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백내장수술 건수의 변화 분석: 국민건강보험공단 자료 2013-2018
김승헌,황진영,엄영섭,강수연,김효명,송종석 대한안과학회 2020 대한안과학회지 Vol.61 No.7
Purpose: In this study, we examined change in the number of cataract surgeries from 2013 to 2018, since the implementation of institutional changes in 2012, and the introduction of diagnosis-related groups (DRGs) and a gradual reduction in selective-medical expenses from 2014. Methods: Based on data from the main surgery statistical yearbook provided by the Korea National Health Insurance Service (KNHIS), we extracted the number of cataract surgeries nationwide by year from 2013 to 2018. Data were divided by sex, age, regions, and level of healthcare providers in an effort to understand changes that occurred in the number of cataract surgeries and the reasons for these changes. Statistical analysis was carried out using joint point regression. Results: The total number of cataract surgeries per 100,000 people increased by 32.9% over the six-year period, with an annual average increase of 5.9%. Females (58.0-59.2%) had more cataract surgeries than males (40.8-42.0%). Additionally, the number of cataract surgeries per 100,000 people rose over the six-year time frame for those aged under 40 years, and for those in their 40s, 50s, and 60s. In terms of regions and patients’ residence, urban areas such as Seoul, Pusan, and Daegu showed an increase in surgeries performed; most provinces, however, with the exception of Jeju Island, indicated a relative decline in cataract surgeries. There was no difference in the number of cataract surgeries performed over the six-year period in terms of the level of healthcare providers. Conclusions: The number of cataract surgeries per 100,000 people rose over the six-year period between 2013 and 2018. By region, an increasing trend was observed in urban areas; however, the level of the healthcare providers did not appear to have an effect on the number of cataract surgeries performed. 목적: 2012년 7월 이후 포괄수가제 도입과 2014년부터 선택진료비의 단계적 폐지라는 제도적 변화가 있었다. 이에 따라 2013년부터 2018년까지 백내장수술 건수에 어떠한 변화가 있었는지 알아보았다. 대상과 방법: 국민건강보험공단에서 제공하는 주요 수술 통계 연보 자료를 사용하였다. 2013년부터 2018년까지 전국 백내장수술 건수를 연도별로 파악하고, 이를 다시 성별, 연령별, 지역별, 그리고 의료기관 종별로 나눈 후, 각각의 백내장수술 건수에 어떤 변화가 나타났는지 알아보았다. 통계는 Joint point regression 방법을 이용하였다. 결과: 인구 10만 명당 백내장수술 건수는 6년간 총 32.9% 증가하였고, 해마다 연평균 5.9% 증가율을 보였다. 성별에 따른 수술 건수는 지난 6년간 여성(58.0-59.2%)이 남성(40.8-42.0%)에 비해 높았다. 40대 이하, 40대, 50대, 60대 연령군에서는 10만 명당 수술 건수가 증가 추세를 보였다. 지역별 구성 비율은 서울, 부산, 대구와 같은 대도시는 증가한 반면, 제주도를 제외한 대부분의 도 단위에서는 감소하는 경향을 보였다. 환자의 거주지를 기준으로 타지역에서 받는 수술 건수의 비율은 서울, 부산, 대구와 같은 대도시에서 증가 추세를 보였다. 의료기관 종별에 따른 수술 건수 구성 비율에는 차이가 없었다. 결론: 단위 인구 10만 명당 백내장수술 건수는 증가하는 추세를 보였다. 지역별로는 대도시 쏠림 현상은 관찰되었으나, 전국 단위의 상급종합병원으로의 쏠림 현상은 나타나지 않았다.
한국인의 후경골 신경 자극에 의한 체성감각 유발전위 반응의 정상치
김승헌,임영진,김태성,김국기,이봉암,임언 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.2
This study was undertaken to obtain the normal somatosensory evoked potential pattern from stimulation of the posterior tibial nerve in order to provide basic data for clinical use in diagnosis and management of patients with brain and spinal cord lesions. Thirty-six patients, free of neurological disease and 14 volunteers were tested with 4-Channel Nicolet CA 1000 Clinical Averager. There were 26 male and 24 female, ranging in height from 156 to 178 centimeter, with a mean height of 165.2 centimeter. the results were as follows : 1) All lumbar waves(LP1. LN1) and early cortical waves(P1, N1, P2, N2) were easily identified in all of normal subjects, but P3 was obtained in 52% of them. 2) Mean latency of each wave was P1(38.10msec. 2.23), N1(47.04msec.±2.18), P2(N59.98msec.±2.97), N2(76.48msec.±4.97), LP1(17.99msec.±1.75) and LN1(20.72msec.± 1.53). 3) There was significant correlations between height of individuals and latency of the P1 and LP1. 4) Condction time between LN1 and P1 was 16.55msec.±1.03 and mean latency of left to right difference was 0.23msec.± 0.19.
