고도전위 척추전방전위증의 해부학적 정복시 문제점

하기용 대한척추외과학회 2001 대한척추외과학회지 Vol.8 No.3

There has discussion about surgical for treaement of high-grade isthmic spondylolisthesis(grade ⅢorⅣ).Reduction is combined unnecessary by many authors because of the reliability of in situ fusion. However, some investigator have stated a need for reduction is not only restoration of normal spinal alignment and biomechanecs: A reduced position is belived to enhance fusion. relieve neurological abnormalioties and improve the cosmetic appearance. Many different techniques have been developed for reduction of spondylolisthesis after Jenkin's inital description in 1936. The techniques include halofemoral traction, cast reduction, instrumentation. L5corpectomy and thecombined anterior and posterior approach. Recently, newly developed pedicular instrumentation was widely used to reduce high-grade spondylolisthesis and had high fusion rates. But these instrumentations cannot prevent complications such as nerve root lesions due to the traction on the L5 root during reduction. Anyway there is much controversy about the most effective surgical decision making and preoperative planning need to assress not only the anatomic deformity but also the symptoms complex as manifested by the predominance of either back pain and/or radicular symptoms. However, the patients with high-grade isthmic spondylolisthesis are very limited in Korea. Therefore, the best reliable reduction method for high-grade spondylolisthesis remains a challenging procedure, requiring great surgical attention to detail.

연구보문 : 자연과학 ; 다수확 품종 쌀을 이용한 스폰지 케익의 제조 시 트랜스글루타미나제 첨가에 의한 물성 향상

하기용,유재수,강현중,김보경,이미자,강동오 韓國國際農業開發學會 2012 韓國國際農業開發學會誌 Vol.24 No.4

This study was carried out to select the rice variety that had excellent processing quality through physicochemical properties and to examine the textural properties of rice sponge cake prepared with different amounts of added transglutaminase(TG). The amylose contents of cultivars were in a range of 18.5~20.2% that did not show significantly differences among the rice cultivars. The water binding capacity of Boramchan was higher than those of the other rice flours, which makes it an appropriate rice flour for bread baking properties. Water binding capacity was positively correlated with the damaged starch content of each rice cultivar. Amylogram properties of cultivars were improved in rice flour with addition of transglutaminase with comparison to those of rice flour without transglutaminase. The volume of rice sponge cake increased as addition level of transglutaminase increased up to 0.6% and decreased thereafter. It was similar to it used with wheat flour when 0.2% transglutaminase was added. The hardness of the sponge cake added with transglutaminase increased more slowly than that of the sponge cake without transglutaminase, 0.2% addition of TG led to the best textural properties. On sensory evaluation, the appearance, taste, texture, overall acceptability of sponge cake made from Boramchan were much better than those of the other cultivars.

벼 저장온도 및 저장기간이 미질 관련 형질에 미치는 영향

하기용,박홍규,고재권,김정곤,최윤희 한국작물학회 2006 한국작물학회 학술발표대회 논문집 Vol.2006 No.-

70세 이상 노령환자에서 척추관 협착증의 수술적 치료

하기용,Wee, Dennis,장정호,김완호 대한척추외과학회 1997 대한척추외과학회지 Vol.4 No.1

Study Design : A retrospective analysis was performed on 19 patients, aged 70 years or over, who had decompressive surgery with or without fusion for degenerative lumbar stenosis. Objective : To analyze the result of spinal surgery in elderly patients with degenerative lumbar stenosis and to present possible complication following surgery. Summary of Background Data : In elderly patients who had degenerative lumbar stenosis, decompression is the most important factor in relieving symptoms and that the addition of spinal fusion would increase the postoperative morbidity. The long-term outcome of decompressive surgery in the elderly does not differ from that reported for younger patients. Methods : All patients were divided into 2 groups by surgical method. One group, consisting of 8 patients, underwent decompressive laminectomy and the other group, consisting of 11 patients, underwent decompressive laminectomy and fusion with instruments. The comparative analysis was performed between decompressive group and fusion group. Results : Overall, 72.5% of the patients had an excellent and a good results. There was no differences of overall clinical outcome between two surgical groups. As a complication, there was no significant complication in a decompressive group. In a fused group, however, significant complication developed. One patients died of unknown origin immediately after surgical intervention for failed back surgery syndrome. Radiographic nonunion and fracture adjacent to fused segments developed in one, respectively. Conclusions : Extra-careful preoperative evaluation must be done in order to recognize and minimize perioperative complications associated with major surgeries in more fragile patients especially who had failed back surgery syndrome. Wide decompressive laminectomy for spinal stenosis with segmental instability should be performed with fusion concomitantly to prevent postoperative instability regardless of patient's age.

