1.Platelet monoamine oxidase activity and its relationship to the positive and negative symptoms of schizophrenia.
Sung Hwan YOON ; Young Hoon KIM ; Sung Tae ZIN
Journal of Korean Neuropsychiatric Association 1991;30(1):38-46
No abstract available.
Blood Platelets*
;
Monoamine Oxidase*
;
Schizophrenia*
2.Tuberculin skin test in newly employed Health Care Workers.
Sung Won YOON ; Og Son KIM ; Jae Hoon SONG
Korean Journal of Nosocomial Infection Control 1997;2(2):131-136
OBJECTIVES: Health care workers(HCWs) are more likely to become infected with tuberculosis from patients in the hospital. When HCWs have an active tuberculosis infection, it is possible that they also become a source of infections to other HCWs and patients. METHODS: Tuberculin tests were performed with mantoux method using 5 units of tuberculin by infection control practitioners on Feb. 21, and Mar. 7, 1997. A total of 138 newly employed HCWs including 44interns and 94 nurses were tested. Results of skin test were interpreted by themselves according to the instructions. RESULTS: Among 138 personels, skin tests were negative in 27 personels (19.6%); 4 interns (9.1%) and 23 nurses (24.5%). There were 3 persons (2.2%) who had a history of tuberculosis which had been treated. CONCLUSION: The study showed that approximately 20% of newly employed HCWs had negative tuberculin skin test. Given the possibility of being infected with tuberculosis in the hospital, regular follow up of tuberculin skin test is warranted to protect HCWs,
Delivery of Health Care*
;
Humans
;
Infection Control Practitioners
;
Skin Tests*
;
Skin*
;
Tuberculin Test
;
Tuberculin*
;
Tuberculosis
3.Infection Control Activities in Samsung Medical Center.
Sung Won YOON ; Og Son KIM ; Jae Hoon SONG
Korean Journal of Nosocomial Infection Control 2000;5(1):51-59
No Abstract available.
Infection Control*
4.A case of intraperitoneal hemorrhage of round ligament pregnancy.
Heung Yeol KIM ; Taek Hoon KIM ; Sung Do YOON
Korean Journal of Obstetrics and Gynecology 1992;35(7):1092-1095
No abstract available.
Hemorrhage*
;
Pregnancy*
;
Round Ligament of Uterus*
5.Percutaneous Balloon Mitral Vavuloplasty under General Anesthesia in Patient with Mitral Stenosis and Schizophrenia.
Jung Han YOON ; Keum Soo PARK ; Kyung Hoon CHOE ; Kyung Bong YOON ; Sung Oh HWANG
Korean Circulation Journal 1992;22(6):1050-1054
Since the introduction of percutaneous mitral valvotomy(PMV) in 1984, PMV was an effecive alternative to surgical commissurotomy in selected patients with severe mitral stenosis. Also PMV was an excellent palliative strategy in such patients who were high risk for operative management or longterm anticoagulation was not feasible. We performed PMV in a patient with very tight mitral stenosis and severe pulmonary hypertension under the general anesthesia because the patient was anticipated to be uncooperative due to mental problem, who was diagnosed as schizophrenia 16 years ago. Robinol was used for premedication and i.v fentanyl was used for maintenance of anesthesia. Inoue balloon was introduced into the LV and gradual ballooning was performed with favorable results. Total anesthesia time and interval from internal jugular vein puncture to the completion of valvuloplasty were 1 hour 45 min and 40 minutes respectively. Hemodynamic variables were improved immediately after intervention and mitral valve area was increased from 0.5cm2 to 1.3cm2.
Anesthesia
;
Anesthesia, General*
;
Fentanyl
;
Hemodynamics
;
Humans
;
Hypertension, Pulmonary
;
Jugular Veins
;
Mitral Valve
;
Mitral Valve Stenosis*
;
Premedication
;
Punctures
;
Schizophrenia*
6.Whitening Effect of Cosmetics Containing Magnesium L-Ascorbyl-2-Phosphate(VC-PMG, Vitamin C Derivatives) Assessed by Colorimeter.
