journal
https://read.qxmd.com/read/33995757/clinical-translation-of-an-insertion-tool-for-minimally-invasive-cochlear-implant-surgery
#21
JOURNAL ARTICLE
Katherine E Riojas, Emily T Tran, Michael H Freeman, Jack H Noble, Robert J Webster, Robert F Labadie
The objective of this paper is to describe the development of a minimally invasive cochlear implant surgery (MICIS) electrode array insertion tool concept to enable clinical translation. First, analysis of the geometric parameters of potential MICIS patients (N = 97) was performed to inform tool design, inform MICIS phantom model design, and provide further insight into MICIS candidacy. Design changes were made to the insertion tool based on clinical requirements and parameter analysis results. A MICIS phantom testing model was built to evaluate insertion force profiles in a clinically realistic manner, and the new tool design was evaluated in the model and in cadavers to test clinical viability...
September 1, 2021: Journal of Medical Devices
https://read.qxmd.com/read/33995756/generic-implant-positioning-technology-based-on-hole-projections-in-x-ray-images
#22
JOURNAL ARTICLE
Markus Windolf, Robert Geoff Richards
Implant placement plays a key role in trauma and orthopedics. In this paper, a generic technological concept for implant positioning assistance is outlined. The system utilizes conventional radiographic devices for imaging and tracking and embeds into surgical workflows without the need for complex navigation equipment. It is based on feature extraction from cylindrical hole-projections in X-ray images for determining spatial alignment of implant and anatomy. Basic performance of a prototype system was experimentally verified in terms of tracking accuracy and robustness under varying conditions...
June 1, 2021: Journal of Medical Devices
https://read.qxmd.com/read/33613807/device-prototype-for-vaginal-delivery-of-extremely-preterm-fetuses-in-the-breech-presentation
#23
JOURNAL ARTICLE
Mallory Whalen, Elizabeth Chang-Davidson, Terra Moran, Rachel Hoffman, Galit H Frydman, Alexander Slocum, Alissa Dangel
Vaginal delivery is typically avoided in the extremely preterm breech population due to the concern of entrapment by the cervix of the aftercoming head. A mechanical device concept is presented to enable vaginal delivery by preventing retraction of the cervix against the fetus during delivery. The two-part device was designed to dilate the cervix, prevent prolapse of small fetal parts and maintain sufficient dilation during delivery. The two-part device was designed and manufactured with the following modules: an inflatable saline-filled cervical balloon for dilation and a cervical retractor composed of semirigid beams to stabilize the cervix and maintain adequate dilation...
June 1, 2021: Journal of Medical Devices
https://read.qxmd.com/read/33442440/design-and-validation-of-a-low-cost-bodyweight-support-system-for-overground-walking
#24
JOURNAL ARTICLE
Mhairi K MacLean, Daniel P Ferris
Walking with bodyweight support is a vital tool for both gait rehabilitation and biomechanics research. There are few commercially available bodyweight support systems for overground walking that are able to provide a near constant lifting force of more than 50% bodyweight. The devices that do exist are expensive and are not often used outside of rehabilitation clinics. Our aim was to design, build, and validate a bodyweight support device for overground walking that: (1) cost less than $5000, (2) could support up to 75% of the users' bodyweight (BW), and (3) had small (±5% BW) fluctuations in force...
December 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32983315/model-based-design-and-optimization-of-blood-oxygenators
#25
JOURNAL ARTICLE
Ge He, Tao Zhang, Jiafeng Zhang, Bartley P Griffith, Zhongjun J Wu
Blood oxygenators, also known as artificial lungs, are widely used in cardiopulmonary bypass surgery to maintain physiologic oxygen (O2 ) and carbon dioxide (CO2 ) levels in blood, and also serve as respiratory assist devices to support patients with lung failure. The time- and cost-consuming method of trial and error is initially used to optimize the oxygenator design, and this method is followed by the introduction of the computational fluid dynamics (CFD) that is employed to reduce the number of prototypes that must be built as the design is optimized...
