Pub Date : 2015-05-07DOI: 10.1109/MeMeA.2015.7145234
R. B. Wallace, Michael Rockwood, R. Goubran, F. Knoefel, S. Marshall, M. Porter
This paper demonstrates the validity of vehicle acceleration/deceleration signals derived from 1Hz sampled GPS position and OBDII velocity sensors through comparison to 40Hz sampled accelerometer measurements. Measurement of driver acceleration and deceleration is important because it is a key measure of driving habits. Ideally, these measurements should not require the cost and complexity of installing dedicated accelerometers for long term studies when alternatives are available. The OBDII interface is built-in and GPS sensors can be easily deployed and both are shown to allow derivation of alternative acceleration signals. The results show a maximum average correlation of 0.810 between the GPS and the accelerometers and 0.808 between the OBDII and the accelerometer. This paper analyzes the effects of noise on each of the derivative difference equations and shows that the Central 2-point formula provides the best noise performance whereas the Central 4-point formula (correlation 0.801) would be expected to provide the best performance in a noise free signal. Forward/Backward 3-point are predicted to have similar performance to Central 2-point in noise free signals but are shown to have poor performance (correlation of 0.667 and 0.687 respectively) in the presence of noise.
{"title":"Measurement of vehicle acceleration in studies of older drivers from GPS position and OBDII velocity sensors","authors":"R. B. Wallace, Michael Rockwood, R. Goubran, F. Knoefel, S. Marshall, M. Porter","doi":"10.1109/MeMeA.2015.7145234","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145234","url":null,"abstract":"This paper demonstrates the validity of vehicle acceleration/deceleration signals derived from 1Hz sampled GPS position and OBDII velocity sensors through comparison to 40Hz sampled accelerometer measurements. Measurement of driver acceleration and deceleration is important because it is a key measure of driving habits. Ideally, these measurements should not require the cost and complexity of installing dedicated accelerometers for long term studies when alternatives are available. The OBDII interface is built-in and GPS sensors can be easily deployed and both are shown to allow derivation of alternative acceleration signals. The results show a maximum average correlation of 0.810 between the GPS and the accelerometers and 0.808 between the OBDII and the accelerometer. This paper analyzes the effects of noise on each of the derivative difference equations and shows that the Central 2-point formula provides the best noise performance whereas the Central 4-point formula (correlation 0.801) would be expected to provide the best performance in a noise free signal. Forward/Backward 3-point are predicted to have similar performance to Central 2-point in noise free signals but are shown to have poor performance (correlation of 0.667 and 0.687 respectively) in the presence of noise.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130917591","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145179
E. Schena, P. Saccomandi, C. Massaroni, V. Quattrocchi, G. Frauenfelder, F. Giurazza, S. Silvestri, M. Caponero, A. Polimadei
Monitoring of local temperature in tissue undergoing Laser Ablation (LA) could be particularly beneficial to optimize treatment outcomes. A number of both invasive and non-invasive thermometric techniques may be employed to perform this task. Among others, Fiber Bragg Grating (FBG) sensors show the following valuable characteristics for temperature monitoring during LA: good sensitivity and accuracy, and immunity from electromagnetic interferences. The main drawbacks are their intrinsic invasiveness and the sensitivity to strain, which can entail measurement error for respiratory and patient movements. The aim of this work is to experimental assess the characteristics of an FBG sensor, housed within a metallic needle, employed in temperature monitoring of tissue undergoing LA. The use of a metallic needle allows neglecting errors due to patient movements, but induces an increase in sensor response time and a temperature overestimation due to direct absorption of laser light by the needle. The proposed sensor is tested during LA of ex vivo swine livers, and the tissue temperature measured by the FBG housed within the needle is compared to the temperature measured by an FBG without needle. This comparison showed that the needle induces a temperature overestimation, strongly dependent on the distance between sensor and laser applicator (e.g., about 2 °C at 6 mm, 4.4 °C at 4 mm). Furthermore, the needle causes an increase of response time (about 140 ms vs 40 ms). Since this response time is sufficient for the particular application and the overestimation can be reduced by using different techniques of data processing, the use of a needle to protect FBG seems to be a feasible solution to overcome the concern related to patient movements.
