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https://www.readbyqxmd.com/read/28214616/exploring-factors-influencing-low-back-pain-in-people-with-non-dysvascular-lower-limb-amputation-a-national-survey
#1
Hemakumar Devan, Paul Hendrick, Leigh Hale, Allan Carman, Michael P Dillon, Daniel Cury Ribeiro
BACKGROUND: Chronic low back pain (LBP) is a common musculoskeletal impairment in people with lower limb amputation. Given the multifactorial nature of LBP, exploring the factors influencing the presence and intensity of LBP is warranted. OBJECTIVE: To investigate which physical, personal, and amputee-specific factors predicted presence and intensity of low back pain (LBP) in persons with non-dysvascular transfemoral (TFA) and transtibial amputation (TTA). DESIGN: A retrospective cross-sectional survey SETTING: A national random sample of people with non-dysvascular TFA and TTA...
February 15, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28211058/a-feasibility-study-of-a-hybrid-breast-immobilization-system-for-early-breast-cancer-in-proton-beam-therapy
#2
Takeshi Arimura, Takashi Ogino, Takashi Yoshiura, Mitsugi Matsuyama, Naoaki Kondo, Hideki Miyazaki, Akari Sakuragi, Takayuki Ohara, Etsuyo Ogo, Yoshio Hishikawa
PURPOSE: We aimed to develop a new breast-immobilizing system for proton beam therapy (PBT) of early breast cancer (EBC) that would provide the optimum breast shape during the treatment as well as increased fixation reliability by reducing the influence of respiratory movement. METHODS: The breast-immobilizing system (HyBIS; Hybrid Breast-Immobilizing System) consists of a whole body immobilization system (WBIS), position converting device (to change patient position), photo scanning system, breast cup (made using a three-dimensional printer), breast cup fitting apparatus, breast cup holding device (to ensure the breast remains lifted in the supine position), and dedicated stretcher fixed to the WBIS (to carry the patient)...
February 16, 2017: Medical Physics
https://www.readbyqxmd.com/read/28209380/space-maintaining-management-in-maxillary-sinus-lifting-a-novel-technique-using-a-resorbable-polymeric-thermo-reversible-gel
#3
G Cossellu, G Farronato, D Farronato, G Ceschel, F Angiero
Several techniques have been proposed to achieve sinus floor elevation and the formation of new bone through the grafting of autologous, heterologous, or alloplastic materials. The grafted materials act as a scaffold for bone formation inside the maxillary sinus. This study investigated a non-graft sinus lifting procedure using a resorbable polymeric thermo-reversible gel. A space-maintaining approach to sinus lifting, using a resorbable polymeric thermo-reversible gel, was applied in 11 patients undergoing implant treatment in the atrophic posterior maxilla...
February 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28196148/from-the-track-to-the-ocean-using-flow-control-to-improve-marine-bio-logging-tags-for-cetaceans
#4
Giovani Fiore, Erik Anderson, C Spencer Garborg, Mark Murray, Mark Johnson, Michael J Moore, Laurens Howle, K Alex Shorter
Bio-logging tags are an important tool for the study of cetaceans, but superficial tags inevitably increase hydrodynamic loading. Substantial forces can be generated by tags on fast-swimming animals, potentially affecting behavior and energetics or promoting early tag removal. Streamlined forms have been used to reduce loading, but these designs can accelerate flow over the top of the tag. This non-axisymmetric flow results in large lift forces (normal to the animal) that become the dominant force component at high speeds...
2017: PloS One
https://www.readbyqxmd.com/read/28187075/investigating-the-association-between-lower-extremity-and-low-back-symptoms-among-saskatchewan-farmers-using-the-standardized-nordic-questionnaire
#5
Samuel Kwaku Essien, Catherine Trask, James Dosman, Brenna Bath
STUDY DESIGN: Cross sectional survey OBJECTIVE.: To investigated the association between self-reported low back symptoms and symptoms in the hip, knee, and ankle in a high-risk occupational group SUMMARY OF BACKGROUND DATA.: Low back pain, with or without lower extremity referral, poses a major challenge to occupational productivity, especially in farming. Although low back symptoms can occur independent of lower extremity symptoms, anatomical positioning of nerves supplying the lower limbs means structural and physiological changes in the spine can lead to referred pain in the lower limbs, but the magnitude of the association between low back and lower extremity symptoms is unclear...
February 9, 2017: Spine
https://www.readbyqxmd.com/read/28181774/strength-training-and-body-composition-in-middle-age-women
#6
Rachelle Burrup, Larry A Tucker, James D LeCHEMINANT, Bruce W Bailey
BACKGROUND: Strength training is a sound method to improve body composition. However, the effect of age, diet, menopause, and physical activity on the relationship between strength training and body composition in women remains unknown. The purpose of this study was to examine the intricacies of the relationship between strength training and body composition in 257 middle-age women and to quantify the effect of these factors on the association. METHODS: The study was cross-sectional...
