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Tests and Measures Spine

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https://www.readbyqxmd.com/read/28342975/biomechanical-testing-of-a-peek-based-dynamic-instrumentation-device-in-a-lumbar-spine-model
#1
Christian Herren, Agnes Beckmann, Sabine Meyer, Miguel Pishnamaz, Marion Mundt, Rolf Sobottke, Andreas Prescher, Marcus Stoffel, Bernd Markert, Philipp Kobbe, Hans-Christoph Pape, Peer Eysel, Jan Siewe
BACKGROUND: The purpose of this study was to investigate the range-of-motion after posterior polyetheretherketone-based rod stabilisation combined with a dynamic silicone hinge in order to compare it with titanium rigid stabilisation. METHODS: Five human cadaveric lumbar spines with four vertebra each (L2 to L5) were tested in a temperature adjustable spine-testing set-up in four trials: (1) native measurement; (2) kinematics after rigid monosegmental titanium rod instrumentation with anterior intervertebral bracing of the segment L4/5; (3) kinematics after hybrid posterior polyetheretherketone rod instrumentation combined with a silicone hinge within the adjacent level (L3/4) and (4) kinematics after additional decompression with laminectomy of L4 and bilateral resection of the inferior articular processes (L3)...
March 18, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28341955/osteoplasty-in-crooked-nose-deformity-a-novel-approach
#2
Ilker Koçak, Erol Senturk
BACKGROUND: Crooked nose deformity is one of the most difficult issues to correct by rhinoplasty, as it can result in undesired late sequelae. Revision rates are often high, and numerous operational techniques have been tested. This study describes a crooked nose rhinoplasty technique that reduces the need for a double osteotomy in the long nasal bone. METHODS: This study included 26 patients with an I-shaped crooked nose deformity. In the surgical correction of the crooked nose deformity, previously defined techniques were applied to the cartilage identically...
March 24, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28332863/male-and-female-worldsid-and-post-mortem-human-subject-responses-in-full-scale-vehicle-tests
#3
Narayan Yoganandan, John Humm, Frank Pintar, Heather Rhule, Kevin Moorhouse, Brian Suntay, Jim Stricklin, Rodney Rudd, Matthew Craig
Structured ABSTRACT Objective: To compare 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 United States 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/28327433/sonographic-prediction-of-outcome-of-vacuum-deliveries-a-multicenter-prospective-cohort-study
#4
Birgitte H Kahrs, Sana Usman, Tullio Ghi, Aly Youssef, Erik A Torkildsen, Elsa Lindtjørn, Tilde B Østborg, Sigurlaug Benediktsdottir, Lis Brooks, Lotte Harmsen, Pål R Romundstad, Kjell Å Salvesen, Christoph C Lees, Torbjørn M Eggebø
BACKGROUND: Safe management of the second stage of labor is of great importance. Unnecessary interventions should be avoided and correct timing of interventions focused. Ultrasound assessment of fetal position and station has a potential to improve the precision in diagnosing and managing prolonged or arrested labors. The decision to perform vacuum delivery is traditionally based on subjective assessment by digital vaginal examination and clinical expertise and there is currently no method of objectively quantifying the likelihood of successful delivery...
March 18, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28327181/soluble-oligomeric-amyloid-%C3%AE-induces-calcium-dyshomeostasis-that-precedes-synapse-loss-in-the-living-mouse-brain
#5
Michal Arbel-Ornath, Eloise Hudry, Josiah R Boivin, Tadafumi Hashimoto, Shuko Takeda, Kishore V Kuchibhotla, Steven Hou, Carli R Lattarulo, Arianna M Belcher, Naomi Shakerdge, Pariss B Trujillo, Alona Muzikansky, Rebecca A Betensky, Bradley T Hyman, Brian J Bacskai
BACKGROUND: Amyloid-β oligomers (oAβ) are thought to mediate neurotoxicity in Alzheimer's disease (AD), and previous studies in AD transgenic mice suggest that calcium dysregulation may contribute to these pathological effects. Even though AD mouse models remain a valuable resource to investigate amyloid neurotoxicity, the concomitant presence of soluble Aβ species, fibrillar Aβ, and fragments of amyloid precursor protein (APP) complicate the interpretation of the phenotypes. METHOD: To explore the specific contribution of soluble oligomeric Aβ (oAβ) to calcium dyshomeostasis and synaptic morphological changes, we acutely exposed the healthy mouse brain, at 3 to 6 months of age, to naturally occurring soluble oligomers and investigated their effect on calcium levels using in vivo multiphoton imaging...
