Curtis M. Craig, Bradley A Drahos, Katelyn R. Schwieters, Nichole L. Morris, Mandi Lye, Timothy M. Kowalewski, Jack Norfleet, Mark V. Mazzeo
Female soldiers are at greater risk of injury and have higher death rates compared to male soldiers. Female casualties are underrepresented in existing training materials for battlefield medics and the patient simulators are often masculine in appearance. The current study assesses the suitability of a female retrofit for male patient simulators and explores the existence of disparities in treatment between male and female patient simulators among combat medic trainees. Thirty-six participants undergoing training at a U.S. Army Medical Simulation Training Center performed a series of basic procedures on both a male patient simulator and a similar patient simulator with a female retrofit. The chest seal procedure was video-recorded and coded for errors committed by the trainees and analyzed to determine whether the apparent gender and order of the patient simulators affected error likelihood and rate. The results indicated that gender and order did not affect the likelihood of optimal performance, but if trainees treated the female retrofitted patient simulator first, they tended to commit more errors. Therefore, the use of a female retrofit may be useful for providing parity in training for gender; however, the issue of gender disparities remains a pressing issue for medical device design and research.
{"title":"Evaluating Gender Differences in Treatment of Simulated Gunshot Wounds Using a Female Retrofit","authors":"Curtis M. Craig, Bradley A Drahos, Katelyn R. Schwieters, Nichole L. Morris, Mandi Lye, Timothy M. Kowalewski, Jack Norfleet, Mark V. Mazzeo","doi":"10.1115/dmd2022-1018","DOIUrl":"https://doi.org/10.1115/dmd2022-1018","url":null,"abstract":"\u0000 Female soldiers are at greater risk of injury and have higher death rates compared to male soldiers. Female casualties are underrepresented in existing training materials for battlefield medics and the patient simulators are often masculine in appearance. The current study assesses the suitability of a female retrofit for male patient simulators and explores the existence of disparities in treatment between male and female patient simulators among combat medic trainees. Thirty-six participants undergoing training at a U.S. Army Medical Simulation Training Center performed a series of basic procedures on both a male patient simulator and a similar patient simulator with a female retrofit. The chest seal procedure was video-recorded and coded for errors committed by the trainees and analyzed to determine whether the apparent gender and order of the patient simulators affected error likelihood and rate. The results indicated that gender and order did not affect the likelihood of optimal performance, but if trainees treated the female retrofitted patient simulator first, they tended to commit more errors. Therefore, the use of a female retrofit may be useful for providing parity in training for gender; however, the issue of gender disparities remains a pressing issue for medical device design and research.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126111495","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}
Additive manufacturing is a growing field, but its application in the fabrication of medical microdevices has not been fully explored. Traditionally, medical microdevices are manufactured via a combination of techniques such as photolithography, laser-cutting, and micromolding, which collectively have challenges such as multiple fabrication steps, limited design freedom, high fabrication cost, and significant fabrication time. Micro vat photopolymerization is presented here as an alternative method to produce four different microscale medical devices that have applications in microfluidics, drug delivery, and bioscaffolding. In terms of minimum feature size and resolution, the presented structures are comparable, if not superior, to literature quoted parts fabricated through conventional manufacturing methods. The fabrication steps, process parameters, design considerations, learnings, and future research directions are outlined.
