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https://www.readbyqxmd.com/read/29438300/compact-hip-force-sensor-for-a-gait-assistance-exoskeleton-system
#1
Hyundo Choi, Keehong Seo, Seungyong Hyung, Youngbo Shim, Soo-Chul Lim
In this paper, we propose a compact force sensor system for a hip-mounted exoskeleton for seniors with difficulties in walking due to muscle weakness. It senses and monitors the delivered force and power of the exoskeleton for motion control and taking urgent safety action. Two FSR (force-sensitive resistors) sensors are used to measure the assistance force when the user is walking. The sensor system directly measures the interaction force between the exoskeleton and the lower limb of the user instead of a previously reported force-sensing method, which estimated the hip assistance force from the current of the motor and lookup tables...
February 13, 2018: Sensors
https://www.readbyqxmd.com/read/29421466/getting-pain-on-the-table-in-primary-care-physical-exams
#2
Amanda McArthur
Using conversation analysis and a dataset of 171 video recordings of US primary care encounters (2003-2005), this paper examines patients' unsolicited pain informings - e.g. "that hurts" - during the physical examination phase of acute care visits. I argue that when patients experience pain in a physical exam but have not been asked a question like "does that hurt?", they face an interactional dilemma. Having presented their health problem to a doctor, they have tacitly set in motion epistemic and interactional asymmetries through which the doctor investigates the problem on their behalf...
January 16, 2018: Social Science & Medicine
https://www.readbyqxmd.com/read/29420555/validity-and-reliability-of-an-accelerometer-based-player-tracking-device
#3
Daniel P Nicolella, Lorena Torres-Ronda, Kase J Saylor, Xavi Schelling
This study aimed to determine the intra- and inter-device accuracy and reliability of wearable athletic tracking devices, under controlled laboratory conditions. A total of nineteen portable accelerometers (Catapult OptimEye S5) were mounted to an aluminum bracket, bolted directly to an Unholtz Dickie 20K electrodynamic shaker table, and subjected to a series of oscillations in each of three orthogonal directions (front-back, side to side, and up-down), at four levels of peak acceleration (0.1g, 0.5g, 1.0g, and 3...
2018: PloS One
https://www.readbyqxmd.com/read/29406344/digital-radiography-in-total-hip-arthroplasty-technique-and-radiographic-results
#4
Brad L Penenberg, Sanjum P Samagh, Sean S Rajaee, Antonia Woehnl, William W Brien
BACKGROUND: Obtaining the ideal acetabular cup position in total hip arthroplasty remains a challenge. Advancements in digital radiography and image analysis software allow the assessment of the cup position during the surgical procedure. This study describes a validated technique for evaluating cup position during total hip arthroplasty using digital radiography. METHODS: Three hundred and sixty-nine consecutive patients undergoing total hip arthroplasty were prospectively enrolled...
February 7, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29404226/automatic-detection-of-compensation-during-robotic-stroke-rehabilitation-therapy
#5
Ying Xuan Zhi, Michelle Lukasik, Michael H Li, Elham Dolatabadi, Rosalie H Wang, Babak Taati
Robotic stroke rehabilitation therapy can greatly increase the efficiency of therapy delivery. However, when left unsupervised, users often compensate for limitations in affected muscles and joints by recruiting unaffected muscles and joints, leading to undesirable rehabilitation outcomes. This paper aims to develop a computer vision system that augments robotic stroke rehabilitation therapy by automatically detecting such compensatory motions. Nine stroke survivors and ten healthy adults participated in this study...
2018: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29401792/method-for-simultaneous-measurement-of-five-dof-motion-errors-of-a-rotary-axis-using-a-single-mode-fiber-coupled-laser
#6
Jiakun Li, Qibo Feng, Chuanchen Bao, Yuqiong Zhao
The rotary axis is the basis for rotational motion. Its motion errors have critical effects on the accuracy of the related equipment, such as a five-axis computer numerical control machine tool. There are several difficult problems in the implementation of high-precision and fast measurement of the multi-degree-of-freedom motion errors of a rotary axis. In this paper, a novel method for the simultaneous measurement of five-degree-of-freedom motion errors of a rotary axis is proposed, which uses a single-mode fiber-coupled laser with a full-circle measuring range...
