Open Access. Powered by Scholars. Published by Universities.®

Biomedical Engineering and Bioengineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 20 of 20

Full-Text Articles in Biomedical Engineering and Bioengineering

کارگاه اصول نگارش مقالات علمی 1, Dr Alireza Zolfaghari Dec 2013

کارگاه اصول نگارش مقالات علمی 1, Dr Alireza Zolfaghari

Dr Alireza Zolfaghari

No abstract provided.


Comment On "Quadriceps Protects The Anterior Cruciate Ligament", Antonie J. Van Den Bogert Dec 2013

Comment On "Quadriceps Protects The Anterior Cruciate Ligament", Antonie J. Van Den Bogert

Antonie J. van den Bogert

No abstract provided.


Personal Navigation Via High-Resolution Gait-Corrected Inertial Measurement Units, Özkan Bebek, Michael A. Suster, Srihari Rajgopal, Michael J. Fu, Xuemei Huang, M. Cenk Çavu¸So˘Glu,, Darrin J. Young, Mehran Mehregany, Antonie J. Van Den Bogert, Carlos H. Mastrangelo Dec 2013

Personal Navigation Via High-Resolution Gait-Corrected Inertial Measurement Units, Özkan Bebek, Michael A. Suster, Srihari Rajgopal, Michael J. Fu, Xuemei Huang, M. Cenk Çavu¸So˘Glu,, Darrin J. Young, Mehran Mehregany, Antonie J. Van Den Bogert, Carlos H. Mastrangelo

Antonie J. van den Bogert

In this paper, a personal micronavigation system that uses high-resolution gait-corrected inertial measurement units is presented. The goal of this paper is to develop a navigation system that uses secondary inertial variables, such as velocity, to enable long-term precise navigation in the absence of Global Positioning System (GPS) and beacon signals. In this scheme, measured zerovelocity duration from the ground reaction sensors is used to reset the accumulated integration errors from accelerometers and gyroscopes in position calculation. With the described system, an average position error of 4 m is achieved at the end of half-hour walks.


An Analytical Model For Rotator Cuff Repairs, A. Aurora, Jorge E. Gatica, Antonie J. Van Den Bogert, J. A. Mccarron, Kathleen A. Derwin Dec 2013

An Analytical Model For Rotator Cuff Repairs, A. Aurora, Jorge E. Gatica, Antonie J. Van Den Bogert, J. A. Mccarron, Kathleen A. Derwin

Antonie J. van den Bogert

Background

Currently, natural and synthetic scaffolds are being explored as augmentation devices for rotator cuff repair. When used in this manner, these devices are believed to offer some degree of load sharing; however, no studies have quantified this effect. Furthermore, the manner in which loads on an augmented rotator cuff repair are distributed among the various components of the repair is not known, nor is the relative biomechanical importance of each component. The objectives of this study are to (1) develop quasi-static analytical models of simplified rotator cuff repairs, (2) validate the models, and (3) predict the degree of load ...


A Real-Time, 3-D Musculoskeletal Model For Dynamic Simulation Of Arm Movements, Edward K. Chadwick, Dimitra Blana, Antonie J. Van Den Bogert, Robert F. Kirsch Dec 2013

A Real-Time, 3-D Musculoskeletal Model For Dynamic Simulation Of Arm Movements, Edward K. Chadwick, Dimitra Blana, Antonie J. Van Den Bogert, Robert F. Kirsch

Antonie J. van den Bogert

Neuroprostheses can be used to restore movement of the upper limb in individuals with high-level spinal cord injury. Development and evaluation of command and control schemes for such devices typically require real-time, ldquopatient-in-the-looprdquo experimentation. A real-time, 3-D, musculoskeletal model of the upper limb has been developed for use in a simulation environment to allow such testing to be carried out noninvasively. The model provides real-time feedback of human arm dynamics that can be displayed to the user in a virtual reality environment. The model has a 3-DOF glenohumeral joint as well as elbow flexion/extension and pronation/supination and contains ...


