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국소마취 하 Alloderm단순삽입이식을 이용한 비중격 천공의 치료 1예
양지호,조주완,전석원,김민정 대한이비인후과학회 부산,울산,경남 지부회 2014 임상이비인후과 Vol.25 No.1
Nasal septal perforations are relatively common, affecting up to 0.9% of general population. From early reports, the main cause (66%) of septal perforation was iatrogenic in connection to septal surgery. When septal perforation occurs, it is wise to repair perforation immediately and to insert a connective tissue or acellular dermal graft. Alloderm, in particular, has gained popularity as an interpositional graft in septal perforation repair due to its availability and ease of use. we recently experienced a case of septal perforation caused by previous septoplasty in a 21-year-old-male patient. The nasal septal perforation was repaired with acellular human dermal graft Alloderm
양지호,김동길,김정선 한국통신학회 1990 韓國通信學會論文誌 Vol.15 No.6
본 논문은 지능망 서비스 제어 시스템에서 시스템의 신뢰도와 고가용성을 증진시키기 위해 LAN을 이용하여 시스템의 중요부분을 부하분담 구조 또는 중복구조로 다중화 시켰을 경우 이를 효율적으로 운영관리하기 위한 망 상태관리 알고리즘인 계층적 제어 알고리즘을 제안한다. 제안된 알고리즘 검증을 위해 Petri-net을 이용하여 알고리즘을 모델링하고, reachabilaty tree 를 구성하여 알고리즘이 특정 노드의 장애발생과 무관하게 항상 운영 가능하며 알고리즘이 무결함을 입증하였다. 또한 기존방식과 제안된 방식간의 비교를 위해 망 상태 관리를 위하여 요구되는 메세지 트래픽의 양이 집중제어방식과 거의 유사함을 알수 있었다. This paper proposes a hierarchical control algorithm for an efficient network management of a loosely-coupled system which consists of functional division and duplicating structure with a LAN to enhance reliability and availability. The algorithm is modeled using the Perti-net and verified with the reachability tree. Here, the proposed algorithm is compared with the purely centralized control algorithm and distributed control algorithm in terms of message traffic for the network management. The result shows that the message traffic related to system performance is as low as centralized control algorithm and the system availability is independent of a specific processor failure.
각막 교차결합술을 시행받은 원추각막 환자에서 각막전면높이 변화에 따른 결과 분석
양지호,진경현,Ji Ho Yang,MD,Kyung Hyun Jin,MD,PhD 대한안과학회 2013 대한안과학회지 Vol.54 No.2
Purpose: To report the results according to anterior elevation changes following corneal crosslinking (CXL) treatment for keratoconus. Methods: The present retrospective study included 14 patients (15 eyes) with progressive keratoconus who underwent CXL with a follow-up of 12 months. Patients were classified into 2 groups according to pre and postoperative anterior elevation difference maps. On the preoperative anterior elevation map, distances from maximum anterior elevation to pupil center were compared between the 2 groups. The outcome of best correct visual acuity (BCVA), maximum keratometry and parameters of corneal topography were compared between the 2 groups before CXL as well as 6 and 12 months after CXL. Results: The anterior elevation changes were classified as group 1 (-7.88 ± 10.53 μm) or group 2 (8.71 ± 5.99 μm) (p = 0.001). The preoperative corneal topography of eyes observed in group 1 (0.19 ± 0.13 mm) had shorter mean distances from maximum anterior elevation to pupil center than eyes in group 2 (0.47 ± 0.23 mm) (p = 0.018). BCVA (log MAR) improved from 0.68 ± 0.78 to 0.57 ± 0.81 (p = 0.115) 12 months after CXL in group 1 and decreased from 0.51 ± 0.34 to 0.56 ± 0.38 (p = 0.109) 12 months after CXL in group 2. The maximum keratometry decreased from 63.01 ± 19.07D to 58.95 ± 16.32D (p = 0.017) in group 1 and increased from 60.70 ± 9.46D to 61.29 ± 7.51D (p = 0.674) in group 2. Conclusions: Clinical and optical effects improved postoperatively in group 1, and were stabilized in group 2. The preoperative distance from maximum anterior elevation to pupil center and the anterior elevation changes after CXL were factors in predicting the CXL outcome.
양지호,김병수,김봉철,윤정훈 대한구강악안면병리학회 2020 대한구강악안면병리학회지 Vol.44 No.2
Nasopalatine duct cyst is a developmental non-odontogenic cyst caused by the entrapment of remnants during embryologic fusion. Only a few cases have reported the intraluminal amorphous calcification in these cysts. This case showed a well-demarcated, unilocular lesion containing calcifications, which were later turned out to be cartilage graft at previous surgery. We report here this case to emphasize the need for thorough medical history taking.
전방경유 경추부수술후 발생한 식도천공 : 증례 보고 Case Report
양지호,전신수,이경진,성우현,최창락 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.4
The authors experienced 4 cases of esophageal perforations following anterior ceMcal spine surgery. All occurred within a few days in the postoperative period Diagonosis was made by clinical suspision and confirmed by esophography or reexploration. This complication attributed to s h q blade penetration of a retraction during Surgery. infection and use of hardware. 3 cases were successfully treated by drainage, tube feeding and parented antibiotics. But unfortunately, 1 case was fatality. Although conservative treatment is required prolonged hospitalization, drainage, tube feeding and parented antibiotics are recommended treatment
중증 진행 원추각막 환자에서 각막 교차결합술을 시행한 2예
양지호,김태기,진경현 대한안과학회 2012 대한안과학회지 Vol.53 No.6
Purpose: To report 2 cases of far-advanced keratoconus with a high value of maximum keratometry and very thin corneas treated with corneal crosslinking (CXL). Case summary: The thinnest corneal thickness of an 18-year-old woman with maximum keratometry of 106.5 D (case 1) was 335 μm. The thinnest corneal thickness of a 43-year-old man with maximum keratometry of 120.3 D (case 2) was 345 μm. The two cases underwent a customized topography and pachymetry-guided epithelial debridement technique to preserve the epithelium where the cornea was within 2 mm around the cone and subsequent CXL. Postoperative maximum keratometry was 97.2 D 24 months after CXL in case 1 and 109.3 D 18 months after CXL in case 2. Postoperatively, the thinnest corneal thickness was 343 μm in case 1 and 162 μm in case 2. The corneal thickness in case 1 was stabilized during the follow-up examination. The pupil center and apex of the corneal thickness in case 2 with the higher maximum keratometry was stabilized, but the thinnest corneal thickness was decreased immediately after CXL and did not recover before CXL. Conclusions: CXL was performed in 2 cases of far-advanced keratoconus. Results showed reduced maximum keratometry but, variable values in corneal thickness during the follow-up examination in the 2 cases. Longer follow-up is necessary, and CXL should be performed cautiously, especially for patients with far-advanced keratoconus. J Korean Ophthalmol Soc 2012;53(6):872-879