February 5, 2018: Optics Express
https://www.readbyqxmd.com/read/29388320/geometric-accuracy-of-the-mr-imaging-techniques-in-the-presence-of-motion
#7
Tarraf Torfeh, Rabih Hammoud, Tarek El Kaissi, Maeve McGarry, Souha Aouadi, Hadi Fayad, Noora Al-Hammadi
Magnetic Resonance Imaging (MRI) is increasingly being used for improving tumor delineation and tumor tracking in the presence of respiratory motion. The purpose of this work is to design and build an MR compatible motion platform and to use it for evaluating the geometric accuracy of MR imaging techniques during respiratory motion. The motion platform presented in this work is composed of a mobile base made up of a flat plate and four wheels. The mobile base is attached from one end and through a rigid rod to a synchrony motion table by Accuray® placed at the end of the MRI table and from the other end to an elastic rod...
February 1, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29368138/sagittal-balance-and-idiopathic-scoliosis-does-final-sagittal-alignment-influence-outcomes-degeneration-rate-or-failure-rate
#8
REVIEW
Brice Ilharreborde
INTRODUCTION: In the last decade, spine surgeons have been impacted by the "sagittal plane analysis revolution". Significant correlations have been found in adult spinal deformity (ASD) between sagittal lumbo-pelvic parameters and functional outcomes, but most of them do not apply in adolescent idiopathic scoliosis (AIS). Meanwhile, instrumentation and reduction strategies have considerably evolved. This paper aims to describe the preoperative sagittal alignment in AIS, and to report literature evidence regarding the influence of postoperative sagittal balance on complication rates, low back pain incidence and disc degeneration...
January 24, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29357457/neck-movement-but-not-neck-position-modulates-skin-sympathetic-nerve-activity-supplying-the-lower-limbs-of-humans
#9
Philip S Bolton, Elie Hammam, Vaughan G Macefield
We previously showed that dynamic, but not static, neck displacement modulates muscle sympathetic nerve activity (MSNA) to lower limbs of humans. However, it is not known whether dynamic neck displacement modulates skin sympathetic nerve activity (SSNA). Tungsten microelectrodes inserted into the common peroneal nerve were used to record SSNA in 5 female and 4 male subjects lying supine on a table that fixed their head in space but allowed trapezoidal ramp (8.1 {plus minus} 1.20/s) and hold (17.50 for 53s) or sinusoidal (350 peak-to-peak at 0...
December 27, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29354968/-kinetic-mechanism-of-electroacupuncture-for-stair-climbing-in-knee-osteoarthritis-patients
#10
Xiangbin Wang, Xuerong Xie, Meijin Hou, Xiaoling Wang, Jian Chen, Jiao Yu, Xiang Li
OBJECTIVE: To observe the kinetic change that reflects joint loading in different planes during stair climbing in knee osteoarthritis (KOA) after electroacupuncture (EA) by three-dimensional motion analysis, so as to provide reference for its biomechanical mechanism treated with acupuncture. METHODS: Forty KOA patients, in accordance with the random number table, were assigned into an observation group and a control group, 20 cases in each one and finally 18 cases completed...
