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https://www.readbyqxmd.com/read/28927073/surgical-treatment-of-parapharyngeal-space-tumors-a-report-of-29-cases
#1
Kei Ijichi, Shingo Murakami
The present study aimed to establish a strategy for parapharyngeal space (PPS) tumor surgery based on preoperative symptoms, clinical signs, imaging and histological examination. A retrospective cohort study was conducted with 29 adult patients who underwent surgery for primary PPS tumors from 2008-2015. The following data was obtained: Preoperative symptoms of the patient, histological type of the tumor, surgical approach and complications. Of the 29 patients who underwent surgery to remove a PPS tumor, 16 presented with neurogenic tumors and 13 with salivary gland tumors...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926393/trends-in-the-treatment-of-single-and-multilevel-cervical-stenosis-a-review-of-the-american-board-of-orthopaedic-surgery-database
#2
Alfredo Arrojas, J Benjamin Jackson, Gregory Grabowski
BACKGROUND: In order to identify any changes in the utilization of new and old techniques, we investigated trends in the operative management of cervical stenosis by orthopaedic surgeons applying for board certification. METHODS: We queried the American Board of Orthopaedic Surgery database from 1998 to 2013 to identify all of the cervical spine procedures for stenosis that had been performed by candidates taking Part II of the licensing examination. Longitudinal trends were determined for the utilized approach, the individual procedures that had been performed, and whether a motion-preserving technique had been employed...
September 20, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28925963/on-the-role-of-processing-parameters-in-producing-recycled-aluminum-aa6061-based-metal-matrix-composite-mmc-alr-prepared-using-hot-press-forging-hpf-process
#3
Azlan Ahmad, Mohd Amri Lajis, Nur Kamilah Yusuf
Solid-state recycling, which involves the direct recycling of scrap metal into bulk material using severe plastic deformation, has emerged as a potential alternative to the conventional remelting and recycling techniques. Hot press forging has been identified as a sustainable direct recycling technique that has fewer steps and maintains excellent material performance. An experimental investigation was conducted to explore the hardness and density of a recycled aluminum-based metal matrix composite by varying operating temperature and holding time...
September 19, 2017: Materials
https://www.readbyqxmd.com/read/28925857/comparison-of-stored-red-blood-cell-washing-techniques-for-priming-extracorporeal-circuits
#4
Jun Sasaki, Christopher Tirotta, Hyunsoo Lim, Kathleen Kubes, Jane Salvaggio, Robert Hannan, Redmond Burke, Jorge Ojito
BACKGROUND: The aim of this study was to compare three different blood washing techniques and describe the differences for the composition of the washed red blood cells (RBC). METHODS: Stored RBCs less than 5 days old were washed using three different techniques. 1) Washing with normal saline with the COBE Model 2991 blood processor in the blood bank (BB-S). 2) Washing with normal saline with the Continuous AutoTransfusion System (C.A.T.S) in the operating room (OR-S)...
September 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28925817/using-multiple-classifiers-for-predicting-the-risk-of-endovascular-aortic-aneurysm-repair-re-intervention-through-hybrid-feature-selection
#5
Omneya Attallah, Alan Karthikesalingam, Peter Je Holt, Matthew M Thompson, Rob Sayers, Matthew J Bown, Eddie C Choke, Xianghong Ma
Feature selection is essential in medical area; however, its process becomes complicated with the presence of censoring which is the unique character of survival analysis. Most survival feature selection methods are based on Cox's proportional hazard model, though machine learning classifiers are preferred. They are less employed in survival analysis due to censoring which prevents them from directly being used to survival data. Among the few work that employed machine learning classifiers, partial logistic artificial neural network with auto-relevance determination is a well-known method that deals with censoring and perform feature selection for survival data...
