various inputs for vital function measurement. We can practice many of these measurements with some students in the laboratory of biomedical engineering. However, invasive blood pressure (IBP) measurement demonstration is impossible. This paper is dealing with design and realization of a programmable invasive blood pressure simulator. This device is able to generate programmable behavior of voltage signal with correspond to blood pressure curve. The user communication interface of the device allows choosing the type of generated signal by LCD and 4 push buttons. The wide spectrums of generated signals, which correspond to physiological or pathological blood pressure curves, are stored in a user programmable memory. The output connectors of the device can be directly connected to a patient monitor IBP module input. Invasive blood pressure measurement simulation for educational purposes and calibrating the patients monitors are the general usages of the developed device.
{"title":"Invasive blood pressure curves simulation device","authors":"J. Kijonka, M. Penhaker, J. Cernohorský","doi":"10.1109/MECBME.2011.5752098","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752098","url":null,"abstract":"Patient monitor modules have various inputs for vital function measurement. We can practice many of these measurements with some students in the laboratory of biomedical engineering. However, invasive blood pressure (IBP) measurement demonstration is impossible. This paper is dealing with design and realization of a programmable invasive blood pressure simulator. This device is able to generate programmable behavior of voltage signal with correspond to blood pressure curve. The user communication interface of the device allows choosing the type of generated signal by LCD and 4 push buttons. The wide spectrums of generated signals, which correspond to physiological or pathological blood pressure curves, are stored in a user programmable memory. The output connectors of the device can be directly connected to a patient monitor IBP module input. Invasive blood pressure measurement simulation for educational purposes and calibrating the patients monitors are the general usages of the developed device.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127627907","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752105
F. F. Sherif, Y. Kadah, M. El-Hefnawi
Influenza is one of the most important emerging and reemerging infectious diseases, causing high morbidity and mortality in communities (epidemic) and worldwide (pandemic). Here, Classification of human vs. non-human influenza, and subtyping of human influenza viral strains virus is done based on Profile Hidden Markov Models. The classical ways of determining influenza viral subtypes depend mainly on antigenic assays, which is time-consuming and not fully accurate. The introduced technique is much cheaper and faster, yet usually can still yield high accuracy. Multiple sequence alignments were done for all human HA subtypes (H1, H2, H3 and H5), and NA subtypes (N1 and N2), followed by profile-HMMs models generation, calibration and evaluation using the HMMER suite for each group. Subtyping accuracy of all HA and NA models achieved 100%, while host classification (human vs. non-human) has accuracies varied between (55.5% and 97.5%) according to HA subtype.
{"title":"Classification of human vs. non-human, and subtyping of human influenza viral strains using Profile Hidden Markov Models","authors":"F. F. Sherif, Y. Kadah, M. El-Hefnawi","doi":"10.1109/MECBME.2011.5752105","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752105","url":null,"abstract":"Influenza is one of the most important emerging and reemerging infectious diseases, causing high morbidity and mortality in communities (epidemic) and worldwide (pandemic). Here, Classification of human vs. non-human influenza, and subtyping of human influenza viral strains virus is done based on Profile Hidden Markov Models. The classical ways of determining influenza viral subtypes depend mainly on antigenic assays, which is time-consuming and not fully accurate. The introduced technique is much cheaper and faster, yet usually can still yield high accuracy. Multiple sequence alignments were done for all human HA subtypes (H1, H2, H3 and H5), and NA subtypes (N1 and N2), followed by profile-HMMs models generation, calibration and evaluation using the HMMER suite for each group. Subtyping accuracy of all HA and NA models achieved 100%, while host classification (human vs. non-human) has accuracies varied between (55.5% and 97.5%) according to HA subtype.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121913329","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752110
Gregoris Liasis, S. Petroudi
A method for the estimation of the breast contour in mammograms is presented. Segmentation of the breast region from the background is made difficult due to the fact that the compressed breast edge is mostly composed of adipose tissue that is radiolucent. The algorithm presented uses level sets to establish the corresponding skin-air boundary. An initial preprocessing procedure is performed where the image contrast is improved and the breast edge is enhanced. Artifacts, labels and noise are also removed from the mammogram. Following the breast boundary is identified using the level set formulation, by Chan and Vese, and the results are quantitatively evaluated against the radiologist's ground truth.
