bluuebunny/crossref_metadata_2025_split huggingface dataset:
Predictive factors of incomplete aneurysm occlusion after endovascular treatment with the Pipeline embolization device
Authors: Maragkos Georgios A. , Ascanio Luis C. , Salem Mohamed M. , Gopakumar Sricharan , Gomez-Paz Santiago , Enriquez-Marulanda Alejandro , Jain Abhi , Schirmer Clemens M. , Foreman Paul M. , Griessenauer Christoph J. , Kan Peter , Ogilvy Christopher S. , Thomas Ajith J. 
Published: April 2019

OBJECTIVEThe Pipeline embolization device (PED) is a routine choice for the endovascular treatment of select intracranial aneurysms. Its success is based on the high rates of aneurysm occlusion, followed by near-zero recanalization probability once occlusion has occurred. Therefore, identification of patient factors predictive of incomplete occlusion on the last angiographic follow-up is critical to its success.METHODSA multicenter retrospective cohort analysis was conducted on consecutive patients treated with a PED for unruptured aneurysms in 3 academic institutions in the US. Patients with angiographic follow-up were selected to identify the factors associated with incomplete occlusion.RESULTSAmong all 3 participating institutions a total of 523 PED placement procedures were identified. There were 284 procedures for 316 aneurysms, which had radiographic follow-up and were included in this analysis (median age 58 years; female-to-male ratio 4.2:1). Complete occlusion (100% occlusion) was noted in 76.6% of aneurysms, whereas incomplete occlusion (≤ 99% occlusion) at last follow-up was identified in 23.4%. After accounting for factor collinearity and confounding, multivariable analysis identified older age (> 70 years; OR 4.46, 95% CI 2.30–8.65, p < 0.001); higher maximal diameter (≥ 15 mm; OR 3.29, 95% CI 1.43–7.55, p = 0.005); and fusiform morphology (OR 2.89, 95% CI 1.06–7.85, p = 0.038) to be independently associated with higher rates of incomplete occlusion at last follow-up. Thromboembolic complications were noted in 1.4% and hemorrhagic complications were found in 0.7% of procedures.CONCLUSIONSIncomplete aneurysm occlusion following placement of a PED was independently associated with age > 70 years, aneurysm diameter ≥ 15 mm, and fusiform morphology. Such predictive factors can be used to guide individualized treatment selection and counseling in patients undergoing cerebrovascular neurosurgery.
Stasis index from hemodynamic analysis using quantitative DSA correlates with hemorrhage of supratentorial arteriovenous malformation: a cross-sectional study
Authors: Lin Te Ming , Yang Huai Che , Lee Cheng Chia , Wu Hsiu Mei , Hu Yong Sin , Luo Chao Bao , Guo Wan Yuo , Kao Yi Hsuan , Chung Wen Yuh , Lin Chung Jung 
Published: April 2019

OBJECTIVEAssessments of hemorrhage risk based on angioarchitecture have yielded inconsistent results, and quantitative hemodynamic studies have been limited to small numbers of patients. The authors examined whether cerebral hemodynamic analysis using quantitative digital subtraction angiography (QDSA) can outperform conventional DSA angioarchitecture analysis in evaluating the risk of hemorrhage associated with supratentorial arteriovenous malformations (AVMs).METHODSA cross-sectional study was performed by retrospectively reviewing adult supratentorial AVM patients who had undergone both DSA and MRI studies between 2011 and 2017. Angioarchitecture characteristics, DSA parameters, age, sex, and nidus volume were analyzed using univariate and multivariate logistic regression, and QDSA software analysis was performed on DSA images. Based on the QDSA analysis, a stasis index, defined as the inflow gradient divided by the absolute value of the outflow gradient, was determined. The receiver operating characteristic (ROC) curve was used to compare diagnostic performances of conventional DSA angioarchitecture analysis and analysis using hemodynamic parameters based on QDSA.RESULTSA total of 119 supratentorial AVM patients were included. After adjustment for age at diagnosis, sex, and nidus volume, the exclusive deep venous drainage (p < 0.01), observed through conventional angioarchitecture examination using DSA, and the stasis index of the most dominant drainage vein (p = 0.02), measured with QDSA hemodynamic analysis, were independent risk factors for hemorrhage. The areas under the ROC curves for the conventional DSA method (0.75) and QDSA hemodynamics analysis (0.73) were similar. A venous stasis index greater than 2.18 discriminated the hemorrhage group with a sensitivity of 52.6% and a specificity of 81.5%.CONCLUSIONSIn QDSA, a higher stasis index of the most dominant drainage vein is an objective warning sign associated with supratentorial AVM rupture. Risk assessments of AVMs using QDSA and conventional DSA angioarchitecture were equivalent. Because QDSA is a complementary noninvasive approach without extra radiation or contrast media, comprehensive hemorrhagic risk assessment of cerebral AVMs should include both DSA angioarchitecture and QDSA analyses.
Comparative analysis of anterior cervical discectomy and fusion in the inpatient versus outpatient surgical setting
Authors: Patel Dil V. , Yoo Joon S. , Haws Brittany E. , Khechen Benjamin , Lamoutte Eric H. , Karmarkar Sailee S. , Singh Kern 
Published: April 2019

