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https://www.readbyqxmd.com/read/28216527/usefulness-of-intraoperative-cone-beam-ct-images-on-video-assisted-thoracic-surgery
#1
Harutaka Hisano, Tohru Sakuragi, Yoshinobu Kakiuchi, Satoshi Takita, Yuuji Takeda, Shigeki Morita, Hiroyuki Irie
For the resection of pulmonary ground glass opacity (GGO) or non-palpable nodule on video-assisted thoracic surgery (VATS), preoperative computed tomography (CT)-guided VATS marker pricking is usually performed. Recently, air embolisms after VATS marker pricking have been reported to be serious problems. The purpose of this study was to evaluate the usefulness of intraoperative cone beam CT images on VATS to avoid preoperative VATS marker pricking. The CT number of the both GGO and nodule indicate the range from -200 to -800 HU in general...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28213945/optimization-of-initial-propofol-bolus-dose-for-eeg-narcotrend-index-guided-transition-from-sevoflurane-induction-to-intravenous-anesthesia-in-children
#2
Nils Dennhardt, Dietmar Boethig, Christiane Beck, Sebastian Heiderich, Martin Boehne, Andreas Leffler, Barbara Schultz, Robert Sümpelmann
BACKGROUND: Sevoflurane induction followed by intravenous anesthesia is a widely used technique to combine the benefits of an easier and less traumatic venipuncture after sevoflurane inhalation with a recovery with less agitation, nausea, and vomiting after total intravenous anesthesia (TIVA). Combination of two different anesthetics may lead to unwanted burst suppression in the electroencephalogram (EEG) during the transition phase. OBJECTIVE: The objective of this prospective clinical observational study was to identify the optimal initial propofol bolus dose for a smooth transition from sevoflurane induction to TIVA using the EEG Narcotrend Index (NI)...
February 18, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28213166/influence-of-clamping-stress-and-duration-on-the-trauma-of-liver-tissue-during-surgery-operation
#3
Jin Wang, Qing-Yuan Yu, Wei Li, Bing-Rui Wang, Zhong-Rong Zhou
BACKGROUND: Tissue grasping damage often occurs in minimally invasive surgery, which would increase the postoperative recovery time and the risk of surgical complications. The purpose of this study was to evaluate the relationship between liver tissue trauma and compression stress magnitude and duration during tissue clamping operation. METHODS: The clamping experiments of liver tissues in vivo were conducted by using a universal soft tissue mechanical testing machine under different clamping stress magnitudes and durations...
February 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28210504/comparison-of-maximum-stretch-forces-between-femtosecond-laser-assisted-capsulotomy-and-continuous-curvilinear-capsulorhexis
#4
Mari Takagi, Takashi Kojima, Kei Ichikawa, Yoshiki Tanaka, Yukihito Kato, Rie Horai, Akeno Tamaoki, Kazuo Ichikawa
The current study reports comparing the postoperative mechanical properties of the anterior capsule between femtosecond laser capsulotomy (FLC) and continuous curvilinear capsulorhexis (CCC) of variable size and shape in porcine eyes. All CCCs were created using capsule forceps. Irregular or eccentric CCCs were also created to simulate real cataract surgery. For FLC, capsulotomies 5.3 mm in diameter were created using the LenSx® (Alcon) platform. Fresh porcine eyes were used in all experiments. The edges of the capsule openings were pulled at a constant speed using two L-shaped jigs...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28203253/the-use-of-laparoscopy-simulation-to-explore-gender-differences-in-resident-surgical-confidence
#5
Rebecca L Flyckt, Eliza E White, Linnea R Goodman, Catherine Mohr, Sanjeev Dutta, Kristine M Zanotti
Background. The objective of this study was to determine whether female surgical residents underestimate their surgical abilities relative to males on a standardized test of laparoscopic skill. Methods. Twenty-six male and female general surgery residents and 25 female obstetrics and gynecology residents at two academic centers were asked to predict their score prior to undergoing the Fundamentals of Laparoscopic Surgery standardized skills exam. Actual and predicted score as well as delta values (predicted score minus actual score) were compared between residents...