{"title":"Estimation of the skin-air interface in mammograms using level sets","authors":"Gregoris Liasis, S. Petroudi","doi":"10.1109/MECBME.2011.5752110","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752110","url":null,"abstract":"A method for the estimation of the breast contour in mammograms is presented. Segmentation of the breast region from the background is made difficult due to the fact that the compressed breast edge is mostly composed of adipose tissue that is radiolucent. The algorithm presented uses level sets to establish the corresponding skin-air boundary. An initial preprocessing procedure is performed where the image contrast is improved and the breast edge is enhanced. Artifacts, labels and noise are also removed from the mammogram. Following the breast boundary is identified using the level set formulation, by Chan and Vese, and the results are quantitatively evaluated against the radiologist's ground truth.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130328726","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752147
M. Hassan, N. Bushra, I. Haq, F. Ahmed
The importance of Noble prize winning “Patch Clamp Technique” is well documented. However, Patch Clamp Technique is very expensive and hence hinders research in developing countries. In this paper detection, processing and recording of ultra low current from induced cells by using transimpedence amplifier is described. The sensitivity of the proposed amplifier is in the range of femto amperes (fA). Capacitive-feedback is used with active load to obtain a 20MΩ transimpedance gain. The challenging task in designing includes achieving adequate performance in gain, noise immunity and stability. The circuit designed by the authors was able to measure current in the range of 300 fA to 100 pA. Adequate performance shown by the amplifier with different input current and outcome result was found to be within the acceptable error range. Results were recorded using LabView 8.5® for further research.
{"title":"Detection and processing of full channel ionic current through indigenized Patch Clamp Technique","authors":"M. Hassan, N. Bushra, I. Haq, F. Ahmed","doi":"10.1109/MECBME.2011.5752147","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752147","url":null,"abstract":"The importance of Noble prize winning “Patch Clamp Technique” is well documented. However, Patch Clamp Technique is very expensive and hence hinders research in developing countries. In this paper detection, processing and recording of ultra low current from induced cells by using transimpedence amplifier is described. The sensitivity of the proposed amplifier is in the range of femto amperes (fA). Capacitive-feedback is used with active load to obtain a 20MΩ transimpedance gain. The challenging task in designing includes achieving adequate performance in gain, noise immunity and stability. The circuit designed by the authors was able to measure current in the range of 300 fA to 100 pA. Adequate performance shown by the amplifier with different input current and outcome result was found to be within the acceptable error range. Results were recorded using LabView 8.5® for further research.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132458624","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752096
G. Catapano
In this paper, the evolution of design methods is briefly analyzed and discussed with reference to artificial organs intended to substitute for metabolic bodily functions. In the last seventy years, the methods of artificial organ design have evolved towards a more systematic approach that more and more accounts for biological issues (man-machine interfaces, biocompatibility issues, etc.) to the point that at the forefront of research the design paradigm is shifting from fully synthetic mechanical/electronic prostheses towards the development in vitro of tissue engineered replacement organs/tissues, where the artificial part is fully integrated with the biological counterpart. To keep up with this complex scenario, design methods have shifted: from an experiments-based to the methodical approach; from one to multiple objective functions; from focusing on one single process to multiple concurring processes, often differing in time and space scale; from seeking solutions consisting of one device to many coupled devices; from seeking a generic solution for all patients' needs to seeking personalized solutions for each patient, so that the patient should not adapt to an existing device or implant, but it is the device or implant that has to adapt to the patients' specific needs and circumstances. The impact of this evolution in design on the way courses in biomedical engineering are organized and taught in Europe is also briefly analyzed and discussed.