bone cement를 이용한 요추 후방고정이 성장기 척추의 성장판 및 추간판에 미치는 영향

하기용 가톨릭대학 (가톨릭신학대학) 대학원 1982 가톨릭大學醫學部 論文集 Vol.35 No.1

벼 저장온도 및 저장기간이 미질 관련 형질에 미치는 영향

하기용,박홍규,고재권,김정곤,최윤희,김기영,김영두 韓國作物學會 2006 Korean journal of crop science Vol.51 No.1S

장기 저장시 취반특성에 영향을 주는 벼 품종간 저장온도 및 저장기간에 따른 색도 변화, 지방산 함량 및 식미치 등 쌀 품질저하에 관여하는 요인을 구명하고자 실험을 수행하였는바 그 결과는 다음과 같다. 1. 색도(b값)는 모든 품종에서 저장온도가 높을수록, 저장 기간이 경과할수록 증가하는 경향으로 상온저장이 저온(5~10℃,10~15℃) 저장보다 높았으며, 저온저장의 경우 6개 월 후부터, 상온저장의 경우 4개월 후부터 b값이 뚜렷이 증가하였다. 2. 공시품종중 조생종 품종인 삼천벼가 가장 높은 색도 증가를 보였으며 중생종 품종인 간척벼, 세계화벼가 중만생 품종인 동진벼와 호진벼보다 높은 증가를 나타내었다. 3. 토요 식미치는 품종간 차이가 있으나, 상온저장시 저온저장에 비하여 저장기간이 경과함에 따라 감소 폭이 커서 저온 저장보다 낮았는데, 저온저장시는 8개월 저장 후부터 약간 감소하였고, 상온저장시는 2개월 후부터 큰 폭으로 감소하였다. 4. 저장온도간 토요 식미치는 5~10℃ 에서 감소 폭이 가장 적었고 품종간에도 색도에서와 마찬가지로 조생종 품종일수록 감소폭이 컸다. 5. 현미 지방산도는 저장 2개월 후부터 증가하기 시작하여 저장기간이 경과할수록 큰 폭으로 증가하였고, 상온저장시 저온저장시보다 증가폭이 컸다. This study was carried out to investigate physiochemical properties and factors related with eating quality in the rice and paddy rice with different storage methods. As storage period was longer and temperature was higher, the b values of chromaticity and degree of fatty acid were increased, and the b value of room temp. was higher than that of low temp. In the varieties, the b value of Samcheonbyeo was the highest among varieties. also b value of Gancheokbyeo and Sae-gyehwabyeo were more increased than those of Dongjinbyeo and Hojinbyeo. Toyo meter values were significantly different according to storage temperature and period. Toyo meter values in storage of low temp. small decreased from 8 month after storages and that of loom temp. was severe decreased from 2 month after storages. In storage of low temp, Toyo meter values in storage of low temp. (5~10~circC) was the lowest, and those of the early varieties were the most decreased. Degree of fatty acid of brown rice was increased from 2 month after storages and those of low temp. was severe increased. So, they made rice quality and eating quality to be deteriorated

