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https://www.readbyqxmd.com/read/28547894/internal-fixation-of-complicated-acetabular-fractures-directed-by-preoperative-surgery-with-3d-printing-models
#1
Zhao-Jie Liu, Jian Jia, Yin-Guang Zhang, Wei Tian, Xin Jin, Yong-Cheng Hu
The purpose of this article is to evaluate the efficacy and feasibility of preoperative surgery with 3D printing-assisted internal fixation of complicated acetabular fractures. A retrospective case review was performed for the above surgical procedure. A 23-year-old man was confirmed by radiological examination to have fractures of multiple ribs, with hemopneumothorax and communicated fractures of the left acetabulum. According to the Letounel and Judet classification, T-shaped fracture involving posterior wall was diagnosed...
May 26, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28547013/new-cfd-tools-to-evaluate-nasal-airflow
#2
M A Burgos, E Sanmiguel-Rojas, C Del Pino, M A Sevilla-García, F Esteban-Ortega
Computational fluid dynamics (CFD) is a mathematical tool to analyse airflow. As currently CFD is not a usual tool for rhinologists, a group of engineers in collaboration with experts in Rhinology have developed a very intuitive CFD software. The program MECOMLAND(®) only required snapshots from the patient's cross-sectional (tomographic) images, being the output those results originated by CFD, such as airflow distributions, velocity profiles, pressure, temperature, or wall shear stress. This is useful complementary information to cover diagnosis, prognosis, or follow-up of nasal pathologies based on quantitative magnitudes linked to airflow...
May 25, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28544316/negating-the-fulcrum-effect-in-manual-laparoscopic-surgery-investigating-skill-acquisition-with-a-haptic-simulator
#3
Adam J Spiers, Sarah Baillie, Tony G Pipe, George Asimakopolous
BACKGROUND: Manual laparoscopic surgery requires extensive training and familiarization. It has been suggested that motion inversion caused by the 'fulcrum effect' is key to motor challenges. We investigate the potential of a conceptual semi-robotic handheld tool that negates natural inversion. METHODS: A custom laparoscopic simulator with haptic feedback was developed to allow interactive evaluation of the conceptual tool via virtual prototyping, prior to fabricating a physical prototype...
May 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28542103/predictive-accuracy-of-surgimaptm-surgical-planning-for-sagittal-imbalance-a-cohort-study
#4
Francesco Langella, Jorge Hugo Villafañe, Marco Damilano, Riccardo Cecchinato, Matteo Pejrona, Maryem Ismael, Pedro Berjano
STUDY DESIGN: A cohort study. OBJECTIVE: To evaluate the predictive value of surgical planning using Surgimap™ regarding postoperative sagittal alignment. SUMMARY OF BACKGROUND DATA: Surgical planning in sagittal imbalance is recognized as a key step of treatment to ensure results. METHODS: The study involved 40 non-consecutive patients who underwent surgery for sagittal misalignment. Postoperative alignment measured by sagittal vertical axis (SVA) and pelvic tilt (PT) was considered the gold standard...
May 25, 2017: Spine
https://www.readbyqxmd.com/read/28541193/analysis-of-energy-based-metrics-for-laparoscopic-skills-assessment
#5
Behnaz Poursartip, Marie-Eve LeBel, Rajni Patel, Michael Naish, Ana Luisa Trejos
OBJECTIVE: The complexity of Minimally Invasive Surgery (MIS) requires that trainees practice MIS skills in numerous training sessions. The goal of these training sessions is to learn how to move the instruments smoothly without damaging the surrounding tissue and achieving operative tasks with accuracy. In order to enhance the efficiency of these training sessions, the proficiency of the trainees should be assessed using an objective assessment method. Several performance metrics have been proposed and analyzed for MIS tasks...
May 19, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28538668/biomechanical-modeling-of-pterygium-radiation-surgery-a-retrospective-case-study
#6
Bojan Pajic, Daniel M Aebersold, Andreas Eggspuehler, Frederik R Theler, Harald P Studer
Pterygium is a vascularized, invasive transformation on the anterior corneal surface that can be treated by Strontium-/Yttrium90 beta irradiation. Finite element modeling was used to analyze the biomechanical effects governing the treatment, and to help understand clinically observed changes in corneal astigmatism. Results suggested that irradiation-induced pulling forces on the anterior corneal surface can cause astigmatism, as well as central corneal flattening. Finite element modeling of corneal biomechanics closely predicted the postoperative corneal surface (astigmatism error -0...
May 24, 2017: Sensors
https://www.readbyqxmd.com/read/28538573/pursuing-mirror-image-reconstruction-in-unilateral-microtia-customizing-auricular-framework-by-application-of-three-dimensional-imaging-and-three-dimensional-printing
#7
Hsin-Yu Chen, Li-Shia Ng, Chun-Shin Chang, Ting-Chen Lu, Ning-Hung Chen, Zung-Chung Chen
BACKGROUND: Advances in three-dimensional imaging and three-dimensional printing technology have expanded the frontier of presurgical design for microtia reconstruction from two-dimensional curved lines to three-dimensional perspectives. This study presents an algorithm for combining three-dimensional surface imaging, computer-assisted design, and three-dimensional printing to create patient-specific auricular frameworks in unilateral microtia reconstruction. METHODS: Between January of 2015 and January of 2016, six patients with unilateral microtia were enrolled...
