무선랜과 블루투스를 위한 주파수합성기 설계 및 제작(2.4GHZ-2.48GHZ)

오형호,최익권 한국통신학회 2000 한국통신학회 학술대회논문집 Vol.2000 No.11

골수강내 금속정 고정을 이용한 경골 분절골절의 치료

오형호,김대진 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

최근의 연구들은 경골 분절 골절에 대한 이해와 치료 방법에 대해 많은 향상을 가져왔지만 여전히 경골 분절 골절의 치료는 많은 문제점을 내포하고 있고 종종 만족스럽지 못한 결과를 초래하고 있다. 이는 경골의 분절골절이 대개 고 에너지 손상에 의해 발생하고 주위의 연부 조직에 심각한 손상을 동반하는 경우가 많기 때문이다. 교합성 골수강내 금속정 고정이 경골 분절골절의 일반적 치료방법으로 자리잡고 있는데 이 방법은 장관골 간부 골절에 있어 가장 안정적인 고정을 할수 있고 그로 인해 조기 거동과 체중 부하를 허용함으로써 기능회복에 좋은 결과를 초래하기 때문이다. 저자들은 1991년 1월부터 1994년 4월까지 19례의 경골 분절골절에 대해 교합성 골수강내 금속정 고정을 이용해 치료하고 다음과 같은 결과를 얻었다. 1.19례 모두에서 부가적인 치료방법없이 골유함을 얻었다. 2. 9례에서 근위 골절부위는 각형성이 된 채로 고정되면서 골유함이 지연되었다. 이러한 경향은 근위 골절부가 슬관절에 근접할수록 증가하였다. 3. 골수강내 금속정을 이용한 경골 분절골절의 치료에 있어 근위골절부의 정확한 정복과 고정은 난제로 남아 있어 이를 해결할 수 있는 수술방법의 개발이 필요할것으로 사료된다. Locked Intramedullary Nailing for Tibial Segmental Fracture Department of Orthopaedic Surgery, College of Medicine, DongGuk University Hyung Ho Oh M.D., Dae Jin Kim M.D. Although studies in recent years have significantly improved the understanding and treatment of segmental fractures of tibia, the treatment of segmental fractures of the tibia poses many problems and often the results are unsatisfactory, presumably because of the serious damage to surrounding soft tissues that usually occurs by the high energy injury. Interlocking intramedullary nailing has become more popularized because it is one affords of the most stable fixation for shaft fractures of long bones, which enables early mobilization and weight bearing and provide good functional recovery. We experienced nineteen segmental tibial fractures from January 1991 to April 1994.They were treated by interlocking intramedullary nails. The results were as follows. 1. In all the 19 cases, union was achieved without any additional procedures 2. In 9 cases, proximal fracture sites were fixed and united in angulated positions and union was delayed, especially when the proximal fracture site was close to the knee joint. 3. On managing segmental fractures of tibia with intramedullary nailing, proximal fracture site seems to have more difficulties in accurate reduction and fixation, so operative technical innovation and development in the fixation device seems to be necessary.

관혈적 정복 및 내고정을 이용한 쇄골 간부 골절의 치료

김용민,오형호,조윤철 대한골절학회 1996 대한골절학회지 Vol.9 No.4

Clavicular shaft fracture is one of the most common fractures, which had been managed via conservative methods with some exceptions such as nonunion. Open treatment had been regarded even as important cause of nonunion and poor outcomes. Nowadays, however, the goal of fracture treatment has become anatomical reduction, rigid fixation and early rehabilitation for better final results. According to this principle, we managed 21 clavicular shaft fractures with open reduction and internal fixation(12; plate fixation. 9: intramedullary pinning) since l991 to 1993. All the fractures united within postoperative 10 weeks(mean 6.4) without any remarkable complications such as nonunion, infection, and limited shoulder motion. In some intramedullary pinning cases, skin irritation at pin site was troublesome, but disappeared after removal of the pin. Likewise other long bone fractures, open reduction and internal fixation seemed to be one of the useful method in the treatment of clavicular shaft fractures, especially in displaced, and comminuted ones.