{"title":"Additive Manufacturing of Medical Microdevices","authors":"Renc Saracaydin, S. Hara","doi":"10.1115/dmd2022-1042","DOIUrl":"https://doi.org/10.1115/dmd2022-1042","url":null,"abstract":"\u0000 Additive manufacturing is a growing field, but its application in the fabrication of medical microdevices has not been fully explored. Traditionally, medical microdevices are manufactured via a combination of techniques such as photolithography, laser-cutting, and micromolding, which collectively have challenges such as multiple fabrication steps, limited design freedom, high fabrication cost, and significant fabrication time. Micro vat photopolymerization is presented here as an alternative method to produce four different microscale medical devices that have applications in microfluidics, drug delivery, and bioscaffolding. In terms of minimum feature size and resolution, the presented structures are comparable, if not superior, to literature quoted parts fabricated through conventional manufacturing methods. The fabrication steps, process parameters, design considerations, learnings, and future research directions are outlined.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126170044","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}
A. M. M. Bulbul Chowdhury, Jinsai Cheng, Dylan Yu, Tao Shen
Robots for surgery and rehabilitation have emerged and are gaining popularity among patients and medical doctors with their obvious benefits, such as overcoming obstacles from human users’ physical restraints, reducing physicians’ workload, and enhancing the efficacy of medical treatment. The development of medical robots meets two challenges related to their special application environments, including sterilization hazards and size/weight limitation. Medical robots (e.g., surgical robots) usually need to have close contact with human skin or organs, which need to be sterilized. However, chemical or heat sterilization on the robots poses an inevitable risk of damage on the motors, sensors, and other electronic components. The size of the surgical robot needs to be compact to gain access to surgical sites. The rehabilitation robots that patients wear have to limit their size and weight. Wire-driven actuation is a potential solution to solve these issues by avoiding the use of bulky mechanical gears and links and locating the electronic components far away from the sterilization environment. This paper presents the development of a novel wire-driven universal joint for medical robot design. With its special structure, this robotic joint has self-decoupled kinematics which can simplify its control system and increase motion accuracy. Benchtop experiments are conducted to verify the functionality of this joint and the effectiveness of its self-decoupled kinematics.
{"title":"Development of a Self-Decoupled Wire-Driven Robotic Universal Joint Toward Medical Application","authors":"A. M. M. Bulbul Chowdhury, Jinsai Cheng, Dylan Yu, Tao Shen","doi":"10.1115/dmd2022-1016","DOIUrl":"https://doi.org/10.1115/dmd2022-1016","url":null,"abstract":"\u0000 Robots for surgery and rehabilitation have emerged and are gaining popularity among patients and medical doctors with their obvious benefits, such as overcoming obstacles from human users’ physical restraints, reducing physicians’ workload, and enhancing the efficacy of medical treatment. The development of medical robots meets two challenges related to their special application environments, including sterilization hazards and size/weight limitation. Medical robots (e.g., surgical robots) usually need to have close contact with human skin or organs, which need to be sterilized. However, chemical or heat sterilization on the robots poses an inevitable risk of damage on the motors, sensors, and other electronic components. The size of the surgical robot needs to be compact to gain access to surgical sites. The rehabilitation robots that patients wear have to limit their size and weight. Wire-driven actuation is a potential solution to solve these issues by avoiding the use of bulky mechanical gears and links and locating the electronic components far away from the sterilization environment. This paper presents the development of a novel wire-driven universal joint for medical robot design. With its special structure, this robotic joint has self-decoupled kinematics which can simplify its control system and increase motion accuracy. Benchtop experiments are conducted to verify the functionality of this joint and the effectiveness of its self-decoupled kinematics.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124595069","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}
Exoskeletons and robots have been used as a common practice to assist and automate rehabilitation exercises. Exoskeleton fitting and alignments are important factors and challenges that need to be addressed for smooth and safe operations and better outcomes. Such challenges often dictate the exoskeleton design approaches. Some focus on simplifying and mimicking human joints (joint-based) while others have a focus on a specific task (task-based), which does not need to align with the corresponding limb joint/s to generate the desired anatomical motion. In this study, the two design approaches are assessed in an elbow flexion-extension task. The muscle responses have been collected and compared with and without the exoskeletons. Based on 6 with no disability participants, the normalized Electromyography (EMG) RMS values are plotted. The plot profiles and magnitudes are used as a base to assess the exoskeleton alignment. For this specific task, the task-based exoskeleton has shown a profile closer to the one without exoskeleton with a relatively identical support as the joint-based one; the latter is evidenced through most subjects’ muscle response magnitudes. This preliminary data has shown a good methodology and insight towards the assessment of exoskeletons, but more human subject data is needed with different task combinations to further strengthen the findings.
