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https://www.readbyqxmd.com/read/28428920/surgical-strategy-and-techniques-for-low-profile-dorsal-plating-in-treating-dorsally-displaced-unstable-distal-radius-fractures
#1
Yoshitaka Hamada, Hiroyuki Gotani, Naohito Hibino, Yoshitaka Tanaka, Ryousuke Satoh, Kousuke Sasaki, Thepparat Kanchanathepsak
Background The low-profile dorsal locking plating (DLP) technique is useful for treating dorsally comminuted intra-articular distal radius fractures; however, due to the complications associated with DLP, the technique is not widely used. Methods A retrospective review of 24 consecutive cases treated with DLP were done. Results All cases were classified into two types by surgical strategy according to the fracture pattern. In type 1, there is a volar fracture line distal to the watershed line in the dorsally displaced fragment, and this type is treated by H-framed DLP...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28428910/role-of-the-interosseous-membrane-in-preventing-distal-radioulnar-gapping
#2
Frederick W Werner, Matthew R LeVasseur, Brian J Harley, Ashley Anderson
Background Damage to the interosseous membrane (IOM) can alter load transmission between the radius and ulna and decrease their axial stability. Less is known about the effect of IOM sectioning on the transverse stability between the radius and ulna. Purpose The purpose of this study was to quantify the radioulnar gapping at the distal radioulnar joint (DRUJ) during forearm rotation when the IOM was experimentally sectioned while maintaining the integrity of the distal radioulnar ligaments. Methods In 12 fresh-frozen cadaver forearms tested in a combined wrist-forearm simulator, the increase in gap between the radius and ulna, at the level of the DRUJ, was determined during cyclic forearm rotation following IOM sectioning...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28420599/use-of-machine-learning-classifiers-and-sensor-data-to-detect-neurological-deficit-in-stroke-patients
#3
Eunjeong Park, Hyuk-Jae Chang, Hyo Suk Nam
BACKGROUND: The pronator drift test (PDT), a neurological examination, is widely used in clinics to measure motor weakness of stroke patients. OBJECTIVE: The aim of this study was to develop a PDT tool with machine learning classifiers to detect stroke symptoms based on quantification of proximal arm weakness using inertial sensors and signal processing. METHODS: We extracted features of drift and pronation from accelerometer signals of wearable devices on the inner wrists of 16 stroke patients and 10 healthy controls...
April 18, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28418515/pronation-supination-motion-is-altered-in-a-rat-model-of-post-traumatic-elbow-contracture
#4
Chelsey L Dunham, Ryan M Castile, Aaron M Chamberlain, Leesa M Galatz, Spencer P Lake
The elbow joint is highly susceptible to joint contracture, and treating elbow contracture is a challenging clinical problem. Previously, we established an animal model to study elbow contracture that exhibited features similar to the human condition including persistent decreased range of motion (ROM) in flexion-extension and increased capsule thickness/adhesions. The objective of this study was to mechanically quantify pronation-supination in different injury models to determine if significant differences compared to control or contralateral persist long-term in our animal elbow contracture model...
April 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28416850/-treatment-of-complicated-intra-articular-distal-radius-fractures-with-extended-flexor-carpi-radialis-approach
#5
Z Q Gao, G S An, S L Li
OBJECTIVE: To discuss the effect of treatment of complicated intra-articular distal radius fractures with extended flexor carpi radialis approach. METHODS: A retrospective analysis of 38 cases with fresh complicated intra-articular distal radius fractures treated by using extended flexor carpi radialis approach in our hospital from October 2012 to March 2015, with 25 males and 13 females. The average age was (52.76±8.62) years (32-64 years). The average time to surgery was (5...
