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https://www.readbyqxmd.com/read/29234883/accuracy-of-thoracic-pedicle-screw-placement-in-adolescent-patients-with-severe-spinal-deformities-a-retrospective-study-comparing-drill-guide-template-with-free-hand-technique
#1
Yue Pan, G H Lü, Lei Kuang, Bing Wang
PURPOSE: Patients with severe spinal deformities often have small pedicle diameters, and pedicle dimensions vary between segments and individuals. Free-hand pedicle screw placement can be inaccurate. Individualized drill guide templates may be used, but the accuracy of pedicle screw placement in severe scoliosis remains unknown. The accuracy of drill guide templates and free-hand technique for the treatment of adolescent patients with severe idiopathic scoliosis are compared in this study...
December 12, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29233245/occupational-specific-strength-predicts-astronaut-related-task-performance-in-a-weighted-suit
#2
Andrew Taylor, Christopher J Kotarsky, Colin W Bond, Kyle J Hackney
BACKGROUND: Future space missions beyond low Earth orbit will require deconditioned astronauts to perform occupationally relevant tasks within a planetary spacesuit. The prediction of time-to-completion (TTC) of astronaut tasks will be critical for crew safety, autonomous operations, and mission success. This exploratory study determined if the addition of task-specific strength testing to current standard lower body testing would enhance the prediction of TTC in a 1-G test battery. METHODS: Eight healthy participants completed NASA lower body strength tests, occupationally specific strength tests, and performed six task simulations (hand drilling, construction wrenching, incline walking, collecting weighted samples, and dragging an unresponsive crewmember to safety) in a 48-kg weighted suit...
January 1, 2018: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29231075/sea-trial-verification-of-ultrasonic-antifouling-control
#3
Ji-Soo Park, Jeung-Hoon Lee
An ultrasonic antifouling treatment was applied to a 96,000 m3 class drill-ship to verify its feasibility through a sea-trial. Soon after the hull cleaning had been performed, six ultrasonic projectors were evenly deployed around the starboard shell plate. Driven by a 23 kHz sinusoidal ultrasound in an intermittent manner, the projectors emitted a high-intensity sound reaching 214 dB at the source level causing cavitation around the adjacent water and eventually deterring the settlement of marine fouling organisms...
December 12, 2017: Biofouling
https://www.readbyqxmd.com/read/29230932/a-multi-modality-tracking-navigation-and-calibration-for-a-flexible-robotic-drill-system-for-total-hip-arthroplasty
#4
Ahmad Nazmi Bin Ahmad Fuad, Kamal Deep, Wei Yao
BACKGROUND: This paper presents a novel multi-modality tracking and navigation system that provides a unique capability to guild a flexible drill tip inside the bone with accurate curved tunnelling. METHODS: As the flexible drill tip cannot be tracked optically inside the bone, this research focuses on developing a hybrid tracking and navigation system for tracking a flexible drill tip by using both optical and kinematic tracking. The tracking information is used to guide the THA (total hip arthroplasty) procedure, providing a real-time virtual model of the flexible drill...
December 12, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29230595/an-optimized-technique-of-endoscopic-third-ventriculocisternostomy-etv-for-children-with-occlusive-hydrocephalus
#5
Albert Akramovich Sufianov, Ekkehard M Kasper, Rinat Albertovich Sufianov
In this article, we present an optimized minimally invasive technique of ETV for children with occlusive hydrocephalus. The study comprises of 64 consecutive pediatric cases (34 boys and 30 girls aged from 1 month to 5 years) of occlusive hydrocephalus from various etiologies, which were treated with a modified technique of ETV. Mean clinical follow-up period after ETV was 24.2 ± 3.8 months. Application of the new technique made it possible to significantly reduce the length of the soft tissue incision for access, and the use of upgraded instruments allowed to perform a twist drill hole in the skull to less than half a usual size...
December 11, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/29229343/heat-generation-during-bony-decompression-of-lumbar-spinal-stenosis-using-high-speed-diamond-drill-with-or-without-automated-irrigation-and-ultrasonic-bone-cutting-knife
#6
Marc Matthes, Dirk Thomas Pillich, Ehab El Refaee, Henry W S Schroeder, Jan-Uwe Müller
OBJECTIVE: The main objective of the present prospective randomized single-blinded controlled study was to measure heat during bony decompression of lumbar spinal stenosis with high-speed drills, and ultrasonic bone cutting knife. METHODS: 90 patients diagnosed lumbar spinal stenosis were included in this study, and randomized for lumbar spinal canal decompression using either a high-speed drill with automatic irrigation (HSA), high-speed drill with manual irrigation (HSM), or an ultrasonic bone cutting knife with automatic irrigation (USBCD)...
