bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of the mineral bond between associations of crystallites on bone matrix mechanical properties. modeling by the finite element method
Authors: Avrunin A. S. , Semenov A. S. , Fedorov I. V. , Mel’Nikov B. E. , Doctorov A. A. , Parshin L. K.
Published: April 2018

For the first time on the basis of computer modeling using the finite element method the mechanical role of mineral compounds, binding all of the bone minerals in the whole monolith was evaluated. By multivariate computational experiments the authors established the qualitative features and obtained the quantitative assessment of the influence of the bridges on the stiffness and stress-strain state of the representative volume element (RVE). The effective elastic moduli of the nanocomposite bone RVE were estimated by the of finite element homogenization method taking into account the availability of bridges. The presence of the bridge enhances bone stiffness regardless of the direction of acting loads. Consequently, bridge plays an important biological role in increasing the strength properties of the skeleton at nonstandard directions of the load. Data presented in this paper show an extremely complex mechanical phenomena developing in the mineral matrix, which can be adequately assessed only by using a computer modeling based on the morphologically correct structural relationships of its components.
Functional magnetic resonance imaging in front knee instability
Authors: Chmutov A. M. , Sokolova V. A. , Astapenkov D. S.
Published: April 2018

The aim of the study is to assess the possibilities of functional magnetic resonance imaging (MRI) of the knee and the comparison of its results with other known methods of quantitative diagnosis of anterior instability. Material and methods. The study included 22 patients aged 16 to 84 years. The first group comprised 16 patients with complaints of instability of the knee joint, the second - six patients with no signs of instability (relatively healthy). In addition to conventional clinical examination (Lachman test and the "front of the drawer"), all participants in the study conducted functional MRI according to our methodology on the unit «HELPIC RENEX» 0,25 T open. In order to assess its informativeness all patients underwent functional X-ray of the knee on the unit Italrey «PIXEL HF» (Italy). Arthroscopy with intraoperative Lachman to testing performed in 11 patients of the first and second group of five patients on the equipment «Rudolf», Germany. Results. These data suggest that functional MRI is a valuable method to identify the anterior instability of the knee, which can be used as a supplement to commonly used functional imaging, and independently, since comparable results. The main advantages of functional MRI is the lack of radiation exposure and non-invasive visualization of the anterior cruciate ligament in tests on the instability of the knee.
The structure and feature of polytrauma in children of Barnaul
Authors: Timofeev V. V. , Bondarenko A. V.
Published: April 2018

Analysis of fatal polytrauma in children in Barnaul over the period of 11 years, study of medical records of polytrauma patients brought in to hospital and medicolegal autopsy data from the cases of fatal polytrauma in children. 685 cases of child polytrauma were registered from the year 2001 to 2011 including 88 cases of fatal polytrauma. 68 children died before admission, 20 patients hospitalized resulted in death. Most fatal cases resulted from motor vehicle incidents (61 / 69,3%), falling from a height (20 / 22,7%), criminal injuries (3 / 3,4%), home accidents (2 / 2,3%), and street injuries (2 / 2,3%). The highest lethality rate related to cases of falling from a height (18,2%), motor vehicle incidents (13,6%), criminal and street injuries (10%). The lethality rate of child polytrauma in urban area amounted to 12,8%, death rate - 7,1 per 100 000 population per year. The highest lethality rate was noted among infants (27,7%) and adolescents (16,7%). Most fatal cases resulted from motor vehicle incidents (61 / 69,3%). The highest increase of mortality rate in polytrauma is observed during summer season. Major causes of death are shock and substantial blood loss.
Percutaneous transpedicular fixation of the spine under local anesthesia
Authors: Magomedov S. S. , Dokish M. Y. , Usikov V. D. , Ptashnikov D. A.
Published: April 2018

The possibility of the spinal stabilization in patients with a history of somatic diseases and contraindications to general anesthesia is discussed. As an example, the authors have given the histories of two patients with vertebral pathological fractures against a background of the osteoporosis and metastatic gastric cancer who underwent transpedicular fixation of the spine under local anesthesia. In both cases good results of treatment were received.
The main approaches to the knee joint stabilization in patients with cerebral palsy
Authors: Umnov V. V.
Published: April 2018

Objective: to improve the results of surgical correction of flexion contracture of knee joint in patients with cerebral palsy. Material and methods. 196 patients with cerebral palsy aged from 2.5 to 18 years old were examined. In 131 patients aged from 8 to 18 years old we performed lengthening of tibia flexors with posterior capsulotomy and without it, in 4 patients aged from 11 to 16 years old the contracture was corrected after preliminary reduction of muscle tone using lumbar dorsal selective rhizotomy (LDSR). Among 246 operated segments a slight contracture in 23 cases was eliminated only with lengthening of tibia flexors, in the remaining 223 cases in addition after lengthening of tibia flexors the residual contracture was corrected by the method of pre-dosed correction in plaster cast. In 16 segments if there was a severe contracture we performed a posterior capsulotomy of knee joint. Besides, we investigated the dependence of contraction degree from phase-tonic activity of tibia flexors, as well as the influence of LDSR on the possibility to correct flexion contracture in 65 knee joints of patients aged from 2.5 to 16 years old. Results. The high degree of dependence of knee flexion contracture (KFC) from tone increase of tibia muscle flexors (correlation coefficient r p
Affect of surgical approaches on functional results of total hip arthroplasty in early postoperative period
Authors: Andreyev D. V. , Naumenko I. V. , Goncharov M. Y. , Drozdova P. V. , Preobrazhenskiy P. M.
Published: April 2018

