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https://www.readbyqxmd.com/read/29776470/clinical-outcomes-of-anconeus-interposition-arthroplasty-after-radial-head-resection-in-native-and-prosthetic-radial-heads
#1
Hithem Rahmi, Julie A Neumann, Christopher Klein, Carola F van Eck, Brian K Lee, John Itamura
BACKGROUND: Radiocapitellar pathology after traumatic injury to the elbow can be challenging to treat. The anconeus interposition arthroplasty has been proposed to treat radiocapitellar or proximal radioulnar joint dysfunction and pain, or both. This study evaluated whether radial head excision (native or prosthetic), followed by an anconeus interposition arthroplasty, relieves pain and improves subjective and objective elbow function in patients with post-traumatic radiocapitellar pathology...
June 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29727407/three-dimensional-mri-analysis-of-femoral-head-remodeling-after-reduction-in-patients-with-developmental-dysplasia-of-the-hip
#2
Yuta Tsukagoshi, Hiroshi Kamada, Makoto Kamegaya, Ryoko Takeuchi, Shogo Nakagawa, Yohei Tomaru, Kenta Tanaka, Mio Onishi, Tomofumi Nishino, Masashi Yamazaki
BACKGROUND: Previous reports on patients with developmental dysplasia of the hip (DDH) showed that the prereduced femoral head was notably smaller and more nonspherical than the intact head, with growth failure observed at the proximal posteromedial area. We evaluated the shape of the femoral head cartilage in patients with DDH before and after reduction, with size and sphericity assessed using 3-dimensional (3D) magnetic resonance imaging (MRI). METHODS: We studied 10 patients with unilateral DDH (all female) who underwent closed reduction...
May 2, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29713746/the-treatment-of-chronic-radial-head-dislocation-in-monteggia-fracture-without-annular-ligament-reconstruction
#3
Hsuan-Yu Chen, Kuan-Wen Wu, Zheng-Ren Dong, Shier-Chieg Huang, Ken N Kuo, Ting-Ming Wang
INTRODUCTION: The treatment of neglected radial head dislocation after missed Monteggia fracture dislocation in children is a controversial issue. The purpose of this study is to report our clinical experience in the treatment of the condition without annular ligament reconstruction. METHOD: This is a retrospective review of 20 patients between 2008 and 2014. Procedures included open reduction of the radial head and ulnar lengthening angulation osteotomy. In cases of unstable radial head reduction, a trans-capitellar K wire was applied...
May 1, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29709352/radial-head-fracture-fixation-using-tripod-technique-with-headless-compression-screws
#4
REVIEW
Marc D Lipman, Trenton M Gause, Victor A Teran, A Bobby Chhabra, D Nicole Deal
Radial head and neck fractures are one of the most common elbow fractures, comprising 2% to 5% of all fractures, and 30% of elbow fractures. Although uncomplicated Mason type I fractures can be managed nonsurgically, Mason type II-IV fractures require additional intervention. Mason type II-III fractures with 3 or fewer fragments are typically treated with open reduction and internal fixation using 2 to 3 lag screws. Transverse radial neck involvement or axial instability with screw-only fixation has historically required the additional use of a mini fragment T-plate or locking proximal radius plate...
April 27, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29685388/the-contribution-of-the-posterolateral-capsule-to-elbow-joint-stability-a-cadaveric-biomechanical-investigation
#5
Dafydd S Edwards, Mohammed S Arshad, Toni Luokkala, Angela E Kedgley, Adam C Watts
BACKGROUND: Elbow posterolateral rotatory instability occurs after an injury to the lateral collateral ligament complex (LCLC) in isolation or in association with an osteochondral fracture of the posterolateral margin of the capitellum (Osborne-Cotterill lesion [OCL]). The contribution to elbow stability of the posterolateral capsule, attached to this lesion, is unknown. This study quantified the displacement of the radial head on simulated posterior draw with sectioning of the posterior capsule (a simulated OCL) or LCLC...
