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https://www.readbyqxmd.com/read/29347832/wire-placement-in-the-sustentaculum-tali-using-a-2d-projection-based-software-application-for-mobile-c-arms-cadaveric-study
#1
Benedict Swartman, Dirk Frere, Wei Wei, Marc Schnetzke, Stephan Grechenig, Amir Matityahu, Nils Beisemann, Holger Keil, Jochen Franke, Paul Alfred Grützner, Sven Yves Vetter
BACKGROUND: Indirect screw fixation of the sustentaculum tali in the lateral-medial direction can be challenging due to the complex calcaneal anatomy. A novel 2-dimensional (2D) projection-based software application detects Kirschner wires (K-wires) and visualizes their intended direction as a colored trajectory. The aim of this prospectively randomized cadaver study was to investigate whether the software would facilitate the indirect K-wire placement in the sustentaculum tali. METHODS: In 20 cadaver foot specimens, K-wires were placed indirectly in the sustentaculum tali by an experienced and an inexperienced surgeon, with and without using the application...
January 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29346830/feasibility-of-navigable-percutaneous-disk-decompressor-l-disq-c-for-cervical-disk-herniation
#2
Youngki Hong, Seunghan Yoo, Nack Hwan Kim, Yushin Kim, Sangho Sohn, Sung-Young Yoon, Sangheon Lee
OBJECTIVE:  To assess the procedural efficacy and safety of a Navigable Percutaneous Disk Decompressor (L'DISQ-C) for cervical disk herniation. METHODS:  We performed intradiskal decompression on cervical spine specimens from five human cadavers using the L'DISQ-C under C-arm fluoroscopic guidance. We evaluated our success for positioning the navigable wand tip into the target region and recorded temperature variation at various distances from the wand tip in the cervical nucleus pulposus...
January 18, 2018: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29338860/learning-curve-of-image-guided-video-assisted-thoracoscopic-surgery-for-small-pulmonary-nodules-a-prospective-analysis-of-30-initial-patients
#3
Ming-Ju Hsieh, Chih-Tsung Wen, Hsin-Yueh Fang, Yu-Wen Wen, Chien-Cheng Lin, Yin-Kai Chao
OBJECTIVES: The use of image-guided video-assisted thoracoscopic surgery for simultaneous localization and removal of small solitary pulmonary nodules in a hybrid operation room using C-arm cone-beam computed tomography is gaining momentum. We sought to assess the effect of the learning curve on procedural parameters and clinical outcomes of image-guided video-assisted thoracoscopic surgery for treating patients with small solitary pulmonary nodules. METHODS: Clinical variables and treatment outcomes of the 30 initial patients with solitary pulmonary nodules who were treated with image-guided video-assisted thoracoscopic surgery at Chang Gung Memorial Hospital (Taiwan) were prospectively analyzed...
December 13, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29322910/flexible-memory-alloy-instrumentation-for-unilateral-transpedicular-kyphoplasty-and-guided-cement-augmentation-of-the-thoracic-spine
#4
G A Vastardis, A G Hadjipavlou, A E Marjan, M A Stojanovic, B Dial, K I Kazakos
The purpose of this novel study was to investigate the feasibility of unilateral transpedicular balloon kyphoplasty particularly of the upper thoracic vertebrae using an 11- gauge balloon and cement inserter, and to study the morphological parameters of the thoracic spine pedicles. We used four fresh frozen cadaveric thoracic spines with intact rib cages and skin for kyphoplasty from T1 to T12 vertebrae under C-arm fluoroscopy. The most limiting width of the pedicles 2.46+/-0.32mm was in the middle levels (T5-T8)...
March 2017: Acta Orthopaedica Belgica
https://www.readbyqxmd.com/read/29322907/-turn-laterally-to-the-left-the-need-for-uniform-c-arm-communication-terminology-during-orthopaedic-trauma-surgery
#5
R-J De Muinck Keizer, D S Klei, P J Van Koperen, C N Van Dijk, J C Goslings
To avoid disturbed teamwork, unnecessary radiation exposure, and procedural delays, we designed and tested a uniform communication language for use in fluoroscopy-assisted surgical procedures. Input of surgeons and radiographers was used to create a set of commands. The potential benefit of this terminology was explored in an experimental setting. There was a tremendous diversity in the currently used terminology. Use of the newly designed terminology showed a reduction of procedural time and amount of images needed...
