1.Aneurysms of the superficial temporal artery.
Myung Jai KANG ; Myung Soon KIM ; Sang Keun YOON ; Hun Joo KIM
Journal of the Korean Radiological Society 1993;29(1):9-13
Aneurysm of the superficial temporal artery is rare. We reviewed seven cases of aneurysm of the superficial temporal artery, which were confirmed surgically and angiographically. The results were as follows: The most common site of aneurysm was left superficial temporal artery, major feeding artery was anterior branch of superficial temporal artery, mean diameter was 7.8mm×12.6mm, and all aneurysms showed lobulated margin with intraluminal filling defects.
Aneurysm*
;
Arteries
;
Temporal Arteries*
2.A case of Congenital Factor X III Deficiency.
Sei Woo CHUNG ; Myung Ik LEE ; Don Hee AHN ; Keun Chan SOHN ; Jin Sook HONG ; Dong Hun YOON
Journal of the Korean Pediatric Society 1986;29(5):89-94
No abstract available.
Factor X*
3.Influence of Patent Ductus Arteriosus and Its Treatment on Retinopathy of Prematurity.
Myung Hun YOON ; Wan Ki BAEK ; Yeon Sung MOON
Journal of the Korean Ophthalmological Society 2013;54(5):728-735
PURPOSE: This study investigated the influence of patent ductus arteriosus (PDA) and its treatment on incidence and progression of retinopathy of prematurity (ROP). METHODS: The authors retrospectively reviewed the medical records of 408 infants who underwent screening examinations for ROP at the Neonatal Intensive Care Unit of our hospital. RESULTS: The total incidence of ROP was 23.5% (96 out of 408) and the patients that needed treatment were 7.4% (30 out of 408). The mean birth weight and gestational age was 1406.1 grams and 30.67 weeks in patients without ROP, and 979.8 grams and 27.46 weeks in patients with ROP, respectively. In both total and very low birth weight (VLBW) patients, the incidence of ROP was higher in the PDA group than the non-PDA group, but the PDA group was an independent risk factor only in the VLBW group (p = 0.033). The incidence of threshold disease was not significantly different between the PDA and control groups (p = 0.757). There was no significant difference of incidence of ROP and threshold disease among the 3 treatment groups for PDA. CONCLUSIONS: In VLBW patients, the presence of PDA increased the risk of ROP and its progression, thus more attention is needed for PDA patients. However, there was no significant difference in ROP incidence and progression according to different PDA treatment methods.
Birth Weight
;
Diterpenes
;
Ductus Arteriosus, Patent
;
Gestational Age
;
Humans
;
Incidence
;
Infant
;
Infant, Newborn
;
Infant, Very Low Birth Weight
;
Intensive Care, Neonatal
;
Mass Screening
;
Medical Records
;
Retinopathy of Prematurity
;
Retrospective Studies
;
Risk Factors
4.Periodontal tissue response following different types of fixed retainers in young adult dogs.
Myung Hun JO ; Young Jooh YOON ; Kwang Won KIM
Korean Journal of Orthodontics 2001;31(1):85-95
The purpose of this study was to evaluate the material for fixed type retainer, allowing physiologic tooth movement. and proper remodeling of periodontal tissue during retention period. The present study was performed to observe the histologic changes of periodontal tissue after application of different types of fixed type retainer after orthodontic tooth movement in young adult dogs. For this study, 4 young adult dogs were used as a experimental animal and experimental group was divided into three groups ; experimental group 1 contained right side maxillary third incisors and canines, experimental group 2 contained contralateral teeth of same animals, and control group contained mandibular premolars. And each dogs were applied the 4 different types of fixed type retainer to experimental group 1. The experimental teeth were ligated on the Sentalloy closed coil spring(R)(Tomy Co., Japan) from maxillary third incisors and canines and applied orthodontic force at initial 200gm-forced during 1 week. All the experimental animals were sacrificed on the 3rd week after the orthodontic teeth movement and then the specimens were taken, fixed in formalin, embeded in parafin, sectioned 6-8micrometer in thickness and stained with Hematoxylin-Eosin staining, and Masson's trichrome staining method. Examined under the light microscopy. The following results were observed. 1. There were observed that decreased infiltration of giant cells in pressure side and increased the new bone forming in tension side on the specimen of 6-stranded 0.0195' Respond(R)(G&H Co., U.S.A.) group. Periodontal ligament fibers were much compressed or elongated in 3-stranded 0.018', 0.020' Dentaflex(R)(Dentarum Co., Germany), and Superbond C&B(R)(Sun Medical Co., Japan) groups. 2. In experimental group 1, necrotic bone inside the alveolar bone of pressure side, forming of the sharpey's fiber in osteoid tissue, and remodeling of the periodontal ligament were observed in all animals. 3. In experimental group 2, it was observed that the amount of bone resorption was equal or decreased in pressure side, and increased new bone forming and significantly decreased infiltration of giant cell than the experimental group 1. By this results, it considered that 6-stranded Respond(R)(G&H Co., U.S.A.) wire was the most useful material allowing early periodontal tissue remodeling.