Sequential Structural And Fluid Dynamics Analysis Of Balloon-Expandable Coronary Stents., David Martin Oct 2013

Sequential Structural And Fluid Dynamics Analysis Of Balloon-Expandable Coronary Stents., David Martin

Doctoral

As in-stent restenosis following coronary stent deployment has been strongly linked with stent-induced arterial injury and altered vessel hemodynamics, the sequential numerical analysis of the mechanical and hemodynamic impact of stent deployment within a coronary artery is likely to provide an excellent indication of coronary stent performance. Despite this observation, very few numerical studies have considered both the mechanical and hemodynamic impact of stent deployment. In light of this observation, the aim of this research is to develop a robust numerical methodology for investigating the performance of balloon-expandable coronary stents in terms of their mechanical and hemodynamic impact within a ...


Numerical Investigation Of The Interdependence Between Humeral Implant Position And Bone Removal Amount For Total Elbow Arthroplasty, Alexander J. Heroux Aug 2013

Numerical Investigation Of The Interdependence Between Humeral Implant Position And Bone Removal Amount For Total Elbow Arthroplasty, Alexander J. Heroux

Electronic Thesis and Dissertation Repository

Total elbow arthroplasty is a surgical procedure used to replace an afflicted articulation with prosthetic joint components. A good alignment between the native and prosthetic flexion-extension axes of the elbow is required to preserve its functionality. However, this is often unobtainable because of the mismatch between humeral canal and implant stem geometries. To correct this, surgeons are often required to intraoperatively make error-prone decisions when determining an appropriate implant posture that minimizes the amount of cortical bone to be removed while maintaining the alignment between the two flexion-extension axes. To address this issue, the present study has developed computational tools ...


Design Of A Minimally Invasive Single Port Hdr Brachytherapy Applicator For The Treatment Of Lung Cancer, Mauricio Nahum Leroy Aug 2013

Design Of A Minimally Invasive Single Port Hdr Brachytherapy Applicator For The Treatment Of Lung Cancer, Mauricio Nahum Leroy

Electronic Thesis and Dissertation Repository

Cancer has become the number one cause of death in Canada and lung cancer is its deadliest form. Surgical resection remains as the treatment of choice for most patients; however, in many cases a less aggressive alternative such as brachytherapy may be preferable. Today, HDR brachytherapy is a relatively common procedure but with current techniques and equipment only tumours close to the main bronchi can be reached.

This project describes the design, development and validation of a first prototype of an ultrasound-guided needle guidance system that would enable physicians to perform HDR brachytherapy for the treatment of lung cancer in ...


Finite Element Models Of The Knee & Hip Joints: Using Opensim To Predict Muscle Forces, Kevin S. Jones, Spencer D. Wangerin, Jeffrey D. Pyle, Stephen M. Klisch, Scott J. Hazelwood Aug 2013

Finite Element Models Of The Knee & Hip Joints: Using Opensim To Predict Muscle Forces, Kevin S. Jones, Spencer D. Wangerin, Jeffrey D. Pyle, Stephen M. Klisch, Scott J. Hazelwood

STAR (STEM Teacher and Researcher) Presentations

Quantitative data of stresses and strains in the cartilage of the knee and hip joints are required to design prostheses and can be used to give accurate advice to patients with cartilage damage as to which activities should be avoided. Instrumented hip implants can only give the overall resultant force in the joint, not the stresses and strains throughout the cartilage. Finite Element (FE) models of the Knee and Hip are being constructed in order to obtain the stresses and strains in articular (of the joint) cartilage. Muscle forces and joint contact forces are required as inputs to these FE ...


Guidance System, Kayaking For The Visually Impaired, D. Ryan Kirtland, Ryan Phife, William Gardner, Amy Johnson Jun 2013

Guidance System, Kayaking For The Visually Impaired, D. Ryan Kirtland, Ryan Phife, William Gardner, Amy Johnson

Biomedical Engineering

Quality Life Plus is working with Team River Runner to develop an assistive guidance system for veterans who want to remain active by kayaking, after sustaining an injury that impairs vision. This system allows these veterans to complete a slalom speed race independent of a personal guide in the water. The system incorporates 3 stations that each contain a speaker connected to a microcontroller system covered by a Pelican Case on a custom made buoy. During the slalom race, a kayaker will travel from shore towards buoy #1 as it omits sound from the speaker. As the kayaker moves around ...


