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Video fluoroscopy

Teng Zhang, Siwei Bai, Ian Cook, Michal Szczesniak, Julia Maclean, Socrates Dokos, Teng Zhang, Siwei Bai, Ian Cook, Michal Szczesniak, Julia Maclean, Socrates Dokos, Siwei Bai, Michal Szczesniak, Socrates Dokos, Ian Cook, Julia Maclean, Teng Zhang
For patients with large or recurrent laryngeal cancer, total laryngectomy surgery is usually performed. In the absence of a larynx, tracheoesophageal (TE) voice is the gold standard for alaryngeal phonation. The mechanisms underlying TE voice are unknown, but pharyngoesophageal (PE) segment vibration has been shown to play a key role. The aim of this study was to systematically explore the mechanics of PE segment vibration during TE phonation. A 2D axisymmetric finite-element model with two domains representing the air and PE wall was developed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Amita Sharma, Shaunagh McDermott, Douglas J Mathisen, Jo-Anne O Shepard
BACKGROUND: The purpose of this study was to determine whether computed tomography-guided fiducial placement is a feasible and safe localization procedure to aid resection of small pulmonary nodules. METHODS: A retrospective review was performed of 20 nodules (mean size 11 mm; range, 6 to 19 mm) referred for preoperative computed tomography-guided fiducial placement in 19 patients (average age 64 ± 11 years; 13 women and 6 men). RESULTS: The technical success rate for the placement of fiducials was 95%, with deployment of fiducials into the pleural space in 1 case...
January 25, 2017: Annals of Thoracic Surgery
Brooke Greybeck, Raymond Lu, Arvind Ramanujam, Mary Adeyeye, Matthew Wettergreen, Shari Wynd, Aladin M Boriek
Muscle shortening and volume displacement are critical determinants of the pressure generating capacity of the diaphragm. This study was designed to test the hypothesis that diaphragm volume displacement is heterogeneous and distribution of volume displacement is dependent on regional muscle shortening, posture and level of muscle activation. Radio opaque markers were sutured along muscle bundles of the peritoneal surface of the crural muscle, dorsal costal, mid-costal, and ventral costal regions of the left hemi-diaphragm in four dogs...
January 18, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
T Oshiro, M Donaghy, A Slechta
PURPOSE: To determine if the flipped class format has an effect on examination results for a radiologic technologist (RT) program and discuss benefits from creating video resources. METHODS: From 2001-2015, students had taken both a radiological physics and quality control (QC) class as a part of their didactic training. In 2005/2006, the creation of videos of didactic lectures and QC test demonstrations allowed for a flip where content was studied at home while exercises and reviews were done in-class...
June 2016: Medical Physics
Ricardo Mingarini Terra, Juliano Ribeiro Andrade, Alessandro Wasum Mariani, Rodrigo Gobbo Garcia, Jose Ernesto Succi, Andrey Soares, Paulo Marcelo Zimmer
The concept of a hybrid operating room represents the union of a high-complexity surgical apparatus with state-of-the-art radiological tools (ultrasound, CT, fluoroscopy, or magnetic resonance imaging), in order to perform highly effective, minimally invasive procedures. Although the use of a hybrid operating room is well established in specialties such as neurosurgery and cardiovascular surgery, it has rarely been explored in thoracic surgery. Our objective was to discuss the possible applications of this technology in thoracic surgery, through the reporting of three cases...
September 2016: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
Timm Schäfer, Christian Doose, Buntaro Fujita, Marc Utzenrath, Sandrine Egron, Christoph Schmitz, Smita Scholtz, Maximilian Kütting, Kavous Hakim-Meibodi, Jochen Börgermann, Jan Gummert, Ulrich Steinseifer, Stephan Ensminger
AIMS: The aim of this study was to determine the best functional position of a transcatheter heart valve (THV) implanted as a valve-in-valve (ViV) procedure in small rapid deployment valves (RDV) in an in vitro model. METHODS AND RESULTS: A 21 mm Perceval, Enable or INTUITY RDV was mounted into a pulse duplicator and a 23 mm balloon-expandable or a self-expanding THV was deployed (valve-in-valve) in two different positions. Under physiological hydrodynamic conditions, the performance of the THV was characterised by mean transvalvular pressure gradient (MPG), effective orifice area (EOA) and regurgitation volume (RV)...
February 20, 2017: EuroIntervention
Guillermo Robles, José Manuel Fresno, Romano Giannetti
The design and optimization of protective equipment and devices such as exoskeletons and prosthetics have the potential to be enhanced by the ability of accurately measure the positions of the bones during movement. Existing technologies allow a quite precise measurement of motion-mainly by using coordinate video-cameras and skin-mounted markers-but fail in directly measuring the bone position. Alternative approaches, as fluoroscopy, are too invasive and not usable during extended lapses of time, either for cost or radiation exposure...
