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https://www.readbyqxmd.com/read/28058967/the-value-of-computed-tomography-in-detecting-distal-radio-ulnar-joint-instability-after-a-distal-radius-fracture
#1
R H van Leerdam, M M E Wijffels, M Reijnierse, W Stomp, P Krijnen, I B Schipper
: This study evaluated the value of computed tomography scans for the diagnosis of distal radioulnar joint instability. A total of 46 patients, conservatively treated for a unilateral distal radius fracture, were evaluated. Clinical instability was tested using the stress test and clunk test. A computed tomography scan of both wrists was performed in pronation and supination. Two independent observers reviewed the computed tomography scans using: the radioulnar line, subluxation ratio, epicentre and radioulnar ratio methods...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28048556/tu-h-campus-tep3-03-dose-enhancement-by-gold-nanoparticles-around-the-bragg-peak-of-proton-beams
#2
J Kwon, K Sutherland, T Hashimoto, H Peng, L Xing, H Shirato, H Date
PURPOSE: To make clear the spatial distribution of dose enhancement around gold nanoparticles (GNPs) located near the proton Bragg peak, and to evaluate the potential of GNPs as a radio sensitizer. METHODS: The dose enhancement by electrons emitted from GNPs under proton irradiation was estimated by Geant4 Monte Carlo simulation toolkit in two steps. In an initial macroscopic step, 100 and 195 MeV proton beams were incident on a water cube, 30 cm on a side. Energy distributions of protons were calculated at four depths, 50% and 75% proximal to the Bragg peak, 100% peak, and 75% distal to the peak (P50, P75, Peak, and D75, respectively)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27932401/medium-to-long-term-outcomes-of-anatomical-reconstruction-of-the-radioulnar-ligament-to-the-ulnar-fovea
#3
T Nakamura, K Abe, M Nishiwaki, T Iwamoto, K Sato
: We examined the medium- to long-term outcome of the original reconstruction technique of the radioulnar ligament using a half-slip of the extensor carpi ulnaris tendon for chronic foveal avulsion of the triangular fibrocartilage complex. We treated 37 wrists in 36 patients with a minimum follow-up of 5 years. Of 36 patients, 12 had more than 10 years follow-up. At final follow-up, 30 patients (31 wrists) reported no pain, five patients (five wrists) reported mild occasional pain and one patient reported severe persistent pain...
December 8, 2016: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/27890214/-pathology-of-the-triangular-fibrocartilaginous-complex-in-distal-radius-fractures
#4
D Fontès
Distal radius fracture is actually quite rarely isolated and triangular fibrocartilaginous complex (TFCC) is often involved with the same mechanism of injury. A contemporary management of the treatment of the initial fracture is ideal and so benefits from a routine arthroscopic management. Nevertheless, in the absence of diagnosis and therefore early treatment, the symptoms may be located at the ulnar crossroads and justify specific treatment of TFCC. It is generally conducted after an accurate arthroscopic lesion classification guiding a procedure, depending on the lesion vascularization as well as its possible destabilization potential (debridement, capsular suture or foveal reattachment)...
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27890208/-descriptive-radiographic-topographic-and-functional-anatomy-applied-to-distal-radius-fractures
#5
C Fontaine, R Bry, P Laronde, E Guerre, A Aumar
Extensive anatomical knowledge is needed in order to correctly treat distal radius fractures: normal and pathological osteology of the distal radius, distal radio-ulnar joint and radiocarpal joint-both on the descriptive and functional level-the neurovascular and muscular environments of the distal radius-which are essential to the surgical approaches-and the angles that need to be restored during the reduction. All of these concepts are broached in this article.
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27856939/magnetic-resonance-imaging-investigation-of-radio-lunate-relations-use-in-assessing-distal-radial-fracture-reduction
#6
G Medlock, J M Wohlgemut, I M Stevenson, A J Johnstone
: Reformatted magnetic resonance imaging scans of 27 normal wrists were examined in incremental degrees of rotation around the central axis of the radial shaft to 30° in both directions from true lateral. A line was superimposed on the outer border of the radial dorsal cortex and continued distally to the carpal region. Measurements were made from the superior pole of the lunate to this line. This distance did not change significantly with rotation. This allows a quick and accurate way of assessing distal radial fracture reduction from poorly taken lateral radiographs...