Design And Development Of A Stair Ascension Assistive Device For Transfemoral Amputees, Casey Michael Barbarino Jun 2013

Design And Development Of A Stair Ascension Assistive Device For Transfemoral Amputees, Casey Michael Barbarino

Master's Theses and Project Reports

Transfemoral amputees around the world experience increased difficulty in climbing stairs due to lack of muscle, balance, and other factors. The loss of a lower limb greatly diminishes the amount of natural force generation provided that is necessary to propel oneself up stairs. This study investigated possible solutions to the problem of stair ascension for transfemoral amputees by the means of designing and developing an externally attachable device to a prosthesis. The number of amputations from military service has greatly increased since 2008, which shows there is a clear need for assistive devices (Wenke, Krueger, & Ficke, 2012). With the number ...


Design Of A Pool Access Device, Linjun Bu, Patrick Graham May 2013

Design Of A Pool Access Device, Linjun Bu, Patrick Graham

Assistive Technology Resource Center Projects

A pool chair was designed using the 2010 ADA standards for accessible design. The design uses a parallel four-bar linkage mechanism and is able to lift the chair with an average weight person in and out of the pool. The motion of the design has been analyzed. The motion is achieved by an electronic linear actuator. The analysis of the motion of this design yields reasonable transmission angles of 73° to 110°.


Design And Testing Of Novel Mouthguard With Intermediate Nitinol And Foam Layers, Adam Kessler May 2013

Design And Testing Of Novel Mouthguard With Intermediate Nitinol And Foam Layers, Adam Kessler

UNLV Theses, Dissertations, Professional Papers, and Capstones

It is the aim of this study to investigate a novel mouthguard design that incorporates the use of a nickel-titanium (Nitinol) layer and thin foam layer in addition to EVA layers. It is thought that the Nitinol layer can distribute the force of an impact and that the thin foam layer may absorb this distributed force better than a solid EVA mouthguard of the same thickness. Rectangular, flat coupons representative of several mouthguard configurations were constructed for testing using an instrumented drop-weight impact tower. The coupon configurations include a control made of laminated EVA, a group of laminated EVA and ...


Closed Loop Control Of A Cylindrical Tube Type Ionic Polymer Metal Composite (Ipmc), Benjamin Mead May 2013

Closed Loop Control Of A Cylindrical Tube Type Ionic Polymer Metal Composite (Ipmc), Benjamin Mead

UNLV Theses, Dissertations, Professional Papers, and Capstones

The goal of this research is to provide a framework for the integration of tube type, cylindrical Ionic Polymer Metal-Composite (IPMC) into conventional devices. IPMCs are one of the most widely used types of electro-active polymer actuator, due to their low electric driving potential and large deformation range. For this research a tube type IPMC was investigated. This IPMC has a circular cross section with four separate electrodes on its surface and a hole through the middle. The four electrodes allow for biaxial bending and accurate control of the tip location. One of the main advantages of using this type ...


Design Of A Powered Hand Orthosis, Elyssa Dorenfeld, Robert Wolf, Stephan Zeveska Apr 2013

Design Of A Powered Hand Orthosis, Elyssa Dorenfeld, Robert Wolf, Stephan Zeveska

Assistive Technology Resource Center Projects

The goal of this project was to design and manufacture a fully functional powered hand orthosis, controlled and operated by the contralateral hand, and used by people with diminished hand functions. Linear actuators were used to create the movement of the fingers through a six-bar linkage. The design reduces the twenty seven degrees of freedom in a healthy human hand to six and replicates the motions needed to perform the most common grips including the cylindrical, pinch, and key grips. Results showed that a single finger could exert a force of 50N. This correlates to an approximate hand strength of ...


