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Anterior cruciate ligament rupture is rare in children and adolescents, and unlike in adults, it occurs as an avulsion fracture at the tibial attachment rather than a mid-substance tear. Proximal avulsion fractures are extremely rare, and bone fragments may not be observed on radiographs in children, resulting in a delayed diagnosis. This paper reports a case of avulsion fracture of femoral attachment of anterior cruciate ligament with delayed diagnosis in a seven-year-old girl. [ABSTRACT FROM AUTHOR]

Currently, with the accelerated development of various electrical components owing to commercialization and technological development of electric vehicles (EVs), efforts are being made to improve product quality by solving electromagnetic interference (EMI) problems between components, thus making electromagnetic compatibility (EMC) tests essential. When quality problems occur, critical issues, such as development delays and increased costs, can occur. Therefore, in this study, we applied a simulation-based modeling method for passive EMI filters (primarily used in power circuits) to reduce EMI and predict conducted emissions (CE). We created 3D EM analysis models and equivalent circuit modeling of passive elements, such as multilayer ceramic chip capacitors (MLCC) and inductors that make up the EMI filter, and analyzed them through EM simulation after 3D modeling the printed circuit board (PCB) of the filter. The filter modeling results were compared with the measured transfer characteristics, with the accuracy of the modeling results evaluated using a feature-selective validation (FSV) method. The results showed excellent consistency (better than fair) from 10 kHz to 108 MHz, i.e., the automotive CE test frequency. [ABSTRACT FROM AUTHOR]

For the initial orbit determination of uncharted space objects, the operation method for obtaining three or more streak images was proposed and a design parameter analysis of a narrow field of view optical observation system was performed for this purpose. The proposed operational concept consists of repetitive forms of point tracking, streak center point prediction, mount gimbal maneuver, and streak image acquisition for unknown space objects. The central point prediction was performed using Kalman Filter based on a constant acceleration model and analysis was performed in terms of telescope mount gimbal maneuver and stabilization performance by fixing the exposure time for streak shooting. As a result of the simulation for the entire optical observation system, the ratio of the error value defined from the telescope center point to the streak center point is within 2% with respect to FOV. Consecutive streak images can be reliably obtained using the proposed system. [ABSTRACT FROM AUTHOR]

Purpose To evaluate the efficacy of physical therapy after intra-articular steroid injection for treating adhesive capsulitis of the hip joint. Materials and Methods From January 2018 to December 2020, among 192 patients diagnosed with adhesive capsulitis of the hip joint, 97 patients selected through a retrospective case-control study considering age and sex, received intra-articular steroid injection (Group A, 51 patients) and non-injection group (Group B, 46 patients). The compliance of physical therapy, Numeric Rating Scale (NRS) and range of joint motion in each group at each treatment time point were compared. Results Patient compliance was significantly higher in Group A: 81.3% in Group A and 70.7% in Group B (p=0.0006). The NRS decreased from 6.4 to 1.4 in Group A and from 6.7 to 1.9 in Group B at the initial visit and at the one-year follow-up, respectively. The NRS was significantly lower at the one-month (p<0.0001), three-month (p<0.0001), six-month (p<0.0001), and one-year (p=0.0006) follow-ups. The range of motion of the joint increased from 47.5 to 85.8 degrees in Group A and from 48.1 to 81.8 degrees in Group B at the initial visit and at the one-year follow-up, respectively. The range of motion was significantly higher at the one-month (p<0.0001), three-month (p<0.0001), six-month (p<0.0001), and one-year (p=0.0014) follow-ups. Conclusion In patients with adhesive capsulitis of the hip joint, physical therapy after intra-articular steroid injection therapy is considered a useful treatment method that can quickly reduce pain with high patients compliance and increase the range of motion of the joint, and obtain high patient satisfaction. [ABSTRACT FROM AUTHOR]