Minimally invasive approaches implies a less soft tissue damage and, therefore, more rapid recovery of the patient in the early postoperative period. The present study is a comparison of minimally invasive and standard approaches using biomechanical analysis of standing and walking patients before and after total hip arthroplasty, as well as an analysis of clinical outcomes in the early postoperative period. Fifty patients undergoing primary total hip arthroplasty using a minimally invasive and conventional techniques were divided into three groups. The first group consisted of patients operated on using the MIS AL (modified minimally invasive approach Watson-Jones) (n = 17), the second - MDM (minimally invasive approach to the modified Mueller) (n = 16) and in the third - with the use of transgluteal conventional approach by Harding (n = 17). The estimation of biomechanical parameters in static and dynamic patients before surgery and at 8-10 days after surgery. Also assessed clinical outcome postoperative visual analogue scale (VAS) and Harris scale on day 10, 6 and 12 weeks and 1 year. When comparing the three groups of patients stabilometry best results were observed in groups of minimally invasive approaches MIS AL and MDM. When comparing the three groups significantly better (a moderate increase in the duration of the step, rolling the contralateral limb and a slight increase in the duration of the step the operated limb by increasing the duration of the roll-over) were identified in the minimally invasive group MIS AL and MDM. In assessing the scale of Harris in the early postoperative period, higher rates were observed in groups of minimally invasive approaches. A year after the operation functional results become similar in all groups.
Choice of surgical treatment of pectus excavatum in children based on elasticity criteria of sternocostal complex
Authors: Khodjanov I. Y. , Khakimov S. K. , Kasimov K. A.
Published: April 2018

This report presents the results of the operative correction of the pectus excavatum in 45 children aged from 5 to 15 years. In relation to the elasticity degree and age of the patients there was performed correction of the pectus excavatum by method of D. Nuss and in modification with application of a metal plate of the own construction. At normal elasticity (degree I) of the anterior sternocostal complex in 22 (48,9%) patients was executed operative intervention by method of D. Nuss, with good result in 21 (95,4%) and satisfactory in 1 (4,5%) patient. At moderate degree of elasticity (II-degree) in 13 (28,9 %) patients procedure of D. Nuss in modification of our clinic was performed. The correction of the pectus excavatum was carried out by chondrotomy of the deformed ribs and placement of the metal plate under the sternocostal complex. The good results were noted in 11 (84,6 %) patients, satisfactory - in 2 (15,4%). At the hypopastic sternocostal complex (degree III) the deformation was removed by Т-shaped or cross sternotomy with chondroresection of some ribs and then placement of the metal plate of D. Nuss under sternocostal complex. The good results were found in 7 (70 %), satisfactory - in 1 (10 %) and unsatisfactory - in 2 (20 %) patients. Thus, the long-term results of treatment depend on the elasticity of sterno-costal complex and the child’s age.
Analysis of the results of different types of diaphyseal tibial fractures with intraosseous and of plate osteosynthesis
Authors: Pisarev V. V. , Aleinikov A. V. , Vasin I. V. , Oshurkov Y. A.
Published: April 2018

Aim of this study - comparative assesment of treatment outcomes of different types of diaphyseal shin fractures in patients with bone and intraosteal lackable osteosynthesis. Material and methods. We examined 222 patients with fused diaphyseal shin fractures. In 122 patients close reduction and intraosteal lackable osteosynthesis of shin bones was performed, in 100 - open reduction and osteosynthesis of shin bones with plates LCDCP All patients were divided into subgroups according to АО/ASIF classification (fractures type А, В, С). The evaluation of the results was done in two years period after surgery with questionnaire SF36, outpatients clinic cards analysis, CITO cards study outcomes of fractures, rheovasography and X-ray examination. Results. We found that in patients with fractures types A and В these two types of osteosynthesis lead to similar results according to questionnaire SF36, comparable with control group. Bone osteosynthesis in treatment of fractures type С results in higher quality of life, comparable with control group, than intraosteal. Indicators of treatment outcomes in accordance with CITO card in bone osteosynthesis were higher than in intraosteal. In bone osteosynthesis of fractures type A the terms of temporary disability and fusion significantly lower than in intraosteal osteosynthesis of the similar fractures. Reduce of the tolerance to heavy physical stress in patients with fractures type С in intraosteal osteosynthesis determined by low blood flow in shin. Treatment of shin fractures with bone and intraosteal osteosynthesis follows by equal risks of complications.
First metatarsal fixed displaced distal percutaneous osteotomy in the metatarsus primus varus surgical correction
Authors: Berezhnoy S. Y.
Published: April 2018

