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https://www.readbyqxmd.com/read/28520819/in-vitro-analysis-of-the-segmental-flexibility-of-the-thoracic-spine
#1
Hans-Joachim Wilke, Andrea Herkommer, Karin Werner, Christian Liebsch
Basic knowledge about the thoracic spinal flexibility is limited and to the authors' knowledge, no in vitro studies have examined the flexibility of every thoracic spinal segment under standardized experimental conditions using pure moments. In our in vitro study, 68 human thoracic functional spinal units including the costovertebral joints (at least n = 6 functional spinal units per segment from T1-T2 to T11-T12) were loaded with pure moments of ±7.5 Nm in flexion/extension, lateral bending, and axial rotation in a custom-built spine tester to analyze range of motion (ROM) and neutral zone (NZ)...
2017: PloS One
https://www.readbyqxmd.com/read/28515758/medical-robots-in-cardiac-surgery-application-and-perspectives
#2
Karolina Kroczek, Piotr Kroczek, Zbigniew Nawrat
Medical robots offer new standards and opportunities for treatment. This paper presents a review of the literature and market information on the current situation and future perspectives for the applications of robots in cardiac surgery. Currently in the United States, only 10% of thoracic surgical procedures are conducted using robots, while globally this value remains below 1%. Cardiac and thoracic surgeons use robotic surgical systems increasingly often. The goal is to perform more than one hundred thousand minimally invasive robotic surgical procedures every year...
March 2017: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/28491215/clinical-outcomes-of-posterior-spinal-stabilization-with-rigid-vertical-strut-and-spinal-process-wires-the-adeolu-s-technique-in-a-developing-country
#3
Taopheeq Bamidele Rabiu
INTRODUCTION: Conventional instrumentation for spinal stabilization is beyond the reach of many patients in developing countries. A low-cost and easily-available method of spinal stabilization using vertical struts and spinal process wires (Adeolu's technique) was recently introduced in Nigeria. We describe the clinical outcomes of a prospective series of patients managed using the technique. METHODS: From 2011 to 2012, we performed posterior spinal stabilization in eighteen patients using the technique...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28462572/kinematics-of-the-thorax-and-pelvis-during-accelerated-sprinting
#4
Ryu Nagahara, Takeo Matsubayashi, Akifumi Matsuo, Koji Zushi
BACKGROUND: This study aimed to describe changes in thoracic and pelvic movements during the acceleration phase of maximal sprinting, and to clarify which kinematic variable relates to better accelerated sprinting performance. METHODS: Twelve male sprinters performed 60-m sprints, during which three-dimensional step-to-step changes in thoracic and pelvic angles, as well as the trunk quasi-joint angle, were obtained throughout a 50-m distance. RESULTS: The patterns of thoracic and pelvic movements were maintained throughout the entire acceleration phase, although the phase profiles of the relative movements between the thorax and pelvis in three planes differed...
April 28, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28449958/predicting-3d-thoracic-kyphosis-using-traditional-2d-radiographic-measurements-in-adolescent-idiopathic-scoliosis
#5
Kevin C Parvaresh, Emily J Osborn, Fredrick G Reighard, Joshua Doan, Tracey P Bastrom, Peter O Newton
STUDY DESIGN: Retrospective. OBJECTIVE: To develop and validate a prediction formula to estimate three-dimensional (3D) T5-T12 kyphosis in adolescent idiopathic scoliosis (AIS) from standard two-dimensional (2D) radiographic measurements. SUMMARY OF BACKGROUND DATA: 2D measurements of thoracic kyphosis in AIS patients overestimate 3D kyphosis; however, there is a lack of widespread availability of 3D imaging technology. METHODS: Retrospective review was performed for AIS patients with right thoracic curves evaluated with EOS Imaging from January 2010 to June 2014...
