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비중격 외비성형술에서 이식 재료로써 Polylactic-Co-Glycolic Acid Plate의 유용성
강재윤,김민수,임세연,박수경,나기상,김용민 대한이비인후과학회 2021 대한이비인후과학회지 두경부외과학 Vol.64 No.9
Background and Objectives Polylactic-co-glycolic acid (PLGA) plate has been recognizedfor its biocompatibility and biomechanical properties and used widely in various clinicalfields. The aim of this study was to evaluate the usefulness and reliability of PLGA plate as agraft material in septorhinoplasty. Subjects and Method Medical records were retrospectively analyzed for patients who underwentseptorhinoplasty including extracorporeal septoplasty from January 2017 to June 2020. We evaluated demographics, diagnosis, operation techniques, and complications of PLGA plateas a graft material used in these patients. Results A total of 33 patients were enrolled in this study. Twenty-eight were male and 5 werefemale. The median age was 32 years old. The follow-up period after surgery was 6-32 months,and the mean follow-up period was 18.03 months. The PLGA plate was used in unilateralspreader graft (n=17), bilateral spreader graft (n=10), batten graft (n=3), strengthening of septalextension graft (n=2) and columellar strut graft (n=3), and fixing L-strut during extracorporealseptoplasty (n=12). During the follow-up period, no patient experienced extrusion orexposure of the grafts. Mild complications, such as redness of the columella skin, granulationin the marginal incision site, and pain on the nasal dorsum were observed in three patients;these complications were temporary and patients improved with conservative treatments. Conclusion The PLGA plate may be a useful graft material in correcting deviated nose especiallywhen the harvested septal cartilage is insufficient and if used carefully in limited locationssuch as L-strut and columella.
Performance of submerged membrane bioreactor with waste lime carrier for wastewater treatment
강재윤,노성희 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
The submerged membrane bioreactor (SMBR) can be defined as a system that combines biological degradation of wastewater effluents with membrane filtration. The major potential advantage of this technology is found in the field of water reuse. Nevertheless, the effective application of membrane bioreactors (MBRs) is limited by membrane fouling and the associated cost and energy burdens. In this work, we investigated the filtration characteristics of the membrane by packing a waste lime support carrier in to the membrane bioreactor process to improve the removal efficiency of nutrients and to minimize membrane fouling.