March 2017: Acta Orthopaedica Belgica
https://www.readbyqxmd.com/read/29322072/plan-in-2-d-execute-in-3-d-an-augmented-reality-solution-for-cup-placement-in-total-hip-arthroplasty
#6
Javad Fotouhi, Clayton P Alexander, Mathias Unberath, Giacomo Taylor, Sing Chun Lee, Bernhard Fuerst, Alex Johnson, Greg Osgood, Russell H Taylor, Harpal Khanuja, Mehran Armand, Nassir Navab
Reproducibly achieving proper implant alignment is a critical step in total hip arthroplasty procedures that has been shown to substantially affect patient outcome. In current practice, correct alignment of the acetabular cup is verified in C-arm x-ray images that are acquired in an anterior-posterior (AP) view. Favorable surgical outcome is, therefore, heavily dependent on the surgeon's experience in understanding the 3-D orientation of a hemispheric implant from 2-D AP projection images. This work proposes an easy to use intraoperative component planning system based on two C-arm x-ray images that are combined with 3-D augmented reality (AR) visualization that simplifies impactor and cup placement according to the planning by providing a real-time RGBD data overlay...
April 2018: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29310336/removal-of-a-subdermal-contraceptive-implant-implanon-nxt-that-migrated-to-the-axilla-by-c-arm-guidance-a-case-report-and-review-of-the-literature
#7
Ji Ung Park, Han Sol Bae, Seung Mi Lee, Jaehoon Bae, Jeong Woo Park
RATIONALE: To report the distant migration of a subdermal contraceptive implant and to suggest that C arm-guided technique is one of the feasible options for removal of the device migrated to the axilla. PATIENT CONCERNS: A 41-year-old multipara with tingling sensation in the left axilla was referred for removal of an Implanon NXT which could not be palpated by physical examination or detected by ultrasound scanning. Finally, the device was detected by computed tomography and found migrating to the left axilla...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29298859/fast-acquisition-cone-beam-computed-tomography-initial-experience-with-a-10-s-protocol
#8
Visish M Srinivasan, Gouthami Chintalapani, Kevin Matthew Camstra, Sabih T Effendi, Jacob Cherian, Jeremiah N Johnson, Stephen R Chen, Peter Kan
BACKGROUND: Cone-beam computed tomography (CBCT) facilitates the acquisition of cross-sectional imaging in angiography suites using a rotational C-arm and digital flat panel detectors. The applications are numerous, including evaluation of implanted devices and localization of cerebrovascular lesions. We present and validate the clinical utility of an alternative fast CBCT acquisition protocol in the context of neurovascular device imaging. METHODS: Contrast-enhanced (CE)-CBCT images were acquired using a new 10 s protocol in a phantom head model, swine model, and in patients...
January 3, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29289382/head-to-head-immunogenicity-comparison-of-edmonston-zagreb-vs-aik-c-measles-vaccine-strains-in-infants-aged-8-12-months-a-randomized-clinical-trial
#9
Shahrokh Izadi, Seyed Mohsen Zahraei, Masoud Salehi, Mahdi Mohammadi, Seyed Mehdi Tabatabaei, Talat Mokhtari-Azad
BACKGROUND: A non-inferiority multi-centre parallel randomized double-blind trial was implemented in Zahedan district, Sistan-va-Baluchestan province, Iran, to compare the performance of the two measles vaccines which are in use in the National Immunization Programme of Iran and are of two different measles virus vaccine strains: Edmonston-Zagreb (EZ) strain vs. AIK-C strain. The main outcome measure was appearance of anti-measles antibody in sera. METHODS: 200 infants, 8-12 months old, whose parents consented for their children to be included in the study, were randomized in permutation blocks of size 4-8 in four Urban Health Clinics...
