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유대현,장세진,김성윤,이중달,강위석,김목현,김태화,변정원,장정순 대한내과학회 1989 대한내과학회지 Vol.37 No.3
Polyarteritis nodosa is one of the necrotizing vasculitis involving predominantly small and medium sized arteries. Polyarteritis nodosa may affect many organs such as kidney, heart, liver, gastrointestinal tract and muscle. In several autopsy studies, gall bladder involvement was found in 10 to 40% of patients with this disease. Rarely polyarteritis nodosa may be presented clinically as acute cholecystitis or chronic cholecystitis. We experienced a case of polyarteritis nodosa presenting as acute cholecystitis, diagnosed by pathological examination of a gall bladder specimen surgically removed.
이혜경,유대현 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.2
This infrequent avulsion injury of the scalp is a result of an accident where the long hair was caught by the roller. In such a case, the strong galeal layer of scalp resists tension, and if this tension becomes extensive, the force is transmitted to galeal attachment site eg. superior orbital rim, zygomatic arch, occipital nuchal line and avulsion finally develops along this line leading to scalp detachment in one piece. In many case, the forehead and eyebrow, the external auricles, or the pericranium were avulsed at the same time. And if the avulsed scalp is not successfully revascularized, a severe cosmetic, functional, psychologic problem may occur. So thesedays, an immediate replantation of avulsed scalp is an essential procedure.Recently.we experienced two cases of total scalp avulsion injury. We will discuss preoperative and postoperative problems and sensitive point that will lead better results.
유대현 한양대학교 의과대학 1998 한양의대 학술지 Vol.18 No.1
Rheumatoid arthritis(RA) is an autoimmune disorder of unknown etiology characterized by symmetric, erosive synovitis and sometimes multisystem involvement. Most patients exhibit a chronic fluctuating course of disease that, if left untreated, results in progressive joint destruction, deformity, disability, and premature death. Optimal management of requires early diagnosis and timely introduction of agents that reduce the probability of irreversible joint damage. The development of immunology and biotechnology have changed the management of RA: a strategy based on long-term treatment with nonsteroidal anti-inflammatory drugs and the addition of second line agents only in a later phase of disease (pyramid theraphy) has evolved to a more aggressive approach with the early intorduction of second line drugs in most patients with RA. Here I would like to review briefly advances of pathogenic mechanisms and current trend of RA treatment.
단순 대칭성 두개골 조기유합증 환자에서의 전두 두개골 재배치술을 위한 새로운 절골술-The Bull's Osteotomy
박병윤,김성민,유대현 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.5
Cranocsynostosis is the term that designates premature fusion of one or more sutures in either the cranial vault or cranial base. Especially scaphocephaly, brachycephaly and trigonocephaly are included in simple symmetric craniosynostosis. In simple symmetric craniosynostosis, the functional deformity is rare, but deformity in external appearance is always a serious problem. The purpose of forehead reshaping in simple symmetric craniosynostosis is recovery of normal cerebral growth and improvement of cranial cosmetic problem by restoration of normal calvarial anatomic structure. Various surgical methods have Bbeen developed in an effort to correct craniosynostosis. Cranial vault remodeling with or without supraorbital band advancement is a widely accpeted method of correcting simple symmetric craniosynostosis. However, the standardized surgical method has not yet been estabilished in reshaping the forehead during cranial vault remodeling of simple symmetric craniosynostosis. The authors developed a new osteotomy method, the bull's osteotomy, which is a limited osteotomy for cranial vault remodeling. It produces posterior tilting of a prominant forehead as well as increased biparietotemporal distance for effective forehead reshaping. We applied this techriaue in 8 scaphocephaly and 2 brachycephaly patients under 5 years of age who have not yet reached bony consolidation. All patinets obtained satisfactory results with properly corrected deformity and no relapse was observed during the follow-up period. This new osteotomy method is simple and effective and a consistant surgical outcome is expected. particularly the contour of the forehead on the frontotemporal area is corrected to have a smooth and natural curvature. Based on our experience using bull's osteotomy, we offer this new surgical technique for managing simple symmetric cranoisynostosis patients.
In Vitro 환경에서 엘라스틴을 혼합한 콜라겐 진피 지지체의 내구성
유대현,홍종원,탁관철 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.1
Purpose: Since the report of artificial dermis manufacturing method using collagen by Yannas in 1980, collagen has been effectively used as dermal substitute with its merits such as, lower antigeneicity, controllable biodegradation rate, and minimal inflammatory cytotoxic properties in the dermal tissue engineering field. However, weak mechanical durability was the main drawback of collagen dermal substitute. To improve its stability, mechanical or chemical cross-linking was used. Despite of such process, its clinical use was restricted due to weak durability. To improve the durability of collagen matrix, we designed elastin-incorporated collagen matrix and compared its durability with conventional collagen matrix.Methods: 15mm diameter with 4mm thick collagen dermal matrix was made according to Yannas protocol by mixing 0.5% bovine collagen and chondroitin-6- sulfate followed by degassing, freeze drying, dehydrodermal cross-linking and chemical cross-linking procedure. In elastin incorporated collagen matrix, same procedure was performed by mixing elastin to previous collagen matrix in 4:1 ratio(collagen 80% elastin 20%). In comparison of the two dermal matrix in vitro tests, matrix contracture rate, strain, tensile strength, was measured and stiffness was calculated from comparative analysis.Results: In terms of matrix contracture, the elastin- incorperated added collagen dermis matrix showed 1.2 times more contraction compared to conventional collagen matrix. However, tensile strength showed 1.6 times and stiffness showed 1.6 times increase in elastin- incorporated matrix.Conclusion: Elastin incorperated collagen matrix manufactured by our team showed increased durability due to improvement in tensile strength and stiffness compared to previous collagen matrix(Integra??).