{"title":"Assessment of Task and Joint-Based Exoskeleton Designs for Elbow Joint Rehabilitation","authors":"Pablo Delgado, Lieth Jaradat, Yimesker Yihun","doi":"10.1115/dmd2022-1034","DOIUrl":"https://doi.org/10.1115/dmd2022-1034","url":null,"abstract":"\u0000 Exoskeletons and robots have been used as a common practice to assist and automate rehabilitation exercises. Exoskeleton fitting and alignments are important factors and challenges that need to be addressed for smooth and safe operations and better outcomes. Such challenges often dictate the exoskeleton design approaches. Some focus on simplifying and mimicking human joints (joint-based) while others have a focus on a specific task (task-based), which does not need to align with the corresponding limb joint/s to generate the desired anatomical motion. In this study, the two design approaches are assessed in an elbow flexion-extension task. The muscle responses have been collected and compared with and without the exoskeletons. Based on 6 with no disability participants, the normalized Electromyography (EMG) RMS values are plotted. The plot profiles and magnitudes are used as a base to assess the exoskeleton alignment. For this specific task, the task-based exoskeleton has shown a profile closer to the one without exoskeleton with a relatively identical support as the joint-based one; the latter is evidenced through most subjects’ muscle response magnitudes. This preliminary data has shown a good methodology and insight towards the assessment of exoskeletons, but more human subject data is needed with different task combinations to further strengthen the findings.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132329098","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}
Dailen C. Brown, Hang-Ling Wu, Y. Satpathy, Jessica M. Gonzalez-Vargas, Haroula M. Tzamaras, Scarlett R. Miller, J. Moore
A Computer Vision enabled Smart Tray (CVST) was designed for use in medical training for Central Venous Catheterization (CVC). The effects of background color on the ability of the computer vision algorithm to distinguish between tools and the tray was investigated. In addition, the computer vision algorithm was evaluated for accuracy in tool detection. Results indicate that a white monochromatic background is the most useful for segregating background from medical tools, and the algorithm was successfully able to detect 5 different CVC tools both individually and as a group in various arrangements, even when tools overlapped or touched. When the system was in error, it was nearly always due to one tool which has a color similar to that of the background. The CVST shows promise as a CVC training tool and demonstrates that computer vision can be used to accurately detect medical tools.
{"title":"Computer Vision Enabled Smart Tray for Central Venous Catheterization Training","authors":"Dailen C. Brown, Hang-Ling Wu, Y. Satpathy, Jessica M. Gonzalez-Vargas, Haroula M. Tzamaras, Scarlett R. Miller, J. Moore","doi":"10.1115/dmd2022-1020","DOIUrl":"https://doi.org/10.1115/dmd2022-1020","url":null,"abstract":"\u0000 A Computer Vision enabled Smart Tray (CVST) was designed for use in medical training for Central Venous Catheterization (CVC). The effects of background color on the ability of the computer vision algorithm to distinguish between tools and the tray was investigated. In addition, the computer vision algorithm was evaluated for accuracy in tool detection. Results indicate that a white monochromatic background is the most useful for segregating background from medical tools, and the algorithm was successfully able to detect 5 different CVC tools both individually and as a group in various arrangements, even when tools overlapped or touched. When the system was in error, it was nearly always due to one tool which has a color similar to that of the background. The CVST shows promise as a CVC training tool and demonstrates that computer vision can be used to accurately detect medical tools.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126678221","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}
Regular cardiology practices were interrupted by the COVID-19 pandemic. To better understand the pandemic’s effects on cardiology practices, we investigated whether the pandemic affected reporting of cardiovascular medical device failure by examining whether adverse event reports per week attributed to different cardiovascular devices changed significantly during the pandemic. By using data from FDA’s MAUDE database, we compared weekly rates of adverse event reports over the course of three years attributed to each of four devices: ‘Implantable Cardioverter Defibrillator (Non-CRT)’, ‘Coronary Drug-Eluting Stent’, ‘Aortic Valve, Prosthesis, Percutaneously Delivered’, and ‘Heart Valve, Non-Allograft Tissue’. Specifically, we looked at trends per week for the adverse events 'Malfunction’, ‘Injury’, and ‘Death’ for March 2018-March 2019, the pre-pandemic year of March 2019-March 2020, and the pandemic year March 2020-March 2021. We report a 46% decrease in reported deaths attributed to ICDs, a 27% decrease in reported injuries attributed to coronary DES, a 107% increase in reported deaths and a 45% increase in reported malfunctions attributed to percutaneous aortic valve prostheses, as well as a 27% decrease in reported injuries attributed to non-allograft tissue heart valves (all comparisons pandemic to pre-pandemic). That these four cardiovascular medical devices did not homogeneously increase or decrease suggests that changing care patterns that differently affected each device were the root of these trends, rather than a broader factor like underreporting which one would expect to affect the devices similarly.
