• Investigative Magnetic Resonance Imaging
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• 제22권1호
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• pp.18-25
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• 2018

Purpose: To investigate the various imaging factors associated with aggravation of lumbar disc herniation (LDH) and develop a scoring system for prediction of LDH aggravation. Materials and Methods: From 2015 to 2017, we retrospectively reviewed the magnetic resonance imaging (MRI) findings of 60 patients (30 patients with aggravated LDH and 30 patients without any altered LDH). Imaging factors for MRI evaluation included the level of LDH, disc degeneration, back muscle atrophy, facet joint degeneration, ligamentum flavum thickness and interspinous ligament degeneration. Flexion-extension difference was measured with simple radiography. The scoring system was analyzed using receiver operating characteristic (ROC) analysis. Results: The aggravated group manifested a higher grade of disc degeneration, back muscle atrophy and facet degeneration than the control group. The ligamentum flavum thickness in the aggravated group was thicker than in the group with unaltered LDH. The summation score was defined as the sum of the grade of disc degeneration, back muscle atrophy and facet joint degeneration. The area under the ROC curve showing the threshold value of the summation score for prediction of aggravation of LDH was 0.832 and the threshold value corresponded to 6.5. Conclusion: Disc degeneration, facet degeneration, back muscle atrophy and ligamentum flavum thickness are important factors in predicting aggravation of LDH and may facilitate the determination of treatment strategy in patients with LDH. The summation score is available as supplemental data.

• 한국대기환경학회지
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• 제17권5호
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• pp.425-437
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• 2001

This study is based on the uses meta-analysis methodology to examine the statistical consistency and importance of random variation among results of epidemiologic studies between air pollutants exposure and childhood asthma. Studies for this meta-analysis were conducted by reviewing previous results and by asking researcher active in this field for recommendations. Overall, 10 cases of air pollutants exposures and childhood asthma were reviewed. A variety of statistical methods for meta-analysis have been used to assess the combined effects, to identify heterogeneity, and to provide a single summary risk estimate based on a set of simiar epidemiologic studies. In this study, classification of exposure metircs on air environmental epidemiologic studies are reported for (1) aggravation of childhood asthma by a 50 ppb increase SO$_2$(6 individual studies); (2) aggravation of childhood asthma by a 50 ppb increase NO$_2$(5 individual studies); (3) aggravation of childhood asthma by a 50 ppb increase $O_3$(7 individual studies); (4) aggravation of childhood asthma by a 10$\mu\textrm{g}$/m$^3$increase PM$_{10}$ (4 individual studies); (5) aggravation of childhood asthma by a 1 ppm increase CO (2 individual studies); and (6) comparison of results between a Korean study results and this meta-analytic study. Results of this study indicated that an inverse-variance weighted pooling of the hospital admission risk at a 1ppm increment of CO levels was 1.12% (95% CI : 1.01 ~ 1.24). The hospital admission risk was estimated to increase 5% (95% CI : 1.02~1.08), 6%(95% CI : 1.04~1.09), and 5% (95% CI : 1.02~1.09) with each 50ppb increase of SO$_2$, NO$_2$, and $O_3$, respectively. In addition, our results lead to a small but significant elevation in risk of 2% (RR = 1.02, 95% CI = 1.01~1.04) with each 10$\mu\textrm{g}$/m$^3$increase of PM$_{10}$ among 4 individual studies. We found a small elevation in risk of childhood asthma, and pooled results of 10 epidemiologic studies of childhood asthma using increase a cut-off-point levels of air pollutants showed a few pieces of evidence. The results of this meta-analysis suggested that air pollution associated with an increased incidence of childhood asthma. According to this study, relationship between exposure to air pollutants and childhood asthma in Korea seem to be high than results of this meta-analysis.sis.

