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코눈물관폐쇄 수술 환자에서 눈물주머니누석의 임상병리학적 연구
최승우(Seung Woo Choi),박종서(Jong Seo Park),권아영(A Young Kwon),유혜린(Helen Lew) 대한안과학회 2016 대한안과학회지 Vol.57 No.1
Purpose: To evaluate the correlation between clinical manifestation of patients with nasolacrimal duct obstruction and pathological characteristics of lacrimal sac and dacryolith found during endoscopic dacryocystorhinostomy. Methods: This retrospective study included 158 patients (189 eyes) who received endoscopic dacryocystorhinostomy. We defined lacrimal dacryolith by gross discovery in the lacrimal sac during surgery or findings during pathological examination as dacryolith or calcification, including size and distribution in pathology slides. We correlated the relationship between the patients’ clinical manifestations, surgical results, lacrimal sac's pathological findings including calcification, inflammation and fibrosis, and pathological findings of lacrimal sac dacryolith. Results: Dacryolith was found in 61 eyes (32.3%) and among them, grossly found in 13 eyes (6.9%). Dacryolith's filling defect on dacryocystography was found in 17 eyes (9.0%) and based on grossly found dacryolith, dacryocystography's sensitivity and specificity were 58.8% and 1.7%, respectively. The average size of dacryolith was 0.3 ± 0.8 mm2 with an average distribution of 20.1 ± 17.9%. Distribution of dacryolith and the proportions of inflammatory cells and fibrosis in the lacrimal sac were negatively correlated(p < 0.05). The size of dacryolith and the proportions of fibrosis in the lacrimal sac were also negatively correlated (p = 0.008). In cases where the proportion of calcification in pathology slides was over 50%, the duration of symptoms in the calcification-dominant group was shorter than in other groups (p = 0.006). The success rates of endoscopic dacryocystorhinostomy with dacryolith and without dacryolith were 91.8% and 80.5%, respectively (p = 0.046). Conclusions: The patients with lacrimal sac dacryolith in nasolacrimal duct obstruction showed shorter duration of symptoms, lower fibrosis of lacrimal sac, and higher surgical success rates than the other cases. Therefore, additional research may be necessary to determine the mechanism of dacryolith formation and early treatment in nasolacrimal duct obstruction with lacrimal sac dacryolith.
한무영,김달중,이광형,권아영 대한상하수도학회 2001 상하수도학회지 Vol.15 No.1
The separation of TiO_2-containing wastewater was carried out in an electroflotation reactor that has a set of four aluminum electrodes. The effect of operating parameters on the performance of the reactor was examined. Effective factors in the electroflotation were type and concentration of treatment agent, voltage and run time for the removal of TiO_2. Sodium chloride(NaCI) was an especially effective treatment agent for flocculation of TiO_2 wastewater. The maximum removal efficiency of removal of 97.8% was obtained at optimum conditions such as 36V voltage, 200~300ppm NaCI concentration and above 22minutes run time. Electroflotation was proved to be a very effective separation method in the removal of TiO_2 from wastewater.