May 2017: Spine Deformity
https://www.readbyqxmd.com/read/28439703/the-impact-of-direct-vertebral-rotation-dvr-on-radiographic-outcome-in-surgical-correction-of-idiopathic-scoliosis
#6
Wiktor Urbanski, Michal J Wolanczyk, Wojciech Jurasz, Miroslaw Kulej, Piotr Morasiewicz, Szymon Lukasz Dragan, Marek Sasiadek, Szymon Feliks Dragan
INTRODUCTION: Recent developments of spinal instruments allow to address nearly all components of idiopathic scoliosis. Direct vertebral rotation (DVR) maneuver was introduced to correct apical axial vertebral rotation. It is however still not well established how efficiently DVR affects results of scoliosis correction. The object of the study was to evaluate en bloc apical vertebral rotation (DVR) and its impact on coronal and sagittal correction of the spine in patients undergoing surgical scoliosis treatment...
April 24, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28437349/a-new-navigational-tool-for-pedicle-screw-placement-in-patients-with-severe-scoliosis-a-pilot-study-to-prove-feasibility-accuracy-and-identify-operative-challenges
#7
Michael Putzier, Patrick Strube, Riccardo Cecchinato, Claudio Lamartina, Eike K Hoff
STUDY DESIGN: Pilot study. OBJECTIVE: To develop and validate the feasibility and accuracy of a newly designed navigational spinal instrument guiding tool for patient-matched thoracic and lumbar pedicle screw placement in patients with severe scoliosis, and to identify intraoperative challenges that may be relevant. SUMMARY OF BACKGROUND DATA: Pedicle screw placement is challenging in severely rotated scoliotic spine with small diameters and asymmetrical shape of the pedicles and vertebrae...
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28437337/axial-plane-deformity-of-the-shoulder-in-adolescent-idiopathic-scoliosis
#8
Venugopal K Menon, Naveen Tahasildar, Haroon M Pillay, Anbuselvam M
STUDY DESIGN: Prospective observational study. OBJECTIVE: To study axial plane deformation of the shoulder in adolescent idiopathic scoliosis (AIS) and try to correlate it with curve type and surgical correction. SUMMARY OF BACKGROUND DATA: It is established that AIS is a 3-dimensional deformity. The rib hump is the most common manifestation of axial plane deformations; the least common manifestation seems to be upper trunk and shoulder rotation, which has been hitherto undescribed...
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28436852/frequency-selective-computed-tomography-applications-during-periodic-thoracic-motion
#9
Jacob Herrmann, Eric A Hoffman, David W Kaczka
We seek to use computed tomography (CT) to characterize regional lung parenchymal deformation during highfrequency and multi-frequency oscillatory ventilation. Periodic motion of thoracic structures results in artifacts of CT images obtained by standard reconstruction algorithms, especially for frequencies exceeding that of the X-ray source rotation. In this study, we propose an acquisition and reconstruction technique for high resolution imaging of the thorax during periodic motion. Our technique relies on phase-binning projections according to the frequency of subject motion relative to the scanner rotation, prior to volumetric reconstruction...
April 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28432739/effect-of-a-4-week-elastic-resistance-band-training-regimen-on-back-kinematics-in-horses-trotting-in-hand-and-on-the-lunge
#10
T Pfau, V Simons, N Rombach, N Stubbs, R Weller
REASONS FOR PERFORMING STUDY: Training and rehabilitation techniques aiming at improving core muscle strength may result in increased dynamic stability of the equine vertebral column. A system of elastic resistance bands is suggested to provide proprioceptive feedback during motion to encourage recruitment of core abdominal and hindquarter musculature for improved dynamic stability. OBJECTIVES: To quantify the effects of a specific resistance band system on back kinematics during trot in-hand and during lungeing at beginning and end of a 4-week exercise programme...