April 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28410110/portable-and-reconfigurable-wrist-robot-improves-hand-function-for-post-stroke-subjects
#6
Kang Xiang Khor, Patrick Jun Hua Chin, Che Fai Yeong, Eileen Lee Ming Su, Aqilah Leela T Narayanan, Hisyam Abdul Rahman, Qamer Iqbal Khan
Rehabilitation robots have become increasingly popular for stroke rehabilitation. However, the high cost of robots hampers their implementation on a large scale. This study implements the concept of a modular and reconfigurable robot, reducing its cost and size by adopting different therapeutic end effectors for different training movements using a single robot. The challenge is to increase the robot's portability and identify appropriate kinds of modular tools and configurations. Because literature on the effectiveness of this kind of rehabilitation robot is still scarce, this paper presents the design of a portable and reconfigurable rehabilitation robot and describes its use with a group of post-stroke patients for wrist and forearm training...
April 7, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28409134/anatomical-variations-of-pronator-teres-muscle-predispositional-role-for-nerve-entrapment
#7
Edie Benedito Caetano, Luiz Ângelo Vieira, Fábio Antonio Anversa Sprovieri, Guilherme Camargo Petta, Maurício Tadeu Nakasone, Bárbara Lívia Correa Serafim
OBJECTIVE: To assess the anatomical variations of the pronator teres muscle (PTM) and its implication in the compression of the median nerve, which passes through the humeral and ulnar heads of the PTM. METHODS: For the present study, 100 upper limbs from human cadavers from the anatomy laboratory were dissected. Forty-six specimens were male and four, female, whose aged ranged from 28 to 77 years; 27 were white and 23, non-white. A pilot study consisting of six hands from three fresh cadaver dissections was conducted to familiarize the authors with the local anatomy; these were not included in the present study...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28409130/acute-distal-biceps-ruptures-single-incision-repair-by-use-of-suture-anchors
#8
Rafael Almeida Maciel, Priscilla Silva Costa, Eduardo Antônio Figueiredo, Paulo Santoro Belangero, Alberto de Castro Pochini, Benno Ejnisman
OBJECTIVE: Clinical and functional assessment of the surgical treatment for acute injury of the distal insertion of the biceps brachial performed with a surgical technique using a single incision in proximal forearm and fixation with suture anchors in the radial tuberosity. METHODS: This study reviewed the medical records of patients who underwent surgical treatment of distal biceps injury during the period between January 2008 and July 2014. In a mean follow-up of 12 months, 22 patients with complete and acute injury, diagnosed through physical examination and imaging studies, were functionally assessed in the postoperative period regarding the range of motion (degrees of flexion-extension and pronation-supination), the presence of pain (VAS), the Andrews Carson-score, and the Mayo Elbow Performance Score (MEPS)...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28399788/distal-radioulnar-joint-functional-anatomy-including-pathomechanics
#9
J R Haugstvedt, M F Langer, R A Berger
The distal radioulnar joint allows the human to rotate the forearm to place the hand in a desired position to perform different tasks, without interfering with the grasping function of the hand. The ulna is the stable part of the forearm around which the radius rotates; the stability of the distal radioulnar joint is provided by the interaction between ligaments, muscles and bones. The stabilizing structures are the triangular fibrocartilage complex, the ulnocarpal ligament complex, the extensor carpi ulnaris tendon and tendon sheath, the pronator quadratus, the interosseous membrane and ligament, the bone itself and the joint capsule...
May 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28394713/elbow-mri-findings-do-not-correlate-with-future-placement-on-the-disabled-list-in-asymptomatic-professional-baseball-pitchers
#10
Nicholas M Gutierrez, Christopher Granville, Lee Kaplan, Michael Baraga, Jean Jose
BACKGROUND: Injury rates among professional baseball players may reach as high as 5.8 per 1000 encounters, with pitchers being most vulnerable on account of the excessive biomechanical load on the upper extremity during the throwing motion. Anatomically, the shoulder is the most common site of pitching-related injury, accounting for 30.7% of injuries, closely followed by the elbow at 26.3%. Characteristic valgus loading imparts a predictable constellation of stresses on the joint, including medial tension, lateral compression, and posterior medial shearing...