Substantial progress has been made in peripheral nerve surgery, owing to the advances in pathophysiological understanding, microsurgical techniques and the improvement of synthetic materials. Despite this, large gaps caused by trauma, tumor resection and congenital deformities show unsatisfactory results. While primary direct end-to-end tension-free nerve repair remains as the gold standard for surgical treatment, an autologous nerve graft is recommended for nerve gaps greater than 2 to 3 cm. Studies cite remarkable clinical reports with decellularized nerve allografts after overcoming the previous immune suppression and cost issues with allograft nerve transfers. New light is being shed regarding synthetic nerve conduits that combines various cytokines and growth factors. Stem cell studies applying biomolecular and biological engineering technologies also show good results. Despite this, further assessment are required for clinical application because these results are based primarily on animal studies. [ABSTRACT FROM AUTHOR]

This paper defines an effectiveness index for optical continuous observation of unknown space objects and presents a range of design variables combinations that can satisfy the effectiveness index from a telescope/mount control system perspective using integrated simulation. The overall system-level simulation was implemented and the tracking performance was analyzed by considering design variables such as target position prediction and frame rate, image processing time and measurement error, target trajectory characteristics, and maneuver performance of mount gimbal. As a result of the analysis, it was confirmed that the continuous tracking performance of the optical observation system is dependent on the combination of frame rate and mount maneuver performance. In a situation where an optical observation system is designed or a similar system is implemented using COTS, an appropriate combination of parameters between design variables can be found through effectiveness analysis simulation as in this study. [ABSTRACT FROM AUTHOR]

Purpose: This study compared the effects of a buprenorphine transdermal patch (BTDP) on the chest and knee for pain control after total knee arthroplasty (TKA). Materials and Methods: A retrospective case-control study was conducted from August 2018 to August 2019 on 231 patients who underwent TKA. Two hundred cases were selected considering age, sex, and body mass index. Before and after applying the BTDP, the Numeric Rating Scale (NRS), adverse effects and compliance were measured. All measurements in the chest application group (group A=100) and knee application group (group B=100) were compared. Results: NRS was similar in rest between the groups treated with BTDP, but at two days and three days afternoon, five, six, and seven days postoperatively in group B, the NRS was significantly lower than that of group A. The adverse effects of the central nervous system and gastrointestinal system after applying BTDP were significantly lower in group B than in group A. No significant differences in adverse effects of the cardiovascular system and skin were observed between the two groups. Regarding the maintenance of BTDP, group B was significantly higher than group A. Conclusion: The direct application of BTDP after TKA to painful knee joints showed excellent results in early postoperative pain control and can be a useful method for increasing patient compliance by reducing the frequency of adverse effects. [ABSTRACT FROM AUTHOR]

Objectives The purpose of this study is to investigate the interest level, perception and attitude of suicide high-risk group toward the media’s suicide report, and also to provide the fundamental data in order to strengthen both the standard and the recommendation of media coverage in Korea. Methods We analyzed the data from the 2013 The Korea National Suicide Survey. The study included 1500 participants aged between 19 and 75 years. The participants were selected through the regional multi-layer stratification method using the sampling frame of the 2010 Census. One-on-one face-to-face interviews investigated the interest level, opinions, and attitudes toward suicide reports and collected data on past suicide history and demographic data. The collected data were evaluated using multiple logistic regression analysis. A probability level of p < 0.05 was considered statistically significant. Results The suicide high risk groups with histories of suicidal ideations or attempts showed more interest in suicidal reports [suicidal thought odds ratio (OR) = 1.81, 95% confidence interval (CI) = 1.40-2.34 ; suicidal attempt OR = 3.21, 95% Cl = 1.52-6.78]. However, there was no difference among the groups in thought that suicide reports incite suicide (suicidal thought OR = 1.26, 95% Cl = 0.92- 1.73 ; suicidal attempt OR = 0.96, 95% Cl = 0.44-2.09). The suicide high risk groups showed a positive attitude toward suicide reports, but it was not statistically significant (suicidal thought OR = 1.10, 95% Cl = 0.41-2.92 ; suicidal attempt OR = 1.10, 95% Cl = 0.76-1.59). Conclusions We suggest the need of careful attitude of media suicidal reports not to bring about copycat suicides. and also we offer suicide prevention campaign based on media leverage. [ABSTRACT FROM AUTHOR]

