1.Study on absolute and relative refractory period of human sensoryfiber.
Hee Kyu KWON ; Cha Hwan KO ; Chung Hie OH
Journal of the Korean Academy of Rehabilitation Medicine 1991;15(1):6-11
No abstract available.
Humans*
2.Improvement of pregnancy rate by micromanipulation in human in vitro fertilization: embryo transfer program.
Hwan Cheol RHO ; Eun Kyung KIM ; Jung Jin KOO ; Jung Jae KO ; Tae Ki YOON ; Kwang Yul CHA
Korean Journal of Fertility and Sterility 1993;20(2):101-105
No abstract available.
Fertilization in Vitro*
;
Humans*
;
Micromanipulation*
;
Pregnancy Rate*
;
Pregnancy*
3.Clinical results of partial zona dissection for infertility.
Sung Eun PARK ; Dong Hee CHOI ; Hwan Cheol RHO ; Jung Jae KO ; Jong Young PARK ; Kwang Yul CHA
Korean Journal of Fertility and Sterility 1993;20(1):45-51
No abstract available.
Herpes Zoster*
;
Infertility*
4.Two Cases of Slipped Capital Femoral Epiphysis in Children Receiving Growth Hormone Therapy.
Hwan Seok LEE ; Eun Ae YANG ; Eun Hui HONG ; Min Hyun CHO ; Cheol Woo KO
Journal of Korean Society of Pediatric Endocrinology 2009;14(2):163-167
Slipped capital femoral epiphysis is a rare hip disorder that mainly occurs in pubertal children. Although the exact cause of this disorder is unknown, it is known to be associated with obesity, trauma, delayed sexual development, delayed bone maturation, chronic renal failure, genetic diseases, endocrine disorders (growth hormone deficiency, hypothyroidism, hypogonadism), growth hormone therapy, and gonadotropin releasing hormone agonist (GnRH agonist) therapy. We report 2 cases of slipped capital femoral epiphysis in adolescent females who were receiving growth hormone therapy. The first case is of a 16 year-old-girl with chronic renal failure and renal osteodystrophy. The second case is of an 11 year-old-girl with idiopathic precocious puberty who had received GnRH agonist and growth hormone therapy. Unilateral or bilateral slipped capital femoral epiphysis developed at 1 year 3 months after treatment in both the cases. The chief complaints were pain in the hip joint and lower extremities. Growth hormone and/or GnRH agonist therapy was stopped, and in situ screw fixations of the involved hip epiphyses were performed.
Adolescent
;
Child
;
Endocrine System Diseases
;
Epiphyses
;
Female
;
Gonadotropin-Releasing Hormone
;
Growth Hormone
;
Hip
;
Hip Joint
;
Humans
;
Hypothyroidism
;
Kidney Failure, Chronic
;
Lower Extremity
;
Obesity
;
Puberty, Precocious
;
Renal Osteodystrophy
;
Sexual Development
;
Slipped Capital Femoral Epiphyses
5.Functional Self-Expandable Metal Stents in Biliary Obstruction.
Chang Il KWON ; Kwang Hyun KO ; Ki Baik HAHM ; Dae Hwan KANG
Clinical Endoscopy 2013;46(5):515-521
Biliary stents are widely used not only for palliative treatment of malignant biliary obstruction but also for benign biliary diseases. Each plastic stent or self-expandable metal stent (SEMS) has its own advantages, and a proper stent should be selected carefully for individual condition. To compensate and overcome several drawbacks of SEMS, functional self-expandable metal stent (FSEMS) has been developed with much progress so far. This article looks into the outcomes and defects of each stent type for benign biliary stricture and describes newly introduced FSEMSs according to their functional categories.
Bile Ducts, Extrahepatic
;
Biliary Tract
;
Constriction, Pathologic
;
Drug-Eluting Stents
;
Palliative Care
;
Plastics
;
Stents
6.Reorganization of Cortical Language Areas in Patients with Aphasia: A Functional MRI Study.