September 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28925589/recurrent-twin-twin-transfusion-syndrome-rttts-and-twin-anemia-polycythemia-sequence-taps-after-fetoscopic-laser-surgery-fls-size-of-the-cannula-does-matter
#6
Roopali Donepudi, Joost Akkermans, Lovepreet Mann, Frans J Klumper, Johanna M Middeldorp, Enrico Lopriore, Kenneth J Moise, Michael Bebbington, Anthony Johnson, Dick Oepkes, Ramesha Papanna
OBJECTIVES: Optimal outcomes after fetoscopic laser surgery (FLS) for twin-twin transfusion (TTTS) depend on the successful completion of ablation of all placental anastomoses. Our objective was to determine the incidence and risk factors for the occurrence of recurrent TTTS (rTTTS) or twin anemia-polycythemia sequence (TAPS) after FLS, and focusing on the impact of different diameters of the cannula. METHODS: A secondary analysis of prospectively collected data of 666 consecutive patients undergoing laser surgery for TTTS from 2 centers was performed...
September 19, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28925512/suprafascial-dissection-of-the-pedicled-groin-flap-a-safe-and-practical-approach-to-flap-harvest
#7
Mohamed Abdelrahman, Jonathan Zelken, Ren-Wen Huang, Chung-Chen Hsu, Chih-Hung Lin, Yu-Te Lin, Cheng-Hung Lin
BACKGROUND: The groin flap has been relied upon for more than 4 decades and is well suited for reconstruction of the mutilated hand. Classic groin flap harvest is subfascial and includes the superficial circumflex iliac artery (SCIA). SCIA perforator flaps have shown that one perforator is sufficient to supply a large flap without breaching fascia. Accordingly, we routinely preserve the fascia and rely wholly on the superficial branch of the SCIA, sparing the deep branch. We aim to investigate the safety of suprafascial flap elevation and encourage a paradigm shift in reconstruction with groin flap transfer...
September 19, 2017: Microsurgery
https://www.readbyqxmd.com/read/28924596/double-endoscopic-bypass-for-gastric-outlet-obstruction-and-biliary-obstruction
#8
Olaya I Brewer Gutierrez, Jose Nieto, Shayan Irani, Theodore James, Renata Pieratti Bueno, Yen-I Chen, Majidah Bukhari, Omid Sanaei, Vivek Kumbhari, Vikesh K Singh, Saowanee Ngamruengphong, Todd H Baron, Mouen A Khashab
BACKGROUND AND STUDY AIMS:  Double endoscopic bypass entails EUS-guided gastroenterostomy (EUS-GE) and EUS-guided biliary drainage (EUS-BD) in patients who present with gastric outlet and biliary obstruction. We report a multicenter experience with double endoscopic bypass. PATIENTS AND METHODS:  Retrospective, multicenter series involving 3 US centers. Patients who underwent double endoscopic bypass for malignant gastric and biliary obstruction from 1/2015 to 12/2016 were included...
September 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28924524/retrospective-review-on-accuracy-a-pilot-study-of-robotically-guided-thoracolumbar-sacral-pedicle-screws-versus-fluoroscopy-guided-and-computerized-tomography-stealth-guided-screws
#9
Brian Fiani, Syed A Quadri, Vivek Ramakrishnan, Blake Berman, Yasir Khan, Javed Siddiqi
Introduction Pedicle screw insertion is the mainstay of thora-cic and lumbosacral posterior spinal instrumentation. However, it may be associated with complications such as screw mal-positioning. The purpose of this study was to develop a pilot study to compare the accuracy of robot-guided screw insertion versus hand-guided screw placement for spinal instrumentation. The hand-guided screws were placed with assistance from computerized tomography (CT) stealth guidance or fluoroscopy. Materials and methods A retrospective analysis of medical records was done for all patients that had pedicle screw insertion for instrumentation between the dates of December 2013 and January 2016 with post-screw placement CT imaging...