November 16, 2016: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/27852665/sensory-nerve-supply-of-the-distal-radio-ulnar-joint-with-regard-to-wrist-denervation
#7
G M Hohenberger, M J Maier, C Dolcet, A H Weiglein, A Schwarz, V Matzi
The objective of this study was to determine the precise departure points of the articular branches innervating the distal radio-ulnar joint from the anterior and posterior interosseous nerves. The study sample consisted of 116 upper limbs from adult human cadavers. The articular branches were prepared under the dissection microscope to take measurements using the radial styloid process as point of reference. The articular branch departed from the anterior interosseous nerve at a mean distance of 2.9 cm proximal to the styloid for a radius length of 20...
November 15, 2016: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/27806844/myxoid-liposarcoma-of-the-foot-a-study-of-8-cases
#8
Elise M Bekers, Wangzhao Song, Albert J H Suurmeijer, Johannes J Bonenkamp, Ingrid C van der Geest, Petra M Braam, Marieke J M Ploegmakers, Ingrid M E Desar, Bastiaan B J Tops, Joost M van Gorp, David H Creytens, Thomas Mentzel, Uta Flucke
INTRODUCTION: Myxoid liposarcoma is the only translocation-associated liposarcoma subtype. It classically originates in the deep soft tissues of the thigh. At distal sites of the extremities, this tumor is exceedingly rare. We present a series of 8 cases occurring in the foot/ankle. RESULTS: Two female and 6 male patients, aged between 32 and 77 years (mean, 54.3 years), were identified. Tumor size ranged from 1.1 to 10 cm (mean, 6.8 cm). Two lesions eroded bone...
December 2016: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/27806538/epidemiology-of-the-upper-extremity-trauma-in-a-traumatic-center-in-iran
#9
Maryam Ameri, Kamran Aghakhani, Ebrahim Ameri, Shahrokh Mehrpisheh, Azadeh Memarian
INTRODUCTION: Orthopedic injuries are the most common types of traumatic injuries and present as fractures of the limbs, pelvis, and vertebrae or lesions in soft tissues, muscles, ligaments, and tendons. The upper limb fractures occur in distal radius and ulna, metacarpals, fingers, scapula, and carpal bones, Proximal, diaphysis, distal humerus, clavicle, proximal ulna and radio and distal humero and humero, radio, ulna, and metacarpo. The objective of this project was to accurately describe the occurrence of injuries of the upper extremity and the mechanisms of such injuries in a representative sample of Iranian population...
August 10, 2016: Global Journal of Health Science
https://www.readbyqxmd.com/read/27779135/an-end-to-end-assessment-of-range-uncertainty-in-proton-therapy-using-animal-tissues
#10
Yuanshui Zheng, Yixiu Kang, Omar Zeidan, Niek Schreuder
Accurate assessment of range uncertainty is critical in proton therapy. However, there is a lack of data and consensus on how to evaluate the appropriate amount of uncertainty. The purpose of this study is to quantify the range uncertainty in various treatment conditions in proton therapy, using transmission measurements through various animal tissues. Animal tissues, including a pig head, beef steak, and lamb leg, were used in this study. For each tissue, an end-to-end test closely imitating patient treatments was performed...
November 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27735063/the-effect-of-sliding-humeral-osteotomy-sho-on-frontal-plane-thoracic-limb-alignment-an-ex-vivo-canine-cadaveric-study
#11
Adam H Breiteneicher, Bo Norby, Kurt S Schulz, Sharon C Kerwin, Don A Hulse, Derek B Fox, W Brian Saunders
OBJECTIVE: To determine the effect of sliding humeral osteotomy (SHO) on frontal plane thoracic limb alignment in standing and recumbent limb positions. STUDY DESIGN: Canine cadaveric study. SAMPLE POPULATION: Canine thoracic limbs (n=15 limb pairs). METHODS: Limbs acquired from healthy Labrador Retrievers euthanatized for reasons unrelated to this study were mounted in a limb press and aligned in a standing position followed by axial loading at 30% body weight...