Animals
;
Bicuspid
;
Bone Resorption
;
Dogs*
;
Formaldehyde
;
Giant Cells
;
Humans
;
Incisor
;
Microscopy
;
Periodontal Ligament
;
Tooth
;
Tooth Movement
;
Young Adult*
5.Late Postoperative Opacification of Multifocal Intraocular Lens after Vitrectomy in a Diabetic Patient
Myung Hun YOON ; Se Young KIM ; Hee Seung CHIN
Journal of the Korean Ophthalmological Society 2019;60(12):1329-1333
PURPOSE:
We report a case of late opacity of an AT LISA intraocular lens after vitrectomy in a diabetic patient.CASE SUMMARY: A 61-year-old man presented with blurring in the left eye. He had undergone bilateral phacoemulsification and intraocular lens implantation 6 years ago, and vitrectomy with SF₆ gas tamponade in the left eye due to rhegmatogenous retinal detachment 3 years ago. The patient was diagnosed with pre-existing diabetes, hypertension, and coronary heart disease. Examination of the left eye showed round and centrally located whitish fine granular deposits on the surface of the intraocular lens, and zonular rupture from the 3 to 6 o'clock position. The intraocular lens in the right eye was clear. The corrected vision was 0.9 in the right eye and 0.5 in the left eye. The intraocular lens was explanted from the left eye together with the capsular bag, and was examined under light microscopy, histochemical analysis, and with scanning electron microscopy equipped with an energy dispersive X-ray spectroscopy detector with light element capabilities.
CONCLUSIONS
This study was the first to report late postoperative opacity in the multifocal intraocular lens, AT LISA 809M. The possibility of intraocular lens opacity in patients with underlying disease or in those undergoing vitrectomy should be explained prior to corrective procedures.
6.Pharmacogenetic Influence of LOC387715/HTRA1 on the Efficacy of Bevacizumab Treatment for Age-Related Macular Degeneration in a Korean Population.
Haeng Ku KANG ; Myung Hun YOON ; Dae Hyun LEE ; Hee Seung CHIN
Korean Journal of Ophthalmology 2012;26(6):414-422
PURPOSE: The purpose of this study was to determine the pharmacogenetic effects of complement factor H (CFH) Y402H, LOC387715 and high-temperature requirement factor A1 (HTRA1) genotypes on the treatment of exudative age-related macular degeneration (AMD) by intravitreal bevacizumab injection in a Korean population. METHODS: Seventy-five patients diagnosed with exudative AMD were treated with intravitreal bevacizumab (2.5 mg) monotherapy. All patients received three initial intravitreal bevacizumab injections every four weeks and were then treated "as needed" based on clinical findings, optical coherence tomography and fluorescein angiography during the 12 month follow-up period after the third injection. RESULTS: The difference in visual acuity improvement among the three genotypes of LOC387715 were statistically significant at six months post-treatment (logarithm of the minimum angle of resolution; TT, 0.346; GT, 0.264; GG, 0.188; p = 0.037). Among the LOC387715 genotypes, the number of additional injections was lower in patients who had the risk T allele (GG, 2.143; GT, 2.000; TT, 1.575; p = 0.064). There was no significant difference between visual acuity and central macular thickness change in the CFH Y402H polymorphism group during the 12 month follow-up period. However, the TC group of CFH Y402H required more additional bevacizumab injections than the TT group (TT, 1.517; TC, 3.363; p = 0.020). CONCLUSIONS: This study demonstrated that different LOC387715/HTRA1 genotypes resulted in different bevacizumab treatment responses on exudative AMD. Patients with the risk allele had an improved treatment response and less need for additional injections. However, patients with the CFH Y402H risk allele needed more additional injections of bevacizumab in order to improve visual acuity. This study illustrates how pharmacogenetic factors may help determine treatment modality and dosing. This could ultimately provide basic data for 'personalized medicine' in AMD.
Aged
;
Alleles
;
Angiogenesis Inhibitors/administration & dosage/therapeutic use
;
Antibodies, Monoclonal, Humanized/*administration & dosage/therapeutic use
;
DNA/*genetics
;
Female
;
Follow-Up Studies
;
Genotype
;
Humans
;
Intravitreal Injections
;
Macular Degeneration/drug therapy/epidemiology/*genetics
;
Male
;
Pharmacogenetics/*methods
;
*Polymorphism, Genetic
;
Retrospective Studies
;
Serine Endopeptidases/*genetics/metabolism
;
Vascular Endothelial Growth Factor A/antagonists & inhibitors
;
Visual Acuity
7.Comparisons of Clinical Results after Implantation of Three Aspheric Intraocular Lenses.