April 22, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28428982/biomechanical-effect-of-pedicle-screw-distribution-in-ais-instrumentation-using-a-segmental-translation-technique-computer-modeling-and-simulation
#11
Xiaoyu Wang, A Noelle Larson, Dennis G Crandall, Stefan Parent, Hubert Labelle, Charles G T Ledonio, Carl-Eric Aubin
BACKGROUND: Efforts to select the appropriate number of implants in adolescent idiopathic scoliosis (AIS) instrumentation are hampered by a lack of biomechanical studies. The objective was to biomechanically evaluate screw density at different regions in the curve for AIS correction to test the hypothesis that alternative screw patterns do not compromise anticipated correction in AIS when using a segmental translation technique. METHODS: Instrumentation simulations were computationally performed for 10 AIS cases...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28414169/a-biomechanical-investigation-of-different-screw-head-designs-for-vertebral-derotation-in-scoliosis-surgery
#12
Po-Yi Liu, Po-Liang Lai, Chun-Li Lin
BACKGROUND CONTEXT: The posterior pedicle screw-rod system, which is widely used to correct spinal deformities, achieves a good correction rate in the frontal and coronal planes but not in the axial plane. Direct vertebral derotation (DVD) was developed to correct axial plane deformities. However, the design of screw head and body connection, in terms of monoaxial, polyaxial, and uniplanar screw, may influence the efficiency of DVD. PURPOSE: This study compared the efficiency of a newly designed uniplanar screw with that of monoaxial and polyaxial screws in the DVD maneuver...
April 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28406557/determinants-of-iliac-blade-orientation-in-anthropoid-primates
#13
Emily R Middleton, Zachariah J Winkler, Ashley S Hammond, J Michael Plavcan, Carol V Ward
Orientation of the iliac blades is a key feature that appears to distinguish extant apes from monkeys. Iliac morphology is hypothesized to reflect variation in thoracic shape that, in turn, reflects adaptations for shoulder and forearm function in anthropoids. Iliac orientation is traditionally measured relative to the acetabulum, whereas functional explanations pertain to its orientation relative to the cardinal anatomical planes. We investigated iliac orientation relative to a median plane using digital models of hipbones registered to landmark data from articulated pelves...
May 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28401278/arthroscopic-reduction-and-fixation-for-displaced-greater-tuberosity-fractures-using-the-modified-suture-bridge-technique
#14
RenLong Li, Ming Cai, Kun Tao
PURPOSE: The aim of this study was to evaluate the early clinical outcomes of arthroscopic treatment of avulsion or comminuted fractures of the greater tuberosity (GT) using a modified suture-bridge technique. METHODS: Between February 2013 and November 2015, 14 patients with displaced or comminuted fractures of GT were arthroscopically treated using a modified suturebridge technique. Displacement of the GT fragments was > 3 mm in any plane. An analysis of follow-up results including the University of California, Los Angeles (UCLA) shoulder scale; the shoulder index of the American Shoulder and Elbow Surgeons (ASES); the simple shoulder test (SST); and shoulder range of motion (ROM), is presented...
April 11, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28370000/radiographic-and-computed-tomographic-appearance-of-tracheal-collapse-with-axial-rotation-in-four-dogs
#15
H G Heng, C K Lim, B Gutierrez-Crespo, L F Guptill
Tracheal collapse with axial rotation was diagnosed in four dogs. Radiographs showed increased tracheal dorsoventral height at the caudal cervical and thoracic inlet with and apparent intraluminal soft tissue opacity, mimicking an intraluminal tracheal foreign body. Computed tomography confirmed dorsoventral tracheal collapse with axial rotation in all dogs. Short-term outcome with medical treatment of all dogs was excellent.
April 3, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28367291/learning-curves-for-three-specific-procedures-by-anesthesiology-residents-using-the-learning-curve-cumulative-sum-lc-cusum-test
#16
Gregoire Weil, Cyrus Motamed, David J Biau, Marie Laurence Guye
BACKGROUND: The learning curve cumulative sum (LC-CUSUM) test is an innovative tool that allows quantitative monitoring of individual medical performance during the learning process by determining when a predefined acceptable level of performance is reached. This study used the LC-CUSUM test to monitor the learning process and failure rate of anesthesia residents training for specific subspecialty anesthesia procedures. METHODS: The study included 490 tracheal punctures (TP) for jet ventilation, 340 thoracic epidural analgesia (TEA) procedures, and 246 fiberoptic nasal intubations (FONI) performed by 18 residents during their single 6-month rotation...