October 13, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27717996/a-comparison-of-efficacy-of-doxazosin-4-and-8%C3%A2-mg-in-medical-expulsive-therapy-of-distal-ureteral-stones-a-prospective-randomized-clinical-trial
#12
Haluk Sen, Sakip Erturhan, Erkan Sadioglu, Omer Bayrak, İlker Seckiner
We aimed to investigate the efficacy of two different doses of doxazosin, 4 and 8 mg, in medical expulsive therapy (MET). This prospective randomized study included a total of 66 patients with distal ureteral stones which were radio-opaque and ≤10 mm. All patients were randomly divided into three groups: Group 1 included 25 patients receiving 4 mg doxazosin. Group 2 included 22 patients receiving 8 mg doxazosin. Diclofenac 100 mg p.o. and daily 1500-2000 cc hydration were advised to the patients in Groups 1 and 2 to relieve pain...
October 7, 2016: Urolithiasis
https://www.readbyqxmd.com/read/27716829/analysis-of-microstructure-of-the-cardiac-conduction-system-based-on-three-dimensional-confocal-microscopy
#13
Daniel Romero, Oscar Camara, Frank Sachse, Rafael Sebastian
The specialised conducting tissues present in the ventricles are responsible for the fast distribution of the electrical impulse from the atrio-ventricular node to regions in the subendocardial myocardium. Characterisation of anatomical features of the specialised conducting tissues in the ventricles is highly challenging, in particular its most distal section, which is connected to the working myocardium via Purkinje-myocardial junctions. The goal of this work is to characterise the architecture of the distal section of the Purkinje network by differentiating Purkinje cells from surrounding tissue, performing a segmentation of Purkinje fibres at cellular scale, and mathematically describing its morphology and interconnections...
2016: PloS One
https://www.readbyqxmd.com/read/27697137/cancer-of-the-upper-rectum
#14
Peter Bondeven
Rectal cancer constitutes one-third of all colorectal cancers, and the incidence in Denmark increasing. In 2012, 1.400 cases were registered, and of these 38% were located in the upper rectum. There have been several key advances in the optimal management of rectal cancer during the past decades, primarily by standardisation and improvement of the surgical procedure. There is now general agreement that the optimal surgical treatment involves the concept of total mesorectal excision and that a resection with tumour-free margins is crucial...
October 2016: Danish Medical Journal
https://www.readbyqxmd.com/read/27688037/hydrodisplacement-of-sural-nerve-for-safety-and-efficacy-of-endovenous-thermal-ablation-for-small-saphenous-vein-incompetence
#15
Omar Rodriguez-Acevedo, Kristen E Elstner, Kui Martinic, Aaron Zea, Jenny Diaz, Rodrigo T Martins, Fernando Arduini, Alexandra Hodgkinson, Nabeel Ibrahim
BACKGROUND: Endovenous radio frequency ablation for small saphenous vein incompetence by and large appears to be superior and safer than conventional open surgery. Small saphenous vein ablation from approximately mid-calf to the point proximally where the small saphenous vein dives into the popliteal fossa is considered to be safe, as the sural nerve is in most cases separated from this segment of the small saphenous vein by the deep fascia. The outcome of the distal incompetent small saphenous vein remains unclear...
September 29, 2016: Phlebology
https://www.readbyqxmd.com/read/27682030/clinical-anatomy-of-the-cavotricuspid-isthmus-and-terminal-crest
#16
Wiesława Klimek-Piotrowska, Mateusz K Hołda, Mateusz Koziej, Jakub Hołda, Katarzyna Piątek, Kamil Tyrak, Filip Bolechała
The aim of this study was to provide useful information about the cavotricuspid isthmus (CTI) and surrounding areas morphology, which may help to plan CTI radio-frequency ablation. We examined 140 autopsied human hearts from Caucasian individuals of both sexes (29.3% females) with a mean age of 49.1±17.2 years. We macroscopically investigated the lower part of the right atrium, the CTI, the inferior vena cava ostium and the terminal crest. The paraseptal isthmus (18.5±4.0 mm) was significantly shorter than the central isthmus (p<0...