2017: Obstetrics and Gynecology International
https://www.readbyqxmd.com/read/28202996/-surgical-reconstruction-of-maxillary-defects-using-a-computer-assisted-techniques
#6
W B Zhang, Y Yu, Y Wang, X J Liu, C Mao, C B Guo, G Y Yu, X Peng
The maxilla is the most important bony support of the mid-face skeleton and is critical for both esthetics and function. Maxillary defects, resulting from tumor resection, can cause severe functional and cosmetic deformities. Furthermore, maxillary reconstruction presents a great challenge for oral and maxillofacial surgeons. Nowadays, vascularized composite bone flap transfer has been widely used for functional maxillary reconstruction. In the last decade, we have performed a comprehensive research on functional maxillary reconstruction with free fibula flap and reported excellent functional and acceptable esthetic results...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28199931/a-personalized-3d-printed-prosthetic-joint-replacement-for-the-human-temporomandibular-joint-from-implant-design-to-implantation
#7
David C Ackland, Dale Robinson, Michael Redhead, Peter Vee Sin Lee, Adrian Moskaljuk, George Dimitroulis
Personalized prosthetic joint replacements have important applications in cases of complex bone and joint conditions where the shape and size of off-the-shelf components may not be adequate. The objective of this study was to design, test and fabricate a personalized 3D-printed prosthesis for a patient requiring total joint replacement surgery of the temporomandibular joint (TMJ). The new 'Melbourne' prosthetic TMJ design featured a condylar component sized specifically to the patient and fixation screw positions that avoid potential intra-operative damage to the mandibular nerve...
February 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28197224/a-foreign-body-reaction-to-surgicel-%C3%A2-in-a-lymph-node-diagnosed-by-endobronchial-ultrasound-guided-transbronchial-needle-aspiration
#8
Diana Badenes, Lara Pijuan, Víctor Curull, Albert Sánchez-Font
Surgicel(®) (Ethicon, North Ryde, NSW, Australia) is an absorbable sheet of oxidized cellulose polyanhydroglucuronic acid polymer used as an hemostatic in cardiovascular and thoracic surgery. In some cases, the retained material may cause foreign body granulomatous reactions and simulate tumor recurrence, an abscess, an hematoma, or an infection. We report the case of a 55-year-old patient who was operated of a lung adenocarcinoma. In the thoracic computed tomography scan 1 year after the surgery, a right paratracheal lymph node was detected, so endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) was performed suspecting recurrence of the tumor...
January 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/28196474/biodegradable-magnesium-herbert-screw-image-quality-and-artifacts-with-radiography-ct-and-mri
#9
Lena Sonnow, Sören Könneker, Peter M Vogt, Frank Wacker, Christian von Falck
BACKGROUND: Magnesium alloys have recently been rediscovered as biodegradable implants in musculoskeletal surgery. This study is an ex-vivo trial to evaluate the imaging characteristics of magnesium implants in different imaging modalities as compared to conventional metallic implants. METHODS: A CE-approved magnesium Herbert screw (MAGNEZIX®) and a titanium screw of the same dimensions (3.2x20 mm) were imaged using different modalities: digital radiography (DX), multidetector computed tomography (MDCT), high resolution flat panel CT (FPCT) and magnetic resonance imaging (MRI)...
February 14, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28193299/otolaryngology-outreach-to-komfo-anokye-teaching-hospital-a-medical-and-educational-partnership
#10
B Waller, R Larsen-Reindorf, M Duah, J Opoku-Buabeng, B M Edwards, D Brown, J Moyer, M Prince, G J Basura
BACKGROUND: Medical and educational partnerships between high- and low-resourced countries provide opportunities to have a long-term meaningful impact on medical training and healthcare delivery. METHODS: An otolaryngology partnership between Komfo Anokye Teaching Hospital in Kumasi, Ghana, and the University of Michigan Department of Otolaryngology/Head and Neck Surgery has been undertaken to enhance healthcare delivery at both institutions. RESULTS: A temporal bone dissection laboratory, with the equipment to perform dedicated otological surgery, and academic platforms for clinical and medical education and residency training have been established...
