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Pulsed Radiofrequency Neuromodulation for the Treatment of Saphenous Neuralgia
Han, Bo Ram,Choi, Hyuk Jai,Kim, Min Ki,Cho, Yong-Jun The Korean Neurosurgical Society 2013 Journal of Korean neurosurgical society Vol.54 No.2
A 65-year-old male presented with pain in his right medial calf. An imaging study revealed no acute lesions, and a diagnosis of saphenous neuralgia was made by a nerve conduction study. He received temporary pain relief with saphenous nerve blocks twice in a one-week interval. Pulsed radiofrequency neuromodulation reduced pain to 10% of the maximal pain intensity. At 6 months after the procedure, the pain intensity was not aggravated even without medication. Pulsed radiofrequency neuromodulation of the saphenous nerve may offer an effective and minimally invasive treatment for patients with saphenous neuralgia who are refractory to conservative management.
Han, Bo Ram,Cho, Yong Jun,Yang, Jin Seo,Kang, Suk Hyung,Choi, Hyuk Jai The Korean Neurosurgical Society 2014 Journal of Korean neurosurgical society Vol.55 No.3
Objective : Posture-induced radial neuropathy, known as Saturday night palsy, occurs because of compression of the radial nerve. The clinical symptoms of radial neuropathy are similar to stroke or a herniated cervical disk, which makes it difficult to diagnose and sometimes leads to inappropriate evaluations. The purpose of our study was to establish the clinical characteristics and diagnostic assessment of compressive radial neuropathy. Methods : Retrospectively, we reviewed neurophysiologic studies on 25 patients diagnosed with radial nerve palsy, who experienced wrist drop after maintaining a certain posture for an extended period. The neurologic presentations, clinical prognosis, and electrophysiology of the patients were obtained from medical records. Results : Subjects were 19 males and 6 females. The median age at diagnosis was 46 years. The right arm was affected in 13 patients and the left arm in 12 patients. The condition was induced by sleeping with the arms hanging over the armrest of a chair because of drunkenness, sleeping while bending the arm under the pillow, during drinking, and unknown. The most common clinical presentation was a wrist drop and paresthesia on the dorsum of the 1st to 3rd fingers. Improvement began after a mean of 2.4 weeks. Electrophysiologic evaluation was performed after 2 weeks that revealed delayed nerve conduction velocity in all patients. Conclusion : Wrist drop is an entrapment syndrome that has a good prognosis within several weeks. Awareness of its clinical characteristics and diagnostic assessment methods may help clinicians make diagnosis of radial neuropathy and exclude irrelevant evaluations.
Emerging Variant Glioma: Glioblastoma with a Primitive Neuro-Ectodermal Tumor(PNET) Component
Han Bo Ram,최혁재,양진서,Kang Sukhyung,Cho Yong Jun,Choi Kyung Chan 대한말초신경학회 2015 The Nerve Vol.1 No.1
A 81-year old male with multiple mass lesion of the right fronto-temporo-parietal lobe and right frontal lobe was admitted to our hospital due to hemiparesis. Neuroimaging studies showed ring-enhancing lesions in right fronto-temporo-parietal lobe and right frontal lobe on magnetic resonance imaging (MRI). Tumor tissue evaluated to be consistent with glioblastoma radiologically was subjected to total excision. Using a morphological and immunophenotypic approach, the predominant component of the tumor was found to bear the properties of classic glioblastoma. The other component was composed of undifferentiated areas that exhibiting small cell morphology and diffuse neuronal immunophenotype. The case was diagnosed as ‘Glioblastoma with primitive neuroectodermal tumor (PNET) component’. The patient who had been performed postoperative radiotherapy, showed shrinkage of non-operative lesion and no sign of recurrence and neurological deficit during 12 months follow-up. We report a rare case of glioblastoma with a PNET component that has a relatively favorable outcome following surgery with radiotherapy and then review previous reports.
CaO-SiO2-Al2O3-MgO계 슬래그 중 Cu와 Ni의 용해도
한보람 ( Bo Ram Han ),손인준 ( In Joon Son ),손호상 ( Ho Sang Sohn ) 대한금속재료학회(구 대한금속학회) 2015 대한금속·재료학회지 Vol.53 No.11
In this study, the solubility of Cu and Ni, which are the main metal components of waste PCB in a CaO-SiO2-Al2O3-MgO slag system, was investigated by the chemical equilibration technique in the temperature range 1673-1823 K, under a CO-CO2 atmosphere. The concentrations of Cu and Ni in the slag increased with increasing oxygen partial pressure and MgO content in the slag. The concentrations of Cu and Ni in the slag decreased with increasing temperature. The concentration of Cu in the slag decreased with increasing activity of CaO, but that of Ni increased. The dissolution mechanisms of Cu and Ni in the CaO-SiO2-Al2O3-MgO slag could be described by the following equations from the effect of oxygen partial pressure and slag basicity on Cu and Ni dissolution behaviors: From the results obtained, the enthalpy changes from dissolution of Cu into the CaO-SiO2-Al2O3-MgO slag were calculated to be -59.17 kJ/mol, and that for Ni was calculated to be -78.89 kJ/mol.
듣기 전 활동이 예비 대학생들의 영어 듣기 이해와 정의적 요인에 미치는 영향
한보람(Han, Bo-Ram),이은주(Lee, Eun-Joo) 팬코리아영어교육학회(구 영남영어교육학회) 2013 영어교육연구 Vol.25 No.3
The study investigates the effects of different types of pre-listening activities on listening comprehension and the affective factors of pre-university students in Korea. A total of 120 pre-university students were divided into two experimental groups and a control group. The experimental groups worked on the pre-listening activities--the topic discussion activity as a complement to the top-down processing and the vocabulary instruction activity as a complement to the bottom-up processing. The control group did not do any pre-listening activities. The students were also divided into two different proficiency-level groups, i.e., a high-proficiency and a low-proficiency level, to examine the correlation between pre-listening activity types and listening proficiency. The results of the study proved that use of pre-listening activities had a significant positive effect on learners' listening comprehension. It suggests that activating learners' schema helps the learners to predict the content and supplement their lack of prior knowledge. In addition, learners showed positive responses to the listening classes using pre-listening activities, i.e., most of the learners participated in the pre-listening activities responded that the pre-listening activities boost their motivation and interests to listening comprehension.