July 6, 2017: Curēus
https://www.readbyqxmd.com/read/28924322/hip-arthroscopy-minimally-invasive-surgery-for-hip-pathologies
#10
Munish Sood, Amresh Ghai
Arthroscopy is considered as one of the revolutionary techniques in the management of musculoskeletal disorders. Hip arthroscopy is a new emerging technique for the management of hip pathologies and it has gained popularity in the past decade. In the present case series, 5 patients with hip pathologies were operated using hip arthroscopy technique and the functional outcome and complications associated with hip arthroscopy were assessed. Harris hip score improved significantly at the latest follow-up. No major complication was noticed in our case series...
April 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28924261/a-chip-integrated-coherent-photonic-phononic-memory
#11
Moritz Merklein, Birgit Stiller, Khu Vu, Stephen J Madden, Benjamin J Eggleton
Controlling and manipulating quanta of coherent acoustic vibrations-phonons-in integrated circuits has recently drawn a lot of attention, since phonons can function as unique links between radiofrequency and optical signals, allow access to quantum regimes and offer advanced signal processing capabilities. Recent approaches based on optomechanical resonators have achieved impressive quality factors allowing for storage of optical signals. However, so far these techniques have been limited in bandwidth and are incompatible with multi-wavelength operation...
September 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28923645/comparison-of-segmental-versus-longitudinal-intravascular-ultrasound-analysis-for-pediatric-cardiac-allograft-vasculopathy
#12
M A Kuhn, M Burch, R E Chinnock, M J Fenton
Intravascular ultrasound (IVUS) has been routinely used in some centers to investigate cardiac allograft vasculopathy in pediatric heart transplant recipients. We present an alternative method using more sophisticated imaging software. This study presents a comparison of this method with an established standard method. All patients who had IVUS performed in 2014 were retrospectively evaluated. The standard technique consisted of analysis of 10 operator-selected segments along the vessel. Each study was re-evaluated using a longitudinal technique, taken at every third cardiac cycle, along the entire vessel...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28922883/proximal-junctional-kyphosis-prevention-strategies-a-video-technique-guide
#13
Michael M Safaee, Joseph A Osorio, Kushagra Verma, Shay Bess, Christopher I Shaffrey, Justin S Smith, Robert Hart, Vedat Deviren, Christopher P Ames
BACKGROUND: Proximal junctional kyphosis (PJK) is a well-recognized complication in patients undergoing posterior instrumented fusion procedures for adult spinal deformity. Strategies that reduce rates of PJK have the potential to improve the safety of these operations and decrease cost by eliminating the need for revision surgery. OBJECTIVE: To present a set of surgical techniques that can decrease rates of PJK in adults undergoing surgery for spinal deformity...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28922881/intraoperative-flow-800-analysis-for-intramedullary-cystic-lesion-a-technical-case-report
#14
Masahiro Sawada, Toshihiro Munemitsu, Masato Hojo
BACKGROUND AND IMPORTANCE: During intramedullary lesion surgery, the lesion site and the posterior median sulcus (PMS) should be accurately identified prior to myelotomy to avoid severe injury of the posterior funiculus. However, intramedullary lesions are fundamentally invisible until the myelotomy is performed. Furthermore, the PMS location is frequently unclear due to lesion-induced swelling or distortion of the spinal cord. Intraoperative indocyanine green videoangiography (ICG-VA) followed by FLOW 800 analysis, which shows vascularization of the spinal parenchyma, may provide a solution for these problems in specific cases...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28922880/a-side-door-to-meckel-s-cave-anatomic-feasibility-study-for-the-lateral-transorbital-approach
#15
Blake Harrison Priddy, Cristian Ferrareze Nunes, Andre Beer-Furlan, Ricardo Carrau, Iacopo Dallan, Daniel Monte-Serrat Prevedello
BACKGROUND: In the last decade, endoscopic skull base surgery has significantly developed and generated a plethora of techniques and approaches for access to the cranial ventral floor. However, the exploration for the least-aggressive, maximally efficient approach continues. OBJECTIVE: To describe in detail an anatomical study, along with the technical nuances of a novel endoscopic approach to Meckel's Cave (MC) using a lateral transorbital (LTO) route. METHODS: Eighteen orbits of injected cadaveric specimens were operated on, using an endoscopic LTO approach to MC, middle cranial fossa, and paramedian skull base preserving the orbital rim...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28922602/cucurbit-7-uril-induced-formation-of-fret-enabled-uni-lamellar-lipid-vesicles
#16
Shilpi Kushwaha, Arunava Maity, Monalisa Gangopadhyay, Sapna Ravindranathan, Pattuparambil R Rajamohanan, Amitava Das
A unique fluorescence resonance energy transfer (FRET) process is found to be operational in a unilamellar lipid self-assembly in the aqueous phase. A newly synthesized naphthyl based long chain lipid derivative [N-(naphthalene-1-ylmethyl)tetradecane-1-ammonium chloride, 14NA+] forms various self-assembled architectures in the aqueous phase. Controlled changes in lipid concentration lead to a transition of the self-assemblies from micelles to vesicles to rods. In the presence of cucurbit[7]uril (CB7), 14NA+ forms a host-guest [2]pseudorotaxane complex (CB7∋14NA+) and secondary interactions lead to the formation of a lipid bilayer with hydrophobic pockets situated in between the layers...
