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안태완 ( Tae Wan Ahn ),조준필 ( Joon Pil Cho ),지훈상 ( Hoon Sang Chi ),김병로 ( Byung Ro Kim ) 대한외상학회 1991 大韓外傷學會誌 Vol.4 No.1
The management of retroperitoneal hematomas remains to be confusing to many surgeons because it often does not correlated well with the underlying mechanism of injuries and the treatment may differ considerably. So we reviewed 70 patients who had been admitted due to traumatic retroperitoneal hematomas at Young Dong Severance Hospital, Yonsei University College of Medicine from January 1986 to December 1990. 70 patients had retroperitoneal hematoma among 260 who had sustained abdominal trauma (blunt injury: 180, penetrating injury: 80). The most common cause was pedestrianauto accident who accounted 33 patients. According to Selivanov, the retroperitoneal hematoma is classified as Zone I (central), II (flank) and III (pelvic). In our series, the Zone I retroperitoneal hematoma consisted 18.6%, Zone II 31.4% and Zone III 58.6% ; the pelvic bone fracture was the most frequently implicated with retroperitoneal hematoma. Exploratory laparomy was performed in 27 patients and 43 patients were treated conservatively. 24 patients had hypovolemic shock at the emergency room and 5 of them expired (mortality rate: 20.8%). 12 patients required 6-15 units of blood and 3 of them died (mortality rate: 25%). 5 patients rquired more than 16 units of blood and 2 died (mortality rate: 40%). 14 patients recieved ventilatory care for more than 24 hours and 5 died. The overall mortality rate was 8.6% (6 out of 70).
지훈상 ( Hoon Sang Chi ),안태완 ( Tae Wan Ahn ),심강섭 ( Kang Sup Shim ),조준필 ( Joon Pil Cho ),김병로 ( Byung Ro Kim ) 대한외상학회 1990 大韓外傷學會誌 Vol.3 No.2
Pelvic fracture due to high energy forces such as motor vehicle accidents, fall from height, and industrial crush injuries-has become one of the most serious injuries. In addition to life threatening hemorrhage itself and post-hemorrhagic complications (post-traumatic respiratory distress syndrome, sepsis, multiple organ failures), local and distant associated injuries, deformities and disabilities are all potential problems for a patient with pelvic fracture. So it is not enough to emphasize the need for an accurate and a rapid diagnosis of associated injuries of hemodynamically stable or unstable patient with pelvic fracture. We retrospectively reviewed medical records of 100 cases of abdominal or perineal injuries associated with pelvic fracture, which had been admitted to departement of General surgery, Yonsei University College of Medicine. During recent 5 years from Jan. 1984 to Dec. 1988. Laparatomy was performed in half of 100 cases. The most common type associated with abdominal injury was retroperitoneal hematoma in 33%. Twenty one patients received transfusion more than 10 units. The overall mortality rate was 6%. The causes of death were sepsis with multiple organ falilures in 3 patients and irreversible hypovolemic shock in 3 patients. In order to manage appropriately hemodynamically stable or unstable patients of pelvic fracture associated with surgical problems we present a management protocol.
Photomask 고해상도 검사기에서 설계 데이터 비교 알고리즘
김회섭(Hoi Sub Kim),오창석(Chang Seog Oh),안태완(Tae Wan Ahn) 한국산업응용수학회 2006 Journal of the Korean Society for Industrial and A Vol.10 No.1-1
Photomask 고해상도 검사기를 개발함에 있어서 기계 설계, 제어 설계, 소프트웨어 설계 등 3개의 카테고리가 필요하다. 그 중에서 소프트웨어 설계는 CAD 데이터와 Photomask로부터 카메라로 읽어 들인 실제 영상과의 비교를 통하여 불량을 검출한다. 픽셀 단위로 비교하기 때문에 전체 영역이 커서 블록으로 나누어서 비교하는 블록 매칭 알고리즘을 사용한다. 그리고 기계 조립 정도에서 오는 오차를 보정하기 위하여 Calibration 알고리즘을 쓰고, Photomask의 곡면을 보정하기 위하여 카메라 사전 초점 알고리즘을 제시한다. Three categories such as the design of a machine. control and software are necessary in the development of the photomask inspection machine with high resolution. Among them. the design of a software detects inferiority through the comparison of CAD data and real data read by camera from photomask. The block matching algorithm is used since the domain is large and the comparison of data by pixel is accomplished. To correct the error arising from the assembly of a machine. calibration algorithm is used and prefocusing algorithm is suggested to correct the surface of the photomask.
Formalin 도포요법으로 치료한 출혈성 방사선 직장염 1예 : 증례 보고
이상인,박효진,손승국,박인서,정준근,송종원,안태완 대한소화기내시경학회 1996 Clinical Endoscopy Vol.16 No.5
Hemorrhagic radiation proctitis is infrequently seen in patients receiving pelvic irradiation. The treatment of hemorrhagic ralation proctitis is often difficult. Many patients need reyeated hospitalizations and blood transfusions. Occasionally patiets will develop severe or recurrent rectal bleeding. In case of massive bleeding requiring excessive transfusion, colonic diversion by construction of a colostomy or excision of the diseased segment may be inevitable. However, surgical procedures in these patients are associated with a high mortality and morbidity. Moreover, medical therapy is usually ineffective. Recently formalin therapy has been introduced as a simple and effective treatment for hemorrhagic radiation proctitis. We experienced a 69 year-old woman patient who developed severe homorrhagic proctitis 1 year after radiotherapy for carcinoma of the cervix. She had not improved by conservative management and required blood tranafusions and repetitive hospitalizations. After local application of a 4% formalin solution in the diseased rectum under caudal anesthesia, the bleeding immediately stopped and the patient was discharged from the hospital, and no recurrence has been observed until now.