2.Stability and Sterility of Bevacizumab after Withdrawal into a Syringe and Refrigeration or Freezing.
Gwang Myung NOH ; Soo Young KIM ; Ki Yup NAM ; Seung Uk LEE ; Young Ho KIM ; Sang Joon LEE
Journal of the Korean Ophthalmological Society 2014;55(10):1499-1503
PURPOSE: The aim of this study was to evaluate the stability and sterility of bevacizumab (Avastin, Genentech, Inc., San Francisco, CA, USA) after withdrawal into multiple doses from single-use vials. METHODS: Bevacizumab was repeatedly and aseptically drawn from new vials into 1 cc plastic syringes and refrigerated in the dark at 4degrees C for 0, 3, 6, 12, 28, 38, 46, 52, or 63 weeks or at -10degrees C for 0, 3, 6, 12, 38, 46, or 52 weeks. The stability of bevacizumab was assessed by enzyme-linked immunosorbent assay (ELISA) and compared with that of controls (0 weeks). The contents of the fractionated bevacizumab syringes were analyzed for microbial growth. RESULTS: When we assessed the relative stability of the bevacizumab stored at 4degrees C, there was no concentration change for up to 12 weeks. However, concentration decreased by less than 2% between 28 weeks and 46 weeks. Samples stored at -10degrees C were stable up to 52 weeks. All of the fractionated syringes maintained >90% stability compared with controls for up to one year in both the refrigerated group and the frozen group. The microbial study showed no significant positive results for up to 12 weeks. After intravitreal bevacizumab injection, the statuses of all patients improved, with no signs of intraocular infection. We observed no cases of intraocular infection or complications among the patients. CONCLUSIONS: Fractionating and storing smaller amounts from single-use vials is a safe method for intravitreal bevacizumab injection.
Enzyme-Linked Immunosorbent Assay
;
Freezing*
;
Humans
;
Infertility*
;
Intravitreal Injections
;
Plastics
;
Refrigeration*
;
Syringes*
;
Bevacizumab
3.Macular Ischemia Correlated with Final Visual Outcome in Retinal Vein Occlusion Patients.
Gwang Myung NOH ; Ji Eun LEE ; Ki Yup NAM ; Seung Uk LEE ; Sang Joon LEE
Journal of the Korean Ophthalmological Society 2014;55(10):1493-1498
PURPOSE: To identify the correlation between final visual outcome after at least 6 months of follow-up and the extent of macular ischemia on the first visit. METHODS: We performed a retrospective clinical analysis of macular ischemia using clinical records, fundus examinations, and fluorescein angiographies in 83 patients (86 eyes) diagnosed with retinal vein occlusion from January 1998 to July 2012 and followed up for over 6 months. We evaluated the extent and the location of macular ischemia, macular edema, initial and final visual acuities and systemic disease based on fluorescein angiography and optical coherence tomography performed within 2 weeks of the first visit. The patients were divided into the following 4 groups based on the extent and location of macular ischemia and edema: superotemporal, superonasal, inferotemporal, and inferonasal. RESULTS: Retinal vein occlusions (RVOs) consisted of 24 central RVOs (CRVOs) and 62 branch RVOs (BRVOs). Mean initial acuity (log MAR) was 0.35 +/- 0.31 (36 eyes) in the no macular ischemia group, 0.40 +/- 0.21 (11 eyes) in the 1-quadrant macular ischemia group, 0.71 +/- 0.32 (26 eyes) in the 2-quadrant macular ischemia group and 0.73 +/- 0.36 (13 eyes) in the over 3 quadrants macular ischemia group. Mean final acuity (log MAR) was 0.23 +/- 0.23 in the no macular ischemia group, 0.40 +/- 0.30 in the 1-quadrant macular ischemia group, 0.51 +/- 0.32 in the 2-quadrant macular ischemic group and 0.73 +/- 0.31 in the over 3 quadrants macular ischemia group. CONCLUSIONS: The initial and final visual outcomes were worse when more quadrants were affected by macular ischemia. The extent of macular ischemia was correlated with initial visual acuity and final visual outcome but not with macular edema.
Angiography
;
Edema
;
Fluorescein
;
Fluorescein Angiography
;
Follow-Up Studies
;
Humans
;
Ischemia*
;
Macular Edema
;
Retinal Vein Occlusion*
;
Retrospective Studies
;
Tomography, Optical Coherence
;
Visual Acuity
4.Recurrent Enterococcus faecalis Endophthalmitis
Gwang Myeong NOH ; Ki Yup NAM ; Seung Uk LEE ; In Dal PARK ; Sang Joon LEE
Korean Journal of Ophthalmology 2019;33(2):200-201
No abstract available.
Endophthalmitis
;
Enterococcus faecalis
;
Enterococcus
5.Precipitation of Vancomycin and Ceftazidime on Intravitreal Injection in Endophthalmitis Patients
Gwang Myeong NOH ; Ki Yup NAM ; Seung Uk LEE ; Sang Joon LEE
Korean Journal of Ophthalmology 2019;33(3):296-297
No abstract available.
Ceftazidime
;
Endophthalmitis
;
Humans
;
Intravitreal Injections
;
Vancomycin
6.Central Serous Chorioretinopathy Following Intravitreal Dexamethasone Implant
Gwang Myeong NOH ; Ki Yup NAM ; Seung Uk LEE ; Sang Joon LEE
Korean Journal of Ophthalmology 2019;33(4):392-394
No abstract available.
Central Serous Chorioretinopathy
;
Dexamethasone