September 22, 2016: ISA Transactions
Satoshi Koyama, Kazunori Fujiwara, Tsuyoshi Morisaki, Takahiro Fukuhara, Katsuyuki Kawamoto, Hiroya Kitano, Hiromi Takeuchi
Piriform sinus fistula (PSF) is a rare branchial anomaly that causes repetitive acute suppurative thyroiditis or deep neck abscess. The definitive treatment of PSF is open neck surgery. However, such surgery has a cosmetic problem and a high risk of recurrence. Furthermore, identifying the fistula is difficult due to previous repetitive infections. We report a case of esophageal submucosal abscess caused by PSF treated with endoscopic mucosal incision. The patient underwent transoral video laryngoscopic surgery (TOVS), and endoscopy as well as fluoroscopy revealed complete closure of PSF without any complication...
2016: ORL; Journal for Oto-rhino-laryngology and its related Specialties
Sami Abdel-Jaber, Claudio Belvedere, Jonathan Salvatore De Mattia, Alberto Leardini, Saverio Affatato
A new tendency in the field of wear testing of total knee replacements is represented by realistic simulations of various motor tasks of daily living (chair sitting and rising, squat, stair ascent, etc.). Various studies have shown in fact the limits of the ISO 14243 standards, in particular the concern about the ability of the level walking simulations to recreate the main wear mechanisms which occur on the knee implant during its in vivo lifespan. The recently proposed protocols for the simulation of these motor tasks still lack accuracy and consistency between the various degrees of freedom, which are necessary for a good replication of the mechanical behavior in a replaced knee...
September 6, 2016: Journal of Biomechanics
Rahul Vaidya, Fred Tonnos, Kerellos Nasr, Praveen Kanneganti, Gannon Curtis
OBJECTIVES: The purpose of this video is to describe the equipment, anatomy, and surgical technique of anterior subcutaneous pelvic fixation (INFIX) using pedicle screws and a rod in an Anterior Posterior Compression 3 pelvic fracture, as well as how to distract in lateral compression fractures. METHODS: The equipment required includes standard spine pedicle screw sets with long screws, 70-110 mm in length, and 7 or 8 mm in diameter. The approach is a mini open and one needs to be familiar with the iliac oblique, obturator outlet, and obturator inlet views...
August 2016: Journal of Orthopaedic Trauma
John Tidwell, Rosa Cho, J Spence Reid, Henry Boateng, Carol Copeland, Edward Sirlin
Remembering that preoperative planning, surgical indications, and fracture reduction are paramount for this procedure, presented here is our technique for performing percutaneous sacroiliac screws, both transiliac-transsacral and sacral style. A combination of video, still pictures, and fluoroscopy images will guide the viewer through the process we routinely use highlighting specific details. Patient positioning and intraoperative fluoroscopy imaging are critical to a successful procedure. Although inlet and outlet films remain important, we find the procedure best started on the lateral sacral view to reduce the need for start site, trajectory, and imaging position changes during the case...
August 2016: Journal of Orthopaedic Trauma
Boyle Cheng, Anthony E Castellvi, Reginald J Davis, David C Lee, Morgan P Lorio, Richard E Prostko, Chip Wade
BACKGROUND: While low back pain is one of the most prevalent, if not the most prevalent reasons for visits to physicians, a majority of patients with low back pain cannot be given a definitive diagnosis. While there have been substantial advances in imaging technologies over the past 30 years, relatively little has changed in the methodologies for evaluating functionality of the lumbar spine. The current standard of care for function assessment of the lumbar spine focuses on uncontrolled patient directed motion which results in increased inter-patient variability...
2016: International Journal of Spine Surgery
Torsten Beyna, Harald Farnik, Christoph Sarrazin, Christian Gerges, Horst Neuhaus, Jörg G Albert
BACKGROUND AND STUDY AIMS: Direct retrograde cholangioscopy (DRC) enables high quality video imaging of the bile ducts and allows intraductal treatment with optical control. We evaluated the feasibility, success, and complications of a new third-generation prototype cholangioscope. PATIENTS AND METHODS: All consecutive patients from two tertiary endoscopy centers who had undergone DRC with the prototype were included. Indications for DRC were: evaluation of indeterminate strictures, filling defects, and complex bile duct stones...
October 2016: Endoscopy
Hannah Copeland, Peter B Makdisi, Michael Duncan, Thomas C Wozniak, George Makdisi
A 69-year-old female with a history of a heart transplant 16 years prior, presented with a large left chest mass identified on fluoroscopy in the cardiac catheterization lab. The patient noted a 40 pound weight loss in one year. A chest X-ray (CXR) and chest computed tomography (CT) demonstrated a large complex cystic mass in the left chest. A CT guided aspiration was performed, and the cytology for the cyst fluid was negative for malignancy. The patient continued to have worsening shortness of breath, a repeat chest CT scan and magnetic resonance imaging (MRI) three months later, demonstrated a recurrence of the left pleural mass...
