비확공성 골수강내 금속정을 이용한 폐쇄성 경골 간부 골절의 치료

정필현,황정수,채동주,문상호 東國大學校 1998 東國論叢 Vol.37 No.-

Most of closed fractures of the tibial shaft can be treated successfully with medullary nails. Reamed intramedullary nailing technique has become a good alternative method in treating the close tibial fracture. Unreamed interlocking intramedullary nailing has been employed successfully in the treatment of open tibial fractures. This study was undertaken to evaluate the result of interlocking intramedullary nailing without reaming in the treatment of closed fractures of the tibial shaft. From 1995 through 1998, fifty four cases of the closed, displace tibial fractures were treated by an unreamed intramedullary nailing and the average follow-up period was 1 year and 5 months(ranged from 12 months to 27 months). The results were as follows : 1. Fifty four cases were treated with closed, unreamed nailing technique and the nail which has 1mm smaller diameter than isthmic width of unaffected tibia was choosen. 2. The average time to bony union was achieved at 17 weeks without abundant periosteal b callus formation. 3. Eight tibiae were required the additional procedure such as autogenous bone graft, skin graft or local skin flap. We also have observed the screw breakage of ten tibiae but there were no intraoperative jamming or incarceration and no significant complicaton such as bending or breakage of the nail, shortening or non-union of the fractures. In conclusion, unreamed technique is an attractive method to treat the close, displaced fractures of the tibial shaft. 경골 간부 골절의 치료에 있어서 견고한 내 고정으로 조기 관절운동 및 체중 부하를 통해 골절 유합 및 기능 회복을 도모할 수 있는 골수강내 금속정 고정술이 널리 사용되어지고 있다. 골수강내 금속정술의 장점은 술 후 조기 관절운동과 체중 부하가 가능하여 이환율(morbidity)을 감소시키며 불유합의 발생률이 낮아는 것이다. 경골 간부 골절의 치료에 있어서 비확공성 금속정 고정술은 주로 심한 연부 조직 손상을 동반한 골절 및 개방성 골절의 치료에 적용되어지고 있으며, 대부분의 폐쇄성 경골 간부 골절의 치료로는 골수강 확공 후 골수강을 충만시키는 금속정을 삽입하는 확공정 금속정 고정술이 시행되어지고 있는 경향이다. 저자들은 폐쇄성 경골 간부 골절에 대해서 비확공성 금속정 고정술의 유용성 여부를 알아보기 위해서 동국대학교 의과대학 정형외과학교실에서 치료했던 54례를 평균 1년 5개월 추시하여 골 유합 기간, 합병증의 발생에 대해서 분석하였다. 본 연구에서 비확공성 금속정 고정술시 골 유합 기간은 확공성 금속정 고정술시와 비교하여 유의한 차이가 없음을 알 수 있었으며, 확공을 하지 않음으로써 발생할 수 있는 jamming이나 가는 직경의 금속정을 선택함으로써 우려되는 금속정의 휨, 부러짐 등의 합병증은 발생하지 않았다. 결론적으로 폐쇄성 경골 간부 골절의 치료에 있어서도 비확공성 골수강내 금속정 고정술은 유용한 방법으로 사료된다.

HPLC 시스템을 이용한 大氣中 多核芳香族 炭化水素의 定量에 關한 硏究

정재필,황승만,박철용,백성옥 嶺南大學校 工業技術硏究所 1991 연구보고 Vol.19 No.1

In this study, an analytical procedure was evaluated for the determination of atmospheric PAH, both in gaseous and particulate phases. The method involves Soxhlet extraction of the filters and Tenax adsorbent, followed by a clean-up stage using a silica mini column prior to analysis by reversephase HPLC with wavelength programmable fluorescence and UV detection. A total of 18 PAH were identified and quantified, all of which have been of environmental concern. In order to validate the methodology and to ensure compatibility of the results, the analytical method used for the determination of PAH was evaluatd with respect to the efficiencies of extraction and clean-up procedure, HPLC separation, and lower limits of detection. In addition, substrate dependency of PAH recovery was also investigated for the two type of filter(glass fiber and PTEF filters) and Tenax adsorbent.