• 한방안이비인후피부과학회지
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• 제21권1호
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• pp.113-120
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• 2008

Objective : The purpose of this study was to explore the correlation between efficacy and various factors of the acne patients. Method : We reviewed 30 acne patients who visited Allergy/Derma-cosmetic Clinic at Kyung Hee Neo Medical Center from June, 2006 to December, 2007 and were treated with herbal medicine and acupuncture for 4 weeks. We investigated premenstrual aggravation of acne, facial burning sensation, constipation, Heart Rate Variability(HRV) results and regional distribution of acne. And we evaluated inflammatory acnes according to the Korean Acne Grading System(KAGS). Results & Conclusions : 1. The average age of total patients was 23.0 years old. The most frequent age group was 21-25 years old. Patients evaluated as KAGS Grade 2 were most common. 2. In total patients, inflammatory acne were reduced significantly after 4 weeks of treatment. 3. The result of analysis on premenstrual aggravation of acne, facial burning sensation and constipation, there weren't any difference of treatment results on statistical meaning. 4. The results show that there were significant correlations between the Low Frequency at HRV and the rate of acne reduction. (Pearson correlation = -0.565) 5. If the distribution of acne did not involve the T-zone of the face, chest, or back of the body, inflammatory acne were significantly decreased after 4 weeks of treatment.

• 한국대기환경학회지
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• 제9권1호
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• pp.51-60
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• 1993

In order to study on the cause of visibility aggravation, we have selected the days of low-visibility observed in Seoul with haziness that was below 6km from 12 to 15 LST. According to the examinations, the number of low-visibility days satisfying the criteria is 30 days in 1989, 39 days in 1990, and 35 days in 1991, respectively. The annual number of low visibility days appears to increase mainly due to an increase in emission of air pollutants and in anthropogenic water vapor in the biosphere. The relationship between visibility and air pollutants(TSP, $NO_2, SO_2, O_3$) of selected days is also studied. Air pollution concentrations of selected days are much higher than those of other days. It is observed that the cause of visibility aggravation in Seoul is mainly smog and air pollutants. In particular, the visibility reduction and high $SO_2$ concentrations at Seoul in winter are similar phenomena that occurring with London smog, while the visibility reduction and high $O_3$ concentrations at Seoul in summer are also similar to the type of Los Angeles smog.

• Journal of Korean Neurosurgical Society
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• 제54권4호
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• pp.340-343
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• 2013

Intracerebral schwannomas are rare and there have been none reported in Korea. We present the case of a 25-year-old man with newly developed right-side weakness and recent seizure aggravation. His seizures started approximately 9 years prior to admission. At that time, a 1 cm diameter intra-axial enhancing mass at the left precentral gyrus was found on magnetic resonance image (MRI). After 9 years of observation and treatment with antiepileptic medication, an MRI taken due to symptom aggravation revealed peri-tumoral cyst formation with tumor enlargement. The tumor was surgically removed. Subsequently, right-side weakness diminished and there was good seizure control. Pathologic diagnosis was schwannoma. Schwannoma is a very rare tumor and there are no pathognomonic findings on radiologic images; thus, it is challenging to make a correct diagnosis. However, considering the natural course and excellent prognosis after surgical treatment of this kind of intra-axial mass with benign features, early surgery for diagnosis and proper treatment is highly recommended.

• Perinatology
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• 제29권4호
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• pp.175-179
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• 2018

Pneumatocele (PC) is a thin-walled cyst of the lung that can occur at all ages and with various etiologies. However, there is no fully accepted consensus for the management of PC in a neonatal intensive care unit. Although the management of PC is generally expectant, it is difficult to decide how long conservative management should be maintained, especially under Korea's medical care environment and the parents' worry and anxiety. We report a male neonate, born at $27^{+5}weeks$ gestation, weighing 1,000 g, who had a post infectious PC caused by methicillin-resistant Staphylococcus aureus sepsis. We treated conservatively for about 100 days (roughly 14 weeks), but unfortunately after a few days of chest retraction, acute exacerbation occurred, video assisted thoracoscopic surgery (VATS) was deemed necessary and performed. The purpose of this publication is to describe the clinical course, aggravation and relief after VATS management with a review of the literature.

