Trigemino-cardiac reflex: occurrence of asystole during trans-sphenoidal adenomectomy -a case report-

전대근,허태원,강봉진 대한마취통증의학회 2014 Korean Journal of Anesthesiology Vol.67 No.3

The trigemino-cardiac reflex has been reported to occur during various craniofacial surgeries or procedures including manipulation of the trigeminal ganglion, tumor resection in the cerebellopontine angle, various facial reconstructions and trans-sphenoidal adenomectomy. Regarding risk factors during trans-sphenoidal adenomectomy, invasiveness closely related to the size of tumor and the degree of manipulation of cavernous sinus wall have been reported. We report the case of a 40-year-old female patient who had a relatively small-sized (< 10 mm) pituitary adenoma. Repetitive asystoles occurred during microscopic trans-sphenoidal operation of the wall of the cavernous sinus, which strongly suggests the importance of careful manipulation of the cavernous sinus wall. In addition to reporting this rare complication of trans-sphenoidal adenomectomy, we reviewed its clinical management by performing a literature search.

에너지 기법을 이용한 초음속 고등훈련기급 항공기의 비행경로 최적화

전대근,이일우,오태식 한국항공우주학회 1997 한국항공우주학회 학술발표회 논문집 Vol.- No.-

골육종의 예후인자

전대근,이종석,김석준,양현석,이수용,Jeon, Dae-Geun,Lee, Jong-Seok,Kim, Sug-Jun,Yang, Hyun-Seok,Lee, Soo-Yong 대한근골격종양학회 1997 대한골관절종양학회지 Vol.3 No.1

Osteosarcoma is the most common primary bony malignancy and its survivorship has been progressed markedly through refined chemotherapy and surgery. But still there are many non-responders and analysis of prognostic factors may be helpful for them. Two hundred and sixty-six patients were enlisted between Mar, 1985 and Sep. 1994. Among them our inclusion criteria were: 1)primary, nonmetastatic classical osteosarcoma 2)extremity in location 3)no prior treatment at other institute and completed neoadjuvant chemotherapy and surgery according to our protocol. One hundred and eleven cases were eligible. Analyzed factors were:age, sex, location, tumor size, and pathologic response. Statistical methods were log-rank test for univariate and Cox's test for multivariate analysis. Male to female ratio was 69:42 with an average age of 17.2 years. Locations of tumor were distal femur 59, proximal tibia 29, and proximal humerus 8. Tumor size were measured by its maximal diameter and 48 cases were above 10cm and 47 cases were below 10cm. For pathologic response, 57 cases showed more than 90% and 54 cases were less than that. Limb salvage procedure was 101 cases and amputation was 10 cases and their local recurrence rate were 3.6%. Average follow-up period was 24(9-78.2) months and their final status was CDF 86, AWD 8, NED 5, and DOD 12 cases. In univariate study: type of operation(p=0.005), tumor size(p=0.005), and pathologic response(p=0.02) were significant variables. Pathologic response(p=0.03) and type of operation(p=0.01) were meaningful prognostic factors on multivariate analysis. But the latter result was interpreted as a bias, so pathologic response remained as a sole meaningful prognostic factor. More aggressive chemotherapy will be needed to improve the survival.

도착관리시스템 주기능 처리 소프트웨어 설계

전대근,은연주,오은미,김현경 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11

도착관리시스템은 항공기의 안전하고 효율적인 도착을 위한 관제지원도구로서 도착 항공기의 순서화 및 접근관제구역으로의 미터링 기능을 가진다. 본 연구에서는 제주공항으로 도착하는 항공기를 대상으로한 도착관리 시스템의 운용개념 및 요구사항을 정의하였으며, 이를 토대로 도착관리 주기능 처리 소프트웨어 설계를 수행하였다. 설계를 통해, 외부 자료 디코딩 및 인코딩, 비행계획 및 항적 연관, 4 차원 정밀 궤적 생성, 조언 정보 생성 등 총 4 개 소프트웨어 구성요소를 식별하였으며, 구성요소 별처리 절차 및 인터페이스를 정의하였다. 본 연구 결과는 향후 소프트웨어 구현 과정에 활용될 예정이다. AMAN(Arrival Manager) is a decision supporting tool for safe and efficient arrivals through sequencing and metering arrival streams of traffic. In this study, operational concepts and requirements of AMAN for arrivals to Jeju airport are defined. Based on them, the main processing software for AMAN is designed. Through the design, four software components are identified, which include decoder and encoder of inputs and outputs, correlator of flight plans with system tracks, 4-dimensional trajectory predictor, and advisory generator. In addition, processes and interfaces for each component are also defined. The results of this study will be used for the implementation of software.