척추 유합술에서 자가 이식골과 동종 이식골의 비교 : 증례보고 A Case Report

정필현,김태훈,채동주,문상호,박윤근,배호균,이재학 東國大學校 1999 東國論叢 Vol.38 No.-

척추 유합술에 있어서 자가 골 이식이 가장 좋은 방법으로 알려져 있지만 수술 시간과 실혈량이 늘어나고 공여부의 통증 및 감염의 위험등 단점으로 동종 골 이식도 많이 사용되어지고 있다. 이러한 동종 이식골의 효용성에 대해서 많은 논란이 있어온 것은 사실이나 여러 변수들, 즉 나이, 성별, 흡연력, 수술의 종류등에 따른 영향을 완전히 배제시키지 못하여 순전히 동종 이식골과 자가 이식골간의 비교가 어려웠다. 저자들은 척추관 협착증으로 후방 감압술 및 후방 기기 고정술, 후외방 골 이식술을 받은 환자에게서 우측은 자가 이식골, 좌측은 동종이식골로 골 이식을 시행한 후 4년 추시에서 자가 골 이식한 부위는 견고한 골유합 소견을 보였으나 동종골 이식 부위는 이식 골이 모두 흡수되는 소견을 체험하여 같은 조건하에서 자가 이식골이 동종 이식골보다 골유합체의 형성에 있어서 더 우수하다고 생각한다. Posterior decompression, spinal instrumentation and bone grafting are the standard operative treatment method of spinal stenosis and other low back disorders. Although autograft bone is considered the standard in performing fusion of the bone, allografts are recommended as an alternative bone graft agent becaue of the lack of complications at the donor site such as infection, increased blood loss and prolonged operative time Autografts have the other limitations because of inadequate quality and quantity. Many investigators have compared autografts and allografts in posterior spinal fusion, and there are proponents as well as opponents of allograft use. Numerous factors are thought to affect fusion, including age, sex, nutritional status, associated disease, type of fusion, length of fusion, types of instrumentation and smoking status. The validity of comparison studies between allografts and autografts is questionable when these variables are not controlled. We describe a man who had a spinal stenosis at the level of L4-5 and L5-S1. He was operated with posterior decompression, spinal instrumentation and underwent a posterolateral bone graft, comparing autografts and allografts in the same patient. At 4-year follow up, autografts have a solid union but allografts are resorbed completely.

상악 결손부 수복을 위한 측두피판의 이용

정창주,진국범,이동근,윤성필,김귀희,김영조 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.1

The functional deformity following removal of the maxilla is considerable, especially following maxilla cancer excision. Rehabilitation of oral and maxillofacial region used to be very difficult with prosthesis or traditional flaps. Temporal muscle and fascia flaps have been described for immediate reconstruction following hemi-maxillectomy, but not total maxillectomy. The muscle and superficial fascia of the temporal area differ in their physical characteristics, vascular supply and clinical applications. Both can be employed independently or simultaneously as regional flaps in the reconstruction of a variety of complex craniofacial defects. Four case is presented in which 3 case maxilla cancer, one case non-union after maxilla fracture, and all case showed successful use of this flap. Only one patient developed partial necrosis of the flap ; significant necrosis did not occur in any other patient. This present paper reviews the anatomy, surgical technique and utilisation of temporal muscle and fascia flaps.

요통의 정신의학적 관점

정철호,박필상 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.2

전력계통의 부하주파수제어를 위한 신경망 PID제어기 설계

정형환,김상효,이정필,주석민 東亞大學校 大學院 1998 大學院論文集 Vol.23 No.-

This paper has presented a method for self-tuning the PID controller suing a BP method of multilayered NNs. The proposed controller employ input signal as a learning signal of PID control. The proposed controller is applied to load-frequency control of power system and it is investigated a dynamic characteristic. The simulation results shows that proposed NN STPID controller has the good dynamics responses against load disturbances.

