• Clinics in Shoulder and Elbow
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• v.10 no.1
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• pp.50-58
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• 2007

Purpose: To report our experience with nine cases of pathologic synovial plica on radiohumeral joint which symptom of painful snapping elbow was improved by arthroscopic resection. Materials and Methods: Between 1999 and 2004, 43 cases of elbow arthroscopy were performed by one surgeon. Eight patients with nine cases showed pathologic synovial plica in conjunction with snapping or posterolateral elbow pain. The mean age of eight patients (man: 7, woman: 1) was 29 years (range $16{\sim}56$ years). All patients had a trial of conservative treatment at least six months (range $6{\sim}16$ months). The diagnosis was confirmed before surgery in six cases and at the time of surgery in three cases. Pain, snapping, and subjective results were evaluated at least 12 months in the average(range $12{\sim}24$). Results: All patients showed a hypertropic lateral synovial plica with local synovitis. Seven of them had an associated lesion of chondromalacia on radial head. One of them was associated with radiocapitellar arthritis and had a wrapping over the radial head. Six patients experienced improved posterolateral pain at the end of study (VAS<1). However, the other two patients had occasional pain with activity. One of them persisted with mechanical symptoms, which was treated with additional arthroscopic procedure. Conclusion: Synovial plica in elbow should be considered as an important entity of common elbow disease, especially when pain in the lateral aspect of the elbow with a snapping sensation during motion is featured in patients. The arthroscopic resection seems to be safe and efficient in the short and long term treatment of plica in the elbow joint.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.38 no.3
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• pp.249-255
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• 2002

This paper describes on the extraction of ship's real-time movement information using a combination full-function ARPA radar and ECS system that displays radar images and an electronic chart together on a single PC screen. The radar target extractor(RTX) board, developed by Marine Electronics Corporation of Korea, receives radar video, trigger, antenna bearing pulse and heading pulse signals from a radar unit and processes these signals to extract target information. The target data extracted from each pulse repetition interval in DSPs of RTX that installed in 16 bit ISA slot of a IBM PC compatible computer is formatted into a series of radar target messages. These messages are then transmitted to the host PC and displayed on a single screen. The position data of target in range and azimuth direction are stored and used for determining the center of the distributed target by arithmetic averaging after the detection of the target end. In this system, the electronic chart or radar screens can be displayed separately or simulaneously and in radar mode all information of radar targets can be recorded and replayed In spite of a PC based radar system, all essential information required for safe and efficient navigation of ship can be provided.

• Herbal Formula Science
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• v.25 no.2
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• pp.135-143
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• 2017

Objectives : This trial aimed to determine if Wasong (Orostachys japonicus) extract can enhance immune system and is safe enough to be approved as a health functional food. Methods : Total 62 people, aged 45 and older, will be recruited to participate in a randomized, double-blind, placebo-controlled clinical trial. This study will compare Wasong extract and placebo. Wasong group will take 1g of Wasong extract, once a day, for 8 weeks. Placebo group will take 1g of crystalline cellulose as placebo, once a day, for 8 weeks. Outcomes will be measured at the baseline, the end of 4th week, and 8th week. Primary outcomes are the ratio of NK cells/total lymphocytes and the ratio of T-helper cells/T-suppressor cells. Secondary outcomes are total white blood cell count, the ratio of neutrophils, lymphocytes, and monocytes in total leukocytes, the ratio of total T cells, T-helper cells, T-suppressor cells, and B cells to lymphocytes, the amount of blood IgM, IgG, IgA, and cytomegalovirus (CMV) IgG, and blood metabolite target &global analysis. Results : This trial was approved by institutional review board of Pusan National University Korean Medicine Hospital (registry number: 2016006), and registered in Clinical Research information Service, one of WHO International Clinical Trials Registry Platform (registry number: PRE20161006-002). Recruitment opened in February 2017 and is supposed to be completed by August 2017. The result is expected to be published by June 2018. Conclusion : This trial will provide clinical information to determine the efficacy and safety of Wasong in enhancing immune system of middle-aged and older people.

• Proceedings of the KWS Conference
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• 2002.10a
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• pp.235-243
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• 2002