October 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29351158/physical-performance-measures-of-flexibility-hip-strength-lower-limb-power-and-trunk-endurance-in-healthy-navy-cadets-normative-data-and-differences-between-sex-and-limb-dominance
#11
Thiago Jambo Alves Lopes, Milena Simic, Daniel de Souza Alves, Priscila Dos Santos Bunn, Allan Inoue Rodrigues, Bruno de Souza Terra, Maicom da Silva Lima, Fabrício Miranda Ribeiro, Patrick Vilão, Evangelos Pappas
The objectives were to provide normative data on commonly used physical performance tests that may be associated with musculoskeletal injuries in Navy cadets, and assess for sex and limb dominance differences. A large cohort of Navy cadets were assessed for physical performance tests of flexibility (ankle dorsiflexion range of motion and sit and reach), isometric hip strength, lower limb power (single leg hop), and trunk endurance (plank and side plank tests). Besides providing normative data tables, sex and limb dominance differences were assessed by a two-way mixed ANOVA...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29350555/outcomes-of-latarjet-procedure-compared-with-bankart-repair-for-recurrent-traumatic-anterior-shoulder-instability
#12
Kellie C Huxel Bliven, Gail P Parr
Reference/Citation:  An VV, Sivakumar BS, Phan K, Trantalis J. A systematic review and meta-analysis of clinical and patient-reported outcomes following two procedures for recurrent traumatic anterior instability of the shoulder: Latarjet procedure vs. Bankart repair. J Shoulder Elbow Surg. 2016;25(5):853-863. CLINICAL QUESTION:   Are clinical and patient-reported outcomes different between the Latarjet and Bankart repair stabilization procedures when performed for recurrent traumatic anterior shoulder instability? DATA SOURCES:   Ovid MEDLINE, PubMed, Cochrane databases, American College of Physicians Journal Club, and Database of Abstracts of Review of Effectiveness were searched up to June 2015...
January 19, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29332752/the-effects-of-neck-mobilization-in-patients-with-chronic-neck-pain-a-randomized-controlled-trial
#13
Muhammad Nazim Farooq, Mohammad A Mohseni-Bandpei, Syed Amir Gilani, Muhammad Ashfaq, Qamar Mahmood
OBJECTIVE: To determine the effect of mobilization and routine physiotherapy on pain, disability, neck range of motion (ROM) and neck muscle endurance (NME) in patients having chronic mechanical neck pain (NP). METHODS: Sixty eight patients with chronic mechanical NP were randomly allocated into two groups by using a computer generated random sequence table with 34 patients in the multi-modal mobilization group and 34 patients in the routine physiotherapy group...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29275282/study-of-factors-involved-in-the-gravimetric-separation-process-to-treat-soil-contaminated-by-municipal-solid-waste
#14
Ikbel Mouedhen, Lucie Coudert, Jean-François Blais, Guy Mercier
The current research investigated the effectiveness of a gravimetric process (shaking table) to treat soil contaminated by municipal solid waste. A detailed characterization of the inorganic pollutants was performed, followed by concentrating the metals within smaller volumes using the shaking table technology. The densimetric examination of the 1-2 mm and 0.250-1 mm fractions of the contaminated soil showed that lead (Pb), copper (Cu), and tin (Sn) were mostly concentrated in the heavy fraction (metal removals > 50%)...
December 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29215500/feasibility-and-accuracy-of-thoracolumbar-minimally-invasive-pedicle-screw-placement-with-augmented-reality-navigation-technology
#15
Adrian Elmi-Terander, Rami Nachabe, Halldor Skulason, Kyrre Pedersen, Michael Söderman, John Racadio, Drazenko Babic, Paul Gerdhem, Erik Edström
STUDY DESIGN: Cadaveric laboratory study. OBJECTIVE: To assess the feasibility and accuracy of minimally invasive thoracolumbar pedicle screw placement using augmented reality (AR) surgical navigation SUMMARY OF BACKGROUND DATA.: Minimally invasive spine (MIS) surgery has increasingly become the method of choice for a wide variety of spine pathologies. Navigation technology based on AR has been shown to be feasible, accurate and safe in open procedures. AR technology may also be used for MIS surgery...