OBJECTIVEIn a large, consecutive series of patients treated with anterior cervical discectomy and fusion (ACDF) performed by a single surgeon, the authors compared the clinical and surgical outcomes of patients who underwent ACDF in an inpatient versus outpatient setting.METHODSPatients undergoing primary ACDF were retrospectively reviewed and stratified by surgical setting: hospital or ambulatory surgical center (ASC). Data regarding perioperative characteristics, including hospital length of stay and complications, were collected. Neck Disability Index (NDI) and visual analog scale (VAS) scores were used to analyze neck and arm pain in the preoperative period and at 6 weeks, 3 months, 6 months, and 12 months postoperatively. Postoperative outcomes were compared using chi-square analysis and linear regression.RESULTSThe study included 272 consecutive patients undergoing a primary ACDF, of whom 172 patients underwent surgery at a hospital and 100 patients underwent surgery at an ASC. Patients undergoing ACDF in the hospital setting were older, more likely to be diabetic, and had a higher comorbidity burden. Patients receiving treatment in the ASC were more likely to carry Workers’ Compensation insurance. Patients in the hospital cohort were more likely to have multilevel procedures, had greater blood loss, and experienced a longer length of stay. In the hospital cohort, 48.3% of patients were discharged within 24 hours, while 43.0% were discharged between 24 and 48 hours after admission. Both cohorts had similar VAS pain scores on postoperative day (POD) 0; however, the hospital cohort consumed more narcotics on POD 0. One patient in the ASC cohort had a pretracheal hematoma that was evacuated immediately in the same surgical center. There were 8 cases of dysphagia in the hospital cohort and 3 cases in the ASC cohort, all of which resolved before the 6-month follow-up. Both cohorts demonstrated similar NDI and VAS neck and arm pain scores preoperatively and at every postoperative time point.CONCLUSIONSAlthough patients undergoing ACDF in the hospital setting were older, had a greater comorbidity burden, and underwent surgery on more levels than patients undergoing ACDF at an outpatient center, this study demonstrated comparable surgical and clinical outcomes for both patient groups. Based on the results of this single surgeon’s experience, 1- to 2-level ACDFs may be performed successfully in the outpatient setting in appropriately selected patient populations.
Effect of decompressive craniectomy in the postoperative expansion of traumatic intracerebral hemorrhage: a propensity score–based analysis
Authors: Cepeda Santiago , Castaño-León Ana María , Munarriz Pablo M. , Paredes Igor , Panero Irene , Eiriz Carla , Gómez Pedro A. , Lagares Alfonso 
Published: April 2019

OBJECTIVETraumatic intracerebral hemorrhage (TICH) represents approximately 13%–48% of the lesions after a traumatic brain injury (TBI), and hemorrhagic progression (HP) occurs in 38%–63% of cases. In previous studies, decompressive craniectomy (DC) has been characterized as a risk factor in the HP of TICH; however, few studies have focused exclusively on this relationship. The object of the present study was to analyze the relationship between DC and the growth of TICH and to reveal any correlation with the size of the craniectomy, degree of cerebral parenchymal herniation (CPH), or volumetric expansion of the TICH.METHODSThe authors retrospectively analyzed the records of 497 adult patients who had been consecutively admitted after suffering a severe or moderate closed TBI. An inclusion criterion was presentation with one or more TICHs on the initial or control CT. Demographic, clinical, radiological, and treatment variables were assessed for associations.RESULTSTwo hundred three patients presenting with 401 individual TICHs met the selection criteria. TICH growth was observed in 281 cases (70.1%). Eighty-two cases (20.4%) underwent craniectomy without TICH evacuation. In the craniectomy group, HP was observed in 71 cases (86.6%); in the noncraniectomy group (319 cases), HP occurred in 210 cases (65.8%). The difference in the incidence of HP between the two groups was statistically significant (OR 3.41, p < 0.01). The mean area of the craniectomy was 104.94 ± 27.5 cm2, and the mean CPH distance through the craniectomy was 17.85 ± 11.1 mm. The mean increase in the TICH volume was greater in the groups with a craniectomy area > 115 cm2 and CPH > 25 mm (16.12 and 14.47 cm3, respectively, p = 0.01 and 0.02). After calculating the propensity score (PS), the authors followed three statistical methods—matching, stratification, and inverse probability treatment weighting (IPTW)—thereby obtaining an adequate balance of the covariates. A statistically significant relationship was found between HP and craniectomy (OR 2.77, p = 0.004). This correlation was confirmed with the three methodologies based on the PS with odds greater than 2.CONCLUSIONSDC is a risk factor for the growth of TICH, and there is also an association between the size of the DC and the magnitude of the volume increase in the TICH.
High-resolution in vivo imaging of peripheral nerves using optical coherence tomography: a feasibility study
Authors: Carolus Anne E. , Lenz Marcel , Hofmann Martin , Welp Hubert , Schmieder Kirsten , Brenke Christopher 
Published: April 2019