{"title":"Artificial organs design: Towards the integration of disciplines","authors":"G. Catapano","doi":"10.1109/MECBME.2011.5752096","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752096","url":null,"abstract":"In this paper, the evolution of design methods is briefly analyzed and discussed with reference to artificial organs intended to substitute for metabolic bodily functions. In the last seventy years, the methods of artificial organ design have evolved towards a more systematic approach that more and more accounts for biological issues (man-machine interfaces, biocompatibility issues, etc.) to the point that at the forefront of research the design paradigm is shifting from fully synthetic mechanical/electronic prostheses towards the development in vitro of tissue engineered replacement organs/tissues, where the artificial part is fully integrated with the biological counterpart. To keep up with this complex scenario, design methods have shifted: from an experiments-based to the methodical approach; from one to multiple objective functions; from focusing on one single process to multiple concurring processes, often differing in time and space scale; from seeking solutions consisting of one device to many coupled devices; from seeking a generic solution for all patients' needs to seeking personalized solutions for each patient, so that the patient should not adapt to an existing device or implant, but it is the device or implant that has to adapt to the patients' specific needs and circumstances. The impact of this evolution in design on the way courses in biomedical engineering are organized and taught in Europe is also briefly analyzed and discussed.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131771162","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752140
N. Al-Zubi, W. Al-Nuaimy, Mohammad Al-Hadidi
Hydrocephalus is an excessive accumulation of the cerebrospinal fluid (CSF) in the ventricles of the brain, without treatment it leads in brain damage. The usual treatment is a shunt procedure implanted into the ventricles of the brain to drain the excess fluid to another part of the body. Current shunts are controlled by a pressure dependent valve, while recent developed shunts are utilising mechatronic valves. Compared to the current differential pressure valves, mechatronic valves are regulated by time-based schedule rather than differential pressure across the valve. Therefore, it is important that this time schedule is chosen properly for each patient so that a normal ICP is preserved. Choosing proper time schedule for each patient is still one of the challenges facing the implementation of such valves. This work presents a new method to propose optimal valve time-schedule using an ICP dynamics model and patient's ICP traces, so that shunt valves can be configured accordingly. This method presents a precise and efficient way of how the ICP model can be utilised in evaluating the patient's ICP traces and hence proposing a personalised optimal valve time-schedule as a function of mean measured ICP for each individual patient that can keep the ICP within the normal levels.
{"title":"Personalised mechatronic valve time-schedule optimiser for hydrocephalus shunt","authors":"N. Al-Zubi, W. Al-Nuaimy, Mohammad Al-Hadidi","doi":"10.1109/MECBME.2011.5752140","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752140","url":null,"abstract":"Hydrocephalus is an excessive accumulation of the cerebrospinal fluid (CSF) in the ventricles of the brain, without treatment it leads in brain damage. The usual treatment is a shunt procedure implanted into the ventricles of the brain to drain the excess fluid to another part of the body. Current shunts are controlled by a pressure dependent valve, while recent developed shunts are utilising mechatronic valves. Compared to the current differential pressure valves, mechatronic valves are regulated by time-based schedule rather than differential pressure across the valve. Therefore, it is important that this time schedule is chosen properly for each patient so that a normal ICP is preserved. Choosing proper time schedule for each patient is still one of the challenges facing the implementation of such valves. This work presents a new method to propose optimal valve time-schedule using an ICP dynamics model and patient's ICP traces, so that shunt valves can be configured accordingly. This method presents a precise and efficient way of how the ICP model can be utilised in evaluating the patient's ICP traces and hence proposing a personalised optimal valve time-schedule as a function of mean measured ICP for each individual patient that can keep the ICP within the normal levels.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124335995","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752118
V. Rogalewicz, G. J. Verkerke, R. Reilly, G. Catapano
A characteristic feature of biomedical engineering is multidisciplinarity. Engineers from different branches have to work together with life sciences experts. Their working culture is different: they speak different languages, think different ways, and if they say the same, usually they have something entirely different in mind. Moreover, the world is shrinking and people experience working in a multicultural environment. However, working in a multicultural team brings problems and conflicts. There are barriers to communication. The problem is that students are generally not aware of all these differences. This ignorance often frustrates cooperation and makes it difficult, limiting the possible benefits. Considering this a serious problem, European Society of Engineering and Medicine organizes a summer school “Biomedical Engineering Teamwork” to give students an opportunity to work in multidisciplinary multicultural teams, and teach them to exchange ideas and benefit from different approaches.