Yun Hee KIM ; Myoung Hwan KO ; Todd B PARRISH ; Hyun Gi KIM
Yonsei Medical Journal 2002;43(4):441-445
The purpose of this study is to delineate the pattern of reorganization of cortical language areas using functional magnetic resonance imaging (fMRI) after rehabilitation therapy in patients with aphasia. Six right-handed aphasic patients were investigated. Causes of aphasia were intracerebral hemorrhages of the left basal ganglia in 3 patients, cerebral infarction of the left MCA in 2, and surgical resection of the frontotemporal lobes to control intractable epilepsy in 1. An auditory sentence completion task was used to activate brain language areas during the fMRI. Three patients with left frontal lesions showed activation in the right inferior frontal lobes while performing language tasks, whereas the other 3, whose lesions located at subcortical areas, showed activation in the bilateral frontal and temporal lobes. Our results demonstrated the differences in interhemispheric reorganization of the language network depending on the location of the lesion in aphasic patients. While the patients with subcortical lesion showed tendency of bilateral frontal activation, those with cortical lesion showed activation of the right frontal lobe.
Adult
;
Aphasia/*pathology/physiopathology
;
Cerebral Cortex/*pathology
;
Female
;
Human
;
*Language
;
Magnetic Resonance Imaging
;
Male
;
Middle Age
7.Effect of Donepezil on Cognitive Function in Patients with Brain Injury.
Yun Hee KIM ; Seung Hun SHIN ; Sung Hee PARK ; Myoung Hwan KO
Journal of the Korean Academy of Rehabilitation Medicine 2002;26(4):374-378
OBJECTIVE: To evaluate the effect of donepezil on cognitive function in patients with brain injury who had cognitive impairment. METHOD: Twenty one subjects with brain injury (18 males,3 females) were enrolled and classified into two groups, experimental and control group. There was no significant difference between two groups in age, postonset duration, and level of education. For the experimental group, one tablelet of Aricept(R) (5 mg of donepezil per tablet) was administered daily for 6 weeks. The baseline and follow up cognitive assessments were performed before and 6 weeks after. Mini- mental Status Examination (MMSE), Computerized Neuropsychologic Test (CNT), Judgement of Line Orientation (JLO), and visuospatial Wechsler memory test were used for the assessment of cognitive function. RESULTS: In baseline study, two groups showed no difference in their cognitive function. After 6 weeks, the experimental group showed significantly higher performance in forward digit span, verbal learning test, backward visual span, visual learning test, non-verbal Wechsler memory test, and judgement of line orientaion than control group (p<0.05). CONCLUSION: These results suggested that the administration of Aricept(R) was beneficial in improving the cognitive func tion, especially verbal and visual memory and visuospatial perception in patients with brain injury.
Brain Injuries*
;
Brain*
;
Education
;
Follow-Up Studies
;
Humans
;
Learning
;
Memory
;
Neuropsychological Tests
;
Verbal Learning
8.Molecular variants of the FSH receptor exon 10 (Thr307Ala; A919G) in premature ovarian failure (POF) women by PCR-SSCP.
Nam Keun KIM ; Sook Hwan LEE ; Yoon Sung NAM ; Tae Jong SOHN ; Sang Hee PARK ; Chan PARK ; Jung Jae KO ; Kwang Yul CHA
Korean Journal of Obstetrics and Gynecology 2000;43(7):1144-1146
OBJECTIVE: This study was performed to determine whether the FSH receptor mutation is present in infertile Korean patients with 46,XX premature ovarian failure (POF) women. METHODS: The variant of FSH receptor exon 10 in thirteen 46, XX idiopathic POF and 4 healthy fertile (control) women were studied. Missense mutation in Exon 10 was detected in POF patients and healthy fertile women by polymerase chain reaction-single stranded conformation polymorphism (PCR-SSCP). RESULTS: The variant types of FSH receptor exon 10 (Thr307Ala; A919G) were found in healthy fertile (control) and POF women. CONCLUSIONS: This mutation may not be specific in POF patients and further study is needed in fertile (control) and POF women.
Exons*
;
Female
;
Humans
;
Mutation, Missense
;
Primary Ovarian Insufficiency*
;
Receptors, FSH*
9.Unpleasant Journey from Helicobacter pylori-associated Gastritis to Gastric Cancer: Cancer Prevention by Taking a Detour.