OBJECTIVEBecause of their complex topography, long courses, and small diameters, peripheral nerves are challenging structures for radiological diagnostics. However, imaging techniques in the area of peripheral nerve diseases have undergone unexpected development in recent decades. They include MRI and high-resolution sonography (HRS). Yet none of those imaging techniques reaches a resolution comparable to that of histological sections. Fascicles are the smallest discernable structure. Optical coherence tomography (OCT) is the first imaging technique that is able to depict a nerve’s ultrastructure at micrometer resolution. In the current study, the authors present an in vivo assessment of human peripheral nerves using OCT.METHODSOCT measurement was performed in 34 patients with different peripheral nerve pathologies, i.e., nerve compression syndromes. The nerves were examined during surgery after their exposure. Only the sural nerve was twice examined ex vivo. The Thorlabs OCT systems Callisto and Ganymede were used. For intraoperative use, a hand probe was covered with a sterile foil. Different postprocessing imaging techniques were applied and evaluated. In order to highlight certain structures, five texture parameters based on gray-level co-occurrence matrices were calculated according to Haralick.RESULTSThe intraoperative use of OCT is easy and intuitive. Image artifacts are mainly caused by motion and the sterile foil. If the artifacts are kept at a low level, the hyporeflecting bundles of nerve fascicles and their inner parts can be displayed. In the Haralick evaluation, the second angular moment is most suitable to depict the connective tissue.CONCLUSIONSOCT is a new imaging technique that has shown promise in peripheral nerve surgery for particular questions. Its resolution exceeds that provided by recent radiological possibilities such as MRI and HRS. Since its field of view is relatively small, faster acquisition times would be highly desirable and have already been demonstrated by other groups. Currently, the method resembles an optical biopsy and can be a supplement to intraoperative sonography, giving high-resolution insight into a suspect area that has been located by sonography in advance.
COMPREHENSIVE EXAMINATION OF PATIENTS WITH PATHOLOGICAL FACIAL SCARS
Authors: Avetikov D.S. , Bukhanchenko O.P. , Ivanyts’ka O.S. , Havryl’iev V.M. , Skrypnyk V.М. 
Published: April 2019

Introduction. The urgency of the issue on diagnosis of pathological head and neck scars has resulted from a growing prevalence of pathological scars. Quite often, patients with pathological scars require psychological rehabilitation. The purpose of our study is to improve the effectiveness of the treatment of scars by identifying a specific type of scar and taking into account the psychological state of the patient. Materials and methods. Under our supervision, there were 60 people with head and neck scars aged 20-50 years (mean age 31.2 ± 11.1 years). In addition, the study involved 20 healthy individuals (mean age 30.9 ± 10.7 years). Clinical examination of patients was supplemented by digital imaging of graphic images in the RGB system in Adobe Photoshop. An integral part of the clinical examination of patients with head and neck scars was a detailed study of their individual personality characteristics. The study included the techniques to assess patients’ general health condition, general activity and emotional state; a questionnaire for evaluating mental stress and the "Integrative Anxiety Test" was also used.
Results. By applying the RGB colour system, statistically significant differences in colour indices were revealed. It was established that all the indicators of intensity of spectral radiation tended to decrease: the red colour indicator tended to decrease on average by 4 units, the same was relevant for the green spectrum indicator. The average values of the reduction of the blue colour intensity were 10 units.
Mental and emotional states of the patients with pathological scars are characterized by specific features that distinguish them from the emotional state of healthy individuals. Significant differences in the emotional states between the emotional states of the patients and healthy individuals included both quantitative (higher rates of most of the investigated parameters) and qualitative parameters (different proportion of components in the structure of the emotional state). The obtained data testify that the patients with pathological scars tend to respond to the traumatic situation (including the situation of the disease) by intense feeling of physiological and psychological discomfort, depressed mood, mental stress, anxiety, hypochondria, exaggeration of negative experience.
Conclusions. The application of the RGB system in the diagnosis of pathological scarring in the face allows us to reliably determine the type of scar, and depending on the scar type to choose the optimal method of the therapy. Inclusion in the comprehensive examination of psychodiagnostic methods is sufficiently feasible and can contribute to the development of an integrated approach in the treatment of pathological scars.
The auction trade in Russia
Authors: Saprykina V. Yu. , Milvanov V. F. 
Published: April 2019