{"title":"Temperature monitoring during Laser Ablation by FBG sensors encapsulated within a metallic needle: Experiments on healthy swine tissue","authors":"E. Schena, P. Saccomandi, C. Massaroni, V. Quattrocchi, G. Frauenfelder, F. Giurazza, S. Silvestri, M. Caponero, A. Polimadei","doi":"10.1109/MeMeA.2015.7145179","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145179","url":null,"abstract":"Monitoring of local temperature in tissue undergoing Laser Ablation (LA) could be particularly beneficial to optimize treatment outcomes. A number of both invasive and non-invasive thermometric techniques may be employed to perform this task. Among others, Fiber Bragg Grating (FBG) sensors show the following valuable characteristics for temperature monitoring during LA: good sensitivity and accuracy, and immunity from electromagnetic interferences. The main drawbacks are their intrinsic invasiveness and the sensitivity to strain, which can entail measurement error for respiratory and patient movements. The aim of this work is to experimental assess the characteristics of an FBG sensor, housed within a metallic needle, employed in temperature monitoring of tissue undergoing LA. The use of a metallic needle allows neglecting errors due to patient movements, but induces an increase in sensor response time and a temperature overestimation due to direct absorption of laser light by the needle. The proposed sensor is tested during LA of ex vivo swine livers, and the tissue temperature measured by the FBG housed within the needle is compared to the temperature measured by an FBG without needle. This comparison showed that the needle induces a temperature overestimation, strongly dependent on the distance between sensor and laser applicator (e.g., about 2 °C at 6 mm, 4.4 °C at 4 mm). Furthermore, the needle causes an increase of response time (about 140 ms vs 40 ms). Since this response time is sufficient for the particular application and the overestimation can be reduced by using different techniques of data processing, the use of a needle to protect FBG seems to be a feasible solution to overcome the concern related to patient movements.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"134 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125803440","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145244
G. Andria, A. Lanzolla, G. Cavallo, Giuseppe Russo, F. Marinosci, R. Incalzi, M. Benvenuto
The management of age related diseases is one of the most discussed and controverted topic in Healthcare policy: cost-efficient solutions are needed to reduce the economic impact on welfare systems and to improve the quality of life of the patients. This is particularly true for chronic diseases, in which a simple, but continuous monitoring of suitable functional parameters able to evaluate the patient status would allow a consistent reduction of hospitalizations. In this paper we present the experience derived from a “Living Lab”, a novel model of participated innovation in which the end-user plays a crucial role. We co-designed, implemented and tested a m-health solution for remote monitoring of physiological parameters directly from chronic patients' house according to a clinical protocol defined by healthcare professionals. For this aim set of parameters such as Blood Pressure, Body Weight, Heart Rate, Pulse Oximetry was measured and, if needed, the answers to a questionnaire. The proposed system allows to reduce the hospitalization rate and to increase the empowerment of the patient in the self-management of his chronic health condition.
{"title":"A novel approach for design and testing digital m-health applications","authors":"G. Andria, A. Lanzolla, G. Cavallo, Giuseppe Russo, F. Marinosci, R. Incalzi, M. Benvenuto","doi":"10.1109/MeMeA.2015.7145244","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145244","url":null,"abstract":"The management of age related diseases is one of the most discussed and controverted topic in Healthcare policy: cost-efficient solutions are needed to reduce the economic impact on welfare systems and to improve the quality of life of the patients. This is particularly true for chronic diseases, in which a simple, but continuous monitoring of suitable functional parameters able to evaluate the patient status would allow a consistent reduction of hospitalizations. In this paper we present the experience derived from a “Living Lab”, a novel model of participated innovation in which the end-user plays a crucial role. We co-designed, implemented and tested a m-health solution for remote monitoring of physiological parameters directly from chronic patients' house according to a clinical protocol defined by healthcare professionals. For this aim set of parameters such as Blood Pressure, Body Weight, Heart Rate, Pulse Oximetry was measured and, if needed, the answers to a questionnaire. The proposed system allows to reduce the hospitalization rate and to increase the empowerment of the patient in the self-management of his chronic health condition.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122400110","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145255
G. Genta, G. Barbato, R. Levi, M. Erriu, F. Pili
Measurement of periodontal pocket depth, a key step in detection and analysis of periodontal diseases, is frequently affected by substantial uncertainty. Estimation of distance between gingival margin and connective ligament, an apparently straightforward measurement task routinely performed with simple probes, entails a fairly complex pattern of single and combined effects. Layout of marks on probe affects readings, since, when interpolation is involved, operator's experience comes into the picture. Compliance of tissues at pocket bottom implies dependence of probe penetration from insertion force, whose control again is affected by operator's experience. Hazy definition of gingival margin further contributes to scatter in results, liable to lead to diagnostic mistakes and wrong therapeutic decisions. An investigation on measurement issues, aimed at identification of main factors affecting uncertainty in evaluation of pocket depth, was performed in vitro with an ad hoc device, developed in order to get traceability and evaluate reproducibility of measurements of pockets with different depths. Measurements were performed by operators with different experience and skill, using three types of periodontal probes currently in use. Results showed a different performance of the probes in terms both of bias and scatter. Occurrence of false positives and negatives were found to be strongly dependent upon operator experience.