Sang Hwan LEE ; Jong Min PARK ; Young Min HAN ; Weon Jin KO ; Ki Baik HAHM
The Korean Journal of Gastroenterology 2015;66(6):303-311
As a commensal or a pathogen, Helicobacter pylori can change the balance of a complex interaction that exists among gastric epithelial cells, microbes, and their environment. Therefore, unraveling this complex relationship of these mixtures can be expected to help prevent cancer as well as troublesome unmet medical needs of H. pylori infection. Though gastric carcinogenesis is a multi-step process, precancerous lesion can be reversible in the early phase of mucosal damage before reaching the stage of no return. However, biomarkers to predict rejuvenation of precancerous atrophic gastritis have not been identified yet and gastric cancer prevention is still regarded as an impregnable fortress. However, when we take the journey from H. pylori-associated gastritis to gastric cancer, it provides us with the clue for prevention since there are two main preventive strategies: eradication and anti-inflammation. The evidence supporting the former strategy is now ongoing in Japan through a nation-wide effort to eradicate H. pylori in patients with chronic gastritis, but suboptimal apprehension to increasing H. pylori resistance to antibiotics and patient non-compliance still exists. The latter strategy has been continued in the author's research center under siTRP (short-term intervention to revert premalignant lesion) strategy. By focusing on the role of inflammation in the development of H. pylori-associated gastric carcinogenesis, this review is intended to explain the connection between inflammation and gastric cancer. Strategies on H. pylori eradication, removal of inflammation, and reverting preneoplastic lesion will also be introduced. In the end, we expect to be able to prevent gastric cancer by take a detour from the unpleasant journey, i.e. from H. pylori-associated gastritis to gastric cancer.
Animals
;
Anti-Bacterial Agents/pharmacology/therapeutic use
;
Biomarkers/metabolism
;
Disease Models, Animal
;
Gastritis/*etiology
;
Helicobacter Infections/*complications/drug therapy
;
Helicobacter pylori/drug effects/metabolism/physiology
;
Humans
;
Stomach Neoplasms/etiology/*prevention & control
;
Virulence Factors/metabolism
10.Intramedullary Spinal Cord Metastasis of Choriocarcinoma.
Jun Kyeung KO ; Seung Heon CHA ; Jung Hwan LEE ; Chang Hwa CHOI
Journal of Korean Neurosurgical Society 2012;51(3):141-143
The authors describe a case of choriocarcinoma that metastasized to the cerebral cortex, vertebral body, and intramedullary spinal cord. A 21-year-old woman presented with sudden headache, vomiting and a visual field defect. Brain computed tomography and magnetic resonance examinations revealed an intracranial hemorrhage in the left temporo-parietal lobe and two enhancing nodules in the left temporal and right frontal lobe. After several days, the size of the hemorrhage increased, and a new hemorrhage was identified in the right frontal lobe. The hematoma and enhancing mass in the left temporo-parietal lobe were surgically removed. Choriocarcinoma was diagnosed after histological examination. At 6 days after the operation, her consciousness had worsened and she was in a state of stupor. The size of the hematoma in the right frontal lobe was enlarged. We performed an emergency operation to remove the hematoma and enhancing mass. Her mental status recovered slowly. Two months thereafter, she complained of paraplegia with sensory loss below the nipples. Whole spine magnetic resonance imaging revealed a well-enhancing mass in the thoracic intramedullary spinal cord and L2 vertebral body. Despite chemotherapy and radiotherapy, the patient died 13 months after the diagnosis.
Brain
;
Cerebral Cortex
;
Choriocarcinoma
;
Consciousness
;
Emergencies
;
Female
;
Frontal Lobe
;
Headache
;
Hematoma
;
Hemorrhage
;
Humans
;
Intracranial Hemorrhages
;
Magnetic Resonance Imaging
;
Magnetic Resonance Spectroscopy
;
Neoplasm Metastasis
;
Nipples
;
Paraplegia
;
Pregnancy
;
Spinal Cord
;
Spine
;
Stupor
;
Visual Fields
;
Vomiting
;
Young Adult