journal
MENU ▼
Read by QxMD icon Read
search

Journal of Biomechanical Engineering

journal
https://www.readbyqxmd.com/read/29222565/biomechanics-and-mechanobiology-of-saphenous-vein-grafts
#1
Keith Gooch, Michael Firstenberg, Brittany Shrefler, Benjamin Scandling
Within several weeks of use as coronary artery bypass grafts (CABG), saphenous veins (SV) exhibit significant intimal hyperplasia (IH). The fact that SV do not develop significant IH in their native venous environment coupled with the rapidity with which they develop IH following grafting into the arterial circulation suggests that factors associated with the isolation and preparation of SV and/or differences between the venous and arterial environments contribute to disease progression. There is strong evidence suggesting that mechanical trauma associated with traditional techniques of SV preparation can significantly damage the vessel and might potentially reduce graft patency though modern surgical techniques reduces these injuries...
December 9, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29222564/primary-blast-brain-injury-mechanisms-current-knowledge-limitations-and-future-directions
#2
Elizabeth Fievisohn, Zachary Bailey, Allison Guettler, Pamela VandeVord
Mild blast traumatic brain injury (bTBI) accounts for the majority of brain injury in United States service members and other military personnel worldwide. The mechanisms of primary blast brain injury continue to be disputed with little evidence to support one or a combination of theories. The main hypotheses addressed in this review are blast wave transmission through the skull orifices, direct cranial transmission, skull flexure dynamics, thoracic surge, acceleration, and cavitation. Each possible mechanism is discussed using available literature with the goal of focusing research efforts to address limitations and challenges that exist in blast injury research...
December 9, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29222536/student-paper-competition-winners-2017
#3
Beth A Winkelstein, Victor H Barocas
n/a.
December 9, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29222534/society-awards-2017
#4
Beth A Winkelstein, Victor H Barocas
n/a.
December 9, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29222533/elastic-fibers-and-large-artery-mechanics
#5
M G Espinosa, Marius C Staiculescu, Jungsil Kim, Eric Marin, Jessica E Wagenseil
Development of a closed circulatory system requires that large arteries adapt to the mechanical demands of high, pulsatile pressure. Elastin and collagen uniquely address these design criteria in the low and high stress regimes, resulting in a nonlinear mechanical response. Elastin is the core component of elastic fibers, which provide the artery wall with energy storage and recoil. The integrity of the elastic fiber network is affected by component insufficiency or disorganization, leading to an array of vascular pathologies and compromised mechanical behavior...
December 9, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29222556/2017-skalak-paper
#6
Beth A Winkelstein, Victor H Barocas
none.
December 7, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29211294/single-cell-analysis-using-hyperspectral-imaging-modalities
#7
Nishir Mehta, Shahensha Shaik, Ram Devireddy, Manas Gartia
Almost a decade ago, Hyperspectral Imaging (HSI) was employed by the NASA in satellite imaging applications such as remote sensing technology. This technology has since been extensively used in the exploration of minerals, agricultural purposes, water resources, and urban development needs. Due to recent advancements in optical re-construction and imaging, HSI can now be appliedtranslated down to micro- and nano-meter scales possibly allowing for exquisite control and analysis of single cell to complex biological systems...
December 6, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29196764/differences-in-trabecular-microarchitecture-and-simplified-boundary-conditions-limit-the-accuracy-of-qct-based-finite-element-models-of-vertebral-failure
#8
Amira I Hussein, Daniel Louzeiro, Ginu U Unnikrishnan, Elise F Morgan
Vertebral fractures are common in the elderly, but efforts to reduce their incidence have been hampered by incomplete understanding of the failure processes that are involved. This study's goal was to elucidate failure processes in the lumbar vertebra and to assess the accuracy of quantitative computed tomography (QCT)-based finite element (FE) simulations of these processes. Following QCT scanning, spine segments (n=27) consisting of L1 with adjacent intervertebral discs and neighboring endplates of T12 and L2 were compressed axially in a stepwise manner...
December 1, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29188291/residual-stress-and-vascular-mechanics
#9
Jay Humphrey
None.