June 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28537779/simulation-model-for-laparoscopic-foregut-surgery-the-university-of-north-carolina-foregut-model
#8
Francisco Schlottmann, Neal S Murty, Marco G Patti
BACKGROUND: A significant gap presently exists between box-lap and virtual-reality simulators and live surgery. Live animal and cadaver use has significant downsides. We have developed a high fidelity, real tissue simulator that allows training in laparoscopic foregut operations. METHODS: Our foregut surgery model is based on porcine tissue blocks that include lungs, heart, aorta, esophagus, diaphragm, stomach, duodenum, liver, and spleen. The tissue block is mounted in a human mannequin and perfused with artificial blood...
May 24, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28535919/precision-iort-image-guided-intraoperative-radiation-therapy-igiort-using-online-treatment-planning-including-tissue-heterogeneity-correction
#9
Frank Schneider, Frederic Bludau, Sven Clausen, Jens Fleckenstein, Udo Obertacke, Frederik Wenz
BACKGROUND: To the present date, IORT has been eye and hand guided without treatment planning and tissue heterogeneity correction. This limits the precision of the application and the precise documentation of the location and the deposited dose in the tissue. Here we present a set-up where we use image guidance by intraoperative cone beam computed tomography (CBCT) for precise online Monte Carlo treatment planning including tissue heterogeneity correction. MATERIALS AND METHODS: An IORT was performed during balloon kyphoplasty using a dedicated Needle Applicator...
May 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28534312/evaluation-of-a-novel-multi-articulated-endoscope-proof-of-concept-through-a-virtual-simulation
#10
Tuukka Karvonen, Yusuke Muranishi, Goshiro Yamamoto, Tomohiro Kuroda, Toshihiko Sato
PURPOSE: In endoscopic surgery such as video-assisted thoracoscopic surgery and laparoscopic surgery, providing the surgeon a good view of the target is important. Rigid endoscope has for years been the go-to tool for this purpose, but it has certain limitations like the inability to work around obstacles. To improve on current tools, a novel multi-articulated endoscope (MAE) is currently under development. To investigate its feasibility and possible value, we performed a user test using virtual prototype of the MAE with the intent to show that it outperforms the conventional endoscope while bringing minimal additional burden to the operator...
May 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28533620/benefits-of-using-transcranial-magnetic-stimulation-as-a-tool-to-facilitate-the-chronic-knee-injury-rehabilitation
#11
Jae-Moo Lee, Ji-Hang Lee
[Purpose] While primary motor cortex activation has been implicated as a key factor in the arthrogenic muscle inhibition after knee joint injury, no viable rehabilitation protocol has been developed to accommodate this factor. In this study, transcranial magnetic stimulation was applied as a means of dissipating arthrogenic muscle inhibition by introducing temporary motor cortex excitation prior to the rehabilitation. [Subjects and Methods] Twenty-four subjects who have underwent the surgery due to knee injury were recruited, and randomly assigned to the control or the simulation groups...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28533078/simulation-of-carotid-artery-stenting-reduces-training-procedure-and-fluoroscopy-times
#12
Andre F Gosling, Daniel E Kendrick, Ann H Kim, Anil Nagavalli, Ethan S Kimball, Nathaniel T Liu, Vikram S Kashyap, John C Wang
OBJECTIVE: Outcomes from carotid artery stenting (CAS) are related to experience and technical expertise of the operator. Simulation of CAS may enhance clinical proficiency. We interrogated the impact of endovascular simulation of CAS procedures in operators who are at various stages of training. METHODS: Twelve trainees (students [n = 4]; junior surgery residents, postgraduate year [PGY] 1-3 [n = 4]; and senior surgery residents or fellows, PGY 4-7 [n = 4]) were apprised of characteristics of an endovascular simulator and CAS procedures...
May 19, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28532942/robot-assisted-simulated-cataract-surgery
#13
Tristan Bourcier, Jimmy Chammas, Pierre-Henri Becmeur, Arnaud Sauer, David Gaucher, Philippe Liverneaux, Jacques Marescaux, Didier Mutter
PURPOSE: To evaluate the feasibility of robot-assisted simulated cataract surgery. SETTING: Institut de Recherche Contre les Cancers de l'Appareil Digestif, European Institute of Telesurgery, and Strasbourg University Hospital, Strasbourg, France. DESIGN: Experimental study. METHODS: Cataract surgeries were performed on a Kitaro cataract wet-lab training system simultaneously using the Da Vinci Xi robotic surgical system and the Whitestar Signature phacoemulsification system...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28530492/3d-printing-in-liver-surgery-a-systematic-review
#14
Jan Sylwester Witowski, Jasamine Coles-Black, Tomasz Zbigniew Zuzak, Michał Pędziwiatr, Jason Chuen, Piotr Major, Andrzej Budzyński
BACKGROUND: Rapid growth of three-dimensional (3D) printing in recent years has led to new applications of this technology across all medical fields. This review article presents a broad range of examples on how 3D printing is facilitating liver surgery, including models for preoperative planning, education, and simulation. MATERIALS AND METHODS: We have performed an extensive search of the medical databases Ovid/MEDLINE and PubMed/EMBASE and screened articles fitting the scope of review, following previously established exclusion criteria...