March 21, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28323691/mri-may-serve-as-a-valid-alternative-to-standing-radiography-in-evaluating-the-sagittal-alignment-of-the-upper-thoracic-spine
#6
Fei Wang, Xu Sun, Saihu Mao, Zhen Liu, Jun Qiao, Feng Zhu, Zezhang Zhu, Tao Pan, Ling Chen, Qinghua Zhao, Yong Qiu
STUDY DESIGN: This study is of a retrospective radiographic design. OBJECTIVE: The objective of the study was to compare supine magnetic resonance images (MRI) with standing x-ray scanning in the evaluation of the sagittal alignment of the upper thoracic spine. SUMMARY OF BACKGROUND DATA: X-ray films have been reported to be inaccurate in evaluating the proximal thoracic sagittal alignment because of poor visibility of the upper thoracic region...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28321901/a-pneumatic-phantom-for-mimicking-respiration-induced-artifacts-in-spinal-mri
#7
Philippe De Tillieux, Ryan Topfer, Alexandru Foias, Iris Leroux, Imanne El Maâchi, Hugues Leblond, Nikola Stikov, Julien Cohen-Adad
PURPOSE: To design a phantom capable of mimicking human respiration to serve as a testing platform for correction of the static and time-evolving magnetic field distortions typically encountered in MRI of the spinal cord. METHODS: An inflation system to mimic the air variation of the human lungs was constructed. The inflation system was linked to a phantom containing synthetic lungs and an ex vivo human spine. The relationship between air pressure and phantom lung volume was evaluated via imaging experiment...
March 20, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28320364/the-weight-of-pupils-schoolbags-in-early-school-age-and-its-influence-on-body-posture
#8
Anna Brzęk, Tarja Dworrak, Markus Strauss, Fabian Sanchis-Gomar, Ibtissam Sabbah, Birgit Dworrak, Roman Leischik
BACKGROUND: Postural development progresses through a series of stages (growth spurts, development of balance and coordination, postural stability) which occur when children are at school age. The reduction in the level of physical activity, increased body weight, overloaded school bags, asymmetry of the backpack straps, the method of putting on and taking off the backpacks and increased usage of electronic devices have negative side effects such as bad body posture habits. METHODS: A prospective cohort study in the group of 155 pupils at early school age 7-9 years old has been conducted...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28319550/continuous-transversus-abdominis-plane-nerve-blocks-does-varying-local-anesthetic-delivery-method-automatic-repeated-bolus-versus-continuous-basal-infusion-influence-the-extent-of-sensation-to-cold-a-randomized-triple-masked-crossover-study-in-volunteers
#9
Bahareh Khatibi, Engy T Said, Jacklynn F Sztain, Amanda M Monahan, Rodney A Gabriel, Timothy J Furnish, Johnathan T Tran, Michael C Donohue, Brian M Ilfeld
BACKGROUND: It remains unknown whether continuous or scheduled intermittent bolus local anesthetic administration is preferable for transversus abdominis plane (TAP) catheters. We therefore tested the hypothesis that when using TAP catheters, providing local anesthetic in repeated bolus doses increases the cephalad-caudad cutaneous effects compared with a basal-only infusion. METHODS: Bilateral TAP catheters (posterior approach) were inserted in 24 healthy volunteers followed by ropivacaine 2 mg/mL administration for a total of 6 hours...
April 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28306517/biomechanical-analysis-of-stiffness-and-fracture-displacement-after-using-pmma-augmented-sacroiliac-screw-fixation-for-sacrum-fractures
#10
Andreas Höch, Richard Schimpf, Niels Hammer, Stefan Schleifenbaum, Michael Werner, Christoph Josten, Jörg Böhme
Cement augmentation of pedicle screws is the gold standard for the stabilization of osteoporotic fractures of the spine. In-screw cement augmentation, in which cement is injected through the cannula, is another option for fracture stabilization of fragility fractures of the sacrum. However, biomechanical superiority of this technique compared to conventional sacroiliac screw fixation has not been tested. The present study compares the stability of cement-augmented and non-cement-augmented sacroiliac screw fixation in osteoporotic sacrum fractures under cyclic loading...