시효처리와 마모체가 치과용 콤포짓트 레진의 마모에 주는 영향
김승헌,임범순,문현정,이용근,김철위 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4
Over the last decade, the use of posterior resin composites has grown considerably. Wear resistance of restorative materials is important for clinical longevity, esthetics, and resistance to dental plaque. The purpose of this study was to evaluate the effect of artificial saliva and 75% ethanol solution on the wear resistance of composite resins by measuring the amounts of wear, and compare the effect of antagonistic materials on the wear resistance of composite resins. Four universal composite resins (Z100, Aelitefil, Spectrum, and Unifill F) and two condensable composite resins (Surefil and Synergy Compact) were measured. Cylinder type specimens were light-cured for 40 sec on the wear surface, and 20 sec on each side surface. The surface for wear testing was polished by 600 grit SiC paper. Three different antagonistic materials (600 grit SiC paper, amalgam, and procelain) were used as an antagonist for 2-body wear test. After speciments were aged in 37℃, artificial saliva and 75% ethanol solution for specific periods (1 day, 1 month and 2 month), 2-body wear testing was performed by the FRP-2000 friction tester with applying 500 g load (80 kPa) to the specimen. The wear test was performed for 10 min and 30㎖ distilled water was used as lubricant. Amount of wear was measured by microscopic measuring device of Micro Hardness Tester in 0.1㎛ scale. There was significant difference in wear resistance of composite resins (p<0.05). Composite resins with filler content below 59 vol.% showed higher wear resistance that composite resins those with filler content above 62 vol.%. In composite resins from 1 day to 1 months (p<0.05). On the contray, the wear amounts of groups which filler fraction were above 62 vol.% did not show any significant differences with increasing aging period (p>0.05). In 1 day aged groups, the wear amounts of the groups aged in 75% ethanol solution were more than those of the groups aged for 1 month (p=0.045) and Spectrum group aged for 2 month (p=0.006). Amounts of wear were significantly decreased with changing antagonist from 600 grit SiC paper to amalgam or porcelain (p<0.05).
북방전복 종묘생산을 위한 농축 규조류 Caloneis schroederi와 Rhaphoneis sp.의 효과
김승헌,김미정,박세진,허성범 한국패류학회 2013 The Korean Journal of Malacology Vol.29 No.3
Even though seedling production of Haliotis discus hannai has fully developed, the culture of benthic diatom as a live food for larvae is still a barrier to solve in commercial hatchery. The farmer depends on mixed microalgae which are non-selectively attached on the plate by flowing of natural seawater. The adequate diatom on the plate for the larvae in terms of quality and quantity is always significant bottleneck in the hatchery. In this study, two benthic diatom species, Caloneis schroederi and Rhaphoneis sp. were separately cultured in mass and inoculated to four tons' settlement tank of the larvae. And the larvae and the spats were cultured for nineteen and nine weeks, respectively. The result on seedling production of H. discus hannai with this method was compared to that of the farmer's traditional method as a control. With regard to variation of species composition of benthic diatom on the plate, C. schroederi and Rhaphoneis sp. were dominant for first three weeks after inoculation. But the diverse diatoms mainly, Navicula, Amphora, Cylindrotheca, Licmophora, Pleurosigma began to attache on the plate from the 4th week. The larvae attached 2.5 times more in C. schroederi tank than in the control tank. The final total biomass of the seeds in Rhaphoneis sp. tank was 3.2 times more than that of the control tank. The retared-spats in the seedling production also showed significantly higher growth and survival in the spat fed Rhaphoneis sp. or C. schroederi than those in the control group. We suggest that C. schroederi is proper for settlement of the larvae and Rhaphoneis sp. is appropriate for the growth of the larvae and spats in the commercial hatchery of H. discus hannai.