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섬유주절제술 후 시행한 백내장수술이 수술 후 초기 안압 상승에 미치는 위험인자
구원모,임수호,차순철,Won Mo Gu,Su Ho Lim,Soon Cheol Cha 대한안과학회 2014 대한안과학회지 Vol.55 No.11
Purpose: In this study, we investigated the frequency and risk factors for early postoperative intraocular pressure (IOP) elevation after phacoemulsification in patients with a prior trabeculectomy. Methods: We performed a retrospective chart review of 200 eyes (172 patients, study group) with filtering bleb after previous trabeculectomy and 207 eyes (144 patients, control group) without previous trabeculectomy, who underwent temporal clear corneal phacoemulsification with posterior chamber lens implantation. Twelve possible risk factors including age, gender, glaucoma type, interval from trabeculectomy to phacoemulsification, axial length, preoperative IOP, preoperative bleb morphology (height, vascularity), glaucoma medication, and concomitant intraoperative procedures (iris manipulation, anterior vitrectomy, subconjunctival mitomycin C injection) were analyzed to identify independent risk factors using a multivariate logistic regression method. Early postoperative IOP elevation was defined as IOP value ≥ 25 mm Hg or an IOP increase ≥ 10 mm Hg the morning after surgery compared to the preoperative IOP. Results: There was a significant difference in the frequency of IOP elevation between the study group (25 eyes, 12.5%) and control group (6 eyes, 2.9%; <EM>p</EM> < 0.001). The mean early postoperative IOP (15.2 ± 6.7 mm Hg) was significantly higher than preoperative IOP (12.5 ± 4.4 mm Hg) in the study group (<EM>p </EM>< 0.001). Risk factors for early postoperative IOP elevation were low bleb height (odds ratio; OR = 9.995, <EM>p</EM> = 0.003) and iris manipulation (OR = 4.831, p = 0.026) in the study group while risk factors were preoperative use of glaucoma medication (OR = 3.492, <EM>p</EM> = 0.004) and iris manipulation (OR = 34.249,<EM> p</EM> = 0.009) in the control group. Conclusions: Phacoemulsification increases the risk of IOP spike in prior trabeculectomized eyes, especially those with low bleb height and intraoperative iris manipulation. We suggest intraoperative and postoperative efforts to minimize intraocular inflammation and earlier follow-up examination in these patients.J Korean Ophthalmol Soc 2014;55(11):1659-1668
구원모,류석한,박현숙,김창석 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-
This paper was a study on method that transforms a source speaker voice in order to be heard like voice of a specified speaker. It was able to setimate speech signal feature with proposed MFCC method considering property of human auditory. Applying EM algorithm for estimated feature valuse optimal parameter of GMM, we can compose GMM distribution. Composed GMM determined a weighting value of frequency envelope on speech conversion function. With result of experiment applying HNM in order to convert speech, we can verify that speech signal frequency envelope of a source speaker was similarly converted to speech signal frequency envelope fo a specified speaker.
具元謨,金昌錫 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-
The EZW algorithm is encoded by zerotree coding technique using serif-similarity of wavelet coefficients. If the coefficient is larger than the threshold a POS coded, if the coefficients is smaller than minus the threshold a NEG is coded. If the coefficient is the root of a zerotree than a ZTR is coded and finally, if yhe coefficient is smaller then the threshold but it is not the root of a zerotree, than an IZ is coded. This process is repealed until all the wavelet coefficients have been encoded compleatly. This paper was compared to EZW algorithm and a widely available version of JPEG. As the results of compare, it is shown that the PSNR of the EZW algorithm is bettor than JPEG.
출산 직후 발생한 심인성 쇼트 및 심한 폐부종에서 판막치환술 전후의 체외막산소화장치의 이용
구원모,이건,이헌재,김덕실,임창영,Koo, Won-Mo,Lee, Gun,Lee, Hyeon-Jae,Kim, Duk-Sil,Lim, Chang-Young 대한흉부심장혈관외과학회 2001 Journal of Chest Surgery (J Chest Surg) Vol.34 No.4
일시적 혹은 단기간의 심폐보조는 여러 형태의 심부전에서 널리 이용되어 왔다. 이 중 체외막산소화장치는 고식적 치료에 반응없는 환자에서 주로 사용되는데, 소아에서는 자주 이용되어 왔으나 성인에서는 그 적응증이 명확하지 않았으며 결과도 만족스럽지 못했다. 환자는 승모판 협착증을 가진 32세의 여자로 제왕절개술후 발생한 폐부종으로 내원하였다. 내원시 환자는 쇽상태로 강심제, 폐혈관확장제, 이뇨제등에 반응이 없었다. 우측 대퇴정-동맥캐뉼라를 통하여 14시간동안 체외막산소화장치를 이용하였으며, 환자상태는 가동 즉시 호전을 보였다. 이후 양측판막치환술을 시행하였고 수술 후에도 체외막산호화장치를 지속하였다. 체외막산호화장치는 수술시간을 포함하여 모두 62시간동안 가동하였으며, 이탈(weaning)은 안정된 혈류역학, 호전된 폐부종, 기저질환의 교정등을 통하여 성공적으로 이루어졌다. 환자는 판막수술 후 30일째 특별한 합병증없이 퇴원하였다.