{"title":"Multidisciplinary teamwork training for progress in developing and using medical technology","authors":"V. Rogalewicz, G. J. Verkerke, R. Reilly, G. Catapano","doi":"10.1109/MECBME.2011.5752118","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752118","url":null,"abstract":"A characteristic feature of biomedical engineering is multidisciplinarity. Engineers from different branches have to work together with life sciences experts. Their working culture is different: they speak different languages, think different ways, and if they say the same, usually they have something entirely different in mind. Moreover, the world is shrinking and people experience working in a multicultural environment. However, working in a multicultural team brings problems and conflicts. There are barriers to communication. The problem is that students are generally not aware of all these differences. This ignorance often frustrates cooperation and makes it difficult, limiting the possible benefits. Considering this a serious problem, European Society of Engineering and Medicine organizes a summer school “Biomedical Engineering Teamwork” to give students an opportunity to work in multidisciplinary multicultural teams, and teach them to exchange ideas and benefit from different approaches.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124038944","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752087
P. Gifani, H. Behnam, Ahmad Shalbaf, Z. Sani
Medical applications of ultrasound imaging have expanded enormously over the last two decades. De-noising is challenging issues for better medical interpretation and diagnosis on high volume of data sets in echocardiography. In this paper, manifold learning algorithm is applied on 2-D echocardiography images to discover the relationship between the frames of consecutive cycles of the heart motion. By this approach, each image is depicted by a point on reconstructed two-dimensional manifold by Isomap algorithm and similar points related to similar images according to the property of periodic heartbeat cycle stand together. Noise reduction is achieved by averaging similar images on reconstructed manifold. By comparing the proposed method with some common methods and according to qualitative expert's opinions, the proposed method has maximum noise reduction, minimum blurring and better contrast among the similar methods.
{"title":"Noise reduction of echocardiography images using Isomap algorithm","authors":"P. Gifani, H. Behnam, Ahmad Shalbaf, Z. Sani","doi":"10.1109/MECBME.2011.5752087","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752087","url":null,"abstract":"Medical applications of ultrasound imaging have expanded enormously over the last two decades. De-noising is challenging issues for better medical interpretation and diagnosis on high volume of data sets in echocardiography. In this paper, manifold learning algorithm is applied on 2-D echocardiography images to discover the relationship between the frames of consecutive cycles of the heart motion. By this approach, each image is depicted by a point on reconstructed two-dimensional manifold by Isomap algorithm and similar points related to similar images according to the property of periodic heartbeat cycle stand together. Noise reduction is achieved by averaging similar images on reconstructed manifold. By comparing the proposed method with some common methods and according to qualitative expert's opinions, the proposed method has maximum noise reduction, minimum blurring and better contrast among the similar methods.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126620759","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752122
Olga Malgina, E. Plesnik, A. Košir, J. Milenkovic, M. Zajc, J. Tasic
In this article, two algorithms are described that are suited for real-time biomedical signal compression. These being, Amplitude Threshold compression and SQ segment compression. Comparison of these methods with well known methods such as lossy Discrete Cosine Transform (DCT) and lossless Turning Point (TP) is shown. The compression method outputs were reconstructed using a cubic spline approximation and compared. The values of compression ratio (CR), percent mean square difference (PRD) and area criteria were chosen for method comparison. Here it is shown that the method presented here (Threshold, SQ segment) provide considerably lower CR values than the DCT method and slightly higher CR values than the TP method. However, the PRD value for both proposed methods is lower than the PRD values of reference methods DCT and TP.