The purpose of the study was to expand the possibilities of metatarsus primus varus percutaneous correction through the development of surgical technique, taking into account the advantages and disadvantages of known techniques. Materials and method: by the example of 67 surgeries the results of the first metatarsal displaced distal percutaneous osteotomy fixed by the screw were reviewed. Surgical technique was described. Proposed intervention was applicable over a wide range of the first intermetatarsal angle (from 12 to 29° in this series). Immediate fool weight-bearing was authorized. An average hospital stay was 1.02 due to the painless early postoperative period. Results: desired correction of the first metatarsal has been achieved in the course of all surgical interventions. Partial or complete loss of correction in the postoperative period, that did not affect final results, was registered in three patients after interventions on four feet. The average first intermetatarsal angle after surgery was 10.6 ° (4-16). No transfer metatarsalgia, infectious or other complications were noted, as well as unsatisfactory results. Conclusions: first metatarsal fixed displaced distal percutaneous osteotomy together with previously proposed percutaneous first metatarsocuneiform joint arthrodesis technique allows percutaneous correction of any degrees of metatarsus primus varus.
Manifestations of undifferetiated connective tissue dysplasia in children with cerebral palsy
Authors: Tupikov V. A.
Published: April 2018

Objective - to reveal the phenotypic features of undifferentiated connective tissue dysplasia in the form of dysplastic syndrome. Material and methods. The study included 477 children (240 boys and 237 girls) with cerebral palsy (CP) aged from 1 year to 17. The control group consisted of 134 healthy children (70 boys and 64 girls) aged from 2 to 16. For verification of undifferentiated connective tissue dysplasia international phenotypic Glesby scale, Abakumova scale and Kadurina and Gorbunova scale were applied. Results. Depending on used criteria, the clinical signs of dysplastic syndrome were found in 77,3-80,9% of children with cerebral palsy compared with 14,2-15,7% in the control group. There were statistically highly significant (p
Characteristics of proximal tibial epiphysis structure and effectiveness of impression fragments fixation in tibial 57 condylar fractures (in vitro study)
Authors: Voronkevich I. A.
Published: April 2018

The structure of cancellous bone of the proximal tibial epiphysis using CT and measurement of Leeb hardness was investigated. The author found that subchondral layer as thick as 10 - 15 mm which corresponds with the thickness of impressed fragments of tibial condylar fracture has the density and elasticity modulus up to 84,4% of lowest threshold value of the compact bone. In more deep layers from cartilage the cancellous bone progressively loose it’s density and hardness and deeper than 40 mm they reach their lowest threshold value. Higher level of plating with screwing through impression fragment can persist significantly more (p
Mathematical computer modeling of biomechanical behaviour of hip endoprosthesis modified stem
Authors: Batpenov N. D. , Mamonov A. M. , Karpov V. N. , Levochkin A. A. , Baymagambetov S. A. , Batpen A. N.
Published: April 2018

The principles of mathematical modeling have been proposed in development and prognosing of biomechanical behavior of modified stem of hip prosthesis. We have made computer calculation of tensions and deformities of femoral component of metal stem and bone structures. We have defined critical disorders and wear of metal prosthesis with long groove and without groove. Mathematical calculations and the results confirm functional reliability and workability of the modified prosthesis.
Assessment of bone quality by the technique of multispiral computer tomography in patients with chronic osteomyelitis
Authors: Dyachkova G. V. , Dyachkov K. A. , Aleksandrov S. M. , Larionova T. A. , Klyushin N. M.
Published: April 2018

Purpose - to study the roentgenomorphological features of the lower limb long bones in patients with chronic osteomyelitis using the technique of multi-spiral computer tomography (MSCT), and to propose the complex of parameters to assess bone quality. Material and methods. Roentgenography and computer tomography of the hips were performed in 49 patients with chronic osteomyelitis of long bones of lower extremities. The studies made using computer tomographs GE Light Speed VCT, Toshiba Aquilion-64, Somatom Smile. Results. The changes in bone structure of proximal femur were characterized by extremely marked polymorphism, and they almost didn’t repeat in the anatomical component. The cortical plate had heterogenous structure with resorption zones in the area of its transfer to the shaft. The character of roentgenomorphological changes in the shaft was individual in all the patients, but there were common manifestations as well which consisted in thickening of the cortical plate, different intensity of periosteal and endosteal layers. The cortical plate was significantly different in density, which exceeded 1700 HU in some places. When osteomyelitic process localized in the knee marked changes affected its all components, they manifested themselves in extended osteoporosis and local osteosclerosis. When osteomyelitic process localized in proximal tibia extensive resorption zones observed, the cortical plate thinned in proximal parts, its density was not more than 350 HU. Conclusion. The data demonstrated that bone quality in patients with chronic osteomyelitis had significant deviations from normal values in terms of changing both its density and architectonics. The deviations consisted in bone density decrease in the meta-epiphyseal part regardless of the process localization, in highly variable density values of the cortical plate as a result of its thickening or thinning, presence of resorption or sclerosis areas.
Orthopedic implant-associated infection: the main etiological agents, local resistance and antimicrobial therapy recommendations
Authors: Bozhkova S. A. , Tikhilov R. M. , Krasnova M. V. , Rukina A. N.
Published: April 2018

Surgical site infections remain a major complication of arthroplasty, spinal stabilization or other orthopedic surgeries. The pathogenesis of these complications is related to use orthopedic implants. This retrospective study investigated the microbiological etiology of implant-associated infection after orthopedic surgery over a 3-year period (2010-2012). The antibiotic resistance profiles of 1350 clinical microbial isolates were determined. The biofilm forming capacity of 394 staphylococcal strains was tested. Statistical analysis was performed using Z-criterion. From a results of the microbiological culture, Staphylococcus aureus and Staphylococcus epidermidis were isolated in 49,9% of cases, followed by: Enterococcus faecalis - 6,4%, Pseudomonas aeruginosa - 5,9%, Acinetobacter spp - 5,1% and members of the family Enterobacteriaceae - 4.1%. MRSA amounted to 23,9% and MRSE - 56,6% (p
Pathological changes of the anterior cruciate ligament autografts and some clinical-morphological correlations at the frontal-medial knee joint instability relapses
Authors: Grigorovskiy V. V. , Strafun S. S. , Bogdan S. V.
Published: April 2018