December 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29227410/recurrent-lower-eyelid-ectropion-after-graft-surgery-using-autogenous-palmaris-longus-tendon
#7
Koji Komatsu, Hiromichi Matsuda, Yasuhiro Takahashi, Tadashi Nakano
A 78-year-old male experienced right lower eyelid ectropion following right facial trauma from a fall 5 years ago, for which he underwent autogenous palmaris longus tendon graft surgery at another clinic. Recurrence was noted 3 years after surgery. On first examination, there was outward turning of the lateral half of the right lower eyelid margin. We performed a lateral tarsal strip procedure with removal of the graft. Intraoperatively, the lateral part of the graft was located along the inferior tarsal border, whereas the medial part was located on the tarsal surface...
December 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29225648/evaluating-the-accuracy-of-two-microleakage-assessment-methods-for-mineral-trioxide-aggregate-and-calcium-enriched-mixture-cement
#8
Fatemeh Ayatollahi, Milad Hazeri Baqdad Abad, Seyed Hossein Razavi, Mahdi Tabrizizadeh, Reza Ayatollahi, Fatemeh Zarebidoki
Introduction: Multiple methods for evaluating microleakage have been introduced over the years, but there has been no agreement as to which technique will give more accurate results. The aim of this study was to compare the accuracy and results of fluid filtration and marginal adaptation methods for mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement apical plugs. Methods and Materials: A total of 250 single-rooted human teeth were collected...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29220760/historical-trace-element-accumulation-in-marine-sediments-from-the-tamaulipas-shelf-gulf-of-mexico-an-assessment-of-natural-vs-anthropogenic-inputs
#9
Omar Celis-Hernandez, Leticia Rosales-Hoz, Andrew B Cundy, Arturo Carranza-Edwards, Ian W Croudace, Hector Hernandez-Hernandez
The Gulf of Mexico is considered one of the world's major marine ecosystems, supporting important fisheries and habitats such as barrier islands, mangrove forests, seagrass beds, coral reefs etc. It also hosts a range of complex offshore petroleum exploration, extraction, and refining industries, which may have chronic or acute impacts on ecosystem functioning. Previous work on the marine effects of this activity is geographically incomplete, and has tended to focus on direct hydrocarbon impacts, while impacts from other related contaminants (e...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29218391/ct-guided-percutaneous-biopsy-of-sclerotic-bone-lesions-diagnostic-outcomes
#10
I-Yuan Joseph Chang, Hakan Ilaslan, Murali Sundaram, Jean Schils, Naveen Subhas
OBJECTIVE: To determine the diagnostic yield of CT-guided percutaneous biopsy of densely sclerotic bone lesions. MATERIALS AND METHODS: We retrospectively analyzed CT-guided percutaneous bone biopsies performed at our institution from September 2008 through August 2011 (329 cases) and from September 2012 through August 2015 (324 cases) after adoption of a battery-powered drill system (OnControl). Bone lesions were included in the analysis if they were >70% sclerotic by visual inspection, had a density > 2 times that of adjacent trabecular bone, and had an attenuation of ≥250 HU...
December 7, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29216764/quantifying-the-center-of-elbow-rotation-implications-for-medial-collateral-ligament-reconstruction
#11
Kraig S Graham, Sara Golla, Sebastian V Gehrmann, Robert A Kaufmann
BACKGROUND: Medial collateral ligament (MCL) reconstruction of the elbow mandates precise characterization of where the centerline of elbow rotation projects onto the medial epicondyle (ME). A muscle-splitting approach allows the flexor-pronator muscles to remain attached to the ME and facilitates visualization of the MCL remnant, the sublime tubercle, and the ulnohumeral joint line. Knowledge of where the centerline of rotation intersects the ME relative to the ulnohumeral joint line may assist the surgeon during placement of the proximal drill hole...
December 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29211429/training-together-interdisciplinary-mci-drill-prepares-paramedic-and-nursing-students-for-safe-effective-care
#12
William J Leggio, Rachael Greenheck, Andrew Rappolt
No abstract text is available yet for this article.
March 2017: JEMS: a Journal of Emergency Medical Services
https://www.readbyqxmd.com/read/29210210/value-of-double-mucoperiosteal-flaps-to-prevent-restenosis-in-draf-iib-iii-first-clinical-report
#13
Nadim Khoueir, Benjamin Verillaud, Paolo Castelnuovo, Philippe Herman
Exposed drilled bone in Draf IIb and III procedures promotes restenosis by inducing osteitis and neo-osteogenesis. This reaction can be avoided by covering bone with local mucoperiosteal flap that optimize the healing process In a series of 16 patients, a septoturbinal flap (STF) and lateral based nasoseptal flap (LNSF) are harvested to cover the posterior and anterior edge of the frontal cavity, respectively. These flaps do not overlap and can be harvested from the same side. Clinical feasibility of double mucoperiosteal flaps in Draf IIb and III was demonstrated with promising results in terms of frontal cavity restenosis prevention (93...