February 14, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28192280/iterative-reconstruction-of-sipm-light-response-functions-in-a-square-shaped-compact-gamma-camera
#11
Andrey Morozov, Francisco Alves, Joao Marcos, Raimundo Martins, Luis Pereira, Vladimir Solovov, Vitaly Chepel
Compact gamma cameras with a square-shaped monolithic scintillator crystal and an array of silicon photomultipliers (SiPMs) are actively being developed for applications in areas such as small animal imaging, cancer diagnostics and radiotracer guided surgery. Statistical methods of position reconstruction, which are potentially superior to the traditional centroid method, require accurate knowledge of the spatial response of each photomultiplier. Using both Monte Carlo simulations and experimental data obtained with a camera prototype, we show that the spatial response of all photomultipliers (light response functions) can be parameterized with axially symmetric functions obtained iteratively from flood field irradiation data...
February 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28190372/training-performance-of-laparoscopic-surgery-in-two-and-three-dimensional-displays
#12
Chiuhsiang Joe Lin, Chih-Feng Cheng, Hung-Jen Chen, Kuan-Ying Wu
INTRODUCTION: This research investigated differences in the effects of a state-of-art stereoscopic 3-dimensional (3D) display and a traditional 2-dimensional (2D) display in simulated laparoscopic surgery over a longer duration than in previous publications and studied the learning effects of the 2 display systems on novices. METHODS: A randomized experiment with 2 factors, image dimensions and image sequence, was conducted to investigate differences in the mean movement time, the mean error frequency, NASA-TLX cognitive workload, and visual fatigue in pegboard and circle-tracing tasks...
February 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28188484/estimation-of-attachment-regions-of-hip-muscles-in-ct-image-using-muscle-attachment-probabilistic-atlas-constructed-from-measurements-in-eight-cadavers
#13
Norio Fukuda, Yoshito Otake, Masaki Takao, Futoshi Yokota, Takeshi Ogawa, Keisuke Uemura, Ryota Nakaya, Kazunori Tamura, Robert B Grupp, Amirhossein Farvardin, Mehran Armand, Nobuhiko Sugano, Yoshinobu Sato
PURPOSE: Patient-specific musculoskeletal biomechanical simulation is useful in preoperative surgical planning and postoperative assessment in orthopedic surgery and rehabilitation medicine. A difficulty in application of the patient-specific musculoskeletal modeling comes from the fact that the muscle attachment regions are typically invisible in CT and MRI. Our purpose is to develop a method for estimating patient-specific muscle attachment regions from 3D medical images and to validate with cadaver experiments...
February 10, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28188003/current-status-of-simulation-based-training-tools-in-orthopedic-surgery-a-systematic-review
#14
Michael Morgan, Abdullatif Aydin, Alan Salih, Shibby Robati, Kamran Ahmed
OBJECTIVE: To conduct a systematic review of orthopedic training and assessment simulators with reference to their level of evidence (LoE) and level of recommendation. DESIGN: Medline and EMBASE library databases were searched for English language articles published between 1980 and 2016, describing orthopedic simulators or validation studies of these models. All studies were assessed for LoE, and each model was subsequently awarded a level of recommendation using a modified Oxford Centre for Evidence-Based Medicine classification, adapted for education...