Purpose: on the basis of study of histologic changes characterizing the condition of tendinous autografts of the anterior cruciate ligament ^TACL) to establish dependencies between clinical and morphologic indicators in patients with signs of knee joint anteromedial instability relapse. Material and methods: 30 resected tendinous transplants have been used received from own patellar ligament (10 cases) and semitendinous and gracilis muscles of the femur (20 cases). After histologic study the parameters of some graduated morphologic indices that versatile characterize the basic processes condition in АТА^ tissues, frequency of their occurrence separately for femoral and tibial parts of the graft, have been determined. Results: АТАСЦ by the moment of their insufficiency with relapse of antero-medial instability, the complex of unevenly expressed pathologic changes has been observed: ischemic-necrotic, dystrophic, inflammatory, reparative-fibrosing and in rare cases metaplastic changes; their topographical combinations and quantitative expressiveness occasionally can vary. In different parts of ATACL the degree of expressiveness of certain morphologic indices of the graft condition varies and can not correspond to separate types of macroarthroscopic estimates. The correlation analysis of pairs relations for nonparametric clinical and morphologic indices separately in femoral and tibial loci has revealed that only some values of coefficient of association corresponding to an moderate range or close to it - both with positive, and negative signs, some values of the coefficient of association have appeared significant by a number of observed cases. Conclusions. The cause of small number of moderate force correlations and absence of close correlations in pairs of indicators «clinic-morphology» is supposed to be in considerable inequality, and probably in cyclic processes of reparation, dystrophy, inflammation and uncontrollable damage of an immature fibrous tissue in ATACL-regenerates, developing during adaptation of the transplant to physical activities and preparing development of its insufficiency.
Microsurgical reconstruction of soft tissues of knee region in absence of local plastic resources in preparation for arthroplasty
Authors: Kutyanov D. I. , Rodomanova L. A. , Afanas’Yev A. O.
Published: April 2018

A new method of microsurgical reconstruction of soft tissues defects of a knee in the conditions of inability to form pedicled flaps of thigh and shin has been offered. Prefabricated pedicled fasciocutaneous donor flap of the thickness needed is created on the anterior and anterior-medial surface of the same thigh. The donor flap is based on the previously transplanted radial forearm fascial free flap. This method provides recreation of wholesome periarticular soft tissues, eradication of the local infection, increase of range of motion in the knee joint and possibility to fulfill in the future perspective total knee arthroplasty as well as any other surgical operations.
Surgical treatment of diastematomyelia using ct-based navigation system (case report)
Authors: Vissarionov S. V. , Kokushin D. N. , Snishchuk V. P.
Published: April 2018

The authors presented the clinical observation of the patient 14 years old with congenital malformation of the spinal canal associated with congenital scoliosis and multiple vertebral malformations. The main congenital malformation was diastematomyelia type I at level Th11-Th12, fixed spinal cord syndrome and flail legs. The surgery was performed in the following way: removal of the bone septum of the spinal canal and elimination of the spinal cord fixation using 3D computer navigation. Using 3D navigation allowed exactly to detect the location of the bone septum, creating conditions for reducing the extent of surgical access and minimizing the area of the approach to the same bone spicules. These factors allowed to manage in postoperative period without additional external orthotics. The observation period for patients was 1 year 7 months after surgery.
TREATMENT OF TRANSCONDYLAR EXTENSOR FRACTURES OF THE HUMERUS IN CHILDREN: ON THE ISSUE OF HISTORY OF THE METHOD “COLLAR AND CUFF”
Authors: Zolotov A. S. , Dubovyy S. A.
Published: April 2018

The article is devoted to the history of one of the methods of conservative treatment humeral transcondylar extensor fractures in children - a method «collar and cuff». The second and very common name of this method is connected with the name of the american orthopaedist Walter Blount. «The method of Blount» is mentioned in many domestic and foreign sources. Nevertheless the analysis of publications on the history of the discussed method of treatment indicates the priority in this matter other famous doctor - British podiatrist Robert Jones.
CRITICAL ANALYSIS OF MECHANOSTAT THEORY PART II. STABILITY OF MECHANO-METABOLIC SKELETON ENVIRONMENT AND HOMEOSTATIC PARAMETERS OF CALCIUM IN ORGANISM
Authors: Avrunin A. S. , Parshin L. K. , Melnikov B. E.
Published: April 2018

Aim: Basing on own and literature date to characterize biological necessity of modification the ability of bone structures to be deformed and carrying capacity of lacunar-channel system to provide the basis for interaction between this pathways and parameters of calcium homeostasis. Results: There are two ways of bone matrix remodeling. The first group of pathways is responsible for slow adaptation of bone structures ability to be deformed within physiological range during weeks, months, years. The second group ensures rapid response of carrying capacity of lacunar-channel system (minutes and ours). This two mechanisms function in conjunction with hierarchically organized calcium metabolism. The first level of the latter is direct two-phase exchange of ionized calcium between extracellular liquid of bone tissue and blood: a) paracellular arrival of ionized calcium from blood into the bone; b) transcellular arrival of ionized calcium from extracellular liquid of bone into blood. The second hierarchical level is remodeling of perilacunar matrix by osteocytes. The third hierarchical level is bone remodeling with collaboration both osteoclasts and osteoblasts.
SURGICAL CORRECTION OF SPINAL DEFORMITY IN IDIOPATHIC SCOLIOSIS: THE HISTORY AND CURRENT STATE (REVIEW)
Authors: Vissarionov S. V. , Sobolev A. V. , Efremov A. M.
Published: April 2018

