Pub Date : 2015-06-25DOI: 10.1109/SAS.2015.7133647
Slaven Glumac, D. Arbula, Z. Kovačić
An algorithm for solving a sensor localization problem on a low-cost microcontroller platform is presented in this paper. Localization is described as an optimization problem and the use of microimmune algorithm (μIA) is proposed for solving it. The presented design of μIA is able to perform under restricted memory capacity of a majority of standard low-cost microcontroller platforms. A microimmune optimization approach was compared to a closed form solution using subspace techniques and based on the simulation experiments, a comparable quality of both optimization approaches was obtained.
{"title":"Microimmune algorithm for sensor network localization","authors":"Slaven Glumac, D. Arbula, Z. Kovačić","doi":"10.1109/SAS.2015.7133647","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133647","url":null,"abstract":"An algorithm for solving a sensor localization problem on a low-cost microcontroller platform is presented in this paper. Localization is described as an optimization problem and the use of microimmune algorithm (μIA) is proposed for solving it. The presented design of μIA is able to perform under restricted memory capacity of a majority of standard low-cost microcontroller platforms. A microimmune optimization approach was compared to a closed form solution using subspace techniques and based on the simulation experiments, a comparable quality of both optimization approaches was obtained.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124192299","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 : 2015-06-25DOI: 10.1109/SAS.2015.7133594
Krongboon Singhanat, Teng Jiang, G. Merrett, N. Harris
Cooperation between co-located Wireless Sensor Networks (WSNs) has the potential to present new opportunities for novel applications and provide network performance improvements. The traditional interconnection approach for WSNs is based on a backbone network such as the Internet, but this may have intermittent or unavailable connectivity in remote locations. To address this, Opportunistic Direct Interconnection (ODI) has been proposed to allow distinct and independent WSNs to communicate directly with neighbouring networks, and OI-MAC is a link-layer protocol which implements this functionality. However, OI-MAC has not been experimentally validated, instead with analysis performed through simulation. In this paper, we present a practical implementation of OI-MAC using two separate multi-hop networks with 6 sensor nodes in each. We validate its effective operation through experimentally obtained timing diagrams, sensor data output, and energy consumption. Results show successful cross-network packet communication, while networks remain independent by maintaining individual configurations and communication channels. Furthermore, we show that the process of discovering neighbouring networks has an insignificant impact on energy consumption.
{"title":"Empirical evaluation of OI-MAC: Direct interconnection between wireless sensor networks for collaborative monitoring","authors":"Krongboon Singhanat, Teng Jiang, G. Merrett, N. Harris","doi":"10.1109/SAS.2015.7133594","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133594","url":null,"abstract":"Cooperation between co-located Wireless Sensor Networks (WSNs) has the potential to present new opportunities for novel applications and provide network performance improvements. The traditional interconnection approach for WSNs is based on a backbone network such as the Internet, but this may have intermittent or unavailable connectivity in remote locations. To address this, Opportunistic Direct Interconnection (ODI) has been proposed to allow distinct and independent WSNs to communicate directly with neighbouring networks, and OI-MAC is a link-layer protocol which implements this functionality. However, OI-MAC has not been experimentally validated, instead with analysis performed through simulation. In this paper, we present a practical implementation of OI-MAC using two separate multi-hop networks with 6 sensor nodes in each. We validate its effective operation through experimentally obtained timing diagrams, sensor data output, and energy consumption. Results show successful cross-network packet communication, while networks remain independent by maintaining individual configurations and communication channels. Furthermore, we show that the process of discovering neighbouring networks has an insignificant impact on energy consumption.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"135 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125808572","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133580
F. Thürk, S. Kampusch, E. Kaniušas
A centralized framework for management of hybrid biosignals is proposed in order to design experimental studies, store hybrid biosignals and the associated metadata, view, validate, synchronize, and evaluate all data in a flexible and obvious way. Different studies performed at different times with different subjects, physiological maneuvers, applied devices and heterogeneous biosignals require a strategic and centralized framework to offer an individualized perspective on available data for a researcher to answer current research-related questions. Especially, administration of metadata of different studies and performed experiments require this centralized approach. When considering biomedical studies with large data quantities accumulated by regionally separated teams, data synchronization and their consistency inspection can significantly increase global efforts and thus costs and duration of scientific projects. For the first time, we present a server-client based design that enables users (researchers) to easily manage recorded data and the related meta-information via a website or client software. A prototype is already implemented as a first proof of concept.