February 7, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28183674/albumin-coatings-by-alternating-current-electrophoretic-deposition-for-improving-corrosion-resistance-and-bioactivity-of-titanium-implants
#15
Sarah Höhn, Annabel Braem, Bram Neirinck, Sannakaisa Virtanen
Although Ti alloys are generally regarded to be highly corrosion resistant, inflammatory conditions following surgery can instigate breakdown of the TiO2 passivation layer leading to an increased metal ion release. Furthermore proteins present in the surrounding tissue will readily adsorb on a titanium surface after implantation. In this paper alternating current electrophoretic deposition (AC-EPD) of bovine serum albumin (BSA) on Ti6Al4V was investigated in order to increase the corrosion resistance and control the protein adsorption capability of the implant surface...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28182686/predicting-structure-function-relations-and-survival-following-surgical-and-bronchoscopic-lung-volume-reduction-treatment-of-emphysema
#16
Jarred R Mondoñedo, Béla Suki
Lung volume reduction surgery (LVRS) and bronchoscopic lung volume reduction (bLVR) are palliative treatments aimed at reducing hyperinflation in advanced emphysema. Previous work has evaluated functional improvements and survival advantage for these techniques, although their effects on the micromechanical environment in the lung have yet to be determined. Here, we introduce a computational model to simulate a force-based destruction of elastic networks representing emphysema progression, which we use to track the response to lung volume reduction via LVRS and bLVR...
February 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28181795/water-responsive-shape-recovery-induced-buckling-in-biodegradable-photo-cross-linked-poly-ethylene-glycol-peg-hydrogel
#17
Abhijit Vijay Salvekar, Wei Min Huang, Rui Xiao, Yee Shan Wong, Subbu S Venkatraman, Kiang Hiong Tay, Ze Xiang Shen
The phenomenon of recovering the permanent shape from a severely deformed temporary shape, but only in the presence of the right stimulus, is known as the shape memory effect (SME). Materials with such an interesting effect are known as shape memory materials (SMMs). Typical stimuli to trigger shape recovery include temperature (heating or cooling), chemical (including water/moisture and pH value), and light. As a SMM is able not only to maintain the temporary shape but also to respond to the right stimulus when it is applied, via shape-shifting, a seamless integration of sensing and actuation functions is achieved within one single piece of material...
February 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28178577/operative-and-diagnostic-hysteroscopy-a-novel-learning-model-combining-new-animal-models-and-virtual-reality-simulation
#18
Alfred Bassil, Chrystèle Rubod, Yves Borghesi, Yohan Kerbage, Elie Servan Schreiber, Henri Azaïs, Charles Garabedian
CONTEXT: Hysteroscopy is one of the most common gynaecological procedure. Training for diagnostic and operative hysteroscopy can be achieved through numerous previously described models like animal models or virtual reality simulation. We present our novel combined model associating virtual reality and bovine uteruses and bladders. STUDY DESIGN: End year residents in obstetrics and gynaecology attended a full day workshop. The workshop was divided in theoretical courses from senior surgeons and hands-on training in operative hysteroscopy and virtual reality Essure(®) procedures using the EssureSim™ and Pelvicsim™ simulators with multiple scenarios...
February 1, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28169225/intensity-based-2d-3d-registration-for-lead-localization-in-robot-guided-deep-brain-stimulation
#19
Stefan Hunsche, Dieter Sauner, Faycal El Majdoub, Clemens Neudorfer, Joerg Poggenborg, Axel Gossmann, Mohammad Maarouf
Intraoperative assessment of lead localization has become a standard procedure during deep brain stimulation (DBS) surgery in many centers, allowing immediate verification of targeting accuracy and, if necessary, adjustment of the trajectory. The most suitable imaging modality to determine lead positioning, however, remains controversially discussed. Current approaches entail the implementation of computed tomography and magnetic resonance imaging. In the present study, we adopted the technique of intensity-based 2D 3D registration that is commonly employed in stereotactic radiotherapy and spinal surgery...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28168731/statistical-methodology-for-estimating-the-mean-difference-in-a-meta-analysis-without-study-specific-variance-information
#20
Patarawan Sangnawakij, Dankmar Böhning, Stephen Adams, Michael Stanton, Heinz Holling
Statistical inference for analyzing the results from several independent studies on the same quantity of interest has been investigated frequently in recent decades. Typically, any meta-analytic inference requires that the quantity of interest is available from each study together with an estimate of its variability. The current work is motivated by a meta-analysis on comparing two treatments (thoracoscopic and open) of congenital lung malformations in young children. Quantities of interest include continuous end-points such as length of operation or number of chest tube days...
February 6, 2017: Statistics in Medicine
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