The article presents the historical and contemporary aspects of the state of the question correct scoliosis spine with dorsal and ventral spinal systems. The variants of spinal deformity correction method from Harrington to modern surgical techniques using both hook and metal screw. Detailed technological aspects of surgical interventions for the correction of spinal deformity using a variety of spinal structures. A comparative estimate of the correction of spinal deformity, the impact on the result of the initial mobility of the spine, level metallofiksatsii vertebral-motor segment, as well as the degree of true derotation vertebrae at the top of the curvature in a variety of surgical procedures. Describes the advantages and disadvantages of options for surgery.
ARTHROSCOPIC FOR TREATMENT OF WRIST PATHOLOGIES
Authors: Golubev I. O. , Sautin M. E. , Balyura G. G.
Published: April 2018

Diagnostics and treatment of wrist joint pathologies still remain one the key problems in hand traumatology and orthopaedics. Extremal sports availability as well as new options for recreation transportation means only sustains the statistics of such injuries. On the other hand, the technological improvements allowed to develop precise optics for surgeries on small joints. Possibilities of minimally invasive closer visualization at magnification substantially changed not only the approach to treatment of wrist joint pathology but also allowed to describe types of lesions unknown earlier. The authors describe basic principles of wrist joint arthroscopy and features of its application in various injuries: scaphoid fractures, intraarticular fractures of distal radius metaepiphysis, triangular fibrocartilage complex injuries.
PERIPROSTHETIC FRACTURES AFTER JOINT REPLACEMENT: A UNIFIED CLASSIFICATION SYSTEM
Authors: Howard Lisa C. , Duncan Clivе P.
Published: April 2018

Periprosthetic fracture associated with joint replacement is a common reason for revision arthroplasty and is increasing. Establishing universal principles of management is essential for good outcomes and a classification system that not only classifies, but offers these principles, is critical to achieve this. The Vancouver Classification System (VCS) for periprosthetic fractures involving total hip arthroplasty is validated across North America and Europe. It does not, however, consider other periprosthetic fractures in different joints. The Unified Classification System (UCS) was developed to incorporate the classification and treatment principles of all periprosthetic fractures in any anatomic location. The system is based on the simple mnemonic “ABCDEF” which corresponds to fractures characterized by the following anatomic descriptors: 1) apophyseal; 2) bed of the implant; 3) clear of the implant; 4) dividing the bone between two arthroplasties; 5) each of two bones supporting one arthroplasty; 6) facing and articulating with an implant. Initial validation for the UCS shows substantial and near-perfect inter and intra-observer agreement. Given this performance, it has the potential to evolve into the gold standard classification system for periprosthetic fractures in any joint that they occur.
REPRODUCIBILITY OF THE BASIC X-RAY PARAMETERS OF LOWER EXTREMITY DEFORMATIONS IN CHILDREN WITH SKELETAL DYSPLASIA
Authors: Morenko E. S. , Kenis V. M. , Sapogovskii A. V.
Published: April 2018

Introduction: axial deformities in the lower extremities of children lead to an uneven distribution of the load in different compartments of the knee joint, which can contribute to the development of osteoarthritis. Regardless of the cause of their occurrence, the main goal of treatment is the restoration of the mechanical axis. Various calculation methods are used to determine the amount of deformity, its apex and the degree of required correction. The aim: to evaluate the reproducibility of the basic X-ray parameters characterizing the deformities of the lower extremities in the frontal plane in children with skeletal dysplasia based on the calculation of inter-rater reliability.Materials and methods: the article presents calculations of the main angulometric parameters of the knee joint (deviation of the mechanical axis — MAD, distal mechanical angle of the femur — mLDFA, proximal angle of the tibia — MPTA) in 18 patients with skeletal dysplasia (30 lower extremities) that had axial deformities of the lower extremities in the frontal plane at the level of the knee joint. The control group included the results of similar calculations of the angulometric parameters in 19 children (30 lower extremities) with valgus and varus deformities of the knee joint without skeletal dysplasia (idiopathic axial deformations, posttraumatic deformities, malformations of the lower limbs). The estimation of inter-expert reliability was made in the SPSSv. 23.Results: the analysis demonstrated that calculation of reference parameters in children without primary lesion of the growth plate has a high degree of inter-rater reliability: an intra-class correlation coefficient with a 95% confidence interval (ICC [95% CI]) when calculating the reference angles of mMPTA and mLDFA was 0.981% [0.971–0.991] and 0.993% [0.989–0.997] respectively, for MAD 0.996% [0.993–0.998]. When calculating the same parameters in children with skeletal dysplasia, the results differed. Thus, the intra-class correlation coefficient for the deviation of the mechanical axis was 0.861% [0.763–0.926] (which corresponds to the normal reproducibility of this parameter), for mMPTA — 0.586% [0.295–0.781], for mLDFA — 0.796% [0.653–0.892]. This indicates a low reproducibility and may lead to errors in the planning of correction of axial deformities of the lower limbs in children with skeletal dysplasia.Conclusion: when calculating the severity of axial deformities in the lower extremities in children with skeletal dysplasia, the most reproducible parameter is the determination of the deviation of the mechanical axis of the lower extremities as compared to the studied angulometric methods.
PATHOMORPHOLOGICAL FEATURES OF BONE LESIONS AND CORRELATION OF CLINICAL, LABORATORY AND MORPHOMETRIC CRITERIA IN PATIENTS WITH LATENT SCLEROSING HEMATOGENOUS OSTEOMYELITIS (GARRÉ)
Authors: Grigorovsky V. V. , Gordy A. S. , Lyutko O. B. , Grigorovskaya A. V.
Published: April 2018

