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Olecranon

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https://www.readbyqxmd.com/read/29223632/comparative-morbidity-of-cubital-tunnel-surgeries-a-prospective-cohort-study
#1
Robert Staples, Dan London, Agnes Z Dardas, Charles A Goldfarb, Ryan P Calfee
PURPOSE: Randomized controlled trials have not identified a superior surgical approach to cubital tunnel syndrome surgery. This study evaluates the early morbidity of open in situ decompression and transposition. METHODS: This prospective cohort study enrolled 125 adult patients indicated for cubital tunnel surgery at a tertiary institution. Exclusion criteria included preoperative use of narcotics and concurrent elbow procedures. In situ decompressions (n = 47) and ulnar nerve transpositions (n = 78) were performed...
December 6, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29195898/outcomes-of-displaced-olecranon-fractures-treated-with-the-olecranon-sled
#2
Andrew J Lovy, Isaiah Levy, Aakash Keswani, Todd Rubin, Michael R Hausman
BACKGROUND: Tension-band wiring is largely considered the gold standard for fixation of displaced olecranon fractures despite high rates of hardware complications. The purpose of this study was to report the outcomes of displaced olecranon fractures treated with the Olecranon Sled. METHODS: We retrospectively reviewed all displaced olecranon fractures from 2011-2015 treated with the Olecranon Sled. Inclusion was limited to functionally independent patients with Mayo type II fractures and minimum 12-month follow-up...
November 28, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29193820/osteology-and-radiological-anatomy-of-the-thoracic-limbs-of-temminck-s-ground-pangolin-smutsia-temminckii
#3
Christine Steyn, John T Soley, Martina R Crole
Temminck's ground pangolin is the only pangolin present in South Africa. It is a myrmecophagous mammal with a bipedal gait. The thoracic limbs are used to break open ant nests, dig for food and expand previously occupied burrows. This study describes the osteology and radiological anatomy of the thoracic limbs of this threatened species. Thoracic limbs from four Temminck's ground pangolins, which succumbed from electrocution or natural causes, were digitally radiographed in situ. The individual bones were then cleaned, described and digitally radiographed...
November 28, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29162306/osteosynthesis-of-ao-ota-13-c3-distal-humeral-fractures-in-patients-older-than-70-years
#4
Steven F Shannon, Eric R Wagner, Matthew T Houdek, Daniel Mascarenhas, Raymond A Pensy, Walter A Eglseder
OBJECTIVE: The purpose of this retrospective case series was to examine the AO Foundation and Orthopaedic Trauma Association (AO/OTA) 13-C3 distal humeral fractures treated with open reduction-internal fixation (ORIF) in patients older than 70 years. METHODS: During an 8-year period, 21 patients older than 70 years with AO/OTA 13-C3 distal humeral fractures were treated with ORIF performed by 2 senior upper extremity traumatologists. There were 16 patients with >1 year of follow-up, with a mean age of 78 (70-84) years...
November 18, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29152182/selective-regimes-and-functional-anatomy-in-the-mustelid-forelimb-diversification-toward-specializations-for-climbing-digging-and-swimming
#5
Brandon M Kilbourne
Anatomical traits associated with locomotion often exhibit specializations for ecological niche, suggesting that locomotor specializations may constitute selective regimes acting on limb skeletal traits. To test this, I sampled 42 species of Mustelidae, encompassing climbing, digging, and swimming specialists, and determined whether trait variation reflects locomotor specialization by performing a principal components analysis on 14 forelimb traits. In addition to Brownian motion models, three Ornstein-Uhlenbeck models of selective regimes were applied to PC scores describing trait variation among mustelids: one without a priori defined phenotypic optima, one with optima based upon locomotor habit, and one with a single phenotypic optimum...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29127918/management-of-type-iib-and-iiib-olecranon-fractures-case-series
#6
Mohammed Ali, Catherine Hatzantonis, Dimitrios Aspros, Nirad Joshi, D I Clark, Amol Tambe
OBJECTIVES: to report and evaluate the functional outcome of plate fixation in comminuted olecranon fractures (Mayo types IIB and IIIB). METHOD: 23 consecutive patients with comminuted fractures of the olecranon presenting to our unit Between Feb 2011 and Jan 2015, at a mean follow-up of thirty-six months. Main outcome measurements include radiographic healing, post-operative range of motion, complications, outcome score and patient satisfaction. RESULTS: Our study included thirteen females and ten males with a mean age of 55(18-97)...
November 6, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29118644/morphology-of-the-limbs-in-the-semi-fossorial-desert-rodent-species-of-tympanoctomys-octodontidae-rodentia
#7
M Julieta Perez, Ruben M Barquez, M Monica Diaz
Here, a detailed description of the forelimbs and hindlimbs of all living species of the genus Tympanoctomys are presented. These rodents, highly adapted to desert environments, are semi-fossorial with capacity to move on the surface as well as to build burrows. The shape, structure, and size of the limbs are described. Contrary to what was expected for scratch digging semi-fossorial species, Tympanoctomys have slender humerus, radius and ulna; with narrow epicondyles of the humerus and short olecranon of the ulna with poorly developed processes...