Distal humeral nonunion is one of the most concerned complications in elbow trauma. When bone loss at the fracture site is carried out due to nonunion, metaphyseal bone defect occurs. Therefore positioning of anatomical locking plate becomes difficult owing to abnormal bone contour, and fixation of small nonunion fragment is challenging. We introduce a good method of anatomical locking plate fixation with autogenous inlay strut bone graft for internal fixation. This technique is to insert autogenous inlay bone into the proximal medullary canal and hole of distal bone fragment which will lead to achieve correction of the anatomical alignment, length and rotation deformity. The inlay grafting is reduced to the shaft with two crossed K-wires temporarily. Definitive fixation is performed with locking plates, and autogenous bone graft is added at the defect site. [ABSTRACT FROM AUTHOR]

In this paper, the observation performance of the electro-optical telescope system which surveils the unknown space objects, is analyzed by the Modeling & Simulation(M&S). The operation concept for the observation of the unknown space objects using two telescope systems is considered and the M&S models are constructed. Based on the operation concept for observing the unknown space objects, the estimated orbit is generated by Initial Orbit Determination(IOD) and the observation performance is analyzed according to the offset compensation cycle for the estimated orbit. The result of the M&S based analysis in this paper shows that the observation performance increases with the shorter offset compensation cycle, and decreases with the longer offset compensation cycle. Therefore, to improve the performance of the telescope system which surveils the unknown space objects, the observation system with accurate initial orbit determination or shorter offset compensation cycle should be designed and constructed. [ABSTRACT FROM AUTHOR]

Carpal tunnel syndrome is rare in children. When it does occur in children, the most common causes reported are mucopolysaccharidosis and mucolipidosis. The median artery is a transitory vessel that develops from the axillary artery in early embryonic life and does not normally survive until postfetal life. In a small percentage of individuals, however, it persists into adulthood and is frequently accompanied by a bifid median nerve. A persistent median artery can be a cause of carpal tunnel syndrome in adults, but it is extremely rare in children and adolescents. This paper reports a case of a carpal tunnel syndrome caused by a persistent median artery and bifid median nerve in a 13-year-old girl. [ABSTRACT FROM AUTHOR]

Purpose: This study evaluated the efficacy of blood mixed cement for osteoporotic vertebral compression fractures in reducing the complications of percutaneous vertebroplasty using conventional cement. Materials and Methods: This study was performed retrospectively in 80 patients, from January 2016 to January 2017. Porous cement was formed by mixing 2, 4, and 6 ml of blood with 20 g of cement used previously. A tube with a diameter and length of 2.8 mm and 215 mm, respectively, was used and the polymerization temperature, setting time, and optimal passing-time were measured and compared with those using only conventional cement. Radiologically, the results were evaluated and compared. Results: The polymerization temperature was 70.3°C, 55.3°C, 52.7°C, and 45.5°C in the conventional cement (R), 2 ml (B2), 4 ml (B4), and 6 ml (B6), respectively, and the corresponding setting time decreased from 960 seconds (R) to 558 seconds (B2), 533 seconds (B4), and 500 seconds (B6). The optimal passing-time was 45 seconds (B2), 60 seconds (B4), and 78 seconds (B6) at 73 seconds (R), respectively and as the amount of blood increased, it was similar to the cement passing-time. The radiological results showed that the height restoration rates and the vertebral subsidence rates similar among the groups. Two cases of adjacent vertebral compression fractures in the R group and one in the B2 and B4 groups were encountered, and the leakage rate of the cement was approximately two times higher than that in the conventional cement group. Conclusion: In conventional percutaneous vertebroplasty, the procedure of using autologous blood with cement decreased the polymerization temperature, reduced the setting time, and the incidence of cement leakage was low. These properties may contribute to more favorable mechanical properties that can reduce the complications compared to conventional cements alone. [ABSTRACT FROM AUTHOR]

Three-dimensional (3D) printing technology, with additive manufacturing, can aid in the production of various kinds of patient-specific medical devices and implants in medical fields, which cannot be covered by mass production systems for producing conventional devices/implants. The simulator-based medical image demonstrates the anatomical structure of the disease, which can be used for education, diagnosis, preparation of treatment plan and preoperative surgical guide, etc. The surgical guide is used as a patient-specific medical device for guiding incision, resection, insertion, and marking. As 3D printers can output materials that can be inserted into the human body, the patient-specific implant device that reflects the patient’s anatomy and surgical plan could be of relevance. In addition, patient-specific aids, including gibs, splints, prostheses, and epitheses, could be used for a better outcome. Finally, bio-printing is also used to cultivate cells to produce functional artificial tissues. [ABSTRACT FROM AUTHOR]