Auction trading is a form of market relations, it is a specially organized operating market in which transactions of purchase and sale are carried out by price competition between buyers. The auction is an open auction of various valuable items: collectible and antique items, precious products, coffee, tea, fur, other raw materials and various finished goods.Conclusion auction trade to a new level contributed to the rapid development of the Internet. Every year the number of online auctions and the number of their participants is growing. Online auctions are one of the most important and promising business models in the world economy. The importance of online auctions is determined by the fact that they are a cost-effective tool in the modern mechanism of market economy, and their implementation contributes to a significant increase in the effectiveness of foreign economic activity of enterprises, the formation of conditions for the development of modern infrastructure of foreign trade.To date, the share of online auctions in the turnover of e-Commerce is up to 25% in theUSand up to 40% inGermany. Despite the fact that the auction is widespread in the world, inRussiatheir conduct for a long time was extremely limited. The reform of the Russian economy has caused the rapid development of auction activities in all its forms.
Islam dan Kristen Di Tanah Bugis Soppeng (Sejarah Dan Perkembangannya)
Authors: Arafah Sitti 
Published: April 2019

Penelitian ini bertujuan mengambarkan sejarah dan perkembangan Islam dan Kristen di Tanah Bugis Soppeng. Jenis penelitian ini adalah kualitatif menggunakan metode pengumpulan data observasi, wawancara dan dokumentasi. Hasil penelitian menunjukkan bahwa Islam dan Kristen menjadi anutan bagi masyarakat Bugis di Tanah Soppeng, yang nota bene bahwa orang Bugis tentulah beragama Islam, namun tidak demikian adanya di Tanah Bugis Soppeng. Tampak bahwa Kekristenan di Sulawesi Selatan lebih dahulu masuknya agama Islam sebagai agama resmi di seluruh kerajaan di Sulawesi Selatan. Kristen masuk di Sulawesi Selatan sekitar abad- ke 15-16 khususnya Katolik yang berlangsung lebih 100 tahun 1530-an-1668). Sedangkan Islam masuk di Sulawesi Selatan disebarkan oleh tiga datuk pada akhir abad ke- 16. Namun demikian walaupun kehadiran agama Kiristen di Sulawesi Selatan, namun pada kenyataan bahwa masuknya Kristen dan Katolik di Tanah Bugis Soppeng diperkirakan tahun 1935-1940, sehingga Islam jauh lebih dahulu menjadi agama anutan masyarakat.
Memahami Konsep Matematika dengan Quantum Learning dan Quantum Teaching
Authors: Fatimah Andriani , Rahman Ulfiani , Prasasti Andi Ika 
Published: April 2019

