산화방지제 및 대전방지제의 첨가에 다른 유동대전특성에 관한연구

최창락(C. R. Choi),박재윤(J. Y. Park),박상현(S. H. Park),나동근(D. K. Na),김영일(Y. I. Kim),이덕출(D. C. Lee) 대한전기학회 1995 대한전기학회 학술대회 논문집 Vol.1995 No.7

HDP-CVD를 이용한 OLED용 수분침투 방지막에 대한 연구

김창조(T.J. Gim),신백균(P.K. Shin),최윤(Y. Choi),이붕주(B.J. Lee),김병수(B.S. Kim),이병수(B.S. Lee),최창락(C.R. Choi) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

현재 상용화된 OLED 소자는 최대 단접인 수분 취약성의 원인으로 top emission과 flexible 타입으로 제조되는데 장애가 되고 있다. 따라서 top emission 방식과 flexible한 소자를 실현하기 위해 수분 및 산소 침투를 망지하기 위한 유전체 막의 실험이 진행되고 있는데, 본 실험에서는 기존의 PECVD보다 plasma의 density가 높은 HDP(High Density Plasma)-CVD를 사용해 SiOx 및 SiNx 유전체 film을 증착하였고 MOCON 테스트를 통한 수분침투 방지막으로써의 가능성을 검증하였다.

터키안배 및 주변 병소에 대한 측두와 수술 방법

최창락,이춘장,송진언 대한신경외과학회 1977 Journal of Korean neurosurgical society Vol.6 No.1

Transtemporal approach to sellar and parasellar inagnrated first by Horsley (1902). Thereafter this procedure has been cultivated by many neurosurgeons when the mass of sellar and parasellar are to extension of suprasellar, temporal or backward direction. Recently we experienced 21 temporal approach for sellar and parasellar tumors. By this procedure a clear expose of intrasellar and suprasellar portion of the tumor is guaranteed as well as their relationship to parent structures, especially the chiasm and optic nerve, vessels, hypothalamus, infundibulum, and other cranial vessels. Favorable illumination, sterescopic view, adequate magnification and depth of focal of the surgical microscope along with the microsurgical instruments provide the armamentarium in treatment of sellar and parasellar lesions.

뇌출혈의 뇌정위적 제거술

최창락,안명수,이상철,박춘근 대한신경외과학회 1982 Journal of Korean neurosurgical society Vol.11 No.1

1980년 3월부터 6월까지 본원에서는 5예의 고혈압성 뇌출혈 환자에서 래원 즉시 촬영한 두개내 computerized axial tomogram을 이용하여 뇌출혈량과 부위를 계측한 다음 Trasyrol®100 Unit를 2~3일간, 50만 Unit를 5일간 정주하고 steroids, mannitol 또는 glycerol을 정주한 후 Tod-Well stereotaxic apparatus를 이용하여 국소 마취하에 뇌혈종을 제거하고 혈종 부위에 drain를 막아 계속적 배출을 시도하여 2~3주 후 CT scan을 시행하여 혈종이 제거된 것을 확인하면서 치료하였다. 이상과 같은 결과는 뇌정위적 방법으로 국소 마취하에 전신상태가 전신 마취에 견디기 어려운 예나 경제적으로 저렴한 비용으로 실시할 수 있어 좋은 방법으로 사려되어 보고하는 바이다. In 5 cases of intracerebral hematoma due to hypertensive hemorrhage or postcontused hemorrhage, stereotaxic evacuation of the hematoma in the brain was performed. CT scan was done for definite diagnosis, localization and coordinating target. In order to make possible the evacuation of coagulated hematomas through a simple burr hole, a specially designed instrument (Tod-Well stereotaxic guide) and infusion of proteolytic enzyme (Trasyrol^(R)) were used. While we have treated these patients with antiedematous agent, it was possible to wait for 4-5 days to attempt in expectation of clot hematoma. Timing is of paramount important for success with this technique. Therefore CT scan must be done for the detection of characteristic of the blood clot state. This method is simple and it can be done under the local anesthesia. This stereotaxic evacuation method does not decrease high mortality rate of intracerebral hematoma, but morbidity of the patient was improved and this method offers a less bloody operation for patients with slightly neurological deficits presenting lesions in deep brain structures.

척수 손상 환자에서 지각유발전위의 임상적 가치

최창락,이길송,박기용 대한신경외과학회 1982 Journal of Korean neurosurgical society Vol.11 No.2

수술과 척수 조형술로서 척수 손상이 확인된 16예의 환자에서 지각유발 전위검사를 시행하였다. median nerve 또는 deep peroneal nerve 자극시 4개의 파동이 나타났고 척수 손상시 주로 진폭, 잠복기와 파형이 손상의 정도에 따라 비례적으로 이상 소견으로 나타나서 손상이 심한 예들에서는 지각유발 전위를 얻을 수 없었다. 처음 검사시 지각유발 전위의 진폭의 감소, 잠복기의 지연등 주된 이상 변화가 증세 호전으로 정상으로 회복되는 것을 알 수 있었다. 이와같은 결과로 지각유발 전위 검사는 척수손상의 기능 검사중 유익한 검사라고 생각된다. Using somatosensory evoked potential response (SEP) we try to evaluate spinal cord injuries in patients. Recording of the SEP in patients with spinal cord injury is carried out at bed side in the hospital room with a mobile cart containing the EEG amplifiers, averaging computer, oscilloscope and camera. For recording the SEP with deep peroneal or median nerve stimulation, records are made using electrode position C4 and C3 of international 10-20 system. In our work we have average 256 responses with the peripheral nerve being stimulated at a frequency of one per second. Stimulation is carried out with square wave pulses of 0.1 msec in duration. The recording characteristics of the Sanei 7SO7 amplifier are used our preliminary data from the study of 16 patients with spinal cord injuries show that the evoked potential study is an extremely sensitive indicator of spinal cord damage. It may prove particularly useful in the early identification of incomplete spinal lesions and it shows promise in developing into a useful method.