February 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28170186/live-tissue-imaging-to-elucidate-mechanical-modulation-of-stem-cell-niche-quiescence
#7
Nicole Y C Yu, Connor A O'Brien, Iveta Slapetova, Renee M Whan, Melissa L Knothe Tate
The periosteum, a composite cellular connective tissue, bounds all nonarticular bone surfaces. Like Velcro, collagenous Sharpey's fibers anchor the periosteum in a prestressed state to the underlying bone. The periosteum provides a niche for mesenchymal stem cells. Periosteal lifting, as well as injury, causes cells residing in the periosteum (PDCs) to change from an immobile, quiescent state to a mobile, active state. The physical cues that activate PDCs to home to and heal injured areas remain a conundrum...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28168644/minimal-effect-of-patella-eversion-on-ligament-balancing-in-cruciate-retaining-total-knee-arthroplasty
#8
Eirik Aunan, Thomas Kibsgård, Stephan M Röhrl
PURPOSE: The effect of patellar eversion on ligament laxity measurements is still unclear. The purpose of this study was to investigate the influence of patellar eversion on medial and lateral ligament laxity measurements performed intra-operatively in total knee arthroplasty (TKA). METHODS: A total of 49 knees (27 female) with mean age 70 years (42-83) and mean body mass index of 28.5 were operated consecutively with a cruciate-retaining prosthesis. Medial and lateral ligament laxity in extension and in 90° of flexion was measured with the spatula-method intra-operatively after implantation of the prosthetic components with the patella everted and thereafter with the patella repositioned...
February 7, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28167499/occupational-factors-and-markers-of-ovarian-reserve-and-response-among-women-at-a-fertility-centre
#9
Lidia Mínguez-Alarcón, Irene Souter, Paige L Williams, Jennifer B Ford, Russ Hauser, Jorge E Chavarro, Audrey J Gaskins
OBJECTIVES: To explore whether work schedules and physically demanding work were associated with markers of ovarian reserve and response. METHODS: This analysis included women (n=473 and n=313 for ovarian reserve and ovarian response analysis, respectively) enrolled in a prospective cohort study of couples presenting to an academic fertility centre (2004-2015). Information on occupational factors was collected on a take-home questionnaire, and reproductive outcomes were abstracted from electronic medical records...
February 6, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28163885/flies-compensate-for-unilateral-wing-damage-through-modular-adjustments-of-wing-and-body-kinematics
#10
Florian T Muijres, Nicole A Iwasaki, Michael J Elzinga, Johan M Melis, Michael H Dickinson
Using high-speed videography, we investigated how fruit flies compensate for unilateral wing damage, in which loss of area on one wing compromises both weight support and roll torque equilibrium. Our results show that flies control for unilateral damage by rolling their body towards the damaged wing and by adjusting the kinematics of both the intact and damaged wings. To compensate for the reduction in vertical lift force due to damage, flies elevate wingbeat frequency. Because this rise in frequency increases the flapping velocity of both wings, it has the undesired consequence of further increasing roll torque...
February 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28163879/aerodynamic-evaluation-of-wing-shape-and-wing-orientation-in-four-butterfly-species-using-numerical-simulations-and-a-low-speed-wind-tunnel-and-its-implications-for-the-design-of-flying-micro-robots
#11
Alejandro Ortega Ancel, Rodney Eastwood, Daniel Vogt, Carter Ithier, Michael Smith, Rob Wood, Mirko Kovač
Many insects are well adapted to long-distance migration despite the larger energetic costs of flight for small body sizes. To optimize wing design for next-generation flying micro-robots, we analyse butterfly wing shapes and wing orientations at full scale using numerical simulations and in a low-speed wind tunnel at 2, 3.5 and 5 m s(-1). The results indicate that wing orientations which maximize wing span lead to the highest glide performance, with lift to drag ratios up to 6.28, while spreading the fore-wings forward can increase the maximum lift produced and thus improve versatility...
February 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28144846/virtoscan-a-mobile-low-cost-photogrammetry-setup-for-fast-post-mortem-3d-full-body-documentations-in-x-ray-computed-tomography-and-autopsy-suites
#12
Sören Kottner, Lars C Ebert, Garyfalia Ampanozi, Marcel Braun, Michael J Thali, Dominic Gascho
Injuries such as bite marks or boot prints can leave distinct patterns on the body's surface and can be used for 3D reconstructions. Although various systems for 3D surface imaging have been introduced in the forensic field, most techniques are both cost-intensive and time-consuming. In this article, we present the VirtoScan, a mobile, multi-camera rig based on close-range photogrammetry. The system can be integrated into automated PMCT scanning procedures or used manually together with lifting carts, autopsy tables and examination couch...
March 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28135227/systematic-review-and-meta-analysis-of-predictors-of-military-task-performance-maximal-lift-capacity
#13
Jay R Hydren, Alexander S Borges, Marilyn A Sharp
Physical performance tests (e.g., physical employment tests, return-to-duty tests) are commonly used to predict occupational task performance to assess the ability of individuals to do a job. The purpose of this systematic review was to identify predictive tests that correlate well with maximal lifting capacity in military personnel. Three databases were searched and experts in the field were contacted, resulting in the identification of nine reports confined to military personnel that presented correlations between predictor tests and job tasks that measured maximal lift capacity...