{"title":"Reported Device Failure and the Coronavirus Pandemic: Cardiovascular Interventions","authors":"E. Zhou, S. Bhatia","doi":"10.1115/dmd2022-1019","DOIUrl":"https://doi.org/10.1115/dmd2022-1019","url":null,"abstract":"\u0000 Regular cardiology practices were interrupted by the COVID-19 pandemic. To better understand the pandemic’s effects on cardiology practices, we investigated whether the pandemic affected reporting of cardiovascular medical device failure by examining whether adverse event reports per week attributed to different cardiovascular devices changed significantly during the pandemic. By using data from FDA’s MAUDE database, we compared weekly rates of adverse event reports over the course of three years attributed to each of four devices: ‘Implantable Cardioverter Defibrillator (Non-CRT)’, ‘Coronary Drug-Eluting Stent’, ‘Aortic Valve, Prosthesis, Percutaneously Delivered’, and ‘Heart Valve, Non-Allograft Tissue’. Specifically, we looked at trends per week for the adverse events 'Malfunction’, ‘Injury’, and ‘Death’ for March 2018-March 2019, the pre-pandemic year of March 2019-March 2020, and the pandemic year March 2020-March 2021. We report a 46% decrease in reported deaths attributed to ICDs, a 27% decrease in reported injuries attributed to coronary DES, a 107% increase in reported deaths and a 45% increase in reported malfunctions attributed to percutaneous aortic valve prostheses, as well as a 27% decrease in reported injuries attributed to non-allograft tissue heart valves (all comparisons pandemic to pre-pandemic). That these four cardiovascular medical devices did not homogeneously increase or decrease suggests that changing care patterns that differently affected each device were the root of these trends, rather than a broader factor like underreporting which one would expect to affect the devices similarly.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115168981","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}
Surgical treatment of kidney stones commonly involves ureteroscopic lithotripsy with laser-assisted stone fragmentations. Particles that remain are considered “clinically insignificant” and are left behind, though these fragments are associated with downstream complications such as infection and stone reformation. The researchers aimed to develop a novel hydrogel that would prevent stone retropulsion intraoperatively and facilitate complete fragment removal. A novel inversely thermosensitive gel was developed which would theoretically stay solid to surround kidney stone, suspend stone fragments and would become liquid for gel removal. The aim of this study was to better understand the gel delivery mechanism considering its unique thermal properties. It was hypothesized that due to the gel’s thermal properties, an active cooling method, i.e. an intracatheter cooled guide wire, would be necessary to maintain gel fluidity to reach the intended destination. The researchers designed an experiment to test gel delivery through a 5 French, 70 cm long catheter surrounded by body temperature water with and without a cooled guide wire. We found there was no significant difference between both trial groups, indicating the gel does not require an active cooling method and can be administered directly. The lack of easy-to-use and cost-effective commercially available options to effectively reduce residual stone fragments presents a path for clinical adoption of the proposed hydrogel. Future trials will look into the fluid mechanics of gel administration and potential clinical outcomes such as stone free rates and rates of complications.