December 27, 2017: Vaccine
https://www.readbyqxmd.com/read/29274862/percutaneous-minimally-invasive-repair-of-acromioclavicular-joint-dislocation-using-cannulated-screws-under-ultrasonic-vs-c-arm-navigation-a-prospective-trial
#10
X Shui, S Chen, G Huang, J Kong, C Zhou, W Lin
INTRODUCTION: To compare percutaneous minimally invasive repair (PMIR) of acute acromioclavicular (AC) joint dislocation under ultrasound guidance (PMIR-UN) vs. C-arm navigation (PMIR-CN). HYPOTHESIS: PMIR-UN has similar functional and radiographic outcomes as PMIR-CN. MATERIALS AND METHODS: We treated 48 patients with acute grade III or V AC joint dislocation with surgical reduction and fixation with Kirschner wires and cannulated screws...
December 21, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29215500/feasibility-and-accuracy-of-thoracolumbar-minimally-invasive-pedicle-screw-placement-with-augmented-reality-navigation-technology
#11
Adrian Elmi-Terander, Rami Nachabe, Halldor Skulason, Kyrre Pedersen, Michael Söderman, John Racadio, Drazenko Babic, Paul Gerdhem, Erik Edström
STUDY DESIGN: Cadaveric laboratory study. OBJECTIVE: To assess the feasibility and accuracy of minimally invasive thoracolumbar pedicle screw placement using augmented reality (AR) surgical navigation SUMMARY OF BACKGROUND DATA.: Minimally invasive spine (MIS) surgery has increasingly become the method of choice for a wide variety of spine pathologies. Navigation technology based on AR has been shown to be feasible, accurate and safe in open procedures. AR technology may also be used for MIS surgery...
December 19, 2017: Spine
https://www.readbyqxmd.com/read/29193227/minimally-invasive-lag-screw-fixation-of-sacroiliac-luxation-fracture-using-a-dedicated-novel-instrument-system-apparatus-and-technique-description
#12
Loïc M Déjardin, Albane H Fauron, Laurent P Guiot, Reunan P Guillou
OBJECTIVE: To describe a novel Sacroiliac Luxation Instrument System (SILIS™) and its application in minimally invasive osteosynthesis (MIO) of sacroiliac luxations/fractures (SIL/F). The SILIS was designed to provide stable SIL/F reduction and accurate sacral screw placement while reducing personnel exposure to ionizing radiation during intraoperative fluoroscopy. STUDY DESIGN: Descriptive, proof of concept cadaveric study. METHODS: A right SIL and a left SIL/F were created on a Labrador Retriever that had died of natural causes...
November 29, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29188758/utility-of-intraoperative-computed-tomography-for-cochlear-implantation-in-patients-with-difficult-anatomy
#13
Christine S Kim, Alice Z Maxfield, David Foyt, Robert J Rapoport
OBJECTIVE AND IMPORTANCE: To describe cases that illustrate the utility of intraoperative computed tomography (CT) in cochlear implantation of patients with difficult temporal bone anatomy. CLINICAL PRESENTATION: A 2-year-old male with congenital X-linked stapes gusher syndrome and a 2-year-old female with enlarged vestibular aqueduct underwent successful cochlear implantation with the help of intraoperative CT. In the latter case, the initial intraoperative C-arm fluoroscopy suggested malposition of the electrode, however, was not able to provide details for adjustments...
November 30, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/29184661/application-of-an-rgbd-augmented-c-arm-for-minimally-invasive-scoliosis-surgery-assistance
#14
Séverine Habert, Ulrich Eck, Pascal Fallavollita, Stefan Parent, Nassir Navab, Farida Cheriet
Minimally invasive surgeries (MISs) are gaining popularity as alternatives to conventional open surgeries. In thoracoscopic scoliosis MIS, fluoroscopy is used to guide pedicle screw placement and to visualise the effect of the intervention on the spine curvature. However, cosmetic external appearance is the most important concern for patients, while correction of the spine and achieving coronal and sagittal trunk balance are the top priorities for surgeons. The authors present the feasibility study of the first intra-operative assistive system for scoliosis surgery composed of a single RGBD camera affixed on a C-arm which allows visualising in real time the surgery effects on the patient trunk surface in the transverse plane...