Yoon Kee PARK ; Yoon Kee PARK ; Won Soon CHUNG ; Hoon LEE ; Sung Won JUNG
Annals of Dermatology 2002;14(2):63-70
BACKGROUNDS: An inhibitory effect of magnesium L-ascorbyl-2-phosphate (VC-PMG, a stable derivative of ascorbic acid) on melanogenesis has been described. Furthermore, glabridin in licorice is known to have inhibitory effects on melanogenesis and widely used for raw materials for depigmenting agents. OBJECTIVE: The purposes of this study are to provide objective data by measuring the visual clinical effects of VC-PMG with the colorimeter and to promote the development of de-pigmenting agents. METHODS: 20 volunteers joined the study. With an artificial UVB irradiation, eight tanned areas were made on the inner side of the forearm. During two months, each tanned area was treated with five whitening cosmetics with 3% VC-PMG and increasing concentration of licorice from 0% to 3%. Darkness degree of each area was measured weekly by the colorimeter and the visual assessment. RESULTS: For all cosmetics, whitening effect was measured by colorimeter and visual as-sessment. The cosmetic containing VC-PMG 3% and licorice 1% had more whitening effect than any other cosmetics of different concentrations. Moreover, VC-PMG 3% alone also had whitening effect in some volunteers. CONCLUSION: VC-PMG was clinically found to have whitening effect.
Ascorbic Acid*
;
Darkness
;
Forearm
;
Glycyrrhiza
;
Magnesium*
;
Triacetoneamine-N-Oxyl
;
Vitamins*
;
Volunteers
7.Percutaneous drainage of pancreatic abscess and pseudocyst.
Tae Hoon KIM ; Yup YOON ; Young Tae KO ; Jae Hoon LIM ; Dong Ho LEE ; Eil Sung LEE
Journal of the Korean Radiological Society 1993;29(2):268-274
Percutaneous drainage of 4 pancreatic abscesses and 5 pancreatic pseudocysts was performed under the guidance of ultrasonography or fluoroscopy. Clinical inprovement following the percutaneous drainage enabled surgical procedure in 2 of 4 pationts with pancreatic abscesses and obviated surgery in the other 2. In patients with pancreatic pseudocysts, recurrence have nat been observed for the last 3 years. Percutaneous drainage is a safe and effective procedure and could be the method of choice in the management of pancreatic pseudocyst that is symptomatic and enlarging. Percutaneous drainage could play a significant role in the management of the patients with pancreatic abscess.
Abscess*
;
Drainage*
;
Fluoroscopy
;
Humans
;
Methods
;
Pancreatic Pseudocyst
;
Recurrence
;
Ultrasonography
8.Analysis of failed mechanical thrombectomy with a focus on technical reasons: Ten years of experience in a single institution
Sinho PARK ; Dong Hoon LEE ; Jae Hoon SUNG ; Seung Yoon SONG
Journal of Cerebrovascular and Endovascular Neurosurgery 2023;25(1):13-18
Objective:
Mechanical thrombectomy (MT) is an effective treatment for patients suffering from acute ischemic stroke secondary to large vessel occlusion. However, recanalization failure rates of interventions were about 20% in literature studies. We report our experience of unsuccessful MT with a focus on technical reasons.
Methods:
From December 2010 to June 2021, six hundred eight patients with acute ischemic stroke due to large artery occlusion received MT using a stent retriever with or without an aspiration catheter in our institution. We divided the reasons for failure into six categories. We analyzed the reasons for failure by dividing our experience time into 3 periods.