죽초액을 활용한 악취제거 시스템 개발

정우술,오형호,아삼식,Jeong, U-Sul,O, Hyeong-Ho,A, Sam-Sik 한국상하수도협회 2006 한국상하수도협회지 Vol.13 No.-

골반부의 둔상후 발생한 지연성 장골근내 혈종 - 증례 보고 -

김용민,정필현,황정수,강석,오형호,박민효,조윤철 대한골절학회 1995 대한골절학회지 Vol.8 No.3

Intramuscular hematoma in inner pelvic wall may not be a common problem for orthopaedic surgeons. It may be associated with fractures of pelvic bone, or bleeding tendency from various reasons Usually these hematomae are managed conservatively because they have no harmful effect to the patient, their position makes it difficult to approach. Furthermore, the diagnosis of the hematomae is not simple, so suspicion is important for its diagnosis. We experienced one case of delayed intramuscular hematoma in iliacus muscle in a 16-year old boy who had suffered blunt trauma to the pelvic area five weeks before. MRI had a signiticant role in the diagnosis of the hematoma. After evacuation of the hematoma, the patient recovered to normal status. Concerning about its unusual course and diagnostic significances of MRI, we report this case after reviewing of the literatures.

소아 상완골의 굴곡형 과상부 골절

김대진,정필현,강석,채동주,오형호 대한골절학회 1996 대한골절학회지 Vol.9 No.4

The flexion type. supracondylar fracture of the humerus is a rare injury of the elbow in children. It is known as difficult fracture to achieve and maintain reduction and is associated with relative high incidence of complications such as ulnar nerve injury, varus deformity and limited range of motion of the elbow. We have experienced 6 cases of flexion type supracondylar fracture of thehumerus in children. We performed closed reduction and perculsneous pinaing in type II fracture and in type I fracture, open reduction and internal fixation was performed because closed reduction was failed. The result were generally excellent. Full range of motion of the elbow and under 5 degree varus or valgus deformity resulted in. We become to believe that the aggressive approaches-even open reduction in type III fracture-provide good results and decrease the complications mentioned previously.

제 1 중족지간 및 족근-중족 관절 탈구

김용민,김종필,황정수,안영언,오형호 대한골절학회 1995 대한골절학회지 Vol.8 No.2

Dislocation of first metatarsophalangeal joint is a rare condition. Anatomically, the head of first metatarsal is stabilized by various soft tissue structures associated with the sesamoid bones. When the metatarsal head was entrapped underneath the 'sesamoid complex', it might be impossible to gain reduction via closed method. We experienced a case of dorsal dislocation of first metatarsophalangeal joint and associated dislocation of tarsometatarsal joint in a 32 year old man who was injured by fall from height. Closed reduction failed even under spinai anesthesia. Open reduction via medial approach revealed 'buttonholing' of the metatarsal head under the sesamoid complex, which had made colsed reduction impossible. Concerning about the rarity and anatomical characteristic of these injuries, we report this case with reviewing of the literatures.

원위 대퇴골의 고립성 골연골종에서 발생한 속발성 연골 육종 1례 보고

정필현,황장수,강석,김용민,오형호,채동주,김종필 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

연골육종은 비교적 서서히 자라며 늦게 전이하는 악성 연골 종양으로 알려져 있다. 골 연골종에서 발생한 속발성 연골육종은 발생빈도는 드물며 타부위로의 전이가 적고 악성도가 낮은 경우가 많아 적합한 수술적 치료로서 좋은 예후를 보이는 것으로 보고되고 있다. 본 동국대학교 정형외과학 교실에서는 우측 대퇴골 원위부 골간단부에 생긴 고립성 골 연골종에서 이차적으로 발생한 연골육종을 치험한 바 문헌고찰과 함께 보고하는 바이다. A case of Secondary Chondrosarcoma Arising from Solitary Osteochondroma of the Distal Femur Department of Orthopaedic Surgery, College of Medicine, DongGuk University Phil Hyun Chung M.D., Jung Su Hwang M.D., Suk Kang M.D., Yang Mln Kim M.D., Hyung Ho Oh M.D., Dong Ju Chae M.D., Jong Pil Kim M.D. Chondrpsarcoma is a malignant cartilage-forming tumor that grows slowly and metastasis of this tumor occurs in late stage. Secondary chondrosarcomas arising from a solitary osteocartilaginous exostosis are rare and those have a better prognosis than other chondrosarcomas, and they rarely metastasize. We present our experience with a case of secondary chondrpsarcoma arising in solitary osteochondroma of distal metaphysis of right femur with clinical details.