다발성 연골육종 1례 보고

전대근,이종석,김석준,이수용,Jeon, Dae-Geun,Lee, Jong-Seok,Kim, Sug-Jun,Lee, Soo-Yong 대한근골격종양학회 1997 대한골관절종양학회지 Vol.3 No.2

Multicentric chondrosarcoma other than the mesenchymal subtype is rare separate entity. We experienced a case with nonmonomelic synchronous multicentric chondrosarcoma without any preexisting lesions of Oilier's disease or Maffucci's syndrome. To our knowledge, there was no report of synchronous nonmonomelic multicentric chondrosarcoma. A thirty-three year old man had right distal thigh pain of one and half year. Bone scan showed hot lesions on medial condyle of right femur and shaft of left femur. Plain X-ray showed osteolytic lesion on right femur and slight cortical thickening and calcific lesion was observed on left femoral shaft. Curettage and bone cement filling was done on both lesions. The pathology reports were grade I chondrosarcoma on both side of femur. At one month from operation, pathologic fracture of left femur occurred on bone cement-host bone junction. Conservative treatment and radiotherapy of 60Gy was done. At 8 months from operation, nonunion was evident. Segmental resection of left femur with contralateral fibula graft and second look operation on right condyle lesion were done. At 6 months from revision, fracture occurred at host-graft bone junction. We removed previous hardware and applied long DCP and massive autogenous bone graft. Afterwards, the patient looks good and union was progressing. But at 4 years from last operation, hypertrophic nonunion occurred. Another revision was done with condylar plate and bone graft and now he is well without any sign of local recurrence or metastasis.

유잉 육종의 치료에서 수술의 역할

전대근,이종석,김석준,박현수,장진대,이수용,Jeon, Dae-Genn,Lee, Jong-Seok,Kim, Sug-Jun,Park, Hyun-Soo,Jang, Jin-Dae,Lee, Soo-Yong 대한근골격종양학회 1996 대한골관절종양학회지 Vol.2 No.1

The traditional methodology in Ewing's sarcoma was chemotherapy and radiotherapy. Recently surgery is reemerging as an important therapeutic tool and some paper report increased survival with it. The purpose of this nonrandomized study is to evaluate our result of Ewing's sarcoma with surgery, retrospectively. We experienced 30 cases for seven years and among them 6 were extraskeletal. In location, axial was 10 cases and peripheral was 20. By Enneking's classification, state IIB was 26 cases and IIIB was 4. Eighteen patients took operation, chemotherapy and/or radiotherapy, and remaining twelve took chemotherapy and/or radiotherapy only. Type of operation was limb salvage in 16 cases and amputation 2. Average dosage of radiation was 45.1Gy. Six kinds of chemotherapeutic regimen were used, but among them main protocols were Ifosfamide-Adriamycin(17 cases) and IESS(Cytoxan, Adriamycin, Methotrexate, Vincristine:8 cases). Complications were as follows. In operation group, there were 3 local recurrence and one case of nonunion. In nonoperated group, one local recurrence and one pancytopenia resulting in death. Average follow up was 29.7 months. Kaplan-Meier's ten year actuarial survival rate for the whole 30 cases was 26.8%. Significant difference in survival exists between central and peripheral lesions(p=0.05, by log rank test). Types of chemotherapy and surgery itself showed no significance. But surgery is important in function and local control. More intensive chemotherapeutic regimen to prevent distant metastasis and combined surgery and radiotherapy may be needed in Ewing's sarcoma.

Hemiarthroplasty for Osteosarcoma of Proximal Tibia

전대근,조완형,김진욱,고한상,Jeon, Dae-Geun,Cho, Wan-Hyeong,Kim, Jin-Wook-,Koh, Han-Sang The Korean Musculoskeletal Tumor Society 2006 대한골관절종양학회지 Vol.12 No.1