Artikel ini membahas tentang perbandingan penerapan model pembelajaran Quantum Learning dan Quantum Teaching terhadap kemampuan pemahaman konsep matematika siswa kelas VIII SMP IT Wahdah Islamiyah Makassar. Penelitian ini bertujuan untuk (1) mengetahui kemampuan pemahaman konsep matematika siswa yang diajar dengan menerapkan model pembelajaran Quantum Learning; (2) mengetahui kemampuan pemahaman konsep matematika siswa yang diajar dengan menerapkan model pembelajaran Quantum Teaching; (3) mengetahui perbedaan yang signifikan antara kemampuan pemahaman konsep matematika melalui penerapan model pembelajaran Quantum Learning dengan model pembelajaran Quantum Teaching. Pendekatan penelitian ini adalah kuantitatif dengan jenis Quasi Experiment dengan design Nonequivalent Control Group Design. Sampel pada penelitian ini adalah siswa Kelas VIII B2 dan Kelas VIII B3 yaitu 60 orang dari jumlah keseluruhan siswa kelas VIII 120 orang. Instrumen penelitian yang digunakan adalah soal tes kemampuan pemahaman konsep matematika, lembar observasi dan dokumentasi. Data dianalisis dengan analisis statistik deskriptif dan statistik inferensial. Hasil penelitian menunjukkan bahwa (1) kemampuan pemahaman konsep matematika siswa yang diajar dengan menerapkan model pembelajaran Quantum Learning mengalami peningkatan; (2) kemampuan pemahaman konsep matematika siswa yang diajar dengan menerapkan model pembelajaran Quantum Teaching mengalami peningkatan; (3) terdapat perbedaan yang signifikan antara kemampuan pemahaman konsep matematika melalui penerapan model pembelajaran Quantum Learning dengan model pembelajaran Quantum Teaching.

Kata Kunci: Kemampuan Pemahaman Konsep Matematika, Quantum Learning, Quantum Teaching
Análisis del ciberperiodismo en México, con énfasis en el estado de Sinaloa
Authors: López Ayala Mario Guadalupe , Osuna Flores Israel 
Published: April 2019

Se hace una revisión y análisis del ciberperiodismo en México con énfasis en el estado Sinaloa, tomando en cuenta los principales trabajos de reconocidos investigadores en el ciberperiodismo en Iberoamérica y México y se realizó una investigación sobre el estado actual del periodismo digital en el estado de Sinaloa. En él se contempla los principales antecedentes del periodismo digital a nivel nacional y estado; así como, la discusión sobre la problemática actual y perspectivas a futuro. En México, se han dado casos aislados de trabajos de investigación sobre el desarrollo y actuación de los periódicos digitales mexicanos, registrándose apenas unos pocos textos acerca de esta actividad informativa; todos ellos desarticulados, por lo que no se puede considerar que exista un claro intento a nivel nacional para develar las particularidades del ciberperiodismo mexicano; la academia mexicana tiene un déficit en este punto. Son pocos los trabajos que describen el desarrollo y análisis del periodismo digital en México y escasos antecedentes para el estado de Sinaloa; y que en ambos casos, se tiene una discontinua información, observándose que el ciberperiodismo en México y en Sinaloa está dentro de las primeras fase de su desarrollo. Una tendencia interesante detectada en este análisis fue que varios de los cibermedios mejor valorados pertenecen a la zona noroeste de México, conformada por los estados de Sinaloa, Sonora y Baja California Norte, lo que indica una tendencia de competencia positiva en esa región y un claro avance en el estado de Sinaloa, México.
EXPERIMENTAL RESULTS OF SOFTWARE ALGORITHMIC SYNCHRONIZATION OF DISTRIBUTED RADIO SYSTEM WITH MOBILE CARRIERS
Authors: Kryuchkov I. V. , Noniashvili M. I. , Skachkova A. I. , Filatov A. A. 
Published: April 2019

Introduction. One of the classes of modern radio engineering systems are systems with spatial diversity of transmitting, receiving or transceiving elements. In such systems, an increase of the information content is achieved by signal coprocessing ensuring synchronization in time and phase of the carrier oscillation. Currently, the researchers do not pay enough attention to the requirements for the accuracy of synchronization of distributed systems of different applications, as well as simple and affordable ways to synchronize them.Objective. The paper main objective is the search for technical solutions for clock and phase synchronization without atomic frequency standards and external sources of coordinate-time information.Methods and materials. The paper considers a distributed radio engineering system with non-rigid structure. Each element of the system has reference signal from its own crystal oscillator. The oscillators are not physically aligned. The phases of their oscillations are periodically compared by the method of two-way transmission of synchronizing signals (from one element to another and vice versa). The synchronization technique (software algorithmic approach) is reduced to the coprocessing signal correction according to estimated frequency (phase) drifts. The testing of the proposed technical solution is presented on a hardware model consisting of ten receiving and transmitting modules.Results. The experiment showed that RMS of synchronization errors does not exceeded 12 degrees by phase (for VHF), or 0.2 ns by time. These results are acquired for spatial diversity up to several hundred meters, mutual speed of the modules up to several meters per second and may be extended for higher frequencies (in particular, UHF).Conclusion. The paper proposes a method of multilateral propagation to synchronize distributed radioengineering systems. Combined with software algorithmic technique this method enables to obtain synchronization accuracy in real-time sufficient for coherent diversity technique.