December 6, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29209943/mapping-toxic-mineral-contamination-the-southern-oyster-drill-s-haemastoma-l-1767-as-evaluable-sentinel-species
#14
Giuseppa Di Bella, Gianluca Pizzullo, Giuseppe Daniel Bua, Angela Giorgia Potortì, Antonello Santini, Salvatore Giacobbe
The nickel, chromium, arsenic, cadmium, and lead content have been evaluated, by ICP-MS, in digestive gland of the amphiatlantic gastropod Stramonita haemastoma, sampled along the highly anthropized Gulf of Milazzo (Central Mediterranean). Concentrations notably higher than those reported in literature for other Mediterranean Muricidae have been recorded. The results also indicated a different impact in different sites, according to distribution and typology of human activities, whilst recorded seasonal variations might relate with rapid metabolic response...
December 6, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29208213/evaluation-of-ex-vivo-restoration-of-carious-equine-maxillary-cheek-teeth-infundibulae-following-debridement-with-dental-drills-and-hedstrom-files
#15
A Horbal, R J M Reardon, T Liuti, P M Dixon
An ex-vivo study was performed on vertically mounted equine maxillary cheek teeth that had caries of 30 infundibulae, using high and low speed contra-angle dental drills and Hedstrom files to debride infundibular food debris and carious dental tissues. This technique effectively debrided 27/30 infundibulae with a mean depth of 19mm (range 9.4-34.3mm) as assessed by computed tomographic (CT) imaging. The debrided infundibulae were treated with sodium hypochlorite, EDTA and a bonding agent, and then then filled in layers with endodontic restoration materials...
December 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29208201/-osteochondritis-dissecans
#16
Per Gorm Jørgensen, Per Hölmich
Osteochondritis dissecans (OCD) has been known for more than 100 years. Several reasons have been suggested as the major cause for developing OCD: trauma/microtrauma, ischaemic or genetic reasons. OCD is primarily located in the knee. In adolescent patients with knee symptoms, X-ray of the affected knee and often a subsequent MRI scan is indicated. Depending on the findings, an arthroscopy can be performed. Conservative treatment can be quiet regime or bracing. Operative treatment can be transchondral/retrograde drilling for the in situ lesion or fixation of the unstable lesion...
November 27, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/29207334/peptidenavigator-an-interactive-tool-for-exploring-large-and-complex-data-sets-generated-during-peptide-based-drug-design-projects
#17
Kyle I Diller, Alexander S Bayden, Joseph Audie, David J Diller
There is growing interest in peptide-based drug design and discovery. Due to their relatively large size, polymeric nature, and chemical complexity, the design of peptide-based drugs presents an interesting "big data" challenge. Here, we describe an interactive computational environment, PeptideNavigator, for naturally exploring the tremendous amount of information generated during a peptide drug design project. The purpose of PeptideNavigator is the presentation of large and complex experimental and computational data sets, particularly 3D data, so as to enable multidisciplinary scientists to make optimal decisions during a peptide drug discovery project...
November 24, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29205169/potential-for-thermal-damage-to-the-blood-brain-barrier-during-craniotomy-procedure-implications-for-intracortical-recording-microelectrodes
#18
Andrew Shoffstall, Jennifer Paiz, David Miller, Griffin Rial, Mitchell Willis, Dhariyat Menendez, Stephen Hostler, Jeffrey R Capadona
Our objective was to determine how readily blood-brain barrier (BBB) disruption occurred as a result of bone drilling during a craniotomy to implant microelectrodes in rat cortex. While the phenomenon of heat production during bone-drilling is well-known, practices to evade damage to the underlying brain tissue are inconsistently practiced and reported in the literature. Approach: We conducted a review of intracortical microelectrode literature to summarize typical approaches to mitigate drill heating during rodent craniotomies...
December 5, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29204491/a-simple-technique-to-remove-well-fixed-acetabular-components-in-revision-of-total-hip-arthroplasty
#19
Xiaoqi Zhang, Fei Hu, Rui He, Xu Li, Xiaofeng Ji, Xifu Shang
Removing well-fixed acetabular components can be a challenge for orthopaedic surgeons in revision of total hip arthroplasty. Acetabular bone loss, fracture, and other complications occurred in extracting implants may result in instability and fail of revision. Thus, instruments are developed to avoid such complications. We report a simple technique by drilling a tunnel on the superolateral quadrant of acetabulum and using an offset staff to remove acetabular components without many matching units. The procedure of removing well-fixed acetabular components is a simple, efficient, inexpensive, bone stock preserving technique...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29204196/delineate-yet-not-dread-anomalous-vertebral-artery-in-pediatric-congenital-atlantoaxial-dislocation-and-basilar-invagination
#20
Pravin Salunke
Introduction: The deformed joints seen in congenital atlantoaxial dislocation (CAAD) are often associated with vascular anomalies. It is important to identify these vascular anomalies and address them appropriately without compromising the manipulation and fusion of C1-C2 joints. The small bones in pediatric age group pose an additional challenge. Materials and Methods: Data of fifty-six children with CAAD operated in the last 4 years was analyzed. A computed tomography angiogram was obtained preoperatively to assess for the course of the third segment of vertebral artery (VA)...
July 2017: Journal of Pediatric Neurosciences
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