목적: 근위 경골 육종의 절제 후 재건은, 특히 골성장이 완료되지 않은 환자의 경우 많은 문제점이 있다. 본 연구에서는 근위 경골 육종의 절제 후 재건에 따르는 문제점을 보완하기 위한 새로운 술식을 시도해 보고자 하였다. 대상 및 방법: 근위 경골에 발생한 골육종의 절제 후 반관절성형술을 시행한 4례를 대상으로 하였다. 평균 연령은 13세였으며 술후 평균 추시 기간은 64개월이었다. 전례에서 초고분자량 폴리에틸렌 삽입물(ultra-high molecular weight polyethylene liner)을 이용하여 관절면을 재건한 후 엔더정(Ender-nail)과 골시멘트를 이용하여 남아있는 경골에 고정하였다. 결과: 최종 추시상 MSTS 기준에 의한 기능적 점수는 23.5점(78.3%)이었다. 전례에서 술후 슬관절 동통, 불안정성은 관찰되지 않았다. 결론: 골성장이 완료되지 않은 소아 환자의 근위 경골 육종 절제 후 재건 방법으로서 반관절 성형술은 효과적인 술기로 판단된다. Purpose: The proximal tibial sarcoma patients, especially in their growing ages have problems of reconstruction. This study is to devise a methodology which can circumvent this limitations. Materials and Methods: Four cases of proximal tibial osteosarcoma underwent hemiarthroplasty. The mean age was 13 years (11~15) with a mean follow-up of 64 months (47~89). The procedure consists of ultrahigh molecular weight polyethylene (UHMWPE) liner as an substitute for the joint surface and this piece was fixed to the remaining tibial bone stock with Ender nail and bone cement. Results: Final functional score was 23.5 (78.3% of control) by MSTS criteria. All the cases showed stable joint without pain. Hemiarthroplasty related complications were absent. By saving the femoral physis, expected leg length discrepancy could be minimized by this procedure. Conclusions: Hemiarthroplasty of proximal tibia can be an option in pediatric sarcoma patients.

원위 요골에 발생한 거대 세포종의 일괄 절제 후 초고분자량 폴리에틸렌 삽입물을 이용한 재건술 - 증례보고 -

전대근,송원석,오정문,Jeon, Dae-Geun,Song, Won-Seok,Oh, Jung-Moon 대한근골격종양학회 2004 대한골관절종양학회지 Vol.10 No.1

원위 요골의 거대 세포종은 빈도가 많지는 않다. 통상적으로 골 소파술 및 골 시멘트 충전술로 치료하지만, 재발한 경우나 처음부터 골피질 파괴가 심하고 관절 침범이 있을 경우에는 일괄 절제(en bloc resection) 후 근위 비골을 이용하여 재건하는 술 식이 많이 이용되어 왔다. 본 연구는 고식적 술 식으로 치료한 후 국소 재발한 원위 요골의 거대 세포종 환자에서, 근위 비골을 이용한 재건술을 시행하여도 일차 술 식 시 오염의 범위가 심하여 다시 재발할 가능성이 높아 초고분자량 폴리에틸렌(ultrahigh molecular weight polyethylene, UHMWPE)과 골수강내 고정물 및 골 시멘트를 조합하여 원위 요골을 재건한 1례를 보고 하고자 한다. A giant cell tumor (GCT) of the distal radius is not common. Curettage with bone cementation is considered as a treatment of choice but, in the case of recurrence, marked cortical disruption, or articular invasion, en bloc excision and reconstruction with proximal fibular bone graft is usual procedure. In reconstruction of en bloc resected distal radius which had recurred GCT after conservative operation, we used the ultrahigh molecular weight polyethylene (UHMWPE) liner with intramedullary rod and bone cement, because the contamination was extent in previous operation and recurrence after fibular bone graft was fearful. This article introduce our new surgical procedure.

FAA AC120-63 Level C급 KA-32T 비행 시뮬레이션 모델 개발

전대근,최형식,전향식 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-

증착 온도에 따른 IZO 박막의 구조적 및 전기적 특성

전대근,이유림,이규만 한국반도체디스플레이기술학회 2011 반도체디스플레이기술학회지 Vol.10 No.3

In this study, we have investigated the effect of the substrate temperature on the structural and the electrical characteristics of IZO thin films for the OLED (organic light emitting diodes) devices. For this purpose, IZO thin films were deposited by RF magnetron sputtering under various substrate temperature. The substrate temperature has been changed from room temperature to 400℃. Samples which were deposited under 250 ℃ show amorphous structure. The electrical resistivity of crystalline-IZO (c-IZO) film was higher than that of amorphous-IZO (a-IZO) film. And the electrical resistivity showed minimum value near 150℃ of deposition temperature. The OLED device was fabricated with different IZO substrates made by configuration of IZO/α-NPD/DPVB/Alq3/LiF/Al to elucidate the performance of IZO substrate. OLED devices with the amorphous-IZO (a-IZO) anode film show better current density-voltage-luminance characteristics than that of OLED devices with the commercial crystalline-ITO (c-ITO) anode film. It can be explained that very flat surface roughness and high work function of a-IZO anode film lead to more efficient hole injection by reduction of interface barrier height between anode and organic layers. This suggests that a-IZO film is a promising anode materials substituting conventional c-ITO anode in OLED devices.