March 15, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28303708/the-assessment-of-the-ionizing-radiation-dose-received-by-patients-during-some-diagnostic-x-ray-examinations-carried-out-on-the-basis-of-the-working-procedures-in-the-health-care-entities
#11
Marcin Bekas, Elżbieta Waśniewska, Adam Wardziński, Kamil Wieprzowski
Background: X-ray examination is a popular and universally used injury and disease diagnostic method. A distinctive X ray examination feature is that it can be done quickly which is extremely important in case of the need for rapid diagnosis of patients in life threatening condition. Another advantage of the X-ray examinations is also relatively low cost of carry. However, X-ray examination involve adverse health effects. During the examination the patient is subjected to ionizing radiation that might have impact on his health...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28300467/association-of-cyp1a1-and-cyp1b1-polymorphisms-with-bone-mineral-density-variations-in-postmenopausal-mexican-mestizo-women
#12
Bertha Chávez, Felipe Vilchis, David Rojano-Mejía, Ramón Mauricio Coral Vázquez, María Del Carmen Aguirre-García, Patricia Canto
Herein, we investigated potential associations between polymorphisms of genes related to estrogen metabolism and bone mineral density (BMD) in postmenopausal women. This was a cross-sectional study, in which two hundred and ninety postmenopausal Mexican-Mestizo women were studied. The BMD of the lumbar spine (LS), total hip (TH), and femoral neck (FN) was measured. The distribution of the genetic polymorphisms, including rs1799814 and rs1048943 at CYP1A1 as well as rs1056836 at CYP1B1, were analyzed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), single-stranded conformational polymorphism (SSCP), and DNA sequencing...
March 16, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28299782/a-test-of-a-skeletal-ageing-method-based-on-resorption-of-the-alveolar-crest-following-tooth-loss-using-a-skeletal-population-of-documented-age-at-death
#13
Simon Mays
OBJECTIVES: Resorption of the alveolar process occurs following tooth loss, and appears to continue for a prolonged period. Previous study (Mays, ) with a known-age collection of human remains suggested the potential of this phenomenon for age estimation in remains of adults who have lost one or more molar teeth. This article tests this ageing technique on another known age group, and attempts to evaluate the impact of some extraneous factors on the method. MATERIALS AND METHODS: The study group comprises adult skeletons (N = 110) of documented age at death from 18th to 19th century London...
March 16, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28296814/pedicle-screw-safety-how-much-anterior-breach-is-safe-a-cadaveric-and-ct-based-study
#14
Vishal Sarwahi, Monica Payares, Rachel Gecelter, Stephen Wendolowski, Kathleen Maguire, Dan Wang, Beverly Thornhill, Terry Amaral
STUDY DESIGN: Clinical retrospective chart review and basic science study OBJECTIVES.: To determine the safety limits of an anterior/anterorolateral misplaced pedicle screw on CT scan in spinal deformity. SUMMARY OF BACKGROUND DATA: While the limits of medial breaches (<4 mm) are known, the safe limits for anterior/anterolateral breaches in spine deformity are not yet defined. METHODS: This study had two parts. In part I, post-operative CT scans of 165 patients operated on for spine deformity were reviewed for screw misplacement (2800 screws)...
March 14, 2017: Spine
https://www.readbyqxmd.com/read/28291406/validation-of-the-baseline-severity-stratification-of-objective-functional-impairment-in-lumbar-degenerative-disc-disease
#15
Martin N Stienen, Nicolas R Smoll, Holger Joswig, Marco V Corniola, Karl Schaller, Gerhard Hildebrandt, Oliver P Gautschi
OBJECTIVE The Timed Up and Go (TUG) test is a simple, objective, and standardized method to measure objective functional impairment (OFI) in patients with lumbar degenerative disc disease (DDD). The objective of the current work was to validate the OFI baseline severity stratification (BSS; with levels of "none," "mild," "moderate," and "severe"). METHODS Data were collected in a prospective IRB-approved 2-center study. Patients were assessed with a comprehensive panel of scales for measuring pain (visual analog scale [VAS] for back and leg pain), functional impairment (Roland-Morris Disability Index [RMDI] and Oswestry Disability Index [ODI]), and health-related quality of life (HRQOL; EQ-5D and SF-12)...