찹쌀 품종간 인절미 품질특성

하기용,김영두,이재길,신현탁,김석동 한국육종학회 2001 한국육종학회지 Vol.33 No.4

골다공증 척추 골절에서 전방 감압술 및 기기 이용 전방 유합술

하기용,류승준,윤형문 대한척추외과학회 2003 대한척추외과학회지 Vol.10 No.3

요추 척추경에 생긴 고립성 골 낭종

하기용,신재혁 대한척추외과학회 2001 대한척추외과학회지 Vol.8 No.1

연구 목적 : 요추 척추경에 발생한 고립성 골 낭종을 문헌 고찰과 함께 보고자 하고자 한다. 대상 및 방법 : 53세 여자가 5년간의 요통 및 갑작스럽게 발생한 심한 좌하지 방사통을 주소로 응급실로 내원하였다. T2강조 자기 공명영상에서 제 1요추 좌측 척추경에 위치한 고립성 골 낭종이 보였다. 결과 : 후방 도달법을 통하여 병변을 제거하였다. 척추경의 내측벽에 병적 골절 및, 신경근 압박 증상이 관찰 되었다. 조직 검사상 섬유막을 이루는 골 낭종 소견이 관찰되었다. 결론 : 척추경에 발생한 고립성 골 낭종 1례를 수술적으로 제거하여 성공적으로 치료하였다. Study Design : A case report and review of the literature. Objectives : To discuss a solitary bone cyst originating from the pedicle of the first lumbar vertebra. Summary of literature Review : The solitary bone cyst in the spinal colume is extremely rare. Since Dawson reported the first case in fourth cervical vertebral body. only 8 cases have been reported. The solitary bone cyst originating in the pedicle of the lumbar vertebra is the first reported case. Materials and Methods : A 53-year-old female patient visited the emergency room for severe radiating pain to the left lower extremity. T2 weighted MRI image showed a solitary bone cyst in the left pedicle of the first lumbar vertebra. Results : The medial wall of the pedicle showed cortical breakage causing nerve root compression. Pathology revealed fibrous membrane corresponding to a bone cyst. On postoperative 2 years of follow up, the patient was pain-free enjoying normal daily life. Conclusion : A case report of a solitary bone cyst in the left pedicle of the first lumbar vertebra accompanied with severe radiating pain resulting from a pathologic fracture and expansion of the medial pedicle wall.

골 대체물인 Calcium Sulfate를 이용한 척추 유합

하기용,박성진,최우성,노상현 대한척추외과학회 2001 대한척추외과학회지 Vol.8 No.1

연구 계획 : 골전도물질인 calcium sulfate(CS)을 이용하여 척추유합 후 자가 골이식만큼 효과가 있는지 확인하기 위한 전향적 연구이다. 연구 목적 : 골대체물인 CS을 이용한 척추 유합의 효과를 관찰하였다. 대상 및 방법 : 척추 기기 이용 척추 유합술시 CS를 혼합하여 골 유합술을 시행한 15례를 대상으로 하였다. 후외방 유합술을 시도한 전례에서 동일 분절의 한쪽 부위는 자가골 이식만 시행하였으며, 반대측 부위는 자가골 이식과 함께 CS을 가능한 1:1 비율로 혼합하여 이식하였다. 전례에서 방사선 촬영 및 CT 촬영을 주기적으로 시행하였다. 결 과 : CS와 자가골을 혼합하여 이식한 47분절 중 42분절(89.4%)에서 골 유합 소견을 보였으며, 자가골 이식만 시행한 47분절 중 44분절(93.6%)에서 골 유합 소견을 보였다. 1례에서 양측에서 불유합 소견을 보였으며, 2례에서 CS와 자가골 이식한 분절에서 불유합 소견을 보였으나, 자가골 이식한 분절에서는 골유합 소견을 보였다. 기기 제거시 육안적 관찰이 가능하였던 5례에서 완전한 골 유합 소견이 보였으며 CS와 관련된 합병증은 없었다. 결 론 : 기기 이용 척추 유합시 자가골 이식보다 낮은 골 유합률을 보였지만, 충분한 자가골을 얻을 수 없는 선택된 례에서 CS와 동시에 사용시 이식골 확장제로 사용할 수 있을 것으로 생각된다. Study design : This is a prospective study to determine whether calcium sulfate(CS) used as a bone graft expander could promote spinal fusion as effectively as autogenous bone graft. Objectives : To investigate the ability of CS to serve as bone graft substitute when combined in a 1:1 ratio with autogenous graft bone(AGB). Semmary and Literature Review : Autogenous bone is considered the most successful bone graft material and is presently gold standard. Many complications. however. have been reported. Thus. numerous biodegradable osteoconductive ceramic bone graft substitute have received attention as alternative to autogenous bone to reduce the complications. The advantage of a biodegradable graft material is its compatibility with the new bone remodeling process required to attain optimum mechanical strength. Materials and Methods : Fifteen patients who had undergone posterolateral spinal fusion with instrumentation using CS mixed with AGB were evaluated. The patients received the autogenous iliac crest graft on one side of the spine and an equivalent volume of autogenous iliac crest/CS combination on the other side. Thus. the patients serve as their own control. The number of segments fused was 45 segments. The implanted sites were assessed for new bone formation and bony fusion by plain radiography and CT. Results : Of 47 segments fused with CS and AGB, 42 segments (89.4%) were completely fused. In contrast, segments fused with AGB alone, 44 segments (93.6%) were fused. One patient showed nonunion at the both side. Two patients had nonunion at the fused segments with CS and ABG. However, the other side showed complete union. 5 patients who underwent removal of hardware had grossly and histologically complete union. There were no complications related to CS. Conclusion : Calcium sulfate appeared to have some potential as a bone graft expender rather than a graft substitute when combined 1:1 ratio with ABG. despite fusion rate by CS mixed with AGB ws lower than AGB alone.