December 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32983314/conceptual-framework-development-for-a-double-walled-aortic-stent-graft-to-manage-blood-pressure
#26
JOURNAL ARTICLE
Shannen B Kizilski, Omid Amili, Filippo Coletti, Rumi Faizer, Victor H Barocas
A double-walled stent-graft (DWSG) design with a compressible gas layer was conceived with the goal of treating hypertension in patients receiving an aortic stent-graft. Early prototypes were developed to evaluate the design concept through static measurements from a finite element (FE) model and quasi-static inflation experiments, and through dynamic measurements from an in vitro flow loop and the three-element Windkessel model. The amount of gas in the gas layer and the properties of the flexible inner wall were the primary variables evaluated in this study...
September 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32431763/ex-vivo-and-in-vivo-imaging-study-of-ultrasound-capsule-endoscopy
#27
JOURNAL ARTICLE
John H Lee, Giovanni Traverso, David Ibarra-Zarate, Duane S Boning, Brian W Anthony
Wireless capsule endoscopy (WCE) has revolutionized the capacity for evaluation of the gastrointestinal (GI) tract, but its evaluation is limited to the mucosal surface. To overcome this, ultrasound capsule endoscopy (UCE) that can evaluate the deeper structures beyond the mucosal surface has been proposed and several studies focusing on technology development have demonstrated promising results. However, investigations of the potential for clinical utility of this technology are lacking. This work had two main goals: perform ex vivo and in vivo imaging studies in a swine model to (1) evaluate if acoustic coupling between a capsule with a specific size and GI tract can be achieved only through peristalsis autonomously without any human control and (2) identify key issues and challenges to help guide further research...
June 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32280409/design-and-development-of-a-quasi-passive-transtibial-biarticular-prosthesis-to-replicate-gastrocnemius-function-in-walking
#28
JOURNAL ARTICLE
Andrea M Willson, Chris A Richburg, Joseph Czerniecki, Katherine M Steele, Patrick M Aubin
Lower-limb amputees experience many gait impairments and limitations. Some of these impairments can be attributed to the lack of a functioning biarticular gastrocnemius (GAS) muscle. We propose a transtibial prosthesis that implements a quasi-passive spring mechanism to replicate GAS function. A prototype biarticular prosthesis (BP) was designed, built, and tested on one subject with a transtibial amputation. They walked on an instrumented treadmill with motion capture under three different biarticular spring stiffness conditions...
June 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32328213/diagnostics-as-the-key-to-advances-in-global-health-proposed-methods-for-making-reliable-diagnostics-widely-available
#29
JOURNAL ARTICLE
David Melander, Sudesh Sivarasu, Ibrahim Yekinni, Cheng Yunzhang, Arthur Erdman
This paper proposes a structure and method for the development of an AI diagnostic system as a highly leveraged step toward improvements in delivery of healthcare in underserved regions. First, the paper provides a high-level, general review of the current efforts to provide healthcare services in underserved areas and the many efforts being made to impact health outcomes by various international, governmental, and NGO entities. We also very briefly review university programs and research institutions that have specific technical and institutional assets with significant potential to carry out research or to partially implement such a plan...
March 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32328212/the-effect-of-chemical-cleaning-on-mechanical-properties-of-three-dimensional-printed-polylactic-acid
#30
JOURNAL ARTICLE
Julie C Fleischer, Jan C Diehl, Linda S G L Wauben, Jenny Dankelman
Three-dimensional (3D) printing may be a solution to shortages of equipment and spare parts in the healthcare sector of low- and middle-income countries (LMICs). Polylactic acid (PLA) for 3D printing is widely available and biocompatible, but there is a gap in knowledge concerning its compatibility with chemical disinfectants. In this study, 3D-printed PLA tensile samples were created with six different printer settings. Each of these six batches consisted of five sets with five or six samples. The first set remained untreated, the others were soaked in Cidex OPA or in a chlorine solution...