{"title":"Measurement issues in probing depth evaluation of periodontal pockets","authors":"G. Genta, G. Barbato, R. Levi, M. Erriu, F. Pili","doi":"10.1109/MeMeA.2015.7145255","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145255","url":null,"abstract":"Measurement of periodontal pocket depth, a key step in detection and analysis of periodontal diseases, is frequently affected by substantial uncertainty. Estimation of distance between gingival margin and connective ligament, an apparently straightforward measurement task routinely performed with simple probes, entails a fairly complex pattern of single and combined effects. Layout of marks on probe affects readings, since, when interpolation is involved, operator's experience comes into the picture. Compliance of tissues at pocket bottom implies dependence of probe penetration from insertion force, whose control again is affected by operator's experience. Hazy definition of gingival margin further contributes to scatter in results, liable to lead to diagnostic mistakes and wrong therapeutic decisions. An investigation on measurement issues, aimed at identification of main factors affecting uncertainty in evaluation of pocket depth, was performed in vitro with an ad hoc device, developed in order to get traceability and evaluate reproducibility of measurements of pockets with different depths. Measurements were performed by operators with different experience and skill, using three types of periodontal probes currently in use. Results showed a different performance of the probes in terms both of bias and scatter. Occurrence of false positives and negatives were found to be strongly dependent upon operator experience.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126566624","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145191
P. Daponte, L. D. Vito, S. Rapuano, M. Riccio, F. Picariello
The paper proposes a new algorithm for the estimation of orientation of MARG (Magnetic, Angular Rate and Gravity) units, capable of compensating the influence of short-duration magnetic disturbances on the magnetometer, with application in motion tracking for rehabilitation. The proposed algorithm has been designed starting from a widely used low-complexity orientation estimation algorithm, based on the gradient descent minimization. The proposed algorithm has been validated by means of laboratory experiments, aimed at verifying its capability of correctly estimating orientation, by compensating the magnetic disturbances both in static and in dynamic conditions. The results of such experimental phase are presented and discussed in the paper.
{"title":"Compensating magnetic disturbances on MARG units by means of a low complexity data fusion algorithm","authors":"P. Daponte, L. D. Vito, S. Rapuano, M. Riccio, F. Picariello","doi":"10.1109/MeMeA.2015.7145191","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145191","url":null,"abstract":"The paper proposes a new algorithm for the estimation of orientation of MARG (Magnetic, Angular Rate and Gravity) units, capable of compensating the influence of short-duration magnetic disturbances on the magnetometer, with application in motion tracking for rehabilitation. The proposed algorithm has been designed starting from a widely used low-complexity orientation estimation algorithm, based on the gradient descent minimization. The proposed algorithm has been validated by means of laboratory experiments, aimed at verifying its capability of correctly estimating orientation, by compensating the magnetic disturbances both in static and in dynamic conditions. The results of such experimental phase are presented and discussed in the paper.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123068881","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145194
M. Frize, Jeff Gilchrist, Hasmik Martirosyan, E. Bariciak
Our previous research led to the development of mortality risk estimations for infants in the neonatal intensive care unit (NICU) using quality archived databases. A decision support system was created with a clinician module containing relevant patient information and a variety of outcome estimations; the PPADS (Physician-Parent Decision Support) tool also contains a module for parents with the aim to help them make joint decisions with physicians on the direction of care for their infant. New work developed the ANN-Builder which uses an open-source artificial neural network library that would enable handling real-time data streaming and automate the process of providing risk estimations of mortality. Additionally, the patient data and risk estimations were successfully integrated into the PPADS tool. The mortality estimations surpass the clinical expectations. The next and final step will be to replace missing values in the data and add alarms for major changes in the risk estimations provided by the system.