April 20, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29682800/an-analytic-expression-for-the-ultimate-intrinsic-snr-in-a-uniform-sphere
#6
Hong-Hsi Lee, Daniel K Sodickson, Riccardo Lattanzi
PURPOSE: The ultimate intrinsic signal-to-noise ratio (UISNR) is normally calculated using electrodynamic simulations with a complete basis of modes. Here, we provide an exact solution for the UISNR at the center of a dielectric sphere and assess how accurately this solution approximates UISNR away from the center. METHODS: We performed a mode analysis to determine which modes contribute to central UISNR - ζ(r→0). We then derived an analytic expression to calculate ζ(r→0) and analyzed its dependence on main magnetic field strength, sample geometry, and electrical properties...
April 22, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29679731/changes-in-pediatric-dxa-measures-of-musculoskeletal-outcomes-and-correlation-with-quantitative-ct-following-treatment-of-acute-lymphoblastic-leukemia
#7
Sogol Mostoufi-Moab, Andrea Kelly, Jonathan A Mitchell, Joshua Baker, Babette S Zemel, Jill Brodsky, Jin Long, Mary B Leonard
We previously reported significant gains in pQCT measures of tibia trabecular bone mineral density (BMD) and cortical structure following completion of therapy in children and adolescents with acute lymphoblastic leukemia (ALL). The objective of this study was to examine changes in DXA measures used in clinical practice and expressed as Z-scores using robust national reference data. Children and adolescents, ages 5 to 18 years were enrolled within 2 (median 0.8) years of completing ALL therapy. DXA total-body less-head bone mineral content (TBLH-BMC), and spine, total hip, femoral neck, and 1/3rd radius areal BMD (aBMD) were assessed in 45 participants at enrollment and 12-months later...
April 18, 2018: Bone
https://www.readbyqxmd.com/read/29668582/bilateral-visual-loss-and-cerebral-infarction-after-spleen-embolization-in-a-trauma-patient-with-idiopathic-thrombocytopenic-purpura-a-case-report
#8
Wei-Ting Wang, Yu-Yu Li, Wan-Ching Lin, Jen-Yin Chen, Kuo-Mao Lan, Cheuk-Kwan Sun, Kuo-Chuan Hung
RATIONALE: Splenic artery embolization (SAE) is a common procedure in trauma patients with blunt splenic injuries. We report a case of acute ischemic stroke following orthopedic surgery in a patient with post-SAE reactive thrombocytosis. PATIENT CONCERNS: A 37-year-old woman with idiopathic thrombocytopenic purpura (ITP) suffered from multiple trauma scheduled for open reduction and internal fixation for right tibial and left radius fracture five days after SAE...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29666688/synovial-haemangioma-of-the-elbow-a-rare-paediatric-case-and-imaging-dilemma
#9
Han G Hoe, Faizah M Zaki, Abdul H A Rashid
Synovial haemangiomas are rare benign vascular proliferations arising in synovium-lined surfaces. While the knee is by far the joint most commonly involved, this condition can also occur in the elbow. We report an eight-year-old boy who presented to the National University of Malaysia Medical Centre, Kuala Lumpur, Malaysia, in 2016 with a left elbow swelling of one year's duration. Magnetic resonance imaging showed a lobulated intra-articular mass with intermediate signal intensity on T1-weighted imaging and low signal punctate and linear structures within the hyperintense mass on T2-weighted imaging...
February 2018: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/29659886/bone-parameters-in-anorexia-nervosa-and-athletic-amenorrhea-comparison-of-two-hypothalamic-amenorrhea-states
#10
Nurgun Kandemir, Meghan Slattery, Kathryn E Ackerman, Shreya Tulsiani, Amita Bose, Vibha Singhal, Charumathi Baskaran, Seda Ebrahimi, Mark Goldstein, Kamryn Eddy, Anne Klibanski, Madhusmita Misra
Purpose: We have reported low bone mineral density (BMD), impaired bone structure, and increased fracture risk in anorexia nervosa (AN) and normal-weight, oligo-amenorrheic athletes (OA). However, data directly comparing compartment-specific bone parameters in AN, OA and controls are lacking. Methods: 426 females 14-21.9 years old were included; 231 AN, 94 OA and 101 normal-weight eumenorrheic controls. Dual energy x-ray absorptiometry was used to assess areal BMD (aBMD) of the whole body less head (WBLH), spine, and hip...