December 19, 2017: Spine
https://www.readbyqxmd.com/read/29205787/system-for-ct-guided-needle-placement-in-the-thorax-and-abdomen-a-design-for-clinical-acceptability-applicability-and-usability
#16
Maarten M Arnolli, Martijn Buijze, Michel Franken, Koert P de Jong, Dannis M Brouwer, Ivo A M J Broeders
BACKGROUND: Various systems exist for CT-guided needle placement in the thorax and abdomen, but widespread adoption is lacking. The goal of this work is to develop a system for precise needle placement with a design focus on clinical acceptability, applicability and usability. METHODS: A system was outlined incorporating a needle guide on a mechanism with a remote centre of motion, manually placeable around the patient at the desired entry point and lockable by push-button to the CT table...
December 5, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29189398/quantification-of-the-effect-of-shuttling-on-computed-tomography-perfusion-parameters-by-investigation-of-aortic-inputs-on-different-table-positions-from-shuttle-mode-scans-of-lung-and-liver-tumors
#17
Payel Ghosh, Adam G Chandler, Brian P Hobbs, Jia Sun, John Rong, David Hong, Vivek Subbiah, Filip Janku, Aung Naing, Wen-Jen Hwu, Chaan S Ng
OBJECTIVES: The aim of this study was to quantify the effect of shuttling on computed tomography perfusion (CTp) parameters derived from shuttle-mode body CT images using aortic inputs from different table positions. METHODS: Axial shuttle-mode CT scans were acquired from 6 patients (10 phases, 2 nonoverlapping table positions 1.4 seconds apart) after contrast agent administration. Artifacts resulting from the shuttling motion were corrected with nonrigid registration before computing CTp maps from 4 aortic levels chosen from the most superior and inferior slices of each table position scan...
November 16, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29185676/effect-of-physiotherapeutic-intervention-on-the-gait-after-the-application-of-botulinum-toxin-in-children-with-cerebral-palsy-systematic-review
#18
Paulo R Fonseca, Renata C Franco de Moura, Manuela Galli, Claudia Santos Oliveira
BACKGROUND: Cerebral palsy is a group of movement and posture development disorders. 90% of this population has gait impairment, often due to the presence of spasticity. A number of studies emphasize the importance of combined physical therapy with botulinum toxin A treatment. However, no consensus can be reached concerning the content of the physiotherapy programme after treatment with botulinum toxin A. AIM: The purpose of the present study was to investigate, through a systematic review of the literature, the effects of physiotherapeutic intervention on gait after botulinum toxin application in children with cerebral palsy...
November 29, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29140167/intra-tester-reliability-and-construct-validity-of-a-hip-abductor-eccentric-strength-test
#19
Richard A Brindle, D David Ebaugh, Clare E Milner
CONTEXT: Side-lying hip abductor strength tests are commonly used to evaluate muscle strength. In a 'break' test the tester applies sufficient force to lower the limb to the table while the patient resists. The peak force is postulated to occur while the leg is lowering, thus representing the participant's eccentric muscle strength. However, it is unclear whether peak force occurs before or after the leg begins to lower. OBJECTIVES: To determine intra-rater reliability and construct validity of a hip abductor eccentric strength test...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29091003/american-college-of-radiology-compliant-short-protocol-breast-mri-for-high-risk-breast-cancer-screening-a-prospective-feasibility-study
#20
Basak E Dogan, Marion E Scoggins, Jong Bum Son, Wei Wei, Rosalind Candelaria, Wei T Yang, Jingfei Ma
OBJECTIVE: The purpose of this study was to assess the feasibility of a short protocol for screening breast MRI that is noninferior to standard-of-care (SOC) MRI in image quality that complies with American College of Radiology accreditation requirements. SUBJECTS AND METHODS: In a prospective feasibility trial, 23 women at high risk underwent both an initial SOC MRI examination that included axial iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) and T1-weighted volume imaging for breast assessment (VIBRANT) dynamic contrast-enhanced sequences and a separate short breast MRI protocol comprising a fast spin-echo (FSE) triple-echo Dixon T2 sequence for T2-weighted imaging and a 3D dual-echo fast spoiled gradient-echo two-point Dixon sequence for dynamic contrast-enhanced imaging from October 1, 2015, through May 2, 2016...
November 1, 2017: AJR. American Journal of Roentgenology
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