Introduction. Sclerosing hematogenous osteomyelitis of Garré (SHO) holds a significant place among cases of latent hematogenous osteomyelitis. Pathomorphological studies of sclerosing hematogenous osteomyelitis are needed to improve differentiated diagnostics, to prognosticate morphology specifics of nidus and to choose the optimal treatment tactics.Purpose of the study — to identify statistical differences between manifestation patterns of various disease types and correlation between clinical, laboratorial and morphometric criteria of bone lesions in patients with sclerosing hematogenous osteomyelitis.Material and methods. The authors studied tissue fragments of affected bones of 25 patients with SHO which was diagnosed by clinical, laboratorial, visualizing and morphological methods. Gradation morphometric criteria were used to reflect condition of nidus tissues. The authors made the analysis of qualitative characters and correlation analysis of dependencies between clinical and laboratorial criteria on the one hand, and with morphometric criteria — on the other, and identified association factor. Results. Pathomorphological study of SHO nidus demonstrated variances of bone lesions in separate disease cases despite the overall similarity of morphological manifestation. About 2/3 of all cases correspond to fibrosing type whereby even small exudative inflammation sites are absent. In about 1/3 of all cases apart from fibrosis, osteosclerosis and remodeling, the osteomyelitis niduses contain microabscesses indicative of suppurative inflammation as well as the authors observed small sequestration. The maximum differences in patients with various types of SHO were identified in such parameters as share of stab microphages and erythrocyte sedimentation rate (ESR). In cases of long term morbidity the fibrosing disease type is prevailing, in cases of short term lesion (1–2 years) — a fibrosing type with microabscesses formation.A series of correlation dependencies was reported between clinical and laboratorial criteria on the one hand, and with morphometric criteria — on the other hand.Conclusion. Pathomorphological features of bone lesions in sclerosing hematogenous osteomyelitis are nonhomogeneous. Every case in the study demonstrated stereotype alterations such as substantial diffuse fibroses of marrow spaces in cancellous bone and bone regenerate, remodeling of bone tissues with gradual acceleration of osteosclerosis and persisting productive inflammation. Only in sone cases featured small sites of exudative inflammation — microabscesses with microsequestration.
Perpetuación de violencias verbal y psicológicas en las relaciones afectivas y de familia en adolescentes de Cali
Authors: Bermúdez Quintana Elba María , Valero Londoño Alba Nelly , Díaz Chavarro Blanca Cecilia , Castrillón Muñoz Eduardo , Castrillón Libreros Diana María
Published: April 2018

A través de la metodología pedagógica de educación entre pares, el grupo de investigación observó que jóvenes adolescentes estudiantes de las comunas 6 y 18 de la ciudad de Cali se relacionan entre sí con actitudes, comportamientos y expresiones verbales propias de una cultura violenta, asimétrica y machista. El análisis de esta problemática planteó la necesidad de realizar un estudio cualitativo, de tipo descriptivo-interpretativo, que indagara sobre las raíces de estos tipos de violencia basada en género, tanto en parejas como en familias, en dos instituciones educativas de estas comunas. Así, se definieron dos objetivos de investigación: explorar, a través de la educación entre pares, la manera como se afrontan los conflictos en las relaciones afectivas e indagar y analizar el manejo que se da a los problemas familiares. Los resultados reafirman que hay una naturalización del uso de un lenguaje violento, así como acciones propias de una cultura asimétrica y patriarcal que se consolidan y afianzan en el imaginario de los jóvenes adolescentes.
Etapa puberal en niños con parálisis cerebral
Authors: Sabbag Alexandre de Aguiar , Costin Ana Claudia Martins Szczypior , Menegassi Daniel Alves , Silva Juliana Bertolino , Braga Marina Marcondes , Neves Eduardo Borba
Published: April 2018

Este estudio evalúa el desarrollo puberal de niños diagnosticados con parálisis cerebral e identifica el género con la mayor incidencia de maduración precoz de los caracteres sexuales secundarios. Se evaluaron 25 niños entre 5 y 10 años, caucásicos y con diagnóstico de parálisis cerebral. Se evaluó y clasificó la fase de maduración sexual del paciente de acuerdo con la Escala de Tanner. Se observó una maduración temprana de los caracteres sexuales secundarios en tres niñas y nueve niños y una diferencia estadísticamente significativa entre el desarrollo genital en los niños y las mamas en las niñas (p = 0,01). Los niños presentaron una velocidad de maduración de los genitales mayor al de las mamas en las niñas (telarca). Las niñas tienen un mayor desarrollo de los vellos púbicos (pubarca) que los niños (p = 0,05). Se concluye que existe una relación directa entre los trastornos neurológicos y la maduración de los caracteres sexuales secundarios en niños con parálisis cerebral.
Las fronteras como espacios de poder y resistencia en el periodo colonial
Authors: Campion Canelas Minerva
Published: April 2018