• Nuclear Engineering and Technology
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• 제51권6호
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• pp.1669-1680
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• 2019

Seismic safety is considered to be one of the key design objectives of AP1000 nuclear power plant (NPP) in strong earthquakes. Dynamic behavior, damage development and aggravation effect are studied in this study for the three main components of AP1000 NPP, namely reinforced concrete shield building (RCSB), steel vessel containment (SVC) and reinforced concrete auxiliary building (RCAB). Characteristics including nonlinear concrete tension and compressive constitutions with plastic damage are employed to establish the numerical model, which is further validated by existing studies. The author investigates three earthquakes and eight input levels with the maximum magnitude of 2.4 g and the results show that the concrete material of both RCSB and RCAB have suffered serious damage in intense earthquakes. Considering RCAB in the whole NPP, significant damage aggravation effect can be detected, which is mainly concentrated at the upper intersection between RCSB and RCAB. SVC and reinforcing bar demonstrate excellent seismic performance with no obvious damage.

• 한국지역사회생활과학회지
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• 제18권1호
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• pp.71-85
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• 2007

This study investigates differences by type of caregiving using data on three groups of caregivers, 177 from home stay situations, 189 from day care centers, and 138 from nursing homes. First, the result shows that characteristics of both caregivers and elders differ by type of caregiving. Second, caregivers in the home stay situation have the highest caregiving burden of the three groups. Third, from examination of the related variables, the caregiving burden of home stay caregivers is affected by family income, caregivers' health, type of job, and whether or not the elder has symptoms of dementia. Also, the study reveals that emotional services for elders reduce the aggravation of family relations and economic burden, but that instrumental services highly increase economic burden. It reveals that caregivers of elders in day care centers, especially those who are in bad health, are more likely to experience feelings of constriction, aggravation of family relations and economic burden. On the other hand, caregivers who receive more emotional services have better experiences in family relations, including relations with the elder. In case of the elders of nursing homes, if the main caregiver is a daughter-in-law, aggravation of family relations is higher than if the main caregiver is a spouse. Finally, the caregiver's burden is affected by their own health and income, and by whether the elder has symptoms of dementia or stroke.

• 한국항해항만학회지
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• 제30권3호
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• pp.227-233
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• 2006

상해를 포함한 북중국 항만들이 빠르게 성장하면서 동북아 허브항을 지향하는 항만간의 경쟁이 치열하게 전개되고, 부산항의 위기론까지 대두되고 있다. 그러나 북중국 항만들의 성장에 관한 낙관적인 전망과 함께 기상 악화 및 지리적 원거리로 인한 운영상의 제약 문제가 제기되기도 한다. 기상 악화 문제는 선박 운항 및 터미널 하역 작업에 직접 영향을 미치기 때문에 항만의 경쟁력을 논할 때 우선 고려되어야 하는 요인 중 하나이지만 기존 문헌은 이러한 항만 운영 외적 요인에 대한 검토가 극히 미흡하다. 따라서 본 논문은 국내 소재 국적 선사 및 외국선사 대리점을 대상으로 상해 및 북중국 항만의 제약 요인을 분석하였다. 조사 결과 응답자들은 북중국 항만의 최대 제약 요인으로서 기상 악화를 꼽았으며, 그로 인한 세부적인 문제점으로서 정기선박의 스케줄 운영 불가, 일정을 맞추기 위해 해당 항만을 건너뛸(skip) 경우 발생하는 유지비용 과다, 화물집하의 어려움, 납기 준수 불가, 영업물량 감소 등을 들었다.

• 척추신경추나의학회지
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• 제7권2호
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• pp.75-81
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• 2012

장요인대 염좌 환자 2명에게 전열침 치료를 시행하여 통증 강도가 증가하였지만 봉독약침 치료를 시행한 후 통증 강도와 요추 가동범위 및 이학적 검진상에서 호전되었음을 보고한다. 이와 같이 봉독약침에 의해 호전 될 수 있는, 염증성 병변을 내재하였거나 진행 될 가능성이 있는 환자에 대한 사전의 감별 진단에 대한 연구 및 전열침 치료의 효과 및 부작용에 대한 체계적인 연구가 추후에 필요할 것으로 사료된다.