Kahyun LEE ; Myung Hun YOON ; Kyoung Yul SEO ; Eung Kweon KIM ; Tae Im KIM
Journal of the Korean Ophthalmological Society 2013;54(8):1213-1218
PURPOSE: To compare the clinical 3 months postoperative results of three different 1-piece aspheric intraocular lenses (IOLs): AcrySof IQ SN60WF (Alcon Laboratories, INC, Fort Worth, TX), TECNIS 1-piece ZCB00 (AMO Inc., Santa Ana, CA) and the newly developed enVista MX60 (Bausch & Lomb, Rochester, NY). METHODS: In a total of 62 eyes, 1 of the 3 1-piece aspheric IOLs, AcrySof IQ SN60WF, TECNIS 1-piece ZCB00 or enVista MX60 was implanted after cataract extraction. Best corrected visual acuity (BCVA), uncorrected visual acuity (UCVA), and spherical equivalent were assessed 3 months postoperatively. Total spherical aberration, high order aberration, and modulation transfer function were analyzed. RESULTS: There were no significant differences of UCVA, BCVA, the accuracy of postoperative refractive power, and modulation transfer function among the 3 IOLs. Higher order aberrations of the entire eye and internal optics showed almost no significant differences. CONCLUSIONS: The newly developed IOL, enVista MX60, showed equivalent clinical outcomes as both AcrySof IQ SN60WF and TECNIS 1-piece ZCB00.
Cataract Extraction
;
Eye
;
Lenses, Intraocular
;
Visual Acuity
8.A Randomized, Prospective Clinical Comparison of the Efficacy and Safety of Topical Fluoroquinolone Antibiotics in Ophthalmologic Microsurgery.
Myung Jun KIM ; Jun Hun LEE ; Young Ran YOON ; Hong Kyun KIM
Journal of the Korean Ophthalmological Society 2011;52(12):1440-1447
PURPOSE: To report the results of a clinical comparison study of a prophylactic new generation fluoroquinolone (FQs; levofloxacin 0.5%, gatifloxacin 0.3% and moxifloxacin 0.5%) topical antibiotic regimen administered prior to intraocular microsurgery. METHODS: From May 2007 to April 2010, Trial 1, 214 eyes of 211 patients scheduled for intravitreal injection were randomized into one of three FQ-treated groups or the control (non-treated) group. Patients who were randomized into FQ-treated groups were treated with eye drops containing one of three FQ antibiotics (levofloxacin 0.5%, gatifloxacin 0.3% and moxifloxacin 0.5%) preoperatively four times a day for three days before surgery. The rate of positive bacterial cultures from conjunctival scrapings were assessed and compared. Trial 2, 159 eyes of 159 patients scheduled for cataract surgery were randomized into one of three FQ-treated groups, and treated with eye drops as same method in trial 1. The concentration of antibiotics in the anterior chamber of the eye were measured and compared. RESULTS: The positive bacterial culture rates of trial 1 were 48.9%, 38.3%, 23.4% in the levofloxacin-treated group, the gatifloxacin- group, and the moxifloxacin-treated group, respectively. These rates were all significantly lower than the 70.2% positivity rate observed in the control group. Average antibiotic residue concentrations in the aqueous humor measured in trial 2 were 0.37 +/- 0.49 microg/ml in the levofloxacin-treated group, 0.31 +/- 0.37 microg/ml in the gatifloxacin-treated group and 0.59 +/- 0.72 microg/ml in the moxifloxacin-treated group. These concentrations were not significantly different. There were no reported side effects during the study period. CONCLUSIONS: Eye drops containing new generation FQ antibiotics instilled three days before microscopic ophthalmic surgery can be used safely and effectively for the prevention of postoperative endophthalmitis.
Anterior Chamber
;
Anti-Bacterial Agents
;
Aqueous Humor
;
Aza Compounds
;
Cataract
;
Endophthalmitis
;
Eye
;
Fluoroquinolones
;
Humans
;
Intravitreal Injections
;
Microsurgery
;
Ofloxacin
;
Ophthalmic Solutions
;
Prospective Studies
;
Quinolines
9.Comparison of the Recurrence of RRD in PPV Combined Cataract Surgery with PPV Alone, and Risk Factors in PPV Combined Cataract Surgery.