Ni-base superalloys are used extensively in industry, both in aeroengines and land based turbines. About 60% by weight of most modern gas turbine engine structural components are made of Ni-base superalloys. To satisfy practical demands, the efficiency of gas turbine engines has been steadily and systematically increased by design modifications to handle higher turbine inlet or firing temperatures. However, the increase in operating temperatures has lead to a decrease in the life of components and increase in costs of replacement. Moreover, around 80% of the large frame size industrial/utility gas turbines operating in the world today were installed in the mid-sixties to early seventies and are now 25 to 30 years old. Consequently, there are greater opportunities now to repair and refurbish the older models. Basically, there are two major factors influencing the weldability of the cast alloys: strain-age cracking and liquation cracking. Susceptibility to strain-age cracking is due to the total Ti plus AI content of the alloy; Liquation cracking is due either to the presence of low melting constituents or constitutional liquation of constituents. Though Rene 41 superalloy has 4.5wt.% total Ti and Al content and falls just below the safe limit proposed by Prager et al., controlled grain size and special heat treatments are needed to obtain crack-free welds. Varying heat treatments and filler materials were used in a laboratory study, then the actual welding of service parts was carried out to verity the possibility of crack-tree weld of components fabricated from Rene 41 superalloy. The microstructural observations indicated that there were two kinds of carbides in the FCC matrix. MC carbides were located along the grain boundaries, while M$_{23}$C$_{6}$ carbide was located both inter and intra granularly. Two kinds of filler materials, Rene 41 and Hastelloy X were used to gas tungsten arc weld a patch into the sheet metal, along with varying pre-weld heat treatments. The microstructure, hardness and tensile tests were determined. The service distressed parts were categorized into three classes: with large cracks, with medium cracks and with small or no visible cracks. No significant difference in microstructure among the specimens was observed. Specimens were cut from the corner and the straight edge of the patch repair, away from the corner. The only cracks present were found to be associated with inadequate surface preparation to remove oxidation. Guidelines for oxide removal and the welding procedures developed in the research enabled crack-free welds to be produced.d.

• Journal of Chest Surgery
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• v.32 no.2
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• pp.171-174
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• 1999

Background: Hyperhidrosis of the palms, axillae and face has a strong negative impact on social and professional life. The present existing non-operative therapeutic options seldom give sufficient relief and have a transient effect. A definitive cure can be obtained by upper thoracic sympathectomy. However, this is offset by the occurrence of a high rate of side effects, such as embarrassing compensatory sweating. Material and Method: From Sep. 1997 to Feb. 1998, 89 cases of the needle(2 mm) thoracoscopic thoracic sympathicotomy were performed. The second thoracic ganglion was resected by cutting with a endoscissors. Result: A bilateral procedure takes less than 25 min and requires just one night in hospital. There have been no mortality or life-threatening complications. One patient(<2%) required intercostal drainage because of pneumothorax. Primary failure occurred in one cases(<2%) and recurrent hyperhidrosis occurred in no cases. The patients with failure was successfully re-sympathicotomy. At the end of postoperative follow-up(median 3 months), 96.6% of the patients were satisfied. Compensatory sweating occurred in 57 cases(64.0%) with fourteen of those cases classified as either embarrassing in 10 cases(11.2%) or disabling in 4 cases(4.5%). Conclusion: Endoscopic transthoracic sympathicotomy is an efficient, safe and minimally invasive surgical method for the treatment of palmar and craniofacial hyperhidrosis.

• Korean Journal of Clinical Pharmacy
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• v.22 no.3
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• pp.211-219
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• 2012

Nonsteroidal antiinflammatory drugs (NSAIDs) are used in the treatment of extensive diseases related to various symptoms; inflammation, pain and fever. NSAIDs work by blocking prostaglandin synthesis, but adverse drug events (ADEs) have been increasing dramatically such as gastrointestinal bleeding, perforation and stenosis, a kind of serious ADEs. Therefore, NSAID-related ulcer complication guidelines have been announced containing various risk factors and symptoms. Thus, this study aims to evaluate of NSAID usage and appropriateness for prevention of NSAID-related ulcer complication based on American journal of gastroenterology (AJG) guideline 2009. Further, the study suggests Korean guideline for prevention of NSAID-related ulcer compared to AJG guideline. For this study, data was collected through electronic medical record (EMR) at Seoul national university of Bundang hospital. The primary end point was a composite of NSAID-related ulcer risk factor, types of NSAIDs, co-prescribed NSAID ulcer prevention drugs and NSAID-related ulcer after taking NSAID. The risk factors include over 65 years, high dose NSAID, previous ulcer history and taking drugs (e.g. aspirin, anticoagulant and steroid) causing ulcer. If a patient has 3 or 4 factors, that patient was classified high risk group. And if 1 or 2 factors that patient was classified moderate risk group. The patient who has no risk factor was in low risk group. I studied 8,120 patients who received NSAID from 1 January 2009 to 31 December 2009. High risk group was 16(0.2%), moderate risk group was 4,364(53.7%), and low risk group was 3,740(46.1%). The results show that high risk group should be prescribed COX-2 inhibitors with ulcer prevention drugs, and moderate or low risk group need traditional NSAIDs with ulcer prevention drugs. This may be different with 2009 AJG guideline because AJG guideline suggested taking COX-2 inhibitor alone in moderate group or taking traditional NSAID alone in low risk group could get higher ulcer complication. The results indicated that choosing preventive drug is important in case that how many risk factors the patients have. The proper drugs would be helpful for safe and effective NSAID usage in each patient group.