March 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32328211/internet-of-things-enabled-dual-channel-iontophoretic-drug-delivery-system-for-elderly-patient-medication-management
#31
JOURNAL ARTICLE
Mynampati Akshitha Reddy, Bikash Kumar Pradhan, Dilshad Qureshi, Sumit Kumar Pal, Kunal Pal
Wireless controllers have found its application in the supervision of the patients in the hospitals. It is not only a valid issue for the developing countries but also for the developed countries. For this reason, scientists are working on the advancement of medical devices that are capable of decreasing the workload of health caregivers. In this study, the development of an iontophoretic drug delivery device that could be controlled using a mobile is described. For the purpose, hardware and a software module were developed...
March 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32328210/medical-devices-for-low-and-middle-income-countries-a-review-and-directions-for-development
#32
REVIEW
Aditya Vasan, James Friend
The development of diagnostics and medical devices has historically been concentrated in high-income countries, despite a significant need to expand healthcare services to low- and middle-income countries (LMIC). Poor quality healthcare extends beyond LMIC to underserved communities in developed countries. This paper reviews diseases and conditions that have not received much attention in the past despite imposing a significant burden on healthcare systems in these circumstances. We review the underlying mechanism of action of these conditions and current technology in use for diagnosis or surgical intervention...
March 1, 2020: Journal of Medical Devices
https://read.qxmd.com/read/32280408/soft-tissue-anchoring-performance-biomechanical-properties-and-tissue-reaction-of-a-new-hernia-mesh-engineered-to-address-hernia-occurrence-and-recurrence
#33
JOURNAL ARTICLE
Mohamad M Ibrahim, Jason L Green, Jeffrey Everitt, David Ruppert, Richard Glisson, Frank Leopardi, Thomas Risoli, Maragatha Kuchibhatla, Randall Reynolds, Howard Levinson
One opportunity to reduce hernia occurrence and recurrence rates (currently estimated to be 30% at 10 years postoperatively) is by enhancing the ability of hernia meshes to anchor into tissue to prevent mesh migration, mesh contraction, and mesh tearing away from tissue. To address this, we developed a novel moderate-weight, macroporous, polypropylene mesh (termed the T-line mesh) with mesh extensions to optimize anchoring. We examined the physical properties, biomechanical performance, and biocompatibility of this novel mesh versus a predicate mesh anchored with #0-suture...
December 1, 2019: Journal of Medical Devices
https://read.qxmd.com/read/32280407/a-new-noninvasive-accelerometric-method-for-diagnosing-acid-andnon-acid-gastroesophageal-reflux-in-premature-infants-proof-of-concept
#34
JOURNAL ARTICLE
Ira H Gewolb, Frank L Vice
Non-acid reflux is common in premature neonates. Current methods of diagnosing gastroesophageal reflux (GER) such as pH probes, multichannel impedance monitoring, X-rays, or endoscopy are either invasive or unable to diagnose non-acid reflux. Passage of a naso-esophageal tube is uncomfortable. Imaging studies are of short duration and may miss reflux entirely. Herein, we present proof of concept of a noninvasive accelerometric device that detects acid and non-acid reflux in premature infants. An accelerometer was taped over the subxiphoid process in patients suspected of having GER who were already scheduled for pH probe or multichannel impedance monitoring...
December 1, 2019: Journal of Medical Devices
https://read.qxmd.com/read/31700564/are-medical-grade-bioabsorbable-polymers-a-viable-material-for-fused-filament-fabrication
#35
JOURNAL ARTICLE
Jaclyn Schachtner, Michael Frohbergh, Noreen Hickok, Steven Kurtz
Lumbar fusion surgery has grown in popularity as a solution to lower back pain. Surgical site infection (SSI) is a serious complication of spinal surgery, affecting as high as 8.5% of the patient population. If the SSI cannot be eradicated with intravenous antibiotics, the next step is second surgery, which increases the cost imposed on the patient and extends recovery time. An implantable ultrasound-triggered polyether ether ketone device for the dispersal of antibiotics has been developed as a potential solution...
