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- 저자 : 鄭鉉大 (검색결과 44 건)
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정현대,오봉환,황성규,함인석,박연묵,김승래 慶北大學校 醫科大學 1985 慶北醫大誌 Vol.26 No.4
저자는 1980년 1월부터 1984년 12월까지 경북대학병원 신경외과에 입원된 출혈을 일으킨 남·녀 86명의 전교통 동맥류 환자를 대상으로 하여 연령 및 성별 분포, 동맥류의 크기, 출혈의 빈도, 신경학적 장애 및 수술 치료의 결과 등을 분석, 관찰하였다. 남·녀의 발생비는 1.6 대 1로서 남자에서 높은 빈도는 나타내었으며 연령별 분포는 41∼50세와 51∼60세층에서 전체의 69.7%를 차지하였다. 출혈을 일으킨 동맥류의 크기는 최장경이 6∼10㎜에 속하는 것이 53.5%로서 가장 많았다. 주위 혈관의 기형은 57%에서 나타났으며 A_1의 Hypoplasia(50%)가 가장 많았다. 2회 이상의 출혈은 31.4%에서 있었으며 재출혈의 발생이 1주 미만 및 1∼2주가 각각 37% 및 22.2%였다. 술전 또는 출혈 후 1주를 기준으로 하였을 때 신경학적 장애 정도는 55.9%가 Grade Ⅰ, Ⅱ였고, 44.1%가 Grade Ⅲ, Ⅳ 및 Ⅴ에 속하였다. 40명의 수술군에서 수술의 시기는 마지막 출혈 후 1∼2주와 2∼3주에 시도한 것이 각각 35%였다. 수술치료의 결과는 생존자가 92.5%였으며 72.5%가 Good 상태로 회복되었다. 그리고 사망자는 3명으로서 7.5%였으며 그 중 2명은 Grade Ⅴ에 속하는 환자였다. 술전 신경학적 장애, 연령 및 혈압은 수술 치료의 결과와 밀접한 관계가 있었다. The authors made analyses and observatrions, January 1980-December 1984, on age and sex distribution, the size of aneurysmal sac, bleeding frequency, neurologic defect and the outcome of 40 surgical cases among 86 patient with anterior communicating artery aneurysm at the department of neurosurgery, Kyungpook National University Hospital. The incidence ratio of male and female was found to be higher in males by 1.6 to 1. The age brackets of 41-50 and 51-60 accounted for 69.7 percent of whole subjects. The size of ruptured aneurysmal sac, ranging from 6㎜ to 10㎜, took up the majority of the cases. Fifty-seven percent of the total showed vascular anomalies with A_1 hypoplasia most outstandingly, as high as 50 percent. The breakdown of bledding times following the initial is; 37 percent-less than one week, 22.2 percent-between the first week and the second week. The incidence of bleeding more than twice is 31.4 percent. Breakdowning of clinical grades, just before operation or after a week from bleeding in nonsurgical group is; Grade Ⅰ and Ⅱ : 55.9 percent, and Grade Ⅲ, Ⅳ, and Ⅴ : 44.1 percent. Thiry-five percent of the 40 patients underwent the surgery between the first-second week and second-third week of the last bleeding. The result of the operations are followings; 92.5 percent of survival, with 72.5 percent benefitting good state; 7.5 percent of death including patients of Grade Ⅴ. It was revealed that the age, blood pressure and preoperative status of the subjects are most responsible for operative results.
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정현대,하용수,황성규,함인석,박연묵,김승래 慶北大學校 醫科大學 1986 慶北醫大誌 Vol.27 No.4
We have experienced a case of primary intracranial malignant melanoma. A 15-year-old female was admitted to our hospital with chief complaints of headache, vomiting, and left ophthalmoplegia. Darkly brown colored, fragile tumor was found on the medial third of left sphenoid ridge. The tumor enclosed left supraclinoid portion of the internal carotid artery, optic chiasm, and eroded left anterior and posterior clinoid processes. Nearly total removal of the tumor mass was done and pathological diagnosis was malignant melanoma.
