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https://www.readbyqxmd.com/read/27913354/a-novel-elastic-force-field-to-influence-mediolateral-foot-placement-during-walking
#1
Elizabeth Nyberg, Jordan Broadway, Christian Finetto, Jesse Dean
Bipedal gait can be stabilized through mechanically-appropriate mediolateral foot placement, although this strategy is disrupted in a subset of neurologically injured individuals with balance deficits. The goal of the present work was to develop a device to influence mediolateral foot placement during treadmill walking. We created a novel force-field using a combination of passive elasticity and active control; wires in series with extension springs run parallel to the treadmill belts and can be rapidly repositioned to exert mediolateral forces on the legs of users...
December 1, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27912075/is-cone-beam-computed-tomography-always-necessary-for-dental-implant-placement
#2
George Deeb, Ludmils Antonos, Samuel Tack, Caroline Carrico, Daniel Laskin, Janina Golob Deeb
PURPOSE: The use of cone-beam computed tomography (CBCT) for evaluation of patients for dental implants has gained considerable popularity. This retrospective cohort study was designed to determine whether using a clinical examination and a panoramic radiograph (Panorex) for implant selection and determining the need for bone grafting would be comparable to using CBCT in routine implant cases. PATIENTS AND METHODS: Implant size and need for bone grafting were initially determined in 82 patients using a panoramic radiograph and clinical examination...
November 15, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27911394/confirmation-of-myocardial-ischemia-and-reperfusion-injury-in-mice-using-surface-pad-electrocardiography
#3
Stephanie L C Scofield, Krishna Singh
Many animal models have been established for the study of myocardial remodeling and heart failure due to its status as the number one cause of mortality worldwide. In humans, a pathologic occlusion forms in a coronary artery and reperfusion of that occluded artery is considered essential to maintain viability of the myocardium at risk. Although essential for myocardial recovery, reperfusion of the ischemic myocardium creates its own tissue injury. The physiologic response and healing of an ischemia/reperfusion injury is different from a chronic occlusion injury...
November 24, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27911025/effect-of-balloon-expandable-transcatheter-aortic-valve-replacement-positioning-a-patient-specific-numerical-model
#4
Matteo Bianchi, Gil Marom, Ram P Ghosh, Harold A Fernandez, James R Taylor, Marvin J Slepian, Danny Bluestein
Transcatheter aortic valve replacement (TAVR) has emerged as a life-saving and effective alternative to surgical valve replacement in high-risk, elderly patients with severe calcific aortic stenosis. Despite its early promise, certain limitations and adverse events, such as suboptimal placement and valve migration, have been reported. In the present study, it was aimed to evaluate the effect of various TAVR deployment locations on the procedural outcome by assessing the risk for valve migration. The deployment of a balloon-expandable Edwards SAPIEN valve was simulated via finite element analysis in a patient-specific calcified aortic root, which was reconstructed from CT scans of a retrospective case of valve migration...
December 2016: Artificial Organs
https://www.readbyqxmd.com/read/27909659/reliability-of-the-planned-pedicle-screw-trajectory-versus-the-actual-pedicle-screw-trajectory-using-intra-operative-3d-ct-and-image-guidance
#5
Catherine A Miller, Charles G Ledonio, Matthew A Hunt, Farhan Siddiq, David W Polly
BACKGROUND: Technological advances, including navigation, have been made to improve safety and accuracy of pedicle screw fixation. We evaluated the accuracy of the virtual screw placement (Stealth projection) compared to actual screw placement (intra-operative O-Arm) and examined for differences based on the distance from the reference frame. METHODS: A retrospective evaluation of prospectively collected data was conducted from January 2013 to September 2013. We evaluated thoracic and lumbosacral pedicle screws placed using intraoperative O-arm and Stealth navigation by obtaining virtual screw projections and intraoperative O-arm images after screw placement...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27909362/examining-the-need-for-a-new-instrument-to-evaluate-canadian-physiotherapy-students-during-clinical-education-experiences
#6
Mark Hall, Patricia Manns, Cheryl Poth, Lauren Beaupre
Purpose: To gauge the need for a new assessment instrument for Canadian physiotherapy students on clinical placements. Methods: A national survey was developed and distributed to 18,110 Canadian physiotherapists. Results: A total of 3,148 physiotherapists from diverse practice settings responded to the survey. Of those who indicated that student evaluation was applicable to them (n=2,393), 70% stated that a new instrument was needed; of these, 78% felt that the new instrument should be based on Canadian practice standards and rated with an anchored visual analogue scale, and 73% said they would be comfortable completing the instrument online...
2016: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/27909361/an-exploration-of-canadian-physiotherapists-decisions-about-whether-to-supervise-physiotherapy-students-results-from-a-national-survey
#7
Mark Hall, Cheryl Poth, Patricia Manns, Lauren Beaupre
Purpose: To explore Canadian physiotherapists' perceptions of the factors that influence their decisions whether to supervise students in clinical placements. Methods: Using accepted survey development methodology, a survey was developed and administered to 18,110 physiotherapists to identify which factors contribute to the decision to supervise students. The survey also gave respondents opportunities to provide comments; these were analyzed via directed content analysis, using the factors identified in an exploratory factor analysis as an organizing structure...
