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최태민,조익준,송형곤 대한응급의학회 2007 大韓應急醫學會誌 Vol.18 No.4
Purpose: In clinical situations requiring the use or the sputum Gram stain test, the adequacy of specimens is often compromised by improper sample generation by patients. We designed a study to evaluate the effect of good written instruction for sputum expectoration on the outcome of sample adequacy. Methods: Data were collected from adult patients over age 15 at a tertiary teaching hospital emergency department who had the sputum Gram stain test from October 1 to October 31, 2006. Patients were given carefully written instruction cards for sputum expectoration, together with a bottle of mineral water to gargle before expectoration. Patients’ data were compared to a group of patients who visited the same ED during the same month in 2005. Results: The total numbers of sputum tests were 164 in 2006 and 151 in 2005. The number and percentage of adequate specimens increased from 62(44%) in the 2005 patient group to 114(69.5%) in the 2006 patient group (p=0.000). Conclusion: By the simple use of properly written instructions for expectoration and of mineral water for oral gargling before sputum expectoration, the adequacy of sputum specimens for testing can be significantly improved.
Multiple Intracranial High Density Foci after Brain Parenchymal Catheterization
최태민,조규용,임병찬,임준섭,이래섭 대한신경손상학회 2016 Korean Journal of Neurotrauma Vol.12 No.2
Objective: To report an observational investigation of small high attenuated foci in computed tomography (CT) scan followed by brain parenchymal catheterization. Methods: From January 2011 to March 2015, we retrospectively reviewed the 381 patients who had undergone brain catheterization in our clinic and enrolled the patients who had newly developed high attenuation foci in the postoperative CT scans. The brain CT scans were reviewed about the lesion location, Hounsfield Unit (HU) and the time of appearance. Results: Twenty seven of 381 patients had high attenuation foci in CT scans after the procedure. The location of high density lesions was as follows: parenchyma in 9 (33.3%) cases, ventricle in 5 (18.5%), combined in parenchyma and ventricle in 13 (48.1%). The lesions were identified in the catheter tract in parenchymal type, and catheter-lodged frontal horn or choroid plexus in ventricular type. We could not find the calcific foci before the catheter removal, and those were found after removal in all cases. The time of appearance after the removal was variable from 0 to 14 days (mean 4.2, median 3). The regular rules of HU change in CT scans were not found as times go on. Conclusion: The high attenuation foci in CT scans were bone dust originated from skull during operation. Although these lesions did not make troubles, we should clean the operation field before the insertion of brain catheter and we may use another material, like Surgicel to seal up the burr hole instead of bone dust in the end of operation.
최태민,김상진,박무룡 대한기계학회 1993 大韓機械學會誌 Vol.33 No.12
레이저광이 가지는 지향성, 단색성, 공간적 집속성 등의 성질을 이용하는 각종 측정장치는 광섬 유의 발달과 새로운 신호처리계의 개발로 그 적용 범위가 점점 확대되고 있다. 레이저 도플러 신호의 위상차를 이용하여 운동상태의 입자의 크기와 속도를 동시에 측정할 수 있는 측정장치가 80년대에 실용화되어 캐비테이션, 분무노즐, 기름버너, 엔진연소 등 많은 분야에서 다양하게 사 용되고 있다. 이 측정방법은 Durst와 Zare에 의해 도플러 신호의 위상과 입자의 크기는 선형적인 함수 관계가 있음이 밝혀진 이래, Bachalo, Buchhave, Knuhfsen과 Olldag 등에 의해 급속히 발 전되었다. 현재 국내에도 덴마크의 단텍사, 미국의 에어로메트릭스사 등에서 개발한 장비가 3-4 기관에서 사용되고 있다. 이 글에서는 위상도플러법에 의한 입자의 크기측정에 관한 기초 이론을 참고문헌을 인용하여 설명하고, 단텍사에서 개발한 위상도플러 측정장치인 입자운동 해석장치 (PDA)를 사용하여 본 연구실에서 실험한 버너용 압력분사식 노즐에서 분사된 액적들의 국소부분 거동에 대해 소개하기로 한다.
최태민,Choe, Tae-Min 한국기계연구원 1992 硏究論文集 Vol.22 No.-
A mass flow controller(MFC) is commonly used in the semiconductor industries to control the flow rate of various process gases. The measurement and precise control of the of flow rate the gas are the key for a succesful IC fabrication. To eventually design a reliable MFC, a pre-proto type MFC was built and its flow characteristics were investigated. Most of the functional components of the pre-proto type were built for the present study, but the remainder were adopted from a commercial unit. The flow control characteristics were compared with that of a standard MFC. Major dimensions of an MFC for 0-10 SLM capacity were suggested.