April 5, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29651839/the-functionalization-pattern-of-graphene-oxide-sheets-controls-entry-or-produces-lipid-turmoil-in-phospholipid-membranes
#11
Marco Dallavalle, Andrea Bottoni, Matteo Calvaresi, Francesco Zerbetto
Molecular dynamics, coarse-grained to the level of hydrophobic and hydrophilic interactions, shows that graphene oxide sheets, GOS, can pierce through the phospholipid membrane and navigate the double layer only if the hydrophilic groups are randomly dispersed in the structure. Their behavior resembles that found in similar calculations for pristine graphene sheets. If the oxidation is located at the edge of the sheets, GOS hover over the membrane and trigger a major re-organization of the lipids. The re-organization is largest when the radius of the edge-functionalized sheet is similar to the length of the lipophilic chain of the lipid...
April 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29649306/single-camera-multi-view-anthropometric-measurement-of-human-height-and-mid-upper-arm-circumference-using-linear-regression
#12
Yingying Liu, Arcot Sowmya, Heba Khamis
BACKGROUND: Manually measured anthropometric quantities are used in many applications including human malnutrition assessment. Training is required to collect anthropometric measurements manually, which is not ideal in resource-constrained environments. Photogrammetric methods have been gaining attention in recent years, due to the availability and affordability of digital cameras. OBJECTIVE: The primary goal is to demonstrate that height and mid-upper arm circumference (MUAC)-indicators of malnutrition-can be accurately estimated by applying linear regression to distance measurements from photographs of participants taken from five views, and determine the optimal view combinations...
2018: PloS One
https://www.readbyqxmd.com/read/29619502/safe-zone-for-the-posterior-interosseous-nerve-with-regard-to-the-lateral-and-posterior-approaches-to-the-proximal-radius
#13
Gloria Maria Hohenberger, Angelika Maria Schwarz, Marco Johannes Maier, Peter Grechenig, Jan Dauwe, Christoph Grechenig, Renate Krassnig, Axel Gänsslen, Andreas Heinrich Weiglein
PURPOSE: The posterior interosseous nerve (PIN) is at risk during the posterior and lateral approaches to the proximal radius. We aimed to define a safe zone for these approaches to avoid injury of the PIN and to evaluate their close and changing relationship to the nerve during forearm rotation. METHODS: The study collective consisted of 50 upper limbs. After performance of the lateral approach, the distance between the tip of the radial head and the PIN's exit point from the supinator (= distance 1) and the shortest interval between the nerve's exit to the radial margin of the ulna (= distance 2) were measured in maximum pronation and supination...
April 4, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29618419/proximal-row-carpectomy-using-decellularized-dermal-allograft
#14
REVIEW
Remy V Rabinovich, Steven J Lee
Wrist arthritis is a common problem. When managed early, motion-sparing procedures can be performed with successful outcomes. Proximal row carpectomy (PRC) has demonstrated good functional results and high patient satisfaction with up to 20-year follow-up. The majority of patients with longer follow-up have, however, exhibited radiographic signs of progressive degeneration of the radiocapitate space. Although radiographic changes have not been shown to correlate with wrist pain and function, it remains a concern and questions the durability of the radiocapitate articulation with continued patient follow-up, especially those who underwent the original procedure at a younger age...
April 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29602655/correlation-of-the-lateral-wrist-radiograph-to-ulnar-variance-a-cadaveric-study
#15
Derek T Bernstein, Joshua D Linnell, Nancy J Petersen, David T Netscher
PURPOSE: Both positive and negative ulnar variance have been implicated in a variety of wrist disorders. Surgery aims to correct the variance in these pathologic conditions. This necessitates accurate and reproducible measuring tools; however, the most accurate radiographic measurement technique remains unclear. The purposes of this study were to evaluate 3 methods for determining ulnar variance and to compare each with direct anatomic measurement in a cadaver model. METHODS: We fixed 10 fresh above-elbow cadaver specimens in neutral rotation and obtained standardized fluoroscopic posteroanterior and lateral wrist images...