April 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28394688/distance-between-the-malleoli-and-the-grounda-new-clinical-method-to-measure-leg-length-discrepancy
#11
Estela Gomez Aguilar, Águeda Gómez Domínguez, Carolina Peña-Algaba, José M Castillo-López
BACKGROUND: The aim of this work is to introduce a useful method for the clinical diagnosis of leg-length inequality: distance between the malleoli and the ground (DMG). METHODS: A transversal observational study was performed on 17 patients with leg-length discrepancy. Leg-length inequality was determined with different clinical methods: with a tape measure in a supine position from the anterior superior iliac spine (ASIS) to the internal and external malleoli, as the difference between the iliac crests when standing (pelvimeter), and as asymmetry between ASISs (PALpation Meter [PALM]; A&D Medical Products Healthcare, San Jose, California)...
March 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28394675/influence-of-age-sex-and-anthropometric-determinants-on-the-foot-posture-index-in-a-pediatric-population
#12
Ana María Jimenez-Cebrian, María Francisca Morente-Bernal, Pedro Daniel Román-Bravo, Juan Francisco Saucedo-Badía, Juan Antonio Alonso-Ríos, Alonso Montiel-Luque
BACKGROUND: The Foot Posture Index (FPI) is a clinical tool for diagnosis that aims to quantify the grade of a foot position as neutral, pronated, or supinated. Its purpose is to develop a simple six-factor method for rating foot posture with an easy and quantitative result. We evaluated possible differences in the FPI by sex and the influences of age, weight, height, foot size, and body mass index (BMI) on foot posture. METHODS: In 150 asymptomatic children (79 boys and 71 girls) aged 8 to 13 years, we determined weight, height, BMI, and FPI in the bipedal, static, and relaxed position...
March 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28391518/discovery-elbow-system-clinical-and-radiological-results-after-2-to-10-year-follow-up
#13
Patrik Hänninen, Tuukka Niinimäki, Tapio Flinkkilä, Jaakko Niinimäki, Pasi Ohtonen, Susanna Yli-Luukko, Juhana Leppilahti
BACKGROUND: Discovery Elbow System (DES) is a semi-constrained prosthesis, mainly used for patients with rheumatoid arthritis (RA). METHODS: Records from 79 patients with RA (90 DES arthroplasties) were reviewed; 47 patients with 55 DES elbows were re-examined. Range of motion (ROM) of both elbows, upper limb function, and quality of life (Disabilities of the Arm, Shoulder, and Hand [DASH] score, Mayo Elbow Performance Score [MEPS], and the RAND 36-Item Health Survey [RAND-36]) were assessed...
April 8, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28390293/comparison-of-foot-muscle-morphology-and-foot-kinematics-between-recreational-runners-with-normal-feet-and-with-asymptomatic-over-pronated-feet
#14
Xianyi Zhang, Jeroen Aeles, Benedicte Vanwanseele
Over-pronated feet are common in adults and are associated with lower limb injuries. Studying the foot muscle morphology and foot kinematic patterns is important for understanding the mechanism of over-pronation related injuries. The aim of this study is to compare the foot muscle morphology and foot inter-segmental kinematics between recreational runners with normal feet and those with asymptomatic over-pronated feet. A total of 26 recreational runners (17 had normal feet and 9 had over-pronated feet) participated in this study and their foot type was assessed using the 6-item Foot Posture Index...
March 31, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28390188/prediction-of-normal-bone-anatomy-for-the-planning-of-corrective-osteotomies-of-malunited-forearm-bones-using-a-three-dimensional-statistical-shape-model
#15
Flavien Mauler, Christoph Langguth, Andreas Schweizer, Lazaros Vlachopoulos, Tobias Gass, Marcel Lüthi, Philipp Fürnstahl
Corrective osteotomies of the forearm based on 3D computer simulation using contralateral anatomy as a reconstruction template is an approved method. Limitations are existing considerable differences between left and right forearms, and that a healthy contralateral anatomy is required. We evaluated if a computer model, not relying on the contralateral anatomy, may replace the current method by predicting the pre-traumatic healthy shape. A statistical shape model (SSM) was generated from a set of fifty-nine CT scans of healthy forearms, encoding the normal anatomical variations...