19세 환자의 골성 변화를 동반한 선천성 사경의 치료 : 증례보고

정필현,배성한,문상호 東國大學校 1998 東國論叢 Vol.37 No.-

Congenital muscular torticollis has been recognized for centuries and has been the subject of many reports. Controversy remains regarding the indications for conservative or operative treatment, the regarding the indications for conservative or operative treatment, the surgical procedure of choice and the ultimate results. The optimal time for surgery is between 1 and 4 years and most children treated before the age of 1 year respond well to conservative treatment. However, there has been very limited experience in terms of what kind of results one can expect in the management of the older child. The authors reviewed a case of neglected 19-year-old congenital muscular torticollis who has fibrotic band, bony deformity on clavicle, facial asymmetry and cervical scoliosis due to contracture of sternocleidomastoid muscle. Although articles showed that the best results can be expected in children<4 years of age, we believe that surgery should be offered to those of older age as well. Although facial asymmetry is unlikely to improve, these patients benefit from tilt and have increased range of neck movement by surgery, physiotherapy, short-term Halter traction and cervical collar.

엔진 냉각계의 방열량 해석에 관한 연구(Ⅰ)

원종필,방청세,마상용,박경석 慶熙大學校 1997 論文集 Vol.26 No.-

The higher output levels attained by automotive engines recently been accompanied by an increase in the amount of heat released by the engine. This higher heat release level has caused the thermal load in the engine compartment to rise. As a result, greater emphasis has been placed on thermal analysis of heat radiation from the radiator and of heat release from the engine. Heat release the coolant from the engine is released with heat transfer. It is. thus, the essential element to analysis of heat transfer process in cooling system for an automotive engine. However, most of the research about heat release to the coolant is performed from the standpoint combustion, so this research is done from the standpoint of heat transfer to the cooling system including the engine coolant. This study is performed on the analysis of heat release chracteristics in cooling system for an automotive engine according to the operating and cooling conditions. The results are summarized as follows: 1. The heat release is increased according as coolant temperature is decreased and coolant flowrate is increased. 2. The heat release is increased and heat release per power is decreased according as engine is increased with same engine speed. 3. The heat release is increased by increasing fuel comsumption according as engine speed increased.

급성충소돌기염의 임상 : 병리학적 고찰

양기화,조준필,하영천,한진우,정학재,손수창,이성희,황재훈,신철호 최신의학사 1989 最新醫學 Vol.32 No.4

Mapping quantitative trait loci for agronomic traits using introgression lines carrying wild rice (Oryza rufipogon) chromosome segments in cultivar background

Sang-Min Yeo,Yeo-Tae Yun,Chong-Tae Chung,Jung-Phil Seo,Hae-Hwang Kim,Sang-Nag Ahn 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07

The objective of this study were to identify QTLs for agronomic traits using a set of introgression lines carrying wild rice (Oryza rufipogon) segment in cultivated rice (ssp. japonica cv. Hwaseongbyeo). Ninety-six ILs were evaluated for seven agronomic traits, amylose and protein contents. The proportion of the recurrent genome in ILs ranged from 87.8 to 100%, with an average of 96.7%. The mean number of homozygous and heterozygous donor segments were 2 (ranging 0-7) and 1.7 (ranging 0-6), respectively, and the majority of these segments had size less than 10 cM. A total of 22 quantitative trait loci were identified for 9 traits and each QTL explained 7.2% to 56.6% of the phenotypic variance. Some QTLs were clustered in a few chromosomal regions. A first cluster was located near RM527 on chromosome 6 with QTLs for culm length, panicle length, days to heading, 1000-grain weight and protein content. Three ILs with high spikelets per panicle compared to the recurrent parent were selected to detect and fine map the wild segments responsible for this variation. The results will be discussed.