Motorsports Safety, Anthony Begins, Korapat Lamsam, Kerrie Maron Apr 2013

Motorsports Safety, Anthony Begins, Korapat Lamsam, Kerrie Maron

Assistive Technology Resource Center Projects

The prevalence of neck injuries and basilar skull fractures in motorsports caused many sanctioning bodies in top-tier auto-racing divisions to mandate the use of head and neck restraints. Current devices inhibit drivers from exiting the car in emergencies, such as a fire or situation where emergency medical personnel are needed. The Motorsports Safety group designed and prototyped a new head and neck restraint device that can be removed easily while wearing a racing helmet by releasing a wing via a quick release mechanism. Evaluation of the prototype demonstrated that the time to remove the device via the quick release was ...


Shoulder Mount For A Wearable Arm Orthosis, Richard Downey, Nikole Dunn, Adam Hoyt Apr 2013

Shoulder Mount For A Wearable Arm Orthosis, Richard Downey, Nikole Dunn, Adam Hoyt

Assistive Technology Resource Center Projects

Functionality of the upper limb is vital for performing Activities of Daily Living (ADLs) such as bathing, dressing, and eating. The goal of this project was to design, manufacture, test, and evaluate a shoulder mount to be used in conjunction with a powered, upper-limb orthosis. A prototype was developed that allows completion of all necessary ADLs, is user-friendly, and does not significantly increase the user’s body frame. On average, the device limits the user’s shoulder flexion and abduction by approximately 43% and 50%, respectively, and is reasonably adjustable to both male and female users in the 25th to ...


An Investigation Of Subaxial Cervical Spine Trauma And Surgical Treatment Through Biomechanical Simulation And Kinematic Analysis, Stewart D. Mclachlin Apr 2013

An Investigation Of Subaxial Cervical Spine Trauma And Surgical Treatment Through Biomechanical Simulation And Kinematic Analysis, Stewart D. Mclachlin

Electronic Thesis and Dissertation Repository

In vitro biomechanical investigations can help to identify changes in subaxial cervical spine (C3-C7) stability following injury, and determine the efficacy of surgical treatments through controlled joint simulation experiments and kinematic analyses. However, with the large spectrum of cervical spine trauma, a large fraction of the potential injuries have not been examined biomechanically. This includes a lack of studies investigating prevalent flexion-distraction injuries. Therefore, the overall objective of this thesis was to investigate the changes in subaxial cervical spine kinematic stability with simulated flexion-distraction injuries and current surgical instrumentation approaches using both established and novel biomechanical techniques.

Three in vitro ...


Design, Development, And Verification Of An Automated Pain Measurement Device, Morgan L. Hill Jan 2013

Design, Development, And Verification Of An Automated Pain Measurement Device, Morgan L. Hill

Mechanical Engineering Graduate Theses & Dissertations

The focus of this study is the redesign, development, fabrication, and initial evaluation of an automated pain measurement device. The redesign will focus on improving the original Computer Controlled Pressure Algometer, designed by Zimkowski in 2010. Pain measurement is very difficult to accurately accomplish, and current methods are limited to subjective techniques such as pain rating scales and handheld algometry. These subjective methods of pain measurement have many shortcomings that render them inadequate at reliably assessing an individual's pain. Large variability has been shown with these testing methods, which can be prone to error due to test administrator, environmental ...


Distal Placement Of An End-To-Side Bypass Graft Anastomosis: A 3d Computational Study, John Di Cicco, Ayodeji Demuren Jan 2013

Distal Placement Of An End-To-Side Bypass Graft Anastomosis: A 3d Computational Study, John Di Cicco, Ayodeji Demuren

Mechanical & Aerospace Engineering Faculty Publications

A three-dimensional (3D) computational fluid dynamics study of shear rates around distal end-to-side anastomoses has been conducted. Three 51% and three 75% cross-sectional area-reduced 6 mm cylinders were modeled each with a bypass cylinder attached at a 30-degree angle at different placements distal to the constriction. Steady, incompressible, Newtonian blood flow was assumed, and the full Reynolds-averaged Navier-Stokes equations, turbulent kinetic energy, and specific dissipation rate equations were solved on a locally structured multiblock mesh with hexahedral elements. Consequently, distal placement of an end-to-side bypass graft anastomosis was found to have an influence on the shear rate magnitudes. For the ...