April 8, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28389082/distal-humerus-external-rotation-osteotomy-for-hand-position-in-arthrogryposis
#16
Lindley B Wall, Valeri Calhoun, Summer Roberts, Charles A Goldfarb
PURPOSE: In the amyoplasia type of arthrogryposis, a reverse pronated grasp pattern is often seen. We hypothesized that repositioning the hands, through distal humerus external rotation osteotomies (DHO), would allow for palm-to-palm grasp without arm cross-over and would improve function and parent/patient satisfaction. METHODS: The medical records of all patients treated surgically for arthrogryposis were reviewed at the Shriners Hospital for Children, St. Louis, MO...
April 4, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28381125/brachial-artery-transection-after-a-closed-traumatic-isolated-medial-epicondyle-fracture-in-a-pediatric-patient-a-case-report
#17
Brandon S Schwartz, Ebrahim Paryavi, W Andrew Eglseder, Raymond A Pensy, Joshua M Abzug
BACKGROUND: Medial epicondyle fractures in pediatric patients might be associated with an occult elbow dislocation and neurovascular damage. METHODS: A single case of a medial epicondyle fracture presenting with brachial artery transection was reviewed. Presentation, clinical course, and early outcome are reported. RESULTS: A 14-year-old patient presenting with an apparently isolated medial epicondyle fracture was found to have examination and diagnostic test findings consistent with brachial artery transection...
April 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28365146/in%C3%A2-vivo-scaphoid-motion-during-thumb-and-forearm-motion-in-casts-for-scaphoid-fractures
#18
Yohei Kawanishi, Kunihiro Oka, Hiroyuki Tanaka, Kazuomi Sugamoto, Tsuyoshi Murase
PURPOSE: In nonsurgical treatment for acute undisplaced or minimally displaced scaphoid waist fractures, immobilization of both wrist and thumb can be an option. However, in vivo scaphoid motion during forearm and thumb motion with the wrist immobilized in a cast has not been measured. Therefore, we examined the in vivo kinematics of the scaphoid during forearm and thumb motion with cast immobilization. METHODS: Ten healthy right wrists of 10 male volunteers were included...
March 29, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28362636/an-aerodynamic-model-for-insect-flapping-wings-in-forward-flight
#19
Jong-Seob Han, Jo Won Chang, Jae-Hung Han
This paper proposes a semi-empirical quasi-steady aerodynamic model of a flapping wing in forward flight. A total of 147 individual cases, which consisted of advance ratios J of 0 (hovering), 0.125, 0.25, 0.5, 0.75, 1 and  ∞, and angles of attack α of  -5 to 95° at intervals of 5°, were examined to extract the aerodynamic coefficients. The Polhamus leading-edge suction analogy and power functions were then employed to establish the aerodynamic model. In order to preserve the existing level of simplicity, K P and K V, the correction factors of the potential and vortex force models, were rebuilt as functions of J and α...
March 31, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28356621/changes-in-t2-weighted-mri-of-supinator-muscle-pronator-teres-muscle-and-extensor-indicis-muscle-with-manual-muscle-testing
#20
Kazuya Yoshida, Sumikazu Akiyama, Masayoshi Takamori, Hiroshi Otsuka D Eng, Yoshiteru Seo
[Purpose] In order to detect muscle activity with manual muscle testing, T2-weighted magnetic resonance (T2w-MR) images were detected by a 0.2 T compact MRI system. [Subjects and Methods] The subjects were 3 adult males. Transverse T2-weighted multi-slice spin-echo images of the left forearm were measured by a 39 ms echo-time with a 2,000 ms repetition time, a 9.5 mm slice thickness, 1 accumulation and a total image acquisition time of 4 min 16 s. First, T2w-MR images in the resting condition were measured...
March 2017: Journal of Physical Therapy Science
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