2017: ZooKeys
https://www.readbyqxmd.com/read/29117836/compressive-ulnar-neuropathy-caused-by-olecranon-bursitis-and-concomitant-epidermal-cyst-a-case-report
#8
Hiroshi Yamazaki, Michitaka Shinone, Hiroyuki Kato
Epidermal cyst is a dermal or subcutaneous epithelial cyst that contains keratin and is lined by true epidermis. Although extremely rare, it can cause pathology including nerve compression syndrome. We report a rare case of ulnar nerve compression in the elbow that was caused by olecranon bursitis and concomitant epidermal cyst in a 67-year-old man. The ulnar nerve was immediately adjacent to the olecranon bursa and was significantly compressed. There was no connection between the tumor and the ulnar nerve...
December 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29099893/acute-shortening-versus-bridging-plate-for-highly-comminuted-olecranon-fractures
#9
Meir Marmor, Keiko Amano, Akira Yamamoto, David Friedberg, Erik McDonald, Eric Meinberg
Severely comminuted olecranon fractures, for which elbow stability becomes the main goal of surgery, remain a challenge for surgeons. We conducted a study to determine the percentage loss of articular surface at which a bridge plating (BP) construct becomes too unstable and an acute shortening (AS) construct is required. The olecranon process of 8 fresh-frozen cadaveric upper limbs was serially resected. At each resection, the simulated fracture was fixed first with BP and then with AS. Stability was tested by performing valgus and varus stress tests at various angles under fluoroscopy...
September 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29081707/analysis-of-the-pattern-and-mechanism-of-elbow-injuries-related-to-armbar-type-armlocks-in-jiu-jitsu-fighters
#10
Thiago Bernardo Carvalho DE Almeida, Eiffel Tsuyoshi Dobashi, Alexandre Yukio Nishimi, Eduardo Bernardo DE Almeida, Luciano Pascarelli, Luciano Miller Reis Rodrigues
OBJECTIVE: The objective of this study was to analyze elbow injuries and their probable mechanism in Jiu-Jitsu fighters resulting from the armbar-type armlock. METHODS: We evaluated 5 high-performance Jiu-Jitsu fighters from the Gracie Elite gym who were injured during a tournament. All were healthy males with a mean age of 28.8 years. The right arm was involved in three patients (60%). The athletes were followed for approximately 4.6 months, and pain was present in all cases...
September 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/29051884/curettage-using-soft-wire-for-enchondroma-in-the-hand-a-technical-note
#11
Akio Sakamoto, Shuichi Matsuda
INTRODUCTION: Enchondromas are benign bone cartilaginous lesions predominantly seen in the hand, possibly leading to a pathological fracture. When the lesion expands to the whole phalanx, curettage through a small fenestration is difficult. To overcome the problem, soft-wire (cerclage wire) was used as a curette. Soft-wire is commonly used for a tension band wiring method for patellar or olecranon fractures. TECHNIQUE: Two representative cases are presented: one is a 43-year-old male with enchondroma in the middle phalanx of the left index finger, and the other is a 28-year-old female with enchondroma in the distal phalanx of the right thumb...
May 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29037846/altered-bone-density-and-stress-distribution-patterns-in-long-standing-cubitus-varus-deformity-and-their-effect-during-early-osteoarthritis-of-the-elbow
#12
S Miyamura, K Oka, S Abe, A Shigi, H Tanaka, K Sugamoto, H Yoshikawa, T Murase
OBJECTIVE: To quantify the bone density and stress distribution patterns in long-standing cubitus varus and clarify the effects of the deformity on bone density. DESIGN: We created three-dimensional computed tomography (CT) elbow models from 21 patients with long-standing cubitus varus deformities without advanced osteoarthritis (OA) and assessed the deformity by superimposing the affected humerus onto a mirror-image of the contralateral normal. Elbows were divided into 13 regions before measuring the bone density of each region and comparing the percentage of high-density volume (%HDV) between affected and normal sides...
October 14, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29037536/open-reduction-and-internal-fixation-for-nonunion-of-extra-articular-distal-humeral-fractures-in-patients-70-years-and-older
#13
Soo Min Cha, Hyun Dae Shin
HYPOTHESIS: The study purpose was to report the clinical and radiologic outcomes of osteosynthesis by open reduction and internal fixation for nonunion of extra-articular distal humeral fractures in patients aged 70 years or older. MATERIALS AND METHODS: This retrospective study included 28 patients who received osteosynthesis treatment between March 2010 and December 2015. Primary conservative treatment had failed in all patients. All surgical procedures were performed via the posterior approach without olecranon osteotomy and with the use of double-locking plates for each column...