October 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/29184659/multi-modal-imaging-model-based-tracking-and-mixed-reality-visualisation-for-orthopaedic-surgery
#15
Sing Chun Lee, Bernhard Fuerst, Keisuke Tateno, Alex Johnson, Javad Fotouhi, Greg Osgood, Federico Tombari, Nassir Navab
Orthopaedic surgeons are still following the decades old workflow of using dozens of two-dimensional fluoroscopic images to drill through complex 3D structures, e.g. pelvis. This Letter presents a mixed reality support system, which incorporates multi-modal data fusion and model-based surgical tool tracking for creating a mixed reality environment supporting screw placement in orthopaedic surgery. A red-green-blue-depth camera is rigidly attached to a mobile C-arm and is calibrated to the cone-beam computed tomography (CBCT) imaging space via iterative closest point algorithm...
October 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/29180088/a-simple-new-screw-insertion-technique-without-extraction-for-broken-pedicle-screws
#16
Jinsang Kil, Jongtae Park
OBJECTIVE: Spinal transpedicular screw fixation is widely performed. Broken pedicle screw rates range from 3 to 7.1%. Several techniques have been described for extraction of broken pedicle screws. However, most of these techniques require special instruments. We describe a simple, modified technique for management of broken pedicle screws without extraction. No special instruments or drilling in an adjacent pedicle are required. METHODS: We used a high-speed air drill with a round burr...
November 24, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29179633/a-concept-for-electromagnetic-navigated-targeting-of-liver-tumors-using-an-angiographic-approach
#17
Marius Schwalbe, Tom Williamson, Iwan Paolucci, Torsten Fuss, Iris Baumgartner, Daniel Candinas, Stefan Weber, Pascale Tinguely
BACKGROUND: The benefits of using navigation technology for percutaneous local ablation of selected hepatocellular carcinoma (HCC) have been shown. Due to additional efforts in the procedural workflow, barriers to introducing navigation systems on a broad clinical level remain high. In this work, initial steps toward a novel concept for simple and precise targeting of HCC are evaluated. MATERIAL AND METHODS: The proposed technique is based on an angiographic approach using an intrahepatic electromagnetic (EM) reference, for consecutive percutaneous navigated positioning of ablation probes...
November 27, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29176297/treatment-of-a-large-pharyngeal-venous-malformation-using-transoral-sclerotherapy
#18
Asako Kuhara, Norimitsu Tanaka, Tomoko Kugiyama, Masamichi Koganemaru, Kensuke Kiyokawa, Toshi Abe
Management of venous malformation (VM) in the pharynx is challenging because of difficulties in needle access and the presence of nerves as well as other critical anatomical structures around the lesion. We describe the successful treatment of a large pharyngeal VM using transoral sclerotherapy. The patient, a 21-yearold male, visited our hospital for sclerotherapy treatment consultation after complaining of difficulty in swallowing because of a pharyngeal VM. Transoral sclerotherapy was successful, and the symptoms showed complete alleviation...
November 27, 2017: Kurume Medical Journal
https://www.readbyqxmd.com/read/29167830/single-injection-dual-phase-cbct-technique-ameliorates-results-of-trans-arterial-chemoembolization-for-hepatocellular-cancer
#19
REVIEW
Pierleone Lucatelli, Renato Argirò, Stefano Bascetta, Luca Saba, Carlo Catalano, Mario Bezzi, Giovanni Battista Levi Sandri
Cone-beam CT (CBCT) application to the field of trans-arterial chemoembolization has been recently the focus of several researches. This imaging modality is performed with a rotation of the C-arm around the patient, without needs of patient repositioning. Datasets are immediately processed, obtaining volumetric CT-like images with the possibility of post-processing and reconstruction of images. Dual phase CBCT recently introduced in clinical practice consists in a first arterial acquisition followed by a delayed acquisition corresponding to a venous phase...
2017: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29166785/elevated-radiation-exposure-associated-with-above-surface-flat-detector-mini-c-arm-use
#20
Dennis P Martin, Talia Chapman, Christopher Williamson, Brian Tinsley, Asif M Ilyas, Mark L Wang
BACKGROUND: This study aims to test the hypothesis that: (1) radiation exposure is increased with the intended use of Flat Surface Image Intensifier (FSII) units above the operative surface compared with the traditional below-table configuration; (2) this differential increases in a dose-dependent manner; and (3) radiation exposure varies with body part and proximity to the radiation source. METHODS: A surgeon mannequin was seated at a radiolucent hand table, positioned for volar distal radius plating...
November 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
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