2016: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/27908166/improved-targeting-accuracy-of-lung-tumor-biopsies-with-scanning-beam-digital-x-ray-tomosynthesis-image-guidance
#8
Geoff Nelson, Meng Wu, Cameron Hinkel, Ganesh Krishna, Tobias Funk, Jarrett Rosenberg, Rebecca Fahrig
PURPOSE: Electromagnetic navigation bronchoscopy (ENB) provides improved targeting accuracy during transbronchial biopsies of suspicious nodules. The greatest weakness of ENB-based guidance is the registration divergence that exists between the planning CT, acquired days or weeks before the intervention, and the patient on the table on the day of the intervention. Augmenting ENB guidance with real-time tomosynthesis imaging during the intervention could mitigate the divergence and further improve the yield of ENB-guided transbronchial biopsies...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27906939/a-new-radiofrequency-ablation-procedure-to-treat-sacroiliac-joint-pain
#9
Jianguo Cheng, See Loong Chen, Nicole Zimmerman, Jarrod E Dalton, Garret LaSalle, Richard Rosenquist
BACKGROUND: Low back pain may arise from disorders of the sacroiliac joint in up to 30% of patients. Radiofrequency ablation (RFA) of the nerves innervating the sacroiliac joint has been shown to be a safe and efficacious strategy. OBJECTIVES: We aimed to develop a new RFA technique to relieve low back pain secondary to sacroiliac joint disorders. STUDY DESIGN: Methodology development with validation through prospective observational non-randomized trial (PONRT)...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27906938/technical-strategies-and-anatomic-considerations-for-an-extrapedicular-modified-inferior-endplate-access-to-thoracic-and-lumbar-vertebral-bodies
#10
Douglas P Beall, Blake Parsons, Scott Burner
BACKGROUND: Percutaneous access to the vertebral bodies is commonly done via the transpedicular approach for both diagnoses and treatment of spinal pathology. While this approach is effective in most cases, it is difficult in certain situations such as a patient with obstructing hardware from prior surgery. OBJECTIVES: To investigate and illustrate an alternative to the typical percutaneous access to the vertebral body via an extrapedicular approach and to determine the complications associated with this approach...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27905932/adaptation-and-validation-of-the-instrument-clinical-learning-environment-and-supervision-for-medical-students-in-primary-health-care
#11
Eva Öhman, Hassan Alinaghizadeh, Päivi Kaila, Håkan Hult, Gunnar H Nilsson, Helena Salminen
BACKGROUND: Clinical learning takes place in complex socio-cultural environments that are workplaces for the staff and learning places for the students. In the clinical context, the students learn by active participation and in interaction with the rest of the community at the workplace. Clinical learning occurs outside the university, therefore is it important for both the university and the student that the student is given opportunities to evaluate the clinical placements with an instrument that allows evaluation from many perspectives...
December 1, 2016: BMC Medical Education
https://www.readbyqxmd.com/read/27904980/a-resolved-two-way-coupled-cfd-6-dof-approach-for-predicting-embolus-transport-and-the-embolus-trapping-efficiency-of-ivc-filters
#12
Kenneth I Aycock, Robert L Campbell, Keefe B Manning, Brent A Craven
Inferior vena cava (IVC) filters are medical devices designed to provide a mechanical barrier to the passage of emboli from the deep veins of the legs to the heart and lungs. Despite decades of development and clinical use, IVC filters still fail to prevent the passage of all hazardous emboli. The objective of this study is to (1) develop a resolved two-way computational model of embolus transport, (2) provide verification and validation evidence for the model, and (3) demonstrate the ability of the model to predict the embolus-trapping efficiency of an IVC filter...
November 30, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27904858/interventional-therapy-of-esophageal-cancer
#13
REVIEW
Aiwu Mao
Esophageal cancer (EC) is the fourth leading cause of cancer death in China. Despite a lot of advances in diagnosis and therapy, the survival rate of patients with EC is low. There is urgent need for a variety of methods and techniques to improve the survival time and alleviate the lesions of EC. Nowadays, alternative and less invasive approaches to the treatment of ECs are being identified. Here, we review several main interventional methods at different stages of EC, including endoscopic resection, stent placement, arterial infusion, photodynamic therapy, and radiofrequency ablation...
October 2016: Gastrointestinal Tumors
https://www.readbyqxmd.com/read/27904252/hemobilia
#14
REVIEW
Rakesh Navuluri
Hemobilia is a rare source of upper gastrointestinal bleeding, though the incidence is increasing along with the rise in minimally invasive biliary interventions. Prompt diagnosis and treatment rests on having appropriate clinical suspicion which should be based on the patient's presenting signs and symptoms, as well as history including recent instrumentation. Endoscopy should be reserved for cases of upper gastrointestinal bleeding with low suspicion for hemobilia. Interventional radiology may be the first-line diagnostic and therapeutic option for patients with a high suspicion of hemobilia...