October 13, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29025604/double-plating-for-bicolumnar-distal-humerus-fractures-in-the-elderly
#14
Andrea Pantalone, Daniele Vanni, Matteo Guelfi, Alberto Belluati, Vincenzo Salini
Distal humerus fractures are uncommon injuries requiring specific clinical and radiographic analysis in order to plan the optimal therapeutic strategy. In particular, bicolumnar distal humerus fractures (Type A2, A3 and C) are complex fractures. In the last years, double plating fixation became the standard treatment: this procedure helped surgeons to obtain a stable and anatomical fixation and an early mobilization, which is the main outcome for obtaining valuable functional results. In this retrospective study, we evaluated the use of open bicolumnar 90-90 plating for fixation of acute fragility fractures of the distal humerus in elderly patients, using the olecranon osteotomy as surgical approach...
October 2017: Injury
https://www.readbyqxmd.com/read/29023639/an-anatomical-and-mechanical-analysis-of-the-douc-monkey-genus-pygathrix-and-its-role-in-understanding-the-evolution-of-brachiation
#15
C D Byron, M C Granatosky, H H Covert
OBJECTIVES: Pygathrix is an understudied Asian colobine unusual among the Old World monkeys for its use of arm-swinging. Little data exists on the anatomy and mechanics of brachiation in this genus. Here, we consider this colobine to gain insight into the parallel evolution of suspensory behavior in primates. MATERIALS AND METHODS: This study compares axial and appendicular morphological variables of Pygathrix with other Asian colobines. Additionally, to assess the functional consequences of Pygathrix limb anatomy, kinematic and kinetic data during arm-swinging are included to compare the douc monkey to other suspensory primates (Ateles and Hylobates)...
October 11, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28994000/fungal-olecranon-bursitis-in-an-immunocompetent-patient-by-knoxdaviesia-dimorphospora-sp-nov-case-report-and-review
#16
Marcela Guevara-Suarez, Marta Llaurado, Isabel Pujol, Emilio Mayayo, Adela Martin-Vicente, Josepa Gené
Bursitis is a common medical condition that can occur either with or without infection. We present a case of fungal olecranon bursitis in an immunocompetent individual caused by the new species Knoxdaviesia dimorphospora. It is a dematiaceous filamentous fungus characterized by the production of two different conidia: hyaline and cylindrical, which rise up from phialidic conidiogenous cells located in the upper part of differentiated and unbranched conidiophores, and pale brown and ellipsoidal conidia produced by phialidic conidiogenous cells which are born directly on hyphae...
October 9, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28988397/risk-factors-for-development-of-severe-post-traumatic-elbow-stiffness
#17
Wei Zheng, Jiazhi Liu, Jialin Song, Cunyi Fan
PURPOSE: The purpose of this study was to compare different grades of elbow stiffness and investigate demographic, injury, and treatment factors potentially associated with the development of severe elbow stiffness. METHODS: We performed a retrospective study involving 169 patients with post-traumatic elbow stiffness between June 2014 and June 2016. Patient demographics, injury, and treatment details were reviewed. Patients were classified into three groups according to the elbow motion...
October 7, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28955693/olecranon-fractures-have-features-of-osteoporotic-fracture
#18
Seong Cheol Park, Hyun Sik Gong, Kahyun Kim, Seung Hoo Lee, Sehun Kim, Goo Hyun Baek
BACKGROUND: To determine whether olecranon fractures have osteoporotic features such as age-dependent, low bone attenuation and low-energy trauma as a cause of injury. METHODS: Elbow computed tomography (CT) and medical record review were performed in 114 patients (53 males and 61 females) with acute olecranon fractures. The mean age was 57 years. Bone attenuation was measured on the central part of the olecranon on sagittal CT images avoiding the fracture, and on the distal humerus (distal metaphysis and medial and lateral condyles) on coronal CT images...
August 2017: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/28953168/bipedicle-flaps-for-posterior-elbow-reconstruction
#19
Kyle J Chepla, Shirley Shue, Bram R Kafuman
Chronic posterior elbow soft tissue defects often require soft tissue reconstruction because of exposure of the underlying triceps tendon and proximal ulna. Current options for soft tissue coverage require sacrifice of a local muscle or microsurgery. The purpose of this study is to evaluate patient and surgical outcomes after reconstruction of small-sized to medium-sized (<50 cm) posterior elbow defects with bipedicle advancement flaps. A retrospective chart review was performed for 3 patients who underwent posterior elbow reconstruction with bipedicle flaps...
December 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28932288/tension-band-suture-fixation-for-olecranon-fractures
#20
Joideep Phadnis, Adam C Watts
Olecranon fractures are common and often require surgical treatment when displaced. Traditional methods of stabilization using tension band wire fixation and plate fixation achieve adequate union and function but are associated with a high rate of re-operation and wound problems because of prominent metalwork. The purpose of the present article is to describe an all suture technique for fixation of simple olecranon fractures that maintains inter-fragmentary compression, provides bony union and reduces the rate of re-operation caused by prominent metalwork...
October 2017: Shoulder & Elbow
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