2016: PloS One
https://www.readbyqxmd.com/read/27663505/the-gastric-acid-pocket-is-attenuated-in-h-pylori-infected-subjects
#17
David R Mitchell, Mohammad H Derakhshan, Angela A Wirz, Clare Orange, Stuart A Ballantyne, James J Going, Kenneth E L McColl
OBJECTIVE: Gastric acid secretory capacity in different anatomical regions, including the postprandial acid pocket, was assessed in Helicobacter pylori positive and negative volunteers in a Western population. DESIGN: We studied 31 H. pylori positive and 28 H. pylori negative volunteers, matched for age, gender and body mass index. Jumbo biopsies were taken at 11 predetermined locations from the gastro-oesophageal junction and stomach. Combined high-resolution pH metry (12 sensors) and manometry (36 sensors) was performed for 20 min fasted and 90 min postprandially...
September 23, 2016: Gut
https://www.readbyqxmd.com/read/27648086/clinical-implementation-of-a-novel-applicator-in-high-dose-rate-brachytherapy-treatment-of-esophageal-cancer
#18
Ivan M Buzurovic, Jorgen L Hansen, Mandar S Bhagwat, Desmond A O'Farrell, Scott Friesen, Thomas C Harris, Antonio L Damato, Robert A Cormack, Neil E Martin, Phillip M Devlin
PURPOSE: In this study, we present the clinical implementation of a novel transoral balloon centering esophageal applicator (BCEA) and the initial clinical experience in high-dose-rate (HDR) brachytherapy treatment of esophageal cancer, using this applicator. MATERIAL AND METHODS: Acceptance testing and commissioning of the BCEA were performed prior to clinical use. Full performance testing was conducted including measurements of the dimensions and the catheter diameter, evaluation of the inflatable balloon consistency, visibility of the radio-opaque markers, congruence of the markers, absolute and relative accuracy of the HDR source in the applicator using the radiochromic film and source position simulator, visibility and digitization of the applicator on the computed tomography (CT) images under the clinical conditions, and reproducibility of the offset...
August 2016: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/27628434/longitudinal-instability-of-the-forearm
#19
J Phadnis, A C Watts
The Essex Lopresti lesion is a rare triad of injury to the radial head, interosseous membrane of the forearm and distal radio-ulnar joint, which results in longitudinal instability of the radius. If unrecognized this leads to chronic pain and disability which is difficult to salvage. Early recognition and appropriate treatment is therefore desirable to prevent long-term problems. The aim of this article is to review the pathoanatomy of longitudinal radius instability and use the existing literature and authors' experience to provide recommendations for recognition and treatment of acute and chronic forearm instability, including description of the author's technique for interosseous membrane reconstruction...
October 2016: Der Orthopäde
https://www.readbyqxmd.com/read/27605033/thin-film-based-semi-active-resonant-marker-design-for-low-profile-interventional-cardiovascular-mri-devices
#20
Engin Baysoy, Dursun Korel Yildirim, Cagla Ozsoy, Senol Mutlu, Ozgur Kocaturk
OBJECTIVES: A new microfabrication method to produce low profile radio frequency (RF) resonant markers on catheter shafts was developed. A semi-active RF resonant marker incorporating a solenoid and a plate capacitor was constructed on the distal shaft of a 5 Fr guiding catheter. The resulting device can be used for interventional cardiovascular MRI procedures. MATERIALS AND METHODS: Unlike current semi-active device visualization techniques that require rigid and bulky analog circuit components (capacitor and solenoid), we fabricated a low profile RF resonant marker directly on guiding the catheter surface by thin film metal deposition and electroplating processes using a modified physical vapor deposition system...
September 7, 2016: Magma
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