December 2016: Seminars in Interventional Radiology
https://www.readbyqxmd.com/read/27904222/functional-and-computed-tomography-correlation-of-femoral-and-tibial-tunnels-in-single-bundle-anterior-cruciate-ligament-reconstruction-use-of-accessory-anteromedial-portal
#15
Naveen Joseph Mathai, Rajkumar S Amaravathi, K V Pavan, Padmanabhan Sekaran, Gaurav Sharma, Belliappa Codanda
BACKGROUND: An accessory anteromedial portal (AAMP) has been shown to be effective in placing an anatomically ideal femoral tunnel. It is well known that this is due to the independent femoral drilling which is possible with the AAMP. However very little is known regarding the significance of this reconstruction technique in influencing the functional outcomes of anatomic anterior cruciate ligament reconstruction (ACLR). This study documents the influence of tibial and femoral tunnel positions on functional outcomes of anatomic ACLR using the AAMP...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904214/results-of-neurolysis-in-established-upper-limb-volkmann-s-ischemic-contracture
#16
Dinesh K Meena, Srikiran Thalanki, Poornima Patni, Ram Khiladi Meena, Dinesh Bairawa, Chirag Bhatia
BACKGROUND: Treatment of established cases of Volkmann's ischemic contracture (VIC) of upper limb is very tedious. Since the period of Volkmann, various experimental works are being performed for its treatment, but none are effective. Disabilities from nerve palsy and hand muscle paralysis are more problematic than any other deformity in VIC. To solve these problems, we conducted a study to see the result of neurolysis of median and ulnar nerve and their subcutaneous placement in established cases of VIC...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904211/post-operative-pain-management-in-shoulder-surgery-suprascapular-and-axillary-nerve-block-by-arthroscope-assisted-catheter-placement
#17
H Çağdaş Basat, D Hakan Uçar, Mehmet Armangil, Berk Güçlü, Mehmet Demirtaş
BACKGROUND: Postoperative pain management is the part of shoulder surgery to improve patient satisfaction, start rehabilitation process rapidly and decrease for hospital stay. Various treatment modalities have been used for pain management, but they have some limitations, side effects and risks. Throughout intraoperative and postoperative period, nerve blocks have been used more popularly than others because of efficacy. For the regional nerve block, local anesthetic should be infiltrated close to the nerve for maximum effect...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27903478/the-clinical-efficacy-of-balloon-assisted-maturation-of-autogenous-arteriovenous-fistulae
#18
Syed Ali Rizvi, Fred Usoh, Anil Hingorani, Eleanor Iadgarova, Pamela Boniscavage, Justin Eisenberg, Enrico Ascher, Natalie Marks
OBJECTIVE: Delayed maturation of arteriovenous fistulae (AVF) among patients who require hemodialysis (HD) can lead to catheter sepsis with its resultant morbidity and mortality. Some have proposed that sequential balloon-assisted maturation (BAM) may accelerate the maturation times of these accesses. On the other hand, serial balloon angioplasty of normal vein may result in stenosis and delay maturation. Although the safety of BAM has been shown, direct comparison to non-matured AVF has not been explored...
November 26, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27903114/a-quantitative-analysis-of-craniopharyngioma-cyst-expansion-during-and-after-radiation-therapy-and-surgical-implications
#19
Kelly Lamiman, Kenneth K Wong, Benita Tamrazi, Jason D Nosrati, Arthur Olch, Eric L Chang, Erin N Kiehna
OBJECTIVE When complete resection of craniopharyngioma is not achievable or the sequelae are prohibitive, limited surgery and radiation therapy have demonstrated excellent local disease control while minimizing treatment-related sequelae. When residual tissue exists, there is a propensity for further cyst development and expansion during and after radiation therapy. This can result in obstructive hydrocephalus, visual changes, and/or clinical decline. The authors present a quantitative analysis of cyst expansion during and after radiotherapy and examine how it affected subsequent management...
December 2016: Neurosurgical Focus
https://www.readbyqxmd.com/read/27901387/quantification-and-characterization-of-pleural-fluid-in-healthy-dogs-with-thoracostomy-tubes
#20
Germaine C Hung, M Casey Gaunt, Joseph E Rubin, Gregory S Starrak, Sherisse A Sakals
OBJECTIVE To quantify and characterize pleural fluid collected from healthy dogs after placement of a thoracostomy tube (TT). ANIMALS 8 healthy Coonhound-cross dogs (mean ± SD weight, 27.2 ± 1.6 kg). PROCEDURES Thoracic CT of each dog was performed before placement of a TT and daily thereafter for 7 days. Thoracic fluid volume was calculated from CT images. Effusion was aspirated when detected; volume was recorded, and cytologic analysis and bacterial culture were performed. RESULTS Mean ± SD volume of pleural effusion detected by CT was 1...
December 2016: American Journal of Veterinary Research
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