September 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28922351/estimation-of-the-mechanical-properties-of-the-eye-through-the-study-of-its-vibrational-modes
#17
M Á Aloy, J E Adsuara, P Cerdá-Durán, M Obergaulinger, J J Esteve-Taboada, T Ferrer-Blasco, R Montés-Micó
Measuring the eye's mechanical properties in vivo and with minimally invasive techniques can be the key for individualized solutions to a number of eye pathologies. The development of such techniques largely relies on a computational modelling of the eyeball and, it optimally requires the synergic interplay between experimentation and numerical simulation. In Astrophysics and Geophysics the remote measurement of structural properties of the systems of their realm is performed on the basis of (helio-)seismic techniques...
2017: PloS One
https://www.readbyqxmd.com/read/28922280/time-demand-and-radiation-dose-in-3d-fluoroscopy-based-navigation-assisted-3d-fluoroscopy-controlled-pedicle-screw-instrumentations
#18
Horst Balling
STUDY DESIGN: Prospective single-center cohort study to record additional time requirements and radiation dose in navigation-assisted O-arm-controlled pedicle screw (PS) instrumentations. OBJECTIVE: To evaluate amount of extra-time and radiation dose for navigation-assisted PS instrumentations of the thoracolumbosacral spine using O-arm 3D-real-time-navigation (O3DN) compared to non-navigated spinal procedures (NNSP) with a single C-arm and postoperative computed tomography (CT) scan for controlling PS positions...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28922277/percutaneous-posterior-trans-articular-atlantoaxial-fixation-for-the-treatment-of-odontoid-fractures-in-the-elderly-a-prospective-study
#19
Mohamed Alhashash, Mootaz Shousha, Hany Gendy, Ahmed Samir Barakat, Heinrich Boehm
STUDY DESIGN: A prospective study of 20 multimorbid patients older than 65 years undergoing minimally invasive surgical treatment for odontoid fracture. OBJECTIVES: To analyze the results of percutaneous transarticular atlantoaxial screw fixation as a new minimally invasive treatment modality in this high risk group of patients. SUMMARY OF BACKGROUND DATA: Odontoid fractures are a common injury pattern in the elderly. These fractures typically present significant challenges as geriatric patients often have multiple comorbidities that may adversely affect fracture management...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28922250/use-of-pedicled-buccal-fat-pad-for-midface-augmentation
#20
Tae Sung Lee, Sanghoon Park
The pedicled buccal fat pad has occasionally been used for the closure of oroantral and oronasal fistulae. However, this versatile and convenient technique has not been used widely in the field of esthetic surgery. The main cosmetic interest in the buccal fat pads was to surgically extract them to reduce cheek prominence. Here, the authors introduce a novel operative technique using the pedicled buccal fat pad for midface augmentation in patients with deficient soft-tissue volume, particularly in the anterior malar or paranasal region...
September 15, 2017: Journal of Craniofacial Surgery
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