골 및 연부 조직 종양에서의 미세 침 흡입 세포 검사

이수용,전대근,이종석,김석준,조경자,오형호,박민효,박현수,장진대,Lee, Soo-Yong,Jeon, Dae-Geun,Lee, Jong-Seok,Kim, Sug-Jun,Cho, Kyung-Ja,Oh, Hyung-Ho,Park, Min-Hyo,Park, Hyun-Soo,Jang, Jin-Dae 대한근골격종양학회 1996 대한골관절종양학회지 Vol.2 No.1

From January 1994 to August 1995 we performed 270 cases of fine needle aspiration cytology for bone and soft tissue lesions. Among them 137 cases were diagnosed histologically. Sixty-seven cases were benign and 70 cases were malignant. We analysed these on the aspect of sensitivity, specifity, positive predictive value, negative predictive value of the cytologic examination. Malignant cases consisted of bone tumor 29 cases; soft tissue tumor 25 cases; and metastatic tumor 16 cases. The sensitivity and specifity of the aspiration cytology for malignant tumor were 67.8% and 97%, respectively. The positive and negative predictive value of aspiration cytology were 97.4% and 72.7%, respectively. Among them 40 cases were primary bony lesions; 14 benign lesions, 26 malignamt bone tumors. Sensitivity of aspiration cytology for these primary bony lesion was 90%(18/20) and its specifity was 100%(13/13). Three cases showed atypical cells in cytology but with biopsy we could find them as one benign and two malignancies. Two cases of manignancy showed negative result in cytology; one was parosteal sarcoma of proximal femur and the other was osteosarcoma of proximal tibia which was biopsied already at other hospital. Although the overall sensitivity and specifity for malignant bone and soft tissue tumors were relatively low and not so predictable, the fine needle aspiration cytology for primary bony lesion was useful in the differential diagnosis of benign or malignancy.

족관절 내과 골절으 동반한 경골 간부골절

김용민,김종원,유문집,정필현,차응남,강석,오형호 대한골절학회 1993 대한골절학회지 Vol.6 No.2

Fractures of tibial shaft accompanied by ipsilateral medial malleolar fracture are rare. It is probably due to different mechanism of injury. Usually tibial shaft fractures are caused by direct force applied to the fracture site or violent rotational farce: exerted to some distant area. Medial malleolar fractures are caused by rotational or valgus, varus force exerted to the foot. Many modalities of the treatment can be employed in such cases, including conservative, operative, or mixed. By the way with any kind of treatment, if stable fixation can be achieved for both fractures, early mobilization and weight bearing can be permitted and more satisfactory outcome can be expected. Since August 1990, we experienced 4 cases of ipsilateral tibial shaft and medial malleolar fracture. All the cases were associated with automobile accident. Internal fixation using intramedullary nailing was performed for the tibial shaft fractures. And fixation using tension band wiring, threaded K-wires, malleolar screws was performed for the medial malleolar fractures, respectively. The results are as tollows; l. In 3 cases, the mechanism of injury was considered as direct valgus force to both the tibial shaft and medial malleolus because the foot was fixed. In the other case, different forces were thought to be responsible for each fractures. 2. In two cases, union of the tibial shaft fracture was achieved within postop. 4 months. In another case, complete union was achieved at 15 months from the injury after augumentation bone graft. In the other case, augumentation bone graft was performed at postop. 4 months, and union was achieved at post trauma 8 months. 3. In all cases, the medial malleolar fractures united in 8 weeks postoperatively.