{"title":"Methods for ECG signal compression with reconstruction via cubic spline approximation","authors":"Olga Malgina, E. Plesnik, A. Košir, J. Milenkovic, M. Zajc, J. Tasic","doi":"10.1109/MECBME.2011.5752122","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752122","url":null,"abstract":"In this article, two algorithms are described that are suited for real-time biomedical signal compression. These being, Amplitude Threshold compression and SQ segment compression. Comparison of these methods with well known methods such as lossy Discrete Cosine Transform (DCT) and lossless Turning Point (TP) is shown. The compression method outputs were reconstructed using a cubic spline approximation and compared. The values of compression ratio (CR), percent mean square difference (PRD) and area criteria were chosen for method comparison. Here it is shown that the method presented here (Threshold, SQ segment) provide considerably lower CR values than the DCT method and slightly higher CR values than the TP method. However, the PRD value for both proposed methods is lower than the PRD values of reference methods DCT and TP.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123723616","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}
Pub Date : 2011-04-19DOI: 10.1109/MECBME.2011.5752134
Soheil Kianzad, A. Amini, Soheil O. Karkouti
Using special tools at the end-effectors of Minimally Invasive Surgery (MIS) robots has an important role in building a simple and well controlled system that increases dexterity of surgeons. Having local, lightweight and powerful actuators at end-effectors could help to simplified wrist design and saving the number of degrees-of-freedom (DOFs). Shape Memory Alloy (SMA) actuators considered as good candidates and presented significant behaviors in producing the force needed for gripping. In order to have force and tactile information of gripper, local sensors are needed to give force feedback which helps to have control over wire tension and prevent exceeding force causing tissue damages. In this paper a novel design of forceps that uses antagonistic SMA actuators is presented. This configuration helps to increase force and speed and eliminates bias spring used in similar works. Moreover, this antagonistic design makes it possible to provide sensors needed for force control and place them at the back part of the forceps instead of attaching them to jaws which will result in a smaller forceps design. To control the exerted force, a force control method is also presented using the feedback obtained through the sensors. This enhanced design seems to address some of the existing shortcomings of similar models and remove them effectively.
{"title":"Force control of laparoscopy grasper using antagonistic shape memory alloy","authors":"Soheil Kianzad, A. Amini, Soheil O. Karkouti","doi":"10.1109/MECBME.2011.5752134","DOIUrl":"https://doi.org/10.1109/MECBME.2011.5752134","url":null,"abstract":"Using special tools at the end-effectors of Minimally Invasive Surgery (MIS) robots has an important role in building a simple and well controlled system that increases dexterity of surgeons. Having local, lightweight and powerful actuators at end-effectors could help to simplified wrist design and saving the number of degrees-of-freedom (DOFs). Shape Memory Alloy (SMA) actuators considered as good candidates and presented significant behaviors in producing the force needed for gripping. In order to have force and tactile information of gripper, local sensors are needed to give force feedback which helps to have control over wire tension and prevent exceeding force causing tissue damages. In this paper a novel design of forceps that uses antagonistic SMA actuators is presented. This configuration helps to increase force and speed and eliminates bias spring used in similar works. Moreover, this antagonistic design makes it possible to provide sensors needed for force control and place them at the back part of the forceps instead of attaching them to jaws which will result in a smaller forceps design. To control the exerted force, a force control method is also presented using the feedback obtained through the sensors. This enhanced design seems to address some of the existing shortcomings of similar models and remove them effectively.","PeriodicalId":348448,"journal":{"name":"2011 1st Middle East Conference on Biomedical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131329675","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}
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