March 27, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29592988/paediatric-forearm-fracture-with-a-twist-a-proximal-radioulnar-translocation-combined-with-radial-head-fracture
#16
Femke Nawijn, Benjamin Lucas Emmink, Jort Keizer, Willem-Maarten Bosman
A 10-year-old girl presented to the emergency department with proximal radioulnar translocation and radial head fracture, after fall onto an outstretched hand. Open reduction was used to reduce and stabilise the elbow joint after which the radial head was fixated by Kirschner wires. Three months after surgery, full range of motion was regained and union of the radial head was achieved. Proximal radioulnar translocation is a rare injury which is often missed on initial radiographs. Persistent restriction of forearm rotation with seemingly normal elbow configuration must trigger to take a closer look at the relationship between the ulna, radius and distal humerus...
March 28, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29580346/head-ct-before-transfer-does-not-decrease-time-to-craniotomy-for-tbi-patients
#17
Peter M Tonui, Sarah K Spilman, Carlos A Pelaez, Mark R Mankins, Richard A Sidwell
Rural trauma education emphasizes that radiologic imaging should be discouraged if it delays transfer to definitive care. With increased capacity for image sharing, however, radiography obtained at referring hospitals (RH) could help providers at trauma centers (TC) prepare for patients with traumatic brain injury. We evaluated whether a head CT prior to transfer accelerated time to neurosurgical intervention at the TC. The study was conducted at a combined adult Level I and pediatric Level II TC with a catchment area that includes rural hospitals within a 150 mile radius...
February 1, 2018: American Surgeon
https://www.readbyqxmd.com/read/29576923/ulnar-lengthening-reconstruction-of-interosseous-membrane-in-treatment-of-osteochondroma
#18
Marcio Aurelio Aita, Fabio Lucas Rodrigues, Rodrigo Montemor Bernardo, Daniel Rebolledo, Danilo Barronovo, Gustavo Mantovanni Ruggiero
Background:  We aim to measure the quality of life and clinical and functional outcomes of a patient who had undergone ligament reconstruction of the forearm interosseous membrane, using brachioradialis tendon more ulna distraction osteogenesis in treatment with multiple cartilaginous exostosis. Case Description:  We present a 11-year-old boy with congenital deformity in his right, dominant forearm,Type IIb by Masada classification. Distraction of the ulna, resection of exostosis, and reconstruction of the distal part of the interosseous membrane was performed...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29564051/where-is-the-ulnar-styloid-process-identification-of-the-absolute-location-of-the-ulnar-styloid-process-based-on-ct-and-verification-of-neutral-forearm-rotation-on-lateral-radiographs-of-the-wrist
#19
Seung-Han Shin, Yong-Suk Lee, Jin-Woo Kang, Dong-Young Noh, Joon-Yong Jung, Yang-Guk Chung
Background: The location of the ulnar styloid process can be confusing because the radius and the hand rotate around the ulna. The purpose of this study was to identify the absolute location of the ulnar styloid process, which is independent of forearm pronation or supination, to use it as a reference for neutral forearm rotation on lateral radiographs of the wrist. Methods: Computed tomography (CT) images of 23 forearms taken with elbow flexion of 70° to 90° were analyzed...
March 2018: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29533651/coarse-grain-molecular-dynamics-simulations-to-investigate-the-bulk-viscosity-and-critical-micelle-concentration-of-the-ionic-surfactant-sodium-dodecyl-sulfate-sds-in-aqueous-solution
#20
Yosadara Ruiz-Morales, Ascención Romero-Martínez
The first critical micelle concentration (CMC) of the ionic surfactant sodium dodecyl sulfate (SDS) in diluted aqueous solution has been determined at room temperature from the investigation of the bulk viscosity, at several concentrations of SDS, by means of coarse-grain molecular dynamics simulations. The coarse-grained model molecules at the mesoscale level are adopted. The bulk viscosity of SDS was calculated at several millimolar concentrations of SDS in water using the MARTINI force field by means of NVT shear Mesocite molecular dynamics...
April 12, 2018: Journal of Physical Chemistry. B
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