Extra-Intracranial Arterial By-pass Graft의 1예 보고

최창락,윤석훈,송진언 대한신경외과학회 1977 Journal of Korean neurosurgical society Vol.6 No.1

A 9 years old girl had sudden bursting headache and weakness of left extremities for 2 days. Finally he could not walk due to hemiplegia. Neurological examination revealed flaccid hemiplegia, left. Angiogram performed by conventional selective injection into the common carotid artery. Angiographic findings may be demonstrated thrombosis of cortical branch of middle cerebral artery. EIAB(Extra cranial and Intracranial Arterial By-pass) was performed between STA and MCA by microsurgical techniques. Postoperative angiographic control performed by selective injections into the right external carotid artery. It should be emphasized that for thrombosis of middle cerebral artery in children, the early diagnosis and STA-MCA anastomosis are essential to save the patients.

측뇌실과 제3뇌실 종양에 대한 임상적 관찰

최창락,송진언 대한신경외과학회 1972 Journal of Korean neurosurgical society Vol.1 No.1

The locations of 9 ventricular tumors were outlined by radiological studies and their natures were determined by pathological studies following surgical intervention except for two caseses. Clinical manifestations, rediological findings and incidence of the various tumors with regards to their locations in relation to the ventricles, were analyzed. Following are the results: 1. Of the 9 cases, 4 were lateral ventricular tumors, and the rest were third ventricular tumors. Of the lateral ventricular tumors, 2 were meningiomas while the other 2 were ependymonas. Observations revealed that either meningioma or ependymona were found in both the right and left ventricles. 2. The 5 cases of third ventricular tumors were diagnosed after neuro-radiological studies. Surgical interventions were peformed on three. The type of tumors were determined by pathological studies of the surgical specimen which revealed, one colloid cyst, another meningioma and the other teratoma. 3. The predominating neurological manifestations were headache and papilledema. The lateralizing sign occurred more frequently in those with the lateral ventricular tumors. Paroxysmal headache were experienced in the cases with colloid cyst, meningioma of the third ventricle, and choroid plexus papilloma of the lateral ventricle. 4. The most prominent radiological finding was ventricular dilatation. The dilatation of the anterior choroidal artery was observed in one case of meningioma of the lateral ventricle. Secondary changes of the sella turcica due to increased intracranial pressure were seen in cases of lateral ventricular tumors and in 3 cases with the third ventricular tumor. In the colloid cyst there was an elevation on the anterior portion of the internal cerebral vein while the rest of the veins were flattened and displaced downward on the lateral view. 5. The cerebrospinal fluid protein content was significantly increased in 5 cases and electroencephalogram revealed either a focal or a generalized abnormal activity in the 6 cases. 6. In these studies we found out that Conray ventriculogram has the distinct benifit in accurately outlining tumors in the ventricles as compared to pneumoventriculogram.

두부외상환자의 홀몬 변화

최창락,박주형,이춘장,이상원 대한신경외과학회 1980 Journal of Korean neurosurgical society Vol.9 No.1

In 25 head injury patients, the following hormone GH, prolactin, LH, FSH, TSH, T₃, T₄ and cortisol were measured by radioimmunological methods in plasma. This study has revealed that coma patients following severe head injury are no functional impairment of the hypothalamus-hypophyseal system including LH, FSH, TSH while GH prolactin, T₃and T₄ are decreased. According the recovery of neurologic conditions, above mentioned decreased hormonal levels are progressively increase as the normal level. It is suggested that traumatic coma patient should be investigated for about the change of the neuroendoclinologic conditions.

시상부와 시상하부의 고주파 자극 및 응고시 시상부와 시상하부 조절계통의 뇌파상 변동에 관한 실험적 연구

최창락,강세기,송진언 대한신경외과학회 1978 Journal of Korean neurosurgical society Vol.7 No.2

Charateristic E. E. G. patterns in thalmus and hypothalamus were found during stereotaxic animal experiments. Intralaminal nuclei, dorsomedial nucleus and pulvinar in thalamus, and anterior and posterior nuclei in hypothalamus were either stimulated or coagulated with using radiofrequency generator (RF) in this study. The major rhythmic activity of thalamus and hypothalamus the delta to theta frequency was changed following RF stimulation or coagulation of above mentioned areas. According to the increases of stimulation voltage the rhythmic pattern of thalamus and hypothalamus, altered from synchronization to desynchronization activity. The rhythmic activity, however, showed suppression on coagulation of thalamus and hypothalamus. The modulation of cortical E. E. G. was concerned among thalamus, hypothalamus and brain stem. However it was controlled mainly by the brain stem. The alteration of electrical activity of thalamus and hypothalamus was clearly demonstrated on our study during stereotaxic surgery in human being.

흉요추부 병소에 대한 신경외과적 수술시 개량된 Tuck's 체위

최창락 최신의학사 1977 最新醫學 Vol.20 No.8

The authors has reviewed the 300 patients undergoing neurosurgical operation in Tuck's position for thoracic or lumbar lesions. The superiority of this position appears to take simple position, to reduce blood loss, to maintain good ventilation, to reduce spinal epidural venous engorgement, to have good exposure of interlaminar space and to decrease risk of injury to major prevertebral vessels and organ.