November 29, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29164228/emg-driven-forward-dynamics-simulation-to-estimate-in-vivo-joint-contact-forces-during-normal-smooth-and-bouncy-gait
#10
Swithin Razu, Trent M Guess
This study leveraged data from the "Sixth Grand Challenge Competition to Predict in Vivo Knee Loads" to create a full-body musculoskeletal model that incorporates subject specific geometries of the right leg in order to concurrently predict knee contact forces, ligament forces, muscle forces, and ground contact forces. The objectives of this paper are twofold: First, to describe an electromyography (EMG)-driven modeling methodology to predict knee contact forces, and second to validate model predictions by evaluating the model predictions against known values for a patient with an instrumented total knee replacement (TKR) for three distinctly different gait styles (normal, smooth, and bouncy gait)...
November 21, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29131890/modeling-inspiratory-flow-in-a-porcine-lung-airway
#11
Peshala/P Thibotuwawa Gamage, Fardin Khalili, Md/Khurshidul Azad, Hansen/A Mansy
Inspiratory flow in a multi-generation pig lung airways was numerically studied at a steady inlet flow rate of 3.2×10-4 m3/s corresponding to a Reynolds number of 1150 in the trachea. The model was validated by comparing velocity distributions with previous measurements and simulations in simplified airway geometries. Simulation results provided detailed maps of the axial and secondary flow patterns at different cross sections of the airway tree. The vortex core regions in the airways were visualized using absolute helicity values and suggested the presence of secondary flow vortices where two counter rotating vortices were observed at the main bifurcation and in many other bifurcations...
November 13, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29131889/poisson-contraction-and-fiber-kinematics-in-tissue-insight-from-collagen-network-simulations
#12
Catalin Picu, Sai Deogekar, Mohammad Islam
Connective tissue mechanics is highly non-linear, exhibits a strong Poisson effect and is associated with significant collagen fiber re-arrangement. Although the general features of the stress-strain behavior in tension and compression and under uniaxial, biaxial and shear loading have been discussed extensively, especially from the macroscopic perspective, the Poisson effect and the kinematics of filaments have received less attention. In general, the relationship between the microscopic fiber network mechanics and the macroscopic experimental observations remains poorly defined...
November 13, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29131886/determinant-factors-for-arterial-hemodynamics-in-hypertension-theoretical-insights-from-a-computational-model-based-study
#13
Fuyou Liang, Debao Guan, Jordi Alastruey
Hypertension is a well-documented predictive factor for cardiovascular events. Clinical studies have extensively demonstrated the differential hemodynamic consequences of various anti-hypertensive drugs, but failed to clearly elucidate the underlying mechanisms due to the difficulty in performing a quantitative deterministic analysis based on clinical data that carry confounding information stemming from inter-patient differences and the nonlinearity of cardiovascular hemodynamics. In the present study, a multi-scale model of the cardiovascular system was developed to quantitatively investigate the relationships between hemodynamic variables and cardiovascular properties under hypertensive conditions, aiming to establish a theoretical basis for assisting in the interpretation of clinical observations or optimization of therapy...
November 13, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29131882/time-course-response-of-the-heart-and-circulatory-system-to-active-postural-changes
#14
Jo P Pauls, Llion Roberts, Tom Burgess, John/F Fraser, Shaun/D Gregory, Geoff Tansley
Rotary blood pumps (RBPs) used for mechanical circulatory support of heart failure patients cannot passively change pump flow sufficiently in response to frequent variations in preload induced by active postural changes. A physiological control system that mimics the response of the healthy heart is needed to adjust pump flow according to patient demand. Thus, baseline data is required on how the healthy heart (i.e. heart rate (HR) and cardiac output (CO)) and circulatory system (i.e. systemic vascular resistance (SVR)) respond...
November 13, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29114772/development-of-a-single-degree-of-freedom-mechanical-model-for-predicting-strain-based-brain-injury-responses
#15
Lee F Gabler, Hamed Joodaki, Jeff R Crandall, Matthew B Panzer
Linking head impact kinematics to injury risk has been the focus of numerous brain injury criteria. Although many early forms were developed using mechanics principles, recent criteria have been developed using empirical methods based on subsets of head impact data. In this study, a single-degree-of-freedom (sDOF) mechanical analogue was developed to study the link between rotational head kinematics and brain deformation. Model efficacy was assessed by comparing its dynamic response to strain-based brain injury predictors from finite element (FE) human head models...