September 2019: Journal of Medical Devices
https://read.qxmd.com/read/31379985/an-extensible-orthopaedic-wire-navigation-simulation-platform
#36
JOURNAL ARTICLE
Steven Long, Geb W Thomas, Donald D Anderson
The demand for simulation-based skills training in orthopaedics is steadily growing. Wire navigation, or the ability to use 2D images to place an implant through a specified path in bone, is an area of training that has been difficult to simulate given its reliance on radiation based fluoroscopy. Our group previously presented on the development of a wire navigation simulator for a hip fracture module. In this paper, we present a new methodology for extending the simulator to other surgical applications of wire navigation...
September 2019: Journal of Medical Devices
https://read.qxmd.com/read/31156736/coating-techniques-and-release-kinetics-of-drug-eluting-stents
#37
JOURNAL ARTICLE
Megan Livingston, Aaron Tan
Implantation of drug-eluting stents (DESs) via percutaneous coronary intervention is the most popular treatment option to restore blood flow to occluded vasculature. The many devices currently used in clinic and under examination in research laboratories are manufactured using a variety of coating techniques to create the incorporated drug release platforms. These coating techniques offer various benefits including ease of use, expense of equipment, and design variability. This review paper discusses recent novel DES designs utilizing individual or a combination of these coating techniques and their resulting drug release profiles...
May 4, 2019: Journal of Medical Devices
https://read.qxmd.com/read/34113417/a-robust-incubator-to-improve-access-to-microbiological-culture-in-low-resource-environments
#38
JOURNAL ARTICLE
Andrew K Miller, Simon Ghionea, Manivanh Vongsouvath, Viengmon Davong, Mayfong Mayxay, Akos Somoskovi, Paul N Newton, David Bell, Michael Friend
To help address the limitations of operating conventional microbiological culture incubators in low resource environments, a new incubator design was developed and tested to meet the requirements of operation in laboratories without reliable power (power outages up to 12 contiguous hours) or climate control (ambient indoor temperatures from 5 °C to 45 °C). The device is designed to enable adherence to incubation temperatures recommended for growth detection, identification, and drug susceptibility testing (DST) of human pathogenic bacteria...
March 2019: Journal of Medical Devices
https://read.qxmd.com/read/30662581/a-hand-held-device-to-apply-instrument-assisted-soft-tissue-mobilization-at-targeted-compression-forces-and-stroke-frequencies
#39
JOURNAL ARTICLE
John B Everingham, Peter T Martin, Trevor J Lujan
Instrument-assisted soft tissue mobilization (IASTM) is a manual therapy technique that is commonly used to treat dysfunctions in ligaments and other musculoskeletal tissues. The objective of this study was to develop a simple hand-held device that helps users accurately apply targeted compressive forces and stroke frequencies during IASTM treatments. This portable device uses a force sensor, tablet computer, and custom software to guide the application of user-specified loading parameters. To measure performance, the device was used to apply a combination of targeted forces and stroke frequencies to foam blocks and silicone pads...
March 2019: Journal of Medical Devices
https://read.qxmd.com/read/30662580/advances-in-diagnostic-methods-for-zika-virus-infection
#40
REVIEW
Carlos A Herrada, Md Alamgir Kabir, Rommel Altamirano, Waseem Asghar
The Zika virus (ZIKV) is one of the most infamous mosquito-borne flavivirus on recent memory due to its potential association with high mortality rates in fetuses, microcephaly and neurological impairments in neonates, and autoimmune disorders. The severity of the disease, as well as its fast spread over several continents, has urged the World Health Organization (WHO) to declare ZIKV a global health concern. In consequence, over the past couple of years, there has been a significant effort for the development of ZIKV diagnostic methods, vaccine development, and prevention strategies...
December 2018: Journal of Medical Devices
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