June 2016: Annals of Translational Medicine
Vicente Vanaclocha-Vanaclocha, Francisco Verdú-López, Nieves Sáiz-Sapena, Juan Manuel Herrera, Marlon Rivera-Paz
Chronic pain originating from the sacroiliac joint (SI) can cause severe dysfunction. Although many patients respond to conservative management with NSAIDs, some do need further treatment in the form of SI joint fusion (SIJF). To achieve safe and successful SIJF, intraoperative x-ray fluoroscopy is mandatory to avoid serious damages to nearby vascular and neural structures. Each step of the procedure has to be confirmed by anteroposterior (AP) and lateral projections. With a single-arm x-ray, the arch has to be moved back and forth for the AP and lateral projections, and this lengthens the procedure...
July 2016: Neurosurgical Focus
Bradley J Hindman, Ricardo B Fontes, Robert P From, Vincent C Traynelis, Michael M Todd, Christian M Puttlitz, Brandon G Santoni
OBJECTIVE With application of the forces of intubation, injured (unstable) cervical segments may move more than they normally do, which can result in spinal cord injury. The authors tested whether, during endotracheal intubation, intervertebral motion of an injured C3-4 cervical segment 1) is greater than that in the intact (stable) state and 2) differs when a high- or low-force laryngoscope is used. METHODS Fourteen cadavers underwent 3 intubations using force-sensing laryngoscopes while simultaneous cervical spine motion was recorded with lateral fluoroscopy...
November 2016: Journal of Neurosurgery. Spine
J Michael Johnson, Mohamed R Mahfouz
Osteoarthritis (OA) can alter knee kinematics and stresses. The relationship between cartilage loss in OA and kinematics is unclear, with existing work focusing on static wear and morphology. In this work, femorotibial cartilage maps were coupled with kinematics to investigate the relationship between kinematics and cartilage loss, allowing for more precise treatment and intervention. Cartilage thickness maps were created from healthy and OA subgroups (varus, valgus, and neutral) and mapped to a statistical bone atlas...
June 14, 2016: Journal of Biomechanics
Philip M Bath, Polly Scutt, Jo Love, Pere Clavé, David Cohen, Rainer Dziewas, Helle K Iversen, Christian Ledl, Suzanne Ragab, Hassan Soda, Anushka Warusevitane, Virginie Woisard, Shaheen Hamdy
BACKGROUND AND PURPOSE: Dysphagia is common after stroke, associated with increased death and dependency, and treatment options are limited. Pharyngeal electric stimulation (PES) is a novel treatment for poststroke dysphagia that has shown promise in 3 pilot randomized controlled trials. METHODS: We randomly assigned 162 patients with a recent ischemic or hemorrhagic stroke and dysphagia, defined as a penetration aspiration score (PAS) of ≥3 on video fluoroscopy, to PES or sham treatment given on 3 consecutive days...
June 2016: Stroke; a Journal of Cerebral Circulation
Robert S Glade, Randolph Deal
Velopharyngeal dysfunction (VPD) describes any condition whereby the velopharyngeal valve does not properly close during the production of oral sounds. VPD contains multiple causes, including velopharyngeal mislearning (nasopharyngeal sound substitution for an oral sound), velopharyngeal incompetence (neurolophysiologic dysfunction causing poor pharyngeal movement), and velopharyngeal insufficiency (a structural or anatomic defect prevents velopharyngeal closure). Evaluation for VPD is best performed within the context of a multidisciplinary team and consists of history and physical examination, perceptual speech evaluation, and instrumental assessment of speech with either video nasoendoscopy or multiview speech fluoroscopy...
May 2016: Oral and Maxillofacial Surgery Clinics of North America
Thorbjörn Holmlund, Karl A Franklin, Eva Levring Jäghagen, Marie Lindkvist, Torbjörn Larsson, Carin Sahlin, Diana Berggren
OBJECTIVES/HYPOTHESIS: To study whether tonsillectomy is effective on obstructive sleep apnea (OSA) in adults with large tonsils. STUDY DESIGN: A multicenter prospective interventional study. METHODS: The study comprised 28 patients with OSA, an apnea-hypopnea index of > 10, large tonsils (Friedman tonsil size 3 and 4), and age 18 to 59 years. They were derived from 41 consecutive males and females with large tonsils referred for a suspicion of sleep apnea to the ear, nose, and throat departments in Umeå, Skellefteå, and Sunderbyn in northern Sweden...
December 2016: Laryngoscope
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