November 6, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29114765/operator-bias-errors-are-reduced-using-standing-marker-alignment-device-for-repeated-visit-studies
#16
Laura Hutchinson, Joel B Schwartz, Amy M Morton, Irene S Davis, Kevin Deluzio, Michael J Rainbow
When optical motion capture is used for motion analysis, reflective markers or a digitizer are typically used to record the location of anatomical landmarks identified through palpation. The landmarks are then used to construct anatomical coordinate systems. Failure to consistently identify landmarks through palpation over repeat tests creates artifacts in the kinematic waveforms. The purpose of this work was to improve intra- and inter-rater reliability in determining anatomical landmarks and the associated anatomical coordinate systems using a Marker Alignment Device...
November 6, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29101403/evaluation-of-the-effect-of-bariatric-surgery-induced-weight-loss-on-knee-gait-and-cartilage-degeneration
#17
Mimmi K Liukkonen, Mika E Mononen, Paavo Vartiainen, Päivi Kaukinen, Timo Bragge, Juha-Sampo Suomalainen, Markus K H Malo, Sari Venesmaa, Pirjo Käkelä, Jussi Pihlajamäki, Pasi A Karjalainen, Jari P Arokoski, Rami Korhonen
The objective of the study was to investigate the effect of bariatric surgery-induced weight loss on knee gait and cartilage degeneration in osteoarthritis by combining magnetic resonance imaging, gait analysis, finite element modeling and cartilage degeneration algorithm. Gait analyses were performed for obese subjects before and one-year after the bariatric surgery. Finite element models were created before and after weight loss for those subjects who had not severe tibio-femoral knee cartilage loss. Knee cartilage degenerations were predicted using an adaptive cartilage degeneration algorithm which is based on cumulative overloading of cartilage, leading to iteratively altered cartilage properties during osteoarthritis...
November 3, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29098290/fluid-structure-interaction-models-of-bicuspid-aortic-valves-the-effects-of-non-fused-cusp-angles
#18
Karin Lavon, Rotem Halevi, Gil Marom, Sagit Ben Zekry, Ashraf Hamdan, Hans Joachim Schäfers, Ehud Raanani, Rami Haj-Ali
Bicuspid aortic valve (BAV) is the most common type of congenital heart disease, occurring in 0.5-2% of the population, where the valve has only two rather than the three normal cusps. Valvular pathologies, such as aortic regurgitation and aortic stenosis, are associated with BAVs, thereby increasing the need for a better understanding of BAV kinematics and geometrical characteristics. The aim of this study is to investigate the influence of the non-fused cusp (NFC) angle in BAV type-1 configuration on the valve's structural and hemodynamic performance...
November 2, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29080304/high-resolution-computational-fluid-dynamic-simulation-of-haemodialysis-cannulation-in-a-patient-specific-arteriovenous-fistula
#19
David Fulker, Bogdan Ene-Iordache, Tracie J Barber
Arteriovenous fistulae are the preferred choice of vascular access in hemodialysis patients, however complications such as stenosis can lead to access failure or recirculation, which reduces dialysis efficiency. This study utilized computational fluid dynamics on a patient specific radio-cephalic fistula under hemodialysis treatment to determine the dynamics of access recirculation and identify the presence of disturbed flow. Metrics of transverse wall shear stress and oscillatory shear index were used to characterize the disturbed flow acting on the blood vessel wall, whilst a power spectral density analysis was used to calculate the any turbulence within the access...
October 28, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29080303/is-the-mechanical-fatigue-of-bone-influenced-more-by-the-impact-or-active-phase-of-running
#20
Lindsay L Loundagin, Tannin Schmidt, W Brent Edwards
Stress fractures are common overuse injuries amongst runners associated with the mechanical fatigue of bone. Several in vivo biomechanical studies have investigated specific characteristics of the vertical ground reaction force (vGRF) in running and have observed an association between increased loading rate during impact and individuals with a history of stress fracture. The purpose of this study was to examine the fatigue behavior of cortical bone using vGRF-like loading profiles, including those that had been decomposed into their respective impact and active phase components...
October 28, 2017: Journal of Biomechanical Engineering
journal
journal
27769
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"