Este artículo analiza a partir de una perspectiva holística, el desarrollo de las fronteras territoriales y sociales del Virreinato de Perú. La discusión se centra en la creación, avance, retroceso y transformación de las fronteras en la Audiencia de Quito. Para ello, comprendemos los procesos de expansión y retroceso de las fronteras en términos de relaciones de poder. En este sentido, se evidencia no sólo la expansión de la frontera colonial, sino también las experiencias de resistencia indígena en las regiones fronterizas.
Teorías de la verdad y mundo contable: de la correspondencia a la estrategia comunicativa
Authors: Romero León Henry Antonio
Published: April 2018

En este escrito se busca proponer una lectura sobre la representación y la verdad en la contabilidad desde la teoría discursiva de Jürgen Habermas. Esto ha de permitir una mejor comprensión de la naturaleza comunicativa implicada en la divulgación de información financiera y la emisión de estándares para su difusión. Mediante un breve repaso sobre las teorías filosóficas de la verdad, se hace una revisión crítica a las observaciones hechas por algunos tratadistas contables al respecto. Así, se introducen los conceptos de «giro pragmático» y «acto de comunicación» en la información contable, como constructo heurístico que hace posible hacer una aclaración conceptual necesaria para el desarrollo teórico y práctico. Si se considera la contabilidad como acto comunicativo, se desestructura la idea de ser abordada en términos de simple información. En consecuencia, se sostiene que su validez no solamente radica en la verdad, sino en la veracidad y la corrección normativa.
Comparison of Online Survey Recruitment Platforms for Hard-to-Reach Pregnant Smoking Populations: Feasibility Study (Preprint)
Authors: Ibarra Jose Luis , Agas Jessica Marie , Lee Melissa , Pan Julia Lily , Buttenheim Alison Meredith
Published: April 2018

BACKGROUND

Recruiting hard-to-reach populations for health research is challenging. Web-based platforms offer one way to recruit specific samples for research purposes, but little is known about the feasibility of online recruitment and the representativeness and comparability of samples recruited through different Web-based platforms.

OBJECTIVE

The objectives of this study were to determine the feasibility of recruiting a hard-to-reach population (pregnant smokers) using 4 different Web-based platforms and to compare participants recruited through each platform.

METHODS

A screener and survey were distributed online through Qualtrics Panel, Soapbox Sample, Reddit, and Amazon Mechanical Turk (mTurk). Descriptive statistics were used to summarize results of each recruitment platform, including eligibility yield, quality yield, income, race, age, and gestational age.

RESULTS

Of the 3847 participants screened for eligibility across all 4 Web-based platforms, 535 were eligible and 308 completed the survey. Amazon mTurk yielded the fewest completed responses (n=9), 100% (9/9) of which passed several quality metrics verifying pregnancy and smoking status. Qualtrics Panel yielded 14 completed responses, 86% (12/14) of which passed the quality screening. Soapbox Sample produced 107 completed surveys, 67% (72/107) of which were found to be quality responses. Advertising through Reddit produced the highest completion rate (n=178), but only 29.2% (52/178) of those surveys passed the quality metrics. We found significant differences in eligibility yield, quality yield, age, number of previous pregnancies, age of smoking initiation, current smokers, race, education, and income (P<.001).

CONCLUSIONS

Although each platform successfully recruited pregnant smokers, results varied in quality, cost, and percentage of complete responses. Moving forward, investigators should pay careful attention to the percentage yield and cost of online recruitment platforms to maximize internal and external validity.
ON THE MEASUREMENT OF GROWTH PROPERTIES OF ENTIRE AND MEROMORPHIC FUNCTIONS FOCUSING THEIR RELATIVE TYPE AND RELATIVE WEAK TYPE
Authors: Datta Sanjib Kumar , Biswas Tanmay
Published: April 2018

The concepts of relative growth indicators such as relative order, relative type, relative weak type, etc. have widely been used to avoid comparing growths of entire and meromorphic functions just with exp functions. Using the notions of several relative growth indicators as mentioned earlier, in this paper we would like to find out the limits in terms of classical growth indicators (i.e. order, type, weak type etc.) in which the relative type, relative weak type, etc. of meromorphic functions with respect to entire functions should lie.
VISUALIZATION OF LINES OF CURVATURE ON QUADRATIC SURFACES
Authors: Velickovic Vesna
Published: April 2018

In this paper, we give a complete survey of the lines of curvature onquadratic surfaces, and, more generally, on tangent surfaces, generalcylinders and cones. We also apply our own software to the graphical representation of all the results we present.
BEST PROXIMITY AND COUPLED BEST PROXIMITY POINTS OF ( psi-phi-theta )-ALMOST WEAKLY CONTRACTIVE MAPS IN PARTIALLY ORDERED METRIC SPACE
Authors: Babu Venkata Ravindranadh Gutti , Leta Bekere Kumssa
Published: April 2018