{"title":"Novel Hydrogel for Stone Fragment Control During Ureteroscopic Lithotripsy","authors":"Rohan Bhattaram, Ryan J Reichert, Victoria Marino","doi":"10.1115/dmd2022-1052","DOIUrl":"https://doi.org/10.1115/dmd2022-1052","url":null,"abstract":"\u0000 Surgical treatment of kidney stones commonly involves ureteroscopic lithotripsy with laser-assisted stone fragmentations. Particles that remain are considered “clinically insignificant” and are left behind, though these fragments are associated with downstream complications such as infection and stone reformation. The researchers aimed to develop a novel hydrogel that would prevent stone retropulsion intraoperatively and facilitate complete fragment removal. A novel inversely thermosensitive gel was developed which would theoretically stay solid to surround kidney stone, suspend stone fragments and would become liquid for gel removal. The aim of this study was to better understand the gel delivery mechanism considering its unique thermal properties. It was hypothesized that due to the gel’s thermal properties, an active cooling method, i.e. an intracatheter cooled guide wire, would be necessary to maintain gel fluidity to reach the intended destination. The researchers designed an experiment to test gel delivery through a 5 French, 70 cm long catheter surrounded by body temperature water with and without a cooled guide wire. We found there was no significant difference between both trial groups, indicating the gel does not require an active cooling method and can be administered directly. The lack of easy-to-use and cost-effective commercially available options to effectively reduce residual stone fragments presents a path for clinical adoption of the proposed hydrogel. Future trials will look into the fluid mechanics of gel administration and potential clinical outcomes such as stone free rates and rates of complications.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"59 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120817509","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}
SARS-COV-2 vaccines, all of which are currently intramuscular shots, have the ability to prevent serious injury. However, the absence of sufficient mucosal immunity is a major concern. To counteract this deficiency that has led to continued transmission from vaccinated individuals and breakthrough cases, reformulating vaccines to be inhalable presents a logical administration route. Predecessor research has reported the inhalable route to be viable as aerosolized vaccine nanoparticles, AAV phage nanoparticles, and PIV-5 viruses were recently identified to elicit immune responses. In this study, the diffusion of vaccine nanoparticles across the mucosa is characterized and modeled, with respect to their observed behavior from previous studies in relation to the Stokes-Einstein equation, to predict the most efficient model of an inhalable COVID-19 vaccine. The Stokes-Einstein equation has been used in several studies to predict diffusion coefficients. These predictions may be modified to fit the specifications of mucosal interactions. It was determined that mucosal interactions play a significant role in vaccine nanoparticle diffusion, as demonstrated by the viral vector and virus-like nanoparticle diffusion, and can be characterized by an equivalent hydrodynamic radius. Moreover, as a counter to mucosal interactions, PEGylation was found to drastically decrease the viscous slowing of the mucus medium.
{"title":"Optimizing COVID-19 Vaccine Diffusion in Respiratory Mucosa through Stokes-Einstein Modeling","authors":"Richard T. Zhu, S. Bhatia","doi":"10.1115/dmd2022-1065","DOIUrl":"https://doi.org/10.1115/dmd2022-1065","url":null,"abstract":"\u0000 SARS-COV-2 vaccines, all of which are currently intramuscular shots, have the ability to prevent serious injury. However, the absence of sufficient mucosal immunity is a major concern. To counteract this deficiency that has led to continued transmission from vaccinated individuals and breakthrough cases, reformulating vaccines to be inhalable presents a logical administration route. Predecessor research has reported the inhalable route to be viable as aerosolized vaccine nanoparticles, AAV phage nanoparticles, and PIV-5 viruses were recently identified to elicit immune responses. In this study, the diffusion of vaccine nanoparticles across the mucosa is characterized and modeled, with respect to their observed behavior from previous studies in relation to the Stokes-Einstein equation, to predict the most efficient model of an inhalable COVID-19 vaccine. The Stokes-Einstein equation has been used in several studies to predict diffusion coefficients. These predictions may be modified to fit the specifications of mucosal interactions. It was determined that mucosal interactions play a significant role in vaccine nanoparticle diffusion, as demonstrated by the viral vector and virus-like nanoparticle diffusion, and can be characterized by an equivalent hydrodynamic radius. Moreover, as a counter to mucosal interactions, PEGylation was found to drastically decrease the viscous slowing of the mucus medium.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126406777","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}
Matthew McManigal, Renick Wilson, Patrick McManigal, Brooke Beran, E. Wellsandt, Eric J. Markvicka
Wearable electronics capable of measuring three-dimensional knee joint angle would provide new methods to predict both anterior cruciate ligament (ACL) injuries and the risk of developing early knee osteoarthritis. However, knee joint angle assessment is currently limited, due to the lack of validated wearable and untethered technologies that can be deployed in natural environments and rural or community settings. To address this challenge, we created a fully untethered, wearable electronic device to continuously measure knee joint angle using two inertial measurement unit (IMU) sensors. The wearable device is composed of a stretchable circuit assembled on a spandex-blend fabric substrate that allows the device to conform to the knee without restricting natural human movement. The fabric substrate allows the electronic circuit to be reused, while increasing the robustness of the device. Finally, we demonstrate the ability of the device to continuously measure sagittal plane knee joint angle during natural human movements outside of a laboratory environment.