March 3, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28288920/early-patient-reported-outcomes-predict-3-year-outcomes-in-operatively-treated-patients-with-adult-spinal-deformity
#16
Amit Jain, Khaled M Kebaish, Daniel M Sciubba, Hamid Hassanzadeh, Justin K Scheer, Brian J Neuman, Virginie Lafage, Shay Bess, Themistocles S Protopsaltis, Douglas C Burton, Justin S Smith, Christopher I Shaffrey, Richard A Hostin, Christopher P Ames
BACKGROUND: For patients with adult spinal deformity (ASD), surgical treatment may improve their health-related quality of life. This study investigates when the greatest improvement in outcomes occurs and whether incremental improvements in patient-reported outcomes during the first postoperative year predict outcomes at 3 years. METHODS: Using a multicenter registry, we identified 84 adults with ASD treated surgically from 2008 through 2012 with complete 3-year follow-up...
March 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28285470/the-effect-of-a-muscle-weight-bearing-and-aerobic-exercise-program-on-the-body-composition-muscular-strength-biochemical-markers-and-bone-mass-of-obese-patients-who-have-undergone-gastric-bypass-surgery
#17
Luciana Campanha-Versiani, Danielle Aparecida Gomes Pereira, Giane Amorim Ribeiro-Samora, Adauto Versiani Ramos, Maria Fatima H de Sander Diniz, Luiz Armando De Marco, Maria Marta Sarquis Soares
BACKGROUND: The effect of an exercise program on the body composition, muscular strength (MS), biochemical markers, and bone mineral density (BMD) of individuals undergoing gastric bypass is unclear. We assessed lean mass (LM), MS, bone remodeling markers, and BMD before and after supervised weight-bearing and aerobic exercise training in obese patients who underwent Roux-en-Y gastric bypass (RYGB). METHODS: This study included 37 obese patients (81.1% women, mean age 38...
March 11, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28283082/effects-of-the-rider-on-the-kinematics-of-the-equine-spine-under-the-saddle-during-the-trot-using-inertial-measurement-units-methodological-study-and-preliminary-results
#18
P Martin, L Cheze, P Pourcelot, L Desquilbet, L Duray, H Chateau
Many factors associated with the saddle and the rider could produce pain in horses thus reducing performance. However, studies of horse-saddle-rider interactions are limited and determining their effects remains challenging. The aim of this study was to test a novel method for assessing equine thoracic and lumbar spinal movement under the saddle and collect data during trotting. Back movement was measured using inertial measurement units (n = 5) fixed at the levels of thoracic vertebrae T6, T12 and T16, and lumbar vertebrae L2 and L5...
March 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28282756/the-effect-of-short-term-isometric-training-on-core-torso-stiffness
#19
Benjamin Lee, Stuart McGill
"Core" exercise is a basic part of many physical training regimens with goals ranging from rehabilitation of spine and knee injuries to improving athletic performance. Core stiffness has been proposed to perform several functions including reducing pain by minimising joint micro-movements, and enhancing strength and speed performance. This study probes the links between a training approach and immediate but temporary changes in stiffness. Passive and active stiffness was measured on 24 participants; 12 having little to no experience in core training (inexperienced), and the other 12 being athletes experienced to core training methods; before and after a 15 min bout of isometric core exercises...
September 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28279660/validity-of-the-instrumented-push-and-release-test-to-quantify-postural-responses-in-persons-with-multiple-sclerosis
#20
Mahmoud El-Gohary, Daniel Peterson, Geetanjali Gera, Fay B Horak, Jessie M Huisinga
OBJECTIVE: To test the validity of wearable inertial sensors to provide objective measures of postural stepping responses to the Push and Release clinical test in people with multiple sclerosis DESIGN: Cross-sectional SETTING: University medical center balance disorders laboratory PARTICIPANTS: 52 PwMS and 21 age-matched healthy controls MAIN OUTCOME MEASURES: stepping latency, time and number of steps required to reach stability, and initial step length were calculated from three inertial measurement units placed on participants' lumbar spine and feet...
March 6, 2017: Archives of Physical Medicine and Rehabilitation
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