May 22, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28530132/development-of-a-high-fidelity-pressurized-porcine-beating-heart-simulator-for-cardiac-surgery-training
#15
Igo B Ribeiro, Janet M C Ngu, Gurinder Gill, Fraser D Rubens
BACKGROUND: Development of a high-fidelity cardiac surgery simulator (CSS) requires integration of a heart model with a mock cardiopulmonary bypass (CPB) circuit that can provide feedback to mimic the pathophysiology of cardiac surgery. However, the cost of commercially available simulators precludes regular use. We describe steps in the construction of a high-fidelity CSS that integrates a pulsatile paracorporeal ventricular-assist device (Pulse-VAD) and a commercially available CPB simulator...
May 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28529430/mechanical-behavior-and-wall-remodeling-of-blood-vessels-under-axial-twist
#16
Han Hai-Chao, Liu Qin, Jiang Zong-Lai
Blood vessels are often subjected to axial torsion (or twist) due to body movement or surgery. However, there are few studies on blood vessel under twist. This review first summarizes the clinical observation on the twist of blood vessels and then presents what we know about the mechanical behaviors of blood vessel under twist, including the constitutive models. The state of art researches on the remodeling of blood vessels under twist via ex vivo organ culture, in vivo animal experiments, and mathematical model simulations are further discussed...
August 2016: Yi Yong Sheng Wu Li Xue
https://www.readbyqxmd.com/read/28528114/postoperative-outcomes-of-two-and-three-dimensional-planning-in-orthognathic-surgery-a-comparative-study
#17
Ting-Yu Wu, Hsiu-Hsia Lin, Lun-Jou Lo, Cheng-Ting Ho
OBJECTIVE: Compared with conventional two-dimensional (2D) planning, three-dimensional (3D) planning in orthognathic surgery yields more accurate anatomical information and enables the precise positioning of maxillary and mandibular segments, particularly for patients with facial asymmetry. Accordingly, surgical outcomes achieved using 3D planning should be superior. This study determined the differences between the 2D and 3D planning techniques by comparing their surgical outcomes. MATERIALS AND METHODS: In this retrospective study, patients who underwent surgery following the traditional 2D planning technique were classified into the 2D planning group...
April 23, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28526634/microsurgery-simulation-training-system-and-set-up-an-essential-system-to-complement-every-training-programme
#18
Dhalia Masud, Nadine Haram, Margarita Moustaki, Whitney Chow, Samer Saour, Pari Naz Mohanna
INTRODUCTION: Microsurgical techniques are essential in plastic surgery; however, inconsistent training practices, acquiring these skills can be difficult. To address this, we designed a standardised laboratory-based microsurgical training programme, which allows trainees to develop their dexterity, visuospatial ability, operative flow and judgement as separate components. METHOD: Thirty trainees completed an initial microsurgical anastomosis on a chicken femoral artery, assessed using the structured assessment of microsurgical skills (SAMS) method...
April 7, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28522939/identification-of-protein-targets-in-cerebral-endothelial-cells-for-brain-arteriovenous-malformation-avms-molecular-therapies
#19
Margaret Simonian, Rachel R Ogorzalek Loo, Nalaka Rannulu, Joseph A Loo, Mark P Molloy, Marcus A Stoodley
BACKGROUND: To develop a new molecular targeted treatment for brain (AVMs), identification of membrane proteins that are localised on the AVM endothelium is crucial. Current treatment methods are surgery and radiosurgery. However, complete occlusion post radiosurgery are achieved within 3 years, while patient remain at risk of haemorrhage. This study aims to identify potential protein targets in AVM endothelial cells that discriminate these vessels from normal vessels; these proteins targets will be investigated for the molecular therapy of brain AVMs to promote rapid thrombosis after radiosurgery...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/28521989/synthesis-of-strontium-chondroitin-sulfate-and-the-evaluation-of-its-capability-to-attenuate-osteoarthritis
#20
F B Ma, N Liu, N Hu, C Y Wen, B Tang
Osteoarthritis (OA) is the most prevalent musculoskeletal disorder and the leading cause of joint disability in elderly patients. In this study, we fabricated strontium chondroitin sulfate (SrCS), a new polysaccharide-metal ion complex that is the combination of chondroitin sulfate and strontium, which are two widely adopted chemicals in OA clinical management. The structural, chemical compositions and morphology of as-fabricated SrCS were systematically investigated. Cell proliferation test, RT-PCR and preliminary animal studies were conducted to evaluate the clinical potential of SrCS on OA treatment...
August 15, 2017: Carbohydrate Polymers
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