{"title":"Strategic framework for management of hybrid biosignals from study design to statistics","authors":"F. Thürk, S. Kampusch, E. Kaniušas","doi":"10.1109/SAS.2015.7133580","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133580","url":null,"abstract":"A centralized framework for management of hybrid biosignals is proposed in order to design experimental studies, store hybrid biosignals and the associated metadata, view, validate, synchronize, and evaluate all data in a flexible and obvious way. Different studies performed at different times with different subjects, physiological maneuvers, applied devices and heterogeneous biosignals require a strategic and centralized framework to offer an individualized perspective on available data for a researcher to answer current research-related questions. Especially, administration of metadata of different studies and performed experiments require this centralized approach. When considering biomedical studies with large data quantities accumulated by regionally separated teams, data synchronization and their consistency inspection can significantly increase global efforts and thus costs and duration of scientific projects. For the first time, we present a server-client based design that enables users (researchers) to easily manage recorded data and the related meta-information via a website or client software. A prototype is already implemented as a first proof of concept.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115004715","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133577
Birutė Paliakaitė, S. Daukantas, A. Sakalauskas, V. Marozas
Long-term periodic monitoring of cardiovascular function in unobtrusive way has been a challenge in sensor research lately. This work presents the investigation of the method for pulse arrival time (PAT) estimation using body composition scales. It employs the electrocardiogram and the impedance plethysmogram (IPG) which are recorded from palm and plantar electrodes already integrated into body composition scales. Four subjects were involved in the experiment. The IPG was acquired from a single-foot and foot-to-foot and compared to the reference method - photoplethysmography. The range of correlation coefficient obtained in different methods varied from 0.7 to 0.94 showing that small PAT variations can be tracked using the IPG signals. Such results suggest that body composition scales could be supplemented with additional parameter for the assessment of arterial stiffness. This function will make them truly multi-parametric device for periodic health monitoring at home.
{"title":"Estimation of pulse arrival time using impedance plethysmogram from body composition scales","authors":"Birutė Paliakaitė, S. Daukantas, A. Sakalauskas, V. Marozas","doi":"10.1109/SAS.2015.7133577","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133577","url":null,"abstract":"Long-term periodic monitoring of cardiovascular function in unobtrusive way has been a challenge in sensor research lately. This work presents the investigation of the method for pulse arrival time (PAT) estimation using body composition scales. It employs the electrocardiogram and the impedance plethysmogram (IPG) which are recorded from palm and plantar electrodes already integrated into body composition scales. Four subjects were involved in the experiment. The IPG was acquired from a single-foot and foot-to-foot and compared to the reference method - photoplethysmography. The range of correlation coefficient obtained in different methods varied from 0.7 to 0.94 showing that small PAT variations can be tracked using the IPG signals. Such results suggest that body composition scales could be supplemented with additional parameter for the assessment of arterial stiffness. This function will make them truly multi-parametric device for periodic health monitoring at home.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116121020","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133568
Omar A. Abdel Rehim, J. L. Davidson, L. A. Marsh, M. O’Toole, D. Armitage, A. Peyton
This paper presents an apparatus to measure the spectroscopic magnetic response of small metallic objects and deduce the magnetic polarizability tensor. The measured transimpedances of a .222 Remington rifle cartridge and titanium cube are compared to simulated results and are found to match well providing verification of the method. The eigenvalues of the two objects are calculated and discussed highlighting the potential discriminatory aspect. The results support the proposed use of the eigenvalue spectra to provide subsurface classification and discrimination between landmines and clutter.