Suicide is a serious problem worldwide, especially in Korea, but the factors affecting suicide are complex and diverse. Therefore, a medical policy should be developed to help establish an effective national suicide prevention policy in Korea. To reduce suicide rates effectively, some of the current suicide prevention policies need to be improved. This study proposes the following steps to do so: 1) standardizing the suicide attempt management system, 2) strengthening effective counseling programs in the psychiatric field, and 3) strengthening early psychiatric interventions in patients with a physical illness. These improvements should be considered high-priority measures for ensuring successful suicide prevention at the national level. [ABSTRACT FROM AUTHOR]

In an optical observing system, three pairs of observations at equal time intervals are required for the orbit determination method to obtain orbital information of an unknown space objects. In this paper, we propose a method of estimating a streak for acquiring three pairs of observations using one streak image information. Satellite trajectory simulation data were generated for nine cases using the STK program in order to verify the characteristics of the orbit of space object and estimation performance. Simulation was performed by applying three approaches that can estimate the next streak position after a few seconds from one streak image information, and the estimation performance was evaluated. Linear vector method and Kalman Filter method based on the linear assumption tend to increase the estimation error in the region where the nonlinearity is large. However estimation method using the polynomial curve fitting based on the least square method showed smaller and uniform error result than the previous methods. [ABSTRACT FROM AUTHOR]

In this paper, the detection performance of the electro-optical telescopes which observes and surveils space objects including artificial satellites, is analyzed. To perform the Modeling & Simulation(M&S) based analysis, satellite orbit model, telescope model, and the atmospheric model are constructed and a detection scenario observing the satellite is organized. Based on the organized scenario, pointing accuracy is analyzed according to the Field of View(FOV), which is one of the key factors of the telescope, considering pointing angle command error. In accordance with the preceding result, detection possibility according to the pixel-count of the detector and the FOV of the telescope is analyzed by discerning detection by Signal-to-Noise Ratio(SNR). The result shows that pointing accuracy increases with larger FOV, whereas the detection probability increases with smaller FOV and higher pixel-count. Therefore, major specification of the telescope such as FOV and pixel-count should be determined considering the result of M&S based analysis performed in this paper and the operational circumstances. [ABSTRACT FROM AUTHOR]

Compression neuropathy of the ulnar nerve due to anconeus epitrochlearis muscle is rare in adolescents. It is usually known that the hypertrophied muscle in adult or weightlifting athletes compresses the ulnar nerve. There were only few case reports in children and adolescent relevant to athletic activities. In this case, a non-athlete 15-year-old girl developed compression ulnar nerve neuropathy caused by an anconeus epitrochearis muscle. This case is remarkable as an anconeus epitrochearis muscle is uncommon in non-athlete children and adolescent since a literature review revealed no previous report. [ABSTRACT FROM AUTHOR]

Purpose: Two antiseptic solutions were investigated for their effect on bacterial growth inhibition. Materials and Methods: A total of 38 patients were included in this study, who visited Daegu Catholic Medical Center from August 2, 2011 to September 2, 2011. Bacterial culture was performed at the pre-scrub, post-scrub, and postoperation; patients were divided into two groups according to use of povidone iodine (3.75%) and povidone iodine with Softa-Man® as antiseptic agents at the surgical. Results: Comparison between the antiseptic solutions showed a significant difference for the presence of gram positive cocci (p=0.034), however, no difference was observed for the presence of gram positive bacilli (p=0.838). As the scrub time increased, the positive detection ratio of bacteria decreased (p=0.000), and decreased significantly at more than 120 seconds. However, positive detection ratio of bacteria increased significantly at more than 300 seconds in cases with povidone iodine only (p=0.014). Glove wearing time did not have a significant influence on the positive detection ratio of bacteria, and no significant difference was observed between the antiseptic solutions (p=0.143). Conclusion: Considering the positive detection ratio of bacteria when using povidone iodine only, the appropriate scrub time should be between 4 and 5 minutes. When using both antiseptics, at least 2 minutes of scrub time is needed. [ABSTRACT FROM AUTHOR]