• 대한교통학회지
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• 제21권4호
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• pp.67-77
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• 2003

본 연구는 교차되는 도로의 교통량 변화에 따른 비보호좌회전 적용기준에 대한 연구이다. 분석에 이용된 도구는 Transyt-7F모형이며 대향직진교통량에 대한 비보호좌회전 가능교통량을 찾기 위해서 좌회전교통량을 점진적으로 증가시켜 보호좌회전보다 유리한 범위를 구하는 방법을 이용하였다. 이 때에 사용된 효과측정기준은 교차로전체의 차량당 평균정지지체시간이다. 도출된 요 결론을 보면 (1)교차도로의 교통량이 적을수록 비보호좌회전 가능대수는 더 크고 교차도로의 교통량비가 0.6일 때는 1.0일 때에 비해 약 50% 큰 값을 나타냈는데 대향직진교통량이 클 때는 그 차이가 크지 않았다. (2)교통안전시설실무편람의 기준과 비교해 보면 교차도로의 교통량비가 0.6일 때의 기준과 가장 유사하게 나타났으며 0.8과 1.0배 일 때는 편람의 기준보다 낮은 값을 보였다. (3)또한 차로당 대향직진교통량에 따른 비보호좌회전 가능대수는 접근로의 차로수가 클수록 더 작은 값을 나타내었으며 차로당 교통량의 곱을 비보호좌회전 기준으로 쓰기에는 상관관계가 상대적으로 높지 않은 것으로 평가되었기 때문에 신중을 기해야할 것으로 보인다.

• 대한치과보철학회지
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• 제43권2호
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• pp.218-231
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• 2005

Statement of problem. In the partially edentulous patients, removable partial dentures have been working as a important treatment modality. Clasps, a kind of direct retainers, received some amount of stresses during the insertion and removal of partial denture on the abutment tooth. Purpose. The study is to investigate stresses of the different clasps. Material and methods. In order to investigate the degree of stresses, maxillary partial edentulism (Kennedy Class II modification I) was assumed and removable partial dentures were designed on it with three kinds of metallic materials; cobalt-chromium alloy, type IV gold alloy and commercially pure (c.p.) titanium. Aker's clasp was applied on the left second molar. RPA (mesial rest-proximal plate-Aker's) clasp was on the left first premolar and wrought wire clasp was on the right first premolar. Three dimensional, non-linear, dynamic finite element analysis method was run to solve this process. Results. 1. Cobalt-chromium alloy had the highest von Mises stress value and c.p. titanium had the lowest one irrespective of the types of clasps. 2. In the Aker's clasps, stress on the retentive tips was shown shortly after the appearance of stresses of the middle and minor connector areas. These time lag was much shorter in the RPA clasps than in the Aker's clasp. 3. In general. retentive tips of wrought wire clasps had much less amount of stress than other clasps. Conclusion. The amount of stress was the highest in the RPA clasp and the lowest in the wrought wire clasp, in general.

• 대한두개안면성형외과학회지
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• 제11권1호
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• pp.45-48
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• 2010

Purpose: After surgical interventions of mandible fractures, facial asymmetry can be occurred, and it leads to serious problems for patients. This can be solved by mandible angle ostectomy. Methods: A 19-year-old male underwent percutaneous surgical intervention for left mandibular angle and right parasymphyseal fractures 3.5 years ago. The left angle was protruded compared to the other side. Using a percutaneous approach, $4.5{\times}1cm$ sized piece of mandible angle was sawed off. For the right angle, intraoral approach was performed for angle ostectomy, and the angle was sawed off by a size of $4{\times}1cm$, using a pattern based on the piece from the left side. Results: After surgery, no complications such as subcondylar fractures, refractures, insufficient corrections, secondary angle formations, hematomas, and transient nerve palsies were seen, and symmetric correction of mandible angles were done. Conclusion: In facial asymmetries due to mandibular fractures, mandible ostectomy could be a solution. Using the bone section from the contralateral side, measurement of the amount of bone sawed off was possible, and via percutaneous approach on the previously operated site with simultaneous scar revision, and intraoral approach for the contralateral side, cosmetically satisfactory result was obtained.