{"title":"Measurement system for determining the magnetic polarizability tensor of small metal targets","authors":"Omar A. Abdel Rehim, J. L. Davidson, L. A. Marsh, M. O’Toole, D. Armitage, A. Peyton","doi":"10.1109/SAS.2015.7133568","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133568","url":null,"abstract":"This paper presents an apparatus to measure the spectroscopic magnetic response of small metallic objects and deduce the magnetic polarizability tensor. The measured transimpedances of a .222 Remington rifle cartridge and titanium cube are compared to simulated results and are found to match well providing verification of the method. The eigenvalues of the two objects are calculated and discussed highlighting the potential discriminatory aspect. The results support the proposed use of the eigenvalue spectra to provide subsurface classification and discrimination between landmines and clutter.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122022793","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133641
J. Makkonen, L. A. Marsh, J. Vihonen, M. O’Toole, D. Armitage, Ari Jarvi, A. Peyton, A. Visa
A walk-through metal detector system has been used for measuring the magnetic polarisability tensor for a variety of metallic objects. We propose a method for classifying objects by their metallic composition using features of the tensor. Furthermore, we investigate the potential of using the tensor representation as an indication geometric properties of the object. The method used is shown to be accurate for classification of material composition. Furthermore, the results suggest that it is possible to use the tensor to distinguish between similar objects of different sizes in limited scenarios. These findings demonstrate the potential for this method, but also suggest the need for further studies.
{"title":"Determination of material and geometric properties of metallic objects using the magnetic polarisability tensor","authors":"J. Makkonen, L. A. Marsh, J. Vihonen, M. O’Toole, D. Armitage, Ari Jarvi, A. Peyton, A. Visa","doi":"10.1109/SAS.2015.7133641","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133641","url":null,"abstract":"A walk-through metal detector system has been used for measuring the magnetic polarisability tensor for a variety of metallic objects. We propose a method for classifying objects by their metallic composition using features of the tensor. Furthermore, we investigate the potential of using the tensor representation as an indication geometric properties of the object. The method used is shown to be accurate for classification of material composition. Furthermore, the results suggest that it is possible to use the tensor to distinguish between similar objects of different sizes in limited scenarios. These findings demonstrate the potential for this method, but also suggest the need for further studies.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114698026","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133640
G. Goodfellow, J. Neasham, Ivor Rendulic, D. Nad, N. Mišković
This paper describes the DiverNet system that allows real time reconstruction of diver's posture and its visualization using a virtual 3D model. DiverNet is a network consisting of 17 inertial sensors mounted on diver's body, enabling calculation of orientation of each body part. Based on the obtained data, diver posture can be visualized. In addition to that, DiverNet allows integration of additional sensors for measuring physiological parameters such as breathing rate. This is the first time such technology is used in the underwater. Obtained data will be used to increase diver safety by monitoring the diver in real time, as well as developing tools for understanding diver behaviour and automatically recognizing possible signs of trouble. The paper focuses on technical description of the developed system, as well as the software used for data analysis and visualization.