{"title":"Integration of outcome estimations with a clinical decision support system: Application in the neonatal intensive care unit (NICU)","authors":"M. Frize, Jeff Gilchrist, Hasmik Martirosyan, E. Bariciak","doi":"10.1109/MeMeA.2015.7145194","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145194","url":null,"abstract":"Our previous research led to the development of mortality risk estimations for infants in the neonatal intensive care unit (NICU) using quality archived databases. A decision support system was created with a clinician module containing relevant patient information and a variety of outcome estimations; the PPADS (Physician-Parent Decision Support) tool also contains a module for parents with the aim to help them make joint decisions with physicians on the direction of care for their infant. New work developed the ANN-Builder which uses an open-source artificial neural network library that would enable handling real-time data streaming and automate the process of providing risk estimations of mortality. Additionally, the patient data and risk estimations were successfully integrated into the PPADS tool. The mortality estimations surpass the clinical expectations. The next and final step will be to replace missing values in the data and add alarms for major changes in the risk estimations provided by the system.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125490275","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145167
Stephanie L. Bennett, R. Goubran, F. Knoefel
Thermal imaging is of value to medical professionals because of its low risk and non-invasive properties. While thermal imaging has been explored in the area of pressure ulcers, many relevant papers address existing pressure ulcers and few address the prevention of pressure ulcers. This paper aims to examine the potential of thermal imaging in the prevention of pressure ulcers by extracting temperature-based and region-based measurements from thermal images and quantifying thermal patterns. A subject was asked to press on a pressure sensor mat at two specified intensities, and a series of thermal images were taken before and after to track thermal behaviour. These images were subjected to standard image processing techniques before temperature specific contour and area measurements were extracted as well as region specific intensity and weighted centroid measurements. Results indicated that the contour and area measurements were able to capture the temperature pattern of the whole hand, while the intensity measurements were able to indicate region specific thermal patterns. These results suggest that the extraction of measurements from a series of thermal images can capture and quantify visually identifiable thermal patterns of the hand over time. These findings will be expanded upon in future work by further examining different measurements, sharper images, different equipment and the involvement of elderly patients. While future collection of patient data is expected to yield different thermal patterns, this paper has demonstrated recognition and quantification of a pattern, regardless of the pattern itself.
{"title":"Measurements of change in thermal images due to applied pressure","authors":"Stephanie L. Bennett, R. Goubran, F. Knoefel","doi":"10.1109/MeMeA.2015.7145167","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145167","url":null,"abstract":"Thermal imaging is of value to medical professionals because of its low risk and non-invasive properties. While thermal imaging has been explored in the area of pressure ulcers, many relevant papers address existing pressure ulcers and few address the prevention of pressure ulcers. This paper aims to examine the potential of thermal imaging in the prevention of pressure ulcers by extracting temperature-based and region-based measurements from thermal images and quantifying thermal patterns. A subject was asked to press on a pressure sensor mat at two specified intensities, and a series of thermal images were taken before and after to track thermal behaviour. These images were subjected to standard image processing techniques before temperature specific contour and area measurements were extracted as well as region specific intensity and weighted centroid measurements. Results indicated that the contour and area measurements were able to capture the temperature pattern of the whole hand, while the intensity measurements were able to indicate region specific thermal patterns. These results suggest that the extraction of measurements from a series of thermal images can capture and quantify visually identifiable thermal patterns of the hand over time. These findings will be expanded upon in future work by further examining different measurements, sharper images, different equipment and the involvement of elderly patients. While future collection of patient data is expected to yield different thermal patterns, this paper has demonstrated recognition and quantification of a pattern, regardless of the pattern itself.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120873344","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145280
E. Angelini, B. Benedetti, D. Fulginiti, S. Grassini, F. Ferraris, M. Parvis
The use of temporary implants, which is widely diffused in orthopedic surgery requires surgical procedures to remove the implants after bone healing. A bioresorbable implant, which does not need to be surgically removed, would reduce both patient morbidity and risks of future diseases. Thanks to their biocompatibility, magnesium and its alloys have been proposed for self-degrading implants; moreover, Mg-based implants with a porous structure can stimulate the bone growth. This paper describes the preliminary results obtained by employing Spark Plasma Sintering (SPS) to produce a magnesium foam with a porosity able to stimulate the bone growth.