In this paper we obtain some best proximity point results using almost contractive condition with three control functions (in which two of them need not be continuous) in partially ordered metric spaces. As an application, we prove coupled best proximity theorems. The results presented in this paper generalize the results of Choudhury, Metiya, Postolache and Konar [8]. We draw several corollaries and give illustrative examples to demonstrate the validity of our results.
ON THE CHARACTERIZATION OF TASKS MODELED BY INTERVAL DESIGN STRUCTURE MATRIX ON DOMAIN-DRIVEN DESIGN SOFTWARE DEVELOPMENT
Authors: Petković Ivan , Rajković Petar , Milenković Aleksandar
Published: April 2018

Development and design of new products of various kinds often contain a very complex set of relationships among many coupled tasks. Ranking, controlling and redesigning the features of these tasks can be usefully performed by a suitable model based on the design structure matrix in an iteration procedure. The proposed interval approach of design iteration controls and predicts the convergence speed of iteration work on tasks within a project. Interval method is based on Perron-Frobenius theorem and interval linear algebra where intervals and interval matrices are employed instead of real numbers and real matrices. In this way, a more relaxed quantitative estimation of tasks is achieved and the presence of undetermined quantities is allowed to a certain extent. The presented model is demonstrated in the example of simplified domain-driven design process, an approach to software development.
ON THE SPACES OF λm-BOUNDED AND λm-ABSOLUTELY p-SUMMABLE SEQUENCES
Authors: Ercan Sinan , Bektaş Çiğdem Asma
Published: April 2018

In this paper, we give the notion of λm-boundedness and p-absolute convergenceof type λm and using these notions we define new sequence spaces. We examinesome topological and geometric properties of these spaces. We also establish someinclusion relations concerning these spaces and characterize some matrix classes.
AN ALTERNATIVE DECOMPOSITION OF CATALAN NUMBER
Authors: Krtolica Predrag , Stanimirović Predrag , Stojanović Igor
Published: April 2018

A particular integer sequence derived by the convex polygon triangulation is introduced and investigated. After some underlying results are presented, the forbidden (or improper) integer values relative to the triangulation are concerned. It is understood that the forbidden sequences do not correspond to any triangulation. Some of their properties are presented. These properties are used to count the forbidden values, which is, finally, exploited in stating another decomposition of the Catalan number.
Analysis Accuracy of Similar Word Based Clustering (EWSB) Algorithm on Machine Translator Bahasa Indonesia-Minang
Authors: Sujaini Herry
Published: April 2018

Extended Word Similarity Based (EWSB) Clustering is a word clustering algorithm based on the value of words similarity obtained from the computation of a corpus. One of the benefits of clustering with this algorithm is to improve the translation of a statistical machine translation. Previous research proved that EWSB algorithm could improve the Indonesian-English translator, where the algorithm was applied to Indonesian language as target language.This paper discusses the results of a research using EWSB algorithm on a Indonesian to Minang statistical machine translator, where the algorithm is applied to Minang language as the target language. The research obtained resulted that the EWSB algorithm is quite effective when used in Minang language as the target language. The results of this study indicate that EWSB algorithm can improve the translation accuracy by 6.36%.
Impression Classification of Endek (Balinese Fabric) Image Using K-Nearest Neighbors Method
Authors: Pradnyana Gede Aditra , Suryantara I Komang Agus , Darmawiguna I Gede Mahendra
Published: April 2018

An impression can be interpreted as a psychological feeling toward a product and it plays an important role in decision making. Therefore, the understanding of the data in the domain of impressions will be very useful. This research had the objective of knowing the performance of K-Nearest Neighbors method to classify endek image impression using K-Fold Cross Validation method. The images were taken from 3 locations, namely CV. Artha Dharma, Agung Bali Collection, and Pengrajin Sri Rejeki. To get the image impression was done by consulting with an endek expert named Dr. D.A Tirta Ray, M.Si. The process of data mining was done by using K-Nearest Neighbors Method which was a classification method to a set of data based on learning data that had been classified previously and to classify new objects based on attributes and training samples. K-Fold Cross Validation testing obtained accuracy of 91% with K value in K-Nearest Neighbors of 3, 4, 7, 8.
Total Harmonic Distortion Comparison between Sinusoidal PWM Inverter and Multilevel Inverter in Solar Panel
Authors: Budiman Firmansyah Nur , Ramadhani Muhammad Ridho
Published: April 2018

This research compared the performance of PWM (Pulse Width Modulation) inverter and multilevel inverter in terms of their output voltage and current total harmonic distortion (THD). The inverters were designed to have the output voltage of 220 V at 50 Hz. The input voltage for both inverters are 400 VDC. For PWM inverter, the PWM technique utilized was sinusoidal PWM (SPWM) and for multilevel converter, the number of voltage level is five with diode-clamped topology. The study included circuit implementation, analysis, and THD calculation, all of which were carried out through simulation using PSpice software. In controlling the SPWM inverter output, the adjusted parameters included amplitude modulation ratio, frequency modulation ratio, and filter components’ parameters. On the other hand, the firing angles of the switching components were designated as controlling parameters in multilevel inverter. From the study, it was found that the best THD values of the designed SPWM inverter are 4.2% (voltage) and 1.7% (current), while those of multilevel inverter are 27% and 11%, for voltage and current, respectively. Thus, it can be concluded that SPWM inverter is better than 5-level inverter for the application in solar panel due to its lower THD. In our study, 5-level inverter did not satisfy the THD requirement specified in IEEE 512-1992, i.e. 5%.