{"title":"DiverNet — A network of inertial sensors for real time diver visualization","authors":"G. Goodfellow, J. Neasham, Ivor Rendulic, D. Nad, N. Mišković","doi":"10.1109/SAS.2015.7133640","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133640","url":null,"abstract":"This paper describes the DiverNet system that allows real time reconstruction of diver's posture and its visualization using a virtual 3D model. DiverNet is a network consisting of 17 inertial sensors mounted on diver's body, enabling calculation of orientation of each body part. Based on the obtained data, diver posture can be visualized. In addition to that, DiverNet allows integration of additional sensors for measuring physiological parameters such as breathing rate. This is the first time such technology is used in the underwater. Obtained data will be used to increase diver safety by monitoring the diver in real time, as well as developing tools for understanding diver behaviour and automatically recognizing possible signs of trouble. The paper focuses on technical description of the developed system, as well as the software used for data analysis and visualization.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"90 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113933001","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133579
S. Kampusch, F. Thürk, E. Kaniušas, J. Szeles
Chronic diseases such as diabetes mellitus are usually associated with a dysregulation of autonomic state, i.e., an imbalanced sympathovagal activity. A reduced vagal tone promotes autonomic neuropathy, impaired microcirculatory perfusion and upregulated pro-inflammatory pathways. In case of peripheral tissue trauma this may lead to chronic foot ulcerations. As a counter measure, a targeted modulation of parasympathetic activity by percutaneous auricular vagus nerve stimulation may have beneficial effects on autonomic regulation in diabetics, and thus may improve wound condition. The present study reveals novel effects of this stimulation on autonomic modulation in healthy and diabetics, assessed by time and frequency domain measures of heart rate variability (HRV). Increased HRV in diabetics and healthy subjects in response to stimulation was observed (e.g., 101% and 57% increase in the median parasympathetic power, respectively). Modulation of total HRV, when corrected for changes in mean heart rate, differs significantly between both groups with more pronounced but delayed effects in diabetics. Presented results provide new evidence for potential beneficial effects of auricular vagus nerve stimulation on autonomic balance as a possible therapeutic approach in diabetic foot ulcerations.
{"title":"Autonomous nervous system modulation by percutaneous auricular vagus nerve stimulation: Multiparametric assessment and implications for clinical use in diabetic foot ulcerations","authors":"S. Kampusch, F. Thürk, E. Kaniušas, J. Szeles","doi":"10.1109/SAS.2015.7133579","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133579","url":null,"abstract":"Chronic diseases such as diabetes mellitus are usually associated with a dysregulation of autonomic state, i.e., an imbalanced sympathovagal activity. A reduced vagal tone promotes autonomic neuropathy, impaired microcirculatory perfusion and upregulated pro-inflammatory pathways. In case of peripheral tissue trauma this may lead to chronic foot ulcerations. As a counter measure, a targeted modulation of parasympathetic activity by percutaneous auricular vagus nerve stimulation may have beneficial effects on autonomic regulation in diabetics, and thus may improve wound condition. The present study reveals novel effects of this stimulation on autonomic modulation in healthy and diabetics, assessed by time and frequency domain measures of heart rate variability (HRV). Increased HRV in diabetics and healthy subjects in response to stimulation was observed (e.g., 101% and 57% increase in the median parasympathetic power, respectively). Modulation of total HRV, when corrected for changes in mean heart rate, differs significantly between both groups with more pronounced but delayed effects in diabetics. Presented results provide new evidence for potential beneficial effects of auricular vagus nerve stimulation on autonomic balance as a possible therapeutic approach in diabetic foot ulcerations.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132473287","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133628
D. Oletić, V. Bilas
Information on air-quality in urban environments is typically measured only at limited number of sites, due to cost of measurement of atmospheric concentrations of toxic gases (CO, NO2, SO2) within accuracy boundaries defined by regulative bodies. Low spatial resolution of the mentioned environmental parameters hinders their applications in localization of the air-pollution sources, traffic regulation or studies of chronic respiratory diseases related to personal pollution exposure. Thus, we propose complementing the existing air quality monitoring infrastructure by a network of mobile sensors enabling the citizens to participate in measurement (e.g. “crowdsensing”). In this paper, we present the design of such battery-powered, wearable sensor node, housing two electrochemical gas sensors, temperature, relative humidity and atmospheric pressure sensors, with Bluetooth connectivity. Electrical, mechanical and software design are shown. Next, sensor node was characterized by evaluating the sensing accuracy and the autonomy in laboratory conditions. Accuracy within ±1 °C, ±2% RH, ±2 hPa, and ±0.6 ppm CO is shown. Autonomy is estimated at 65 h. Preliminary results of the outdoor functional test are demonstrated.