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워터스, 파노라마 방사선사진과 Scanora 방사선사진의 상악동 점막비후 진단 결과의 비교
윤숙자,강병철,정현대 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.2
The purpose of this study was to compare the diagnostic performance of Waters' and panoramic view ; maxillary sinus posteroanterior and lateral scanography of ?? for mucosal thickening of maxillary sinus as well as to identify the utility of ?? for the detection of maxillary sinus disease. The assessment was done at 66 maxillary sinuses in 45 patients and the results were as follows ; 1. Estimation of presence or absence of mucosal thickening. The sensitivity, specificity, and positive and negative predictive value of maxillary sinus posteroanterior and lateral scanography were 0.865, 0.860, 0.921, and 0.805 respectively and slightly higher than those of Waters' and panoramic views, which were 0.832, 0.835, 0.903, and 0.728 respectively. However, paired t-test showed no significant differences in the diagnostic performance of the two pairs of imaging modalities. 2. Estimation of the types of mucosal thickening. The diagnostic accuracy for type Ⅰ, Ⅱ, Ⅲ was 75.3% on Waters' and panoramic view ; 77.9% on maxillary sinus posteroanterior and lateral scanography. It was higher on the latter, but showed no significant differences from that on the former. 3. Reliability of interpretation. In intraobserver and interobserver agreement, both overall rates of agreement and kappa-value were slightly higher on maxillary sinus posteroanterior and lateral scanography than on Waters' and panoramic views. There was no significant differences between the two pairs of imaging modalities. These results suggested that scanogram is a useful diagnostic radiography as well as Waters' and panoramic views for detection of maxillary sinusitis.
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악관절장애 환자의 임상 및 측사위경두개 촬영에 의한 진단과 자기공명영상에 의한 진단의 비교연구
최정희,정현대 大韓口腔顎顔面 放射線學會 1991 Imaging Science in Dentistry Vol.21 No.2
The purpose of this study was to evaluate the validity among the clinical, transcranial radiographic and MRI diagnosis in internal derangement of the temporomandibular joint. Fourty two temporomandibular joints were assessed in twenty one patients who visited the dental department of Chonnam National University Hospital with the complaint of temporomandibular disorder from Oct. 1990 to Oct. 1991. The results were as follows: 1. In the clinically symptomatic 29 TMJs, 26 (89.7%) joints reveal disc displacement and 3 (10.3%) joints reveal normal disc position on MRI. The sensitivity of clinical diagnosis was 0.77, and the specificity was 0.63. 2. In the normal 22 TMJs on the transcranial radiographic finding, 16 (72.7%) joints reveal disc displacement, and 6 (27.3%) joints reveal normal disc position on MRI. In the abnormal 20 TMJs on the transcranial radiographic finding, 18 (90%) joints reveal disc displacement, and 2 (10%) joints reveal normal disc position on MRI. The sensitivity of transcranial radiograph was 0.53, and the specificity was 0.75.
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치과 구내 X-선 촬영기의 사용연한에 따른 해상능에 관한 연구
김선주,정현대 大韓口腔顎顔面 放射線學會 1990 Imaging Science in Dentistry Vol.20 No.2
The purpose of this study was to assess the resolution and focal spot size of dental X-ray machines. Fifty dental X-ray machines were selected for measuring resolution and focal spot size. These machines were used in general dental clinics. The time of installation of the X-ray machine varies from 1 year to 10 years. The resolution of these machines was measured with the test pattern. The focal spot size of these machines was measured with the star test pattern. The following results were obtained : 1. the resolution of dental intraoral X-ray machines was not significantly changed in ten years. 2. The focal spot size of dental intraoral X-ray machines was not significantly increased in ten years. The statistical analysis between the mean focal spot size and nominal focal spot size was significant at the 0.05 level about the more than 3 years used machines.
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