{"title":"Development and characterization of porous magnesium bioresorbable implants","authors":"E. Angelini, B. Benedetti, D. Fulginiti, S. Grassini, F. Ferraris, M. Parvis","doi":"10.1109/MeMeA.2015.7145280","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145280","url":null,"abstract":"The use of temporary implants, which is widely diffused in orthopedic surgery requires surgical procedures to remove the implants after bone healing. A bioresorbable implant, which does not need to be surgically removed, would reduce both patient morbidity and risks of future diseases. Thanks to their biocompatibility, magnesium and its alloys have been proposed for self-degrading implants; moreover, Mg-based implants with a porous structure can stimulate the bone growth. This paper describes the preliminary results obtained by employing Spark Plasma Sintering (SPS) to produce a magnesium foam with a porosity able to stimulate the bone growth.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130210254","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145203
R. Vallascas
From the comparison of the data available in the field literature, it follows that the range of oscillometric ratios is quite extensive, with an interval of 20% for systolic and around 30% for diastolic blood pressure. For example Geddes [8] states that these may range from 0.45 to 0.57 for systolic and from 0.75 to 0.86 for diastolic. Current commercial devices were not designed to perform the task of calculating these oscillometric ratios, and they utilize average values set for all measurements regardless of the physiological characteristics of the individual user and the yielding of the cuff used. While, as noted, oscillometric ratios are unique to each user as they contain much individual and operational information, such as cuff pulsatility, physiology of the measurement site, environmental conditions and the clinician's ability in performing the measurement. Hence, the need to revise current standards by making more restrictive rules is clear. In the author's opinion, this innovative solution has the special features providing greater accuracy in the measurement of systolic and diastolic pressures, and simulations and preliminary clinical trials have confirmed this. The work is devoted to both the presentation of the pressure Holter prototype and to the communication of results obtained during the characterization of the methodology and the algorithms used. Validation involved 33 subjects (22 men and 11 women) aged between 23 and 82 years, with arm circumferences from 21 to 41 cm, with systolic blood pressure (PSYS) in the 94 ÷ 204 mmHg range and diastolic (PDIA) 49÷106 mmHg. The results largely satisfy the requirements of the Protocol AAMI SP-10.
{"title":"A new arterial blood pressure Holter based on the oscillometric method","authors":"R. Vallascas","doi":"10.1109/MeMeA.2015.7145203","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145203","url":null,"abstract":"From the comparison of the data available in the field literature, it follows that the range of oscillometric ratios is quite extensive, with an interval of 20% for systolic and around 30% for diastolic blood pressure. For example Geddes [8] states that these may range from 0.45 to 0.57 for systolic and from 0.75 to 0.86 for diastolic. Current commercial devices were not designed to perform the task of calculating these oscillometric ratios, and they utilize average values set for all measurements regardless of the physiological characteristics of the individual user and the yielding of the cuff used. While, as noted, oscillometric ratios are unique to each user as they contain much individual and operational information, such as cuff pulsatility, physiology of the measurement site, environmental conditions and the clinician's ability in performing the measurement. Hence, the need to revise current standards by making more restrictive rules is clear. In the author's opinion, this innovative solution has the special features providing greater accuracy in the measurement of systolic and diastolic pressures, and simulations and preliminary clinical trials have confirmed this. The work is devoted to both the presentation of the pressure Holter prototype and to the communication of results obtained during the characterization of the methodology and the algorithms used. Validation involved 33 subjects (22 men and 11 women) aged between 23 and 82 years, with arm circumferences from 21 to 41 cm, with systolic blood pressure (PSYS) in the 94 ÷ 204 mmHg range and diastolic (PDIA) 49÷106 mmHg. The results largely satisfy the requirements of the Protocol AAMI SP-10.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131082119","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 : 2015-05-07DOI: 10.1109/MeMeA.2015.7145214
Matthias Becker, K. Friese, Franz-Erich Wolter, N. Gellrich, H. Essig
Injuries of the bony orbit, which contains the eye, not only have aesthetic implications but also impair stereoscopic vision. Different techniques are used for surgical treatment. In this work we will present a tool that allows the reliable segmentation of the reconstructed and the unaffected orbit. For this we present a novel anterior closing that follows the clinical understanding of anatomy. To assist in the post-surgical evaluation, we suggest parameters with respect to clinically relevant regions (orbital floor, medial wall) and demonstrate a method to automatically determine them. We evaluate our methods on three clinical cases.
{"title":"Development of a reliable method for orbit segmentation & measuring","authors":"Matthias Becker, K. Friese, Franz-Erich Wolter, N. Gellrich, H. Essig","doi":"10.1109/MeMeA.2015.7145214","DOIUrl":"https://doi.org/10.1109/MeMeA.2015.7145214","url":null,"abstract":"Injuries of the bony orbit, which contains the eye, not only have aesthetic implications but also impair stereoscopic vision. Different techniques are used for surgical treatment. In this work we will present a tool that allows the reliable segmentation of the reconstructed and the unaffected orbit. For this we present a novel anterior closing that follows the clinical understanding of anatomy. To assist in the post-surgical evaluation, we suggest parameters with respect to clinically relevant regions (orbital floor, medial wall) and demonstrate a method to automatically determine them. We evaluate our methods on three clinical cases.","PeriodicalId":277757,"journal":{"name":"2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116483017","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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