Hye In PARK ; Myung Hun YOON ; Hee Seung CHIN
Journal of the Korean Ophthalmological Society 2017;58(12):1388-1395
PURPOSE: To compare the recurrence percentage and risk factors of recurrence in rhegmatogenous retinal detachment (RRD) after pars plana vitrectomy (PPV) by in two groups of patients according to combined cataract surgery. METHODS: The recurrence percentage of RRD and risk factors after PPV over 20 years, performed by a single surgeon from January 1997 to September 2016, were retrospectively evaluated by classification into two groups according to combined cataract surgery. The risk factors were the patients' factors (age and sex), duration of disease, preoperative visual analyses, posterior capsular tears (PCR) during cataract surgery, the tamponade used, retinal detachment ranges, macular status, number and position of retinal tears, proliferative vitreoretinopathy (PVR) grade, and vitreous opacity. A total of 158 cases were included in the study. RESULTS: The recurrence percentage of RRD was not associated with combined cataract surgery. In the combined cataract surgery group, PCR (p = 0.020), inferior retinal tears (p = 0.037), and PVR above grade B (p = 0.037) were associated with the recurrence of RRD using univariate logistic regression analyses, but PCR (odds ratio 1.880, p = 0.021) was the only significant risk factor for RRD using multivariate logistic regression analyses. CONCLUSIONS: Cataract surgery can be performed at any time, but there should be consideration of the recurrence of RRD if there was PCR during combined cataract surgery.
Cataract*
;
Classification
;
Humans
;
Logistic Models
;
Polymerase Chain Reaction
;
Recurrence*
;
Retinal Detachment
;
Retinal Perforations
;
Retrospective Studies
;
Risk Factors*
;
Tears
;
Vitrectomy
;
Vitreoretinopathy, Proliferative
10.Control of Refractory Ascites by Dialytic Ultrafiltration in Patients with Advanced Liver Cirrhosis.
Sang Jin HAN ; Eui Hun JEONG ; Gwang Ho BAIK ; Dong Seok YOON ; Myung Bin KIM ; Moon Soo KOH ; Ja Ryong KOO ; Ung Ki JANG ; Dong Jun KIM
Korean Journal of Medicine 1997;53(5):628-635
BACKGROUND: Currently the most common treatment modality of refractory ascites in patients with liver cirrhosis was large volume paracentesis, but this procedure usually needed albumin infusion and occasionally developed unwanted complications. By reason of albumin shortage in Korea and occasional unfavorable complications, we studied the usefulness of dialytic ultrafiltration as an another treatment modality of refractory ascites. METHODS: Dialytic ultrafiltration was done in 10 patients (total 48 times) with liver cirrhosis or hepatocellular carcinoma. Two drainage conduit (via 16 gauge angio-catheter) of input and output were made by puncture of patient's right and left lower quadrant abdomen. The initial ultrafiltration rate of dialyser was 250mL/min. Ascitic fluid was removed continuously until the filtration rate down at 50mL/min. After ultrafiltration, ascitic fluid contained concentrated albumin and large molecules was reinfused via input conduit. Pre-treatment and post-treatment level of blood chemistry, plasma renin concentration, aldosterone, and electrolytes in serum; total protein and albumin in ascites were measured. During the ultrafiltration, we closely observed the change of blood pressure, heart rates and mental status. RESULTS: The mean ultrafiltration time was 231+/-28min, ultrafiltrated volume was 5.15+/-1.41 L. During dialytic ultrafiltration, patient's blood pressure and heart rate were stable and there was no change of mental status. After dialytic ultrafiltration, blood urea nitrogen level significantly decreased from 30.5+/-23.7mg/dL to 25.7+/-20.2mg/dL; serum aldosterone level decreased from 807.3+/-301.1pg/ml to 431.1+/-187.2pg/ml in serum (P<0.01). The albumin level in the ascitic fluid significantly increased from 0.67+/-0.28g/dL to 1.90+/-1.16g/dL (P<0.01). Plasma renin concentration level tend to decreased (P=0.06). The patient's serum total protein, albumin, electrolytes, and creatinine were not changed. Complications of dialytic ultrafiltration were peritonitis (one case) and hypotension (one case). But these unwanted complications were readily managed by adequate antibiotics and intravenous fluid therapy. CONCLUSION: The dialytic ultrafiltration can be used effectively without albumin infusion in the treatment of refrartory ascites in patients with advanced liver cirrhosis.
Abdomen
;
Aldosterone
;
Anti-Bacterial Agents
;
Ascites*
;
Ascitic Fluid
;
Blood Pressure
;
Blood Urea Nitrogen
;
Carcinoma, Hepatocellular
;
Chemistry
;
Creatinine
;
Drainage
;
Electrolytes
;
Filtration
;
Fluid Therapy
;
Heart Rate
;
Humans
;
Hypotension
;
Korea
;
Liver Cirrhosis*
;
Liver*
;
Paracentesis
;
Patient Rights
;
Peritonitis
;
Plasma
;
Punctures
;
Renin
;
Ultrafiltration*