Results:
A total of 608 cases of thrombectomy for large vessel occlusion were identified in the study period. The successful recanalization rate was 90.4%. In most of the cases (20/57, 35%), the thrombus persisted despite several passes, and the second most common cause was termination of the procedure even after partial recanalization (10/57, 18%). Similar proportions of in-stent occlusion, distal embolization, and termination due to vessel rupture were observed. On analysis of three periods, the successful recanalization rate improved over time.
Conclusions
MT fails due to various reasons, and intracranial artery stenosis is the main cause of MT failure. With the development of rescue techniques, the failure rate has gradually decreased. Further development of new devices and techniques could improve the recanalization rates.
9.Multifocal Electroretinogram before and after Epiretinal Membrane Surgery.
Jae Hoon KANG ; Eun Su CHOI ; Jae Moon YOON ; Hee Sung YOON
Journal of the Korean Ophthalmological Society 2008;49(1):104-110
PURPOSE: To assess macular function before and after vitrectomy and membrane removal in epiretinal membranes by means of multifocal electroretinogram (mfERG). METHODS: The mfERGs (RETIscan(R), Roland, Germany) of 28 consecutive patients (28 eyes) with idiopathic epiretinal membranes were recorded before epiretinal membrane surgery and 3 to 6 months after surgery. The average retinal response density and implicit time of each local response were estimated as anatomic macular areas corresponding roughly to 5 rings. Preoperative and postoperative responses of mfERG were compared. The correlation of the change of retinal response density and postoperative macular configuration on optical coherent tomography (OCT) was statistically analyzed. RESULTS: The postoperative value of P1 amplitude and implicit time were not statistically correlated with the preoperative value (p>0.05). There were no significant correlations between the changes of rings 1 and 2 with regard to the retinal response density of the mfERGs and visual acuity. There was no significant correlation between the change of retinal response density and postoperative macular configuration according to OCT. CONCLUSIONS: The use of mfERGs does not seem useful for predicting clinical prognosis after epiretinal membrane surgery. Further studies of influence of internal limiting membrane removal on mfERG response should be conducted.
Epiretinal Membrane
;
Humans
;
Membranes
;
Prognosis
;
Retinaldehyde
;
Visual Acuity
;
Vitrectomy
10.Subretinal Hemorrhage After Photodynamic Therapy for Age-Related Macular Degeneration.
Jae Moon YOON ; Ho Soong KIM ; Jae Hoon KANG ; Hee Sung YOON
Journal of the Korean Ophthalmological Society 2008;49(10):1603-1610
PURPOSE: To evaluate the clinical features of subretinal hemorrhage after photodynamic therapy in eyes with exudative age-related macular degeneration. METHODS: We retrospectively reviewed data for 267 eyes of 243 patients who had undergone PDT for the treatment of ARMD between January 2005 and December 2006. Best corrected visual acuity, fundus photography, fluorescein angiography, and ICG angiography were performed before and after treatment. We followed up the patients at 1 week, 1 month, and 3 months after treatment and at 3-month intervals thereafter. RESULTS: Postoperative subretinal hemorrhage was seen in 36 (13.4%) of 267 eyes. The pretreatment and post-treatment mean visual acuities were logMAR 0.80 and logMAR 1.05 respectively, representing a decrease of 2.05 lines. On FAG, two eyes were predominantly classic, four eyes were minimally classic, and 30 eyes were occult. The laser irradiation spot size was under 3,000 micrometer in one case and from 3,000 micrometer to 5,000 micrometer in 19 cases and over 5,000 micrometer in 16 eyes. CONCLUSIONS: Subretinal hemorrhage after PDT for ARMD can be a common complication in patients who have been treated for larger irradiation spot sizes and for pigment epithelial detachment (PED), so doctors should be aware of the risk of serious hemorrhagic complications in such situations.
Angiography
;
Eye
;
Fluorescein Angiography
;
Hemorrhage
;
Humans
;
Macular Degeneration
;
Photochemotherapy
;
Photography
;
Retrospective Studies
;
Triazenes
;
Visual Acuity