January 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28131329/a-cross-sectional-study-investigating-weight-management-motivations-methods-and-perceived-healthy-eating-and-physical-activity-influences-in-women-up-to-five-years-following-childbirth
#14
Lisa Vincze, Megan E Rollo, Melinda J Hutchesson, Tracy L Burrows, Lesley MacDonald-Wicks, Michelle Blumfield, Clare E Collins
OBJECTIVE: to explore motivations for weight change, weight loss methods used and factors perceived to influence healthy eating and physical activity for weight management following childbirth, and to evaluate differences by socio-demographic, weight status and pregnancy characteristics. DESIGN: cross-sectional online survey completed from May to August 2013. PARTICIPANTS: Australian women (n=874, aged 32.8±4.5 years, pre-pregnancy Body Mass Index 25...
January 14, 2017: Midwifery
https://www.readbyqxmd.com/read/28121261/occupational-injuries-and-exposures-among-emergency-medical-services-workers
#15
Audrey A Reichard, Suzanne M Marsh, Theresa R Tonozzi, Srinivas Konda, Mirinda A Gormley
OBJECTIVE: Emergency medical services (EMS) workers incur occupational injuries at a higher rate than the general worker population. This study describes the circumstances of occupational injuries and exposures among EMS workers to guide injury prevention efforts. METHODS: The National Institute for Occupational Safety and Health collaborated with the National Highway Traffic Safety Administration to conduct a follow-back survey of injured EMS workers identified from a national sample of hospital emergency departments (EDs) from July 2010 through June 2014...
January 25, 2017: Prehospital Emergency Care
https://www.readbyqxmd.com/read/28120640/blockade-of-nmda-receptors-decreased-spinal-microglia-activation-in-bee-venom-induced-acute-inflammatory-pain-in-rats
#16
Li Li, Yongfang Wu, Zhifeng Bai, Yuyan Hu, Wenbin Li
OBJECTIVES: Microglial cells in spinal dorsal horn can be activated by nociceptive stimuli and the activated microglial cells release various cytokines enhancing the nociceptive transmission. However, the mechanisms underlying the activation of spinal microglia during nociceptive stimuli have not been well understood. In order to define the role of NMDA receptors in the activation of spinal microglia during nociceptive stimuli, the present study was undertaken to investigate the effect of blockade of NMDA receptors on the spinal microglial activation induced by acute peripheral inflammatory pain in rats...
March 2017: Neurological Research
https://www.readbyqxmd.com/read/28068753/retrospective-matched-pair-cohort-study-on-effect-of-bisegmental-fenestration-versus-hemilaminectomy-for-bisegmental-spinal-canal-stenosis-at-l3-l4-and-l4-l5
#17
Julia Schüppel, Friedrich Weber
Background The main symptoms of degenerative lumbar spinal canal stenosis are progressive back pain, spinal claudication, and, occasionally, sensory and motor deficits. Impairments particularly occur during walking, standing, and sitting. Thus social and vocational activities are increasingly restricted, causing considerable suffering for patients. Surgical therapies are superior to conservative ones. This article studies the outcome of 2-level fenestration versus hemilaminectomy for bisegmental spinal stenosis decompression...
January 9, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28068368/a-virtual-out-of-body-experience-reduces-fear-of-death
#18
Pierre Bourdin, Itxaso Barberia, Ramon Oliva, Mel Slater
Immersive virtual reality can be used to visually substitute a person's real body by a life-sized virtual body (VB) that is seen from first person perspective. Using real-time motion capture the VB can be programmed to move synchronously with the real body (visuomotor synchrony), and also virtual objects seen to strike the VB can be felt through corresponding vibrotactile stimulation on the actual body (visuotactile synchrony). This setup typically gives rise to a strong perceptual illusion of ownership over the VB...
2017: PloS One
https://www.readbyqxmd.com/read/28059781/wing-kinematics-measurement-and-aerodynamics-of-a-dragonfly-in-turning-flight
#19
Chengyu Li, Haibo Dong
This study integrates high-speed photogrammetry, 3D surface reconstruction, and computational fluid dynamics to explore a dragonfly (Erythemis Simplicicollis) in free flight. Asymmetric wing kinematics and the associated aerodynamic characteristics of a turning dragonfly are analyzed in detail. Quantitative measurements of wing kinematics show that compared to the outer wings, the inner wings sweep more slowly with a higher angle of attack during the downstroke, whereas they flap faster with a lower angle of attack during the upstroke...
February 3, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28058512/a-novel-approach-for-robotic-mobilization-of-the-splenic-flexure
#20
O Isik, C Benlice, E Gorgun
BACKGROUND: The techniques of robotic splenic flexure mobilization in the colorectal surgery setting are not well defined and have been challenging due to limited range of motion of the second-generation robotic platform in multiple quadrants. METHODS: This report describes a novel technique for robotic splenic flexure mobilization with medial-to-lateral approach without a need for robotic cart repositioning during left-sided colon and rectal surgery. The dissection is started with ligation of the inferior mesenteric artery and vein...
January 2017: Techniques in Coloproctology
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