{"title":"Design of sensor node for air quality crowdsensing","authors":"D. Oletić, V. Bilas","doi":"10.1109/SAS.2015.7133628","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133628","url":null,"abstract":"Information on air-quality in urban environments is typically measured only at limited number of sites, due to cost of measurement of atmospheric concentrations of toxic gases (CO, NO2, SO2) within accuracy boundaries defined by regulative bodies. Low spatial resolution of the mentioned environmental parameters hinders their applications in localization of the air-pollution sources, traffic regulation or studies of chronic respiratory diseases related to personal pollution exposure. Thus, we propose complementing the existing air quality monitoring infrastructure by a network of mobile sensors enabling the citizens to participate in measurement (e.g. “crowdsensing”). In this paper, we present the design of such battery-powered, wearable sensor node, housing two electrochemical gas sensors, temperature, relative humidity and atmospheric pressure sensors, with Bluetooth connectivity. Electrical, mechanical and software design are shown. Next, sensor node was characterized by evaluating the sensing accuracy and the autonomy in laboratory conditions. Accuracy within ±1 °C, ±2% RH, ±2 hPa, and ±0.6 ppm CO is shown. Autonomy is estimated at 65 h. Preliminary results of the outdoor functional test are demonstrated.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129969156","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 : 2015-04-13DOI: 10.1109/SAS.2015.7133566
E. Kaniušas, S. Kampusch, J. Szeles
Chronic incurable wounds comprise a severe problem in diabetics. Their healing is impaired by chronically imbalanced sympathovagal activity of the autonomous nervous system, leading to adverse immune response and reduced microcirculation in the periphery. A targeted modulation of the vagal activity can be reached by percutaneous electrical stimulation of the auricular vagus nerve. The present study reveals novel modulating effects of this stimulation on depth profiles of the peripheral blood oxygenation in diabetics and healthy subjects (for comparison), as objective markers related to wound healing. Applied optical sensors on the sole of foot and the big toe have revealed capillary-venous blood oxygenation profiles close to the skin surface (average depth 2mm), in deep tissues below the surface (8mm), and the average arterial oxygenation (in the toe), as well as the corresponding changes of these profiles in response to the vagus stimulation. In healthy subjects, the stimulation-related profiles have indicated their dependence on the foot skin temperature, whereas in diabetics the oxygenation in deep tissues has tended to increase during the stimulation. The results provide fundamental data on the depth-dependent peripheral effects of the auricular vagus stimulation, as being vitally important for an effective treatment of chronic diabetic wounds.
{"title":"Depth profiles of the peripheral blood oxygenation in diabetics and healthy subjects in response to auricular electrical stimulation: Auricular vagus nerve stimulation as a potential treatment for chronic wounds","authors":"E. Kaniušas, S. Kampusch, J. Szeles","doi":"10.1109/SAS.2015.7133566","DOIUrl":"https://doi.org/10.1109/SAS.2015.7133566","url":null,"abstract":"Chronic incurable wounds comprise a severe problem in diabetics. Their healing is impaired by chronically imbalanced sympathovagal activity of the autonomous nervous system, leading to adverse immune response and reduced microcirculation in the periphery. A targeted modulation of the vagal activity can be reached by percutaneous electrical stimulation of the auricular vagus nerve. The present study reveals novel modulating effects of this stimulation on depth profiles of the peripheral blood oxygenation in diabetics and healthy subjects (for comparison), as objective markers related to wound healing. Applied optical sensors on the sole of foot and the big toe have revealed capillary-venous blood oxygenation profiles close to the skin surface (average depth 2mm), in deep tissues below the surface (8mm), and the average arterial oxygenation (in the toe), as well as the corresponding changes of these profiles in response to the vagus stimulation. In healthy subjects, the stimulation-related profiles have indicated their dependence on the foot skin temperature, whereas in diabetics the oxygenation in deep tissues has tended to increase during the stimulation. The results provide fundamental data on the depth-dependent peripheral effects of the auricular vagus stimulation, as being vitally important for an effective treatment of chronic diabetic wounds.","PeriodicalId":384041,"journal":{"name":"2015 IEEE Sensors Applications Symposium (SAS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134422781","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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