• Asian-Australasian Journal of Animal Sciences
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• 제13권4호
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• pp.483-486
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• 2000

The influence of feed allowance on intake and nutrient utilization by Barbari goats given green maize (Zea mays) and potential feeding value of left-overs were studied. The goats were offered food at 3 levels to give left-overs of about 20% (T-1), 35% (T-2) and 50% (T-3) DM of offered amount. A marked effect of refusal rate on intake and digestibility of nutrients was found. The DMI, g/kg $W^{0.75}$ increased from 39.86 in T-1 to 50.91 and 66.55 g in groups T-2 and T-3, respectively. Allowing selective consumption at higher levels (T-2 and T-3), the intake of TDN and DCP from green maize was found not only to meet the maintenance requirement but provided surplus energy and protein for substantial production. The variability in diet selectivity between goats under different treatments was pronounced. As the level of food excess increased to T-3, the left overs had a higher IVDMD and crude protein and decreased cell wall constituents (p<0.05). Considering the substantial increase in intake and digestibility from feeding green maize at high allowances to goats, further studies are needed to develop practical feeding strategies.

• Journal of Chest Surgery
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• 제52권1호
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• pp.40-43
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• 2019

Epiphrenic diverticula are known to cause a series of complications. We report the case of a 54-year-old woman who was diagnosed with an epiphrenic diverticulum at a regular checkup in November 2006. Ten years later, she presented with massive hematemesis. Imaging studies revealed an epiphrenic diverticulum measuring 7.8 cm in diameter and a large amount of bleeding inside the diverticulum. Computed tomography showed fistula formation between the diverticulum and the left lower lobe of the lung, leading to the development of a pulmonary abscess. Diverticulectomy and $180^{\circ}$ posterior partial fundoplication were performed transabdominally. The pulmonary abscess was treated with antibiotics alone. She was discharged 16 days after the operation without any complications over 7 months of follow-up.

• Tuberculosis and Respiratory Diseases
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• 제39권6호
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• pp.554-558
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• 1992

A 38 years old man had been treated as a pulmonary tuberculosis by the positive result of acid fast stain of bronchial washing from the focal infiltrative lesion at left lower lobe. On radiologic examination after one year treatment, there was an aggravation of lesion at left lower lobe with moderate amount of pleural effusion at the same side. After 11 weeks, follow up chest film disclosed bilateral pleural effusion. The pleural fluid of both side was pus in gross appearance with low pH, high LDH, low glucose and high protein. Pleurodectomy was performed to remove the loculated empyema with the thickened pleura of right thorax. This pleuro-pulmonary lesion can be easily misdiagnosed as a tuberculous lesion if it is not taken into consideration as a possible diagnosis.

• Journal of Chest Surgery
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• 제33권3호
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• pp.257-261
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• 2000

Pulmonary arteriovenous fistula can occur in a variety of clinical situations including liver diseases, infections, metastatic carcinomas, systemic disorders, and after the palliation of congenital heart diseases. A 72-day-old male infant with Tetralogy of Fallot and pulmonary atresia underwent surgical correction without difficulty. However, ventilator weaning in the ICU failed initially because of an unexplained postoperative hypoxemia(FiO2: 0.8, PaO2: 40 mmHg, SaO2: 80∼90%). Postoperative follow-up lung perfusin scan at postoperative 15 days showed right-to-left shunt(33.6%) and ventilator weaning was performed on the 20th day after the operation (FiO2: 0.4, PaO2, 50mmHg, SaO2: 86.9%). Arterial oxygen saturation under room air was 80∼85% at 7 months postoperatively. One and half year follow-up lung perfusion scan showed decreased amount of right-to-left shunt (11.2%). We report a case with a review of the literatures.