• Fire Science and Engineering
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• v.34 no.1
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• pp.121-126
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• 2020

The aim of this study is to suggest ways to capitalize on the golden period for timely response to fire and emergency victims. To implement a system to effectively capitalize on the golden period, there is a need for policy measures as well as legal and social consensus. Precedent research has relentlessly mentioned the need for and feasibility of the priority traffic system for emergency vehicles. To this end, the present study involved an analysis of pilot cases of the priority traffic signal system for emergency vehicles introduced in a city during 26 days, from April 3 to 28, 2017. Out of 58 cases registered with the local 1-1-9 fire house, the number of cases that took advantage of the priority traffic system stood at 16 in response to fire and 11 to first-aid operations. Owing to the system, on average, the response time reduced by 3 min and 50 s in case of fire and by 3 min and 30 s for first aid. There were four complaints registered owing to traffic congestion, and the number of car accidents declined to one from six over the same period in the previous year. Based on these findings, it is safe to say that the priority traffic signal system would be effective for emergency vehicles to capitalize on the golden period if issues identified during the pilot run are resolved.

• Clinics in Shoulder and Elbow
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• v.11 no.1
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• pp.46-52
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• 2008

Purpose: This study examined the outcomes of reconstruction of the coracoclavicular ligaments with using two suture anchors and performing coracoacromial ligament transfer in patients with acromioclavicular dislocation. Material and methods: Forty patients with complete acromioclavicular dislocation were included in this study. According to the preoperative radiographs, 5 patients with AC dislocations were diagnosed as type III, 4 patients as type IV and 31 patients as type V. Two 3.5mm suture anchors with four strands of nonabsorbable sutures were separately placed on the anterolateral and posteromedial portion of the base of the coracoid process to stabilize the distal clavicle. The coracoacromial ligament was then transferred to the undersurface of the distal end of the clavicle for augmentation. Results: At a mean follow-up of 28 months, the average Constant score improved to 97 points. All the patients returned to normal life at an average of 3.2 months postoperatively. At the last follow-up, 37 patients achieved anatomical reduction and three patients showed complete redislocation. However, the clinical results of the patients with redislocation were satisfactory. Conclusion: Anatomical coracoclavicular reconstruction using two suture anchors and coracoacromial ligament transfer for treating complete acromioclavicular dislocation is a safe, effective procedure for restoring a physiologically stable acromioclavicular joint.

• Korean Journal of Clinical Pharmacy
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• v.27 no.2
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• pp.92-98
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• 2017

Background: Nebulized colistimethate is increasingly used, because there are problems such as renal dysfunction and low distribution within the lungs when colistimethate is administered intravenously. This study was designed to compare and analyze the changes in renal function by of nebulized colistimethate treatment for its safe administration. Methods: This study retrospectively reviewed the electronic medical records of adult patients above 19 years old, receiving only the nebulized colistimethate at least 4 days in Yonsei university health system from Nov 2014 to Aug 2015. Acute kidney injury (AKI) was determined by using the RIFLE criteria (Risk, Injury, Failure, Loss and End-stage renal disease) according to serum creatinine (SCr) levels before and after use of nebulized colistimethate. Results: 48 patients were included our study and their SCr increased significantly after nebulized colistimethate treatment ($SCr_0$ vs. $SCr_1$; $0.85{\pm}0.80$ vs. $1.00{\pm}0.82mg/dL$, n=48, p<0.001), but the changes were in normal range according to the standards at Yonsei university health $system^a$. Among 48 patients, 38 patients were in the non-AKI group (79.2%), and 10 patients developed AKI (20.8%). Within the AKI group, 2 patients were in the Injury group (20%) and the other 8 in the Risk group (80%). Conclusion: There was no significant difference in age, dosage and duration of treatment between AKI group and non-AKI group (p>0.05). The study has a significance in that it reviewed the safety of nebulized colistimethate only treatment to national patients, analyzing its nephrotoxicity. It has confirmed that nebulized colistimethate is a safer method than intravenous injection, and requires to establish a guideline for the use of nebulized colistimethate in further studies with broader patient groups. $^a$ : SCr Male 0.68-1.19 mg/dL, Female 0.49-0.91 mg/dL.

• Journal of Korean Home Economics Education Association
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• v.32 no.3
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• pp.63-79
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• 2020

This study aimed at analyzing the food safety units of technology and home economics textbooks, as 'safety' emerged as a key concept in the 2015 revised curriculum. From each textbook, the main text, auxiliary elements(including tables, figures, etc.), and related activities were analyzed. According to the results, first, the main texts emphasized the importance of food selection(3.08 pages), food safety hazards(2.93 pages), safe storage and management of food(2.63 pages), and meal preparation with safety and hygiene(0.98 pages). Secondly, when the auxiliary elements were examined, the food safety content was most often presented in the form of tables/illustrations/pictures, followed by supplementary learning materials, activities, captions, end-of-chapter summaries, the chapter introduction and review quiz, and unit introduction. Thirdly, most activities were individual activities rather than small group or collective activities and were focused on investigation, evaluation, craft, application, implementation, inference and judgment, utilization, and proposition. In conclusion, it is recommended for textbooks to evenly distribute the content in the main texts and auxiliary elements, and include more group activities when developing textbooks in the future.