April 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28365064/subject-specific-2d-3d-image-registration-and-kinematics-driven-musculoskeletal-model-of-the-spine
#17
A H Eskandari, N Arjmand, A Shirazi-Adl, F Farahmand
An essential input to the musculoskeletal (MS) trunk models that estimate muscle and spine forces is kinematics of the thorax, pelvis, and lumbar vertebrae. While thorax and pelvis kinematics are usually measured via skin motion capture devices (with inherent errors on the proper identification of the underlying bony landmarks and the relative skin-sensor-bone movements), those of the intervening lumbar vertebrae are commonly approximated at fixed proportions based on the thorax-pelvis kinematics. This study proposes an image-based kinematics measurement approach to drive subject-specific (musculature, geometry, mass, and center of masses) MS models...
March 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28356648/effect-of-maitland-mobilization-in-cervical-and-thoracic-spine-and-therapeutic-exercise-on-functional-impairment-in-individuals-with-chronic-neck-pain
#18
Keun-Su Lee, Joon-Hee Lee
[Purpose] This study evaluated joint mobilization and therapeutic exercise applied to the cervical spine and upper thoracic spine for functional impairment caused by chronic neck pain. [Subjects and Methods] Eighteen study subjects were randomly assigned to two groups of nine people each. Therapeutic exercise only was applied to the cervical and upper thoracic spine for Group I, while both therapeutic exercise and joint mobilization were applied to Group II. The visual analog scale, neck disability index, active cervical range of motion, static balance capacity, and muscle tone were assessed with a pre-test...
March 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28332863/male-and-female-worldsid-and-post-mortem-human-subject-responses-in-full-scale-vehicle-tests
#19
Narayan Yoganandan, John Humm, Frank Pintar, Heather Rhule, Kevin Moorhouse, Brian Suntay, Jim Stricklin, Rodney Rudd, Matthew Craig
OBJECTIVE: This study compares the responses of male and female WorldSID dummies with post mortem human subject (PMHS) responses in full-scale vehicle tests. METHODS: Tests were conducted according to the FMVSS-214 protocols and using the U.S. Side Impact New Car Assessment Program change in velocity to match PMHS experiments, published earlier. Moving deformable barrier (MDB) tests were conducted with the male and female surrogates in the left front and left rear seats...
March 23, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28331906/associations-between-sarcopenia-and-degenerative-lumbar-scoliosis-in-older-women
#20
Yawara Eguchi, Munetaka Suzuki, Hajime Yamanaka, Hiroshi Tamai, Tatsuya Kobayashi, Sumihisa Orita, Kazuyo Yamauchi, Miyako Suzuki, Kazuhide Inage, Kazuki Fujimoto, Hirohito Kanamoto, Koki Abe, Yasuchika Aoki, Tomoaki Toyone, Tomoyuki Ozawa, Kazuhisa Takahashi, Seiji Ohtori
BACKGROUND: Age-related sarcopenia can cause various forms of physical disabilities. We investigated how sarcopenia affects degenerative lumbar scoliosis (DLS) and lumbar spinal canal stenosis (LSCS). METHODS: Subjects comprised 40 elderly women (mean age 74 years) with spinal disease whose chief complaints were low back pain and lower limb pain. They included 15 cases of DLS (mean 74.8 years) and 25 cases of LSCS (mean age 72.9 years). We performed whole-body dual-energy X-ray absorptiometry (DXA) to analyze body composition, including appendicular and trunk skeletal muscle mass index (SMI; lean mass (kg)/height (m)(2)) and bone mineral density (BMD)...
2017: Scoliosis and Spinal Disorders
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