• 대한치과교정학회지
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• 제51권3호
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• pp.145-156
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• 2021

Objective: The aim of this retrospective study was to assess the midfacial soft tissue changes following maxillary expansion using micro-implant-supported maxillary skeletal expanders (MSEs) in young adults by cone-beam computerized tomography (CBCT) and to evaluate the correlations between hard and soft tissue changes after MSE usage. Methods: Twenty patients (mean age, 22.4 years; range, 17.6-27.1) with maxillary transverse deficiency treated with MSEs were selected. Mean expansion amount was 6.5 mm. CBCT images taken before and after expansion were superimposed to measure the changes in soft and hard tissue landmarks. Statistical analyses were performed using paired t-test and Pearson's correlation analysis on the basis of the normality of data. Results: Average lateral movement of the cheek points was 1.35 mm (right) and 1.08 mm (left), and that of the alar curvature points was 1.03 mm (right) and 1.02 mm (left). Average forward displacement of the cheek points was 0.59 mm (right) and 0.44 mm (left), and that of the alar curvature points was 0.61 mm (right) and 0.77 mm (left) (p < 0.05). Anterior nasal spine (ANS), posterior nasal spine (PNS), and alveolar bone width showed significant increments (p < 0.05). Changes in the cheek and alar curvature points on both sides significantly correlated with hard tissue changes (p < 0.05). Conclusions: Maxillary expansion using MSEs resulted in significant lateral and forward movements of the soft tissues of cheek and alar curvature points on both sides in young adults and correlated with the maxillary suture opening at the ANS and PNS.

• 산업융합연구
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• 제19권6호
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• pp.81-91
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• 2021

본 연구는 보수볼을 이용한 발목 근력 강화 운동과 테이핑이 엄지발가락가쪽휨증 환자의 정적과 동적 발바닥 압력에 어떠한 영향을 미치는지 알아보고자 실시하였다. 대상자는 엄지발가락가쪽휨증을 가지고 있는 20대 남녀 26명이며, 테이핑군(Taping group, TG; n=13)과 발목 강화 운동군 (Ankle strengthening group, ASG; n=13)으로 무작위로 배치하였고, 각 군은 총 4주에 걸쳐 해당 중재를 실시하였며, 중재 전과 후에 정적, 동적 발바닥 압력을 측정하였다. 집단 간 변화량의 차이를 알아보기 위해 독립 T검증을 실시하였고, 집단 내의 사전-사후값의 측정값 차이가 유의한지 알아보기 위해 대응표본 T검증을 실시하였다. 통계적 유의수준은 α= .05로 설정하였다. 발의 전체 체중에 대한 비율(Foot)은 왼쪽 발의 ASG가 TG에 비해 집단 내 변화량이 유의하게 감소하였고(p<.05), 발의 표면적(Surface area)에서는 오른쪽 발의 TG가 ASG에 비해 집단 내 변화량이 유의하게 증가하였다(p<.05). 발의 엎침 운동의 정도(MP/change ratio)는 오른발의 TG가 ASG에 비해 집단 내 변화량이 유의하게 감소하였고(p<.05), 발의 힘(Force)에서는 왼발의 TG가 ASG에 비해 집단 내 변화량이 유의하게 증가하였으며(p<.05), 집단 간의 변화에서는 TG의 변화량이 ASG의 변화량보다 유의한 차이가 나타났다(p<.05). 따라서 보수볼을 이용한 발목 강화 운동과 테이핑은 엄지발가락가쪽휨증을 가진 환자에게 효과적인 변화를 주기에는 부족하다고 할 수 있다.

• Korean Journal of Radiology
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• 제1권4호
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• pp.208-211
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• 2000

We present a case in which an arterial rupture occurring during embolization of an arteriovenous malformation of the left occipital lobe with a flow-directed microcatheter, was successfully sealed with a small amount of glue. We navigated a 1.8-Fr Magic catheter through the posterior cerebral artery, and during superselective test injection, extravasation was observed at the parieto-occipital branch. The catheter was not removed and the perforation site was successfully sealed with a small amount of glue injected through the same catheter. Prompt recognition and closure of the perforation site is essential for good prognosis.