{"title":"Fully Untethered and Stretchable Wearable Electronic Bandage for Measuring Knee Motion","authors":"Matthew McManigal, Renick Wilson, Patrick McManigal, Brooke Beran, E. Wellsandt, Eric J. Markvicka","doi":"10.1115/dmd2022-1026","DOIUrl":"https://doi.org/10.1115/dmd2022-1026","url":null,"abstract":"\u0000 Wearable electronics capable of measuring three-dimensional knee joint angle would provide new methods to predict both anterior cruciate ligament (ACL) injuries and the risk of developing early knee osteoarthritis. However, knee joint angle assessment is currently limited, due to the lack of validated wearable and untethered technologies that can be deployed in natural environments and rural or community settings. To address this challenge, we created a fully untethered, wearable electronic device to continuously measure knee joint angle using two inertial measurement unit (IMU) sensors. The wearable device is composed of a stretchable circuit assembled on a spandex-blend fabric substrate that allows the device to conform to the knee without restricting natural human movement. The fabric substrate allows the electronic circuit to be reused, while increasing the robustness of the device. Finally, we demonstrate the ability of the device to continuously measure sagittal plane knee joint angle during natural human movements outside of a laboratory environment.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127031607","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}
Brachytherapy is an internal radiation therapy method for prostate cancer that involves placement of radioactive seeds close to the cancerous cells. Robotic needle insertion systems have been proposed in the past to help physicians to improve outcomes of brachytherapy. This work presents design and development of a portable robotic brachytherapy system to operate a tendon-driven active needle based on physician’s input. The system enables manual positioning of the needle to choose appropriate puncture positions as well as robotic manipulation mechanisms for needle insertion and bending. The system also allows for automatic movement of an ultrasound probe to visualize the needle tip in a needle insertion task in real time.
{"title":"A Portable Robot to Perform Prostate Brachytherapy with Active Needle Steering and Robot-Assisted Ultrasound Tracking","authors":"Mahsa Rabiei, B. Konh","doi":"10.1115/dmd2022-1014","DOIUrl":"https://doi.org/10.1115/dmd2022-1014","url":null,"abstract":"\u0000 Brachytherapy is an internal radiation therapy method for prostate cancer that involves placement of radioactive seeds close to the cancerous cells. Robotic needle insertion systems have been proposed in the past to help physicians to improve outcomes of brachytherapy. This work presents design and development of a portable robotic brachytherapy system to operate a tendon-driven active needle based on physician’s input. The system enables manual positioning of the needle to choose appropriate puncture positions as well as robotic manipulation mechanisms for needle insertion and bending. The system also allows for automatic movement of an ultrasound probe to visualize the needle tip in a needle insertion task in real time.","PeriodicalId":236105,"journal":{"name":"2022 Design of Medical Devices Conference","volume":"117 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123101682","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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