• Journal of Korean Foot and Ankle Society
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• v.18 no.4
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• pp.183-188
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• 2014

Purpose: The accepted general management principle after ankle arthrodesis is to maintain non-weight bearing for 6 to 8 weeks. The aim of this study was to report clinical outcome of patients allowed early weight bearing after arthroscopic arthrodesis. Materials and Methods: We analyzed medical records and radiographs to determine fusion rate and complication risk of 22 sequential patients allowed to walk under short leg cast within 3 days after arthroscopic ankle arthrodesis using 2 screws from January 2008 to June 2012. The minimum follow-up period was 18 months, and the mean age of the patients was 67 years. Results: The mean visual analog scale was decreased from 8.9 points preoperatively to 2.3 points after 12 months. Complete ankle fusion was achieved in 19 patients (86.4%) at 3-month follow-up. There were 2 cases of delayed union and one case of nonunion at 12-month follow-up. There was no other complication such as wound problem, persistent swelling of the ankle. Conclusion: Bony union may not be interfered even though patients were allowed to walk under cast within a few days after arthroscopic ankle arthrodesis.

• Journal of Korean Foot and Ankle Society
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• v.17 no.4
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• pp.294-301
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• 2013

Purpose: To report the clinical outcomes and complications of flexor hallucis longus (FHL) tendoscopy using 3 portals. Materials and Methods: Between January 2012 and April 2013, 10 patients (10 ankles) received tendoscopic surgery for the treatment of FHL tenosynovitis. Patients complaining of pain and tenderness along the course of FHL despite over 6 months of conservative treatments were indicated for surgery. The mean age was 41.7 years (range: 18-57) and the follow up period was 12.7 months (range: 6-20). Tendoscopy was performed using posteromedial, posterolateral, and plantar portals. Clinical evaluations included preoperative and postoperative visual analogue scale (VAS), American orthopaedic foot and ankle society (AOFAS) score, and patients' satisfaction. Results: Tendoscopic findings included tenosynovitis in 10 cases, degenerated vinculae in 6 cases, stenosis of the tendon at its entrance into the fibro-osseous tunnel in 5 cases, and degenerative partial tendon tear in 3 cases. Two cases had associated symptomatic os trigonum and 3 cases had posterior ankle impingement syndrome. Preoperative pain decreased from median VAS 6 (range: 4-10) to 2.1 (range: 1-5) at the last follow up and AOFAS score improved from 50.1 (range: 36-63) to 82.1 (range: 61-89) (p<0.05). Nine patients were satisfied or very satisfied with the outcome. Injury of the lateral plantar nerve occurred in one case. Conclusion: FHL tendoscopy using 3 portals is a feasible and useful minimal invasive surgical technique for the management of FHL tenosynovitis.

• The Korean Journal of Pain
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• v.7 no.1
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• pp.74-77
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• 1994

Since its introduction, low level lasers have been utilized in many varied clinical applications for the treatment of musculoskeletal and body surface lesions. Due to the laser beams specific characteristic-coherence, monochromaticity and unidirectionality, without adverse reaction with neighbouring tissue, physicians have used it with relative ease. We observed accelerating effects of healing process of some intractable skin wound, improvement of graft survival, as well as reduction of pain on ulcerating tissues, by treating twice weekly with low level Helium-Neon(He-Ne) and Infrared(IR) laser. The laser's energy density was set at $1\;J/cm^2$ and a fixed frequency of 600 Hz by continuous scanning. Irradiating time was calculated according to the cross diameter of the wound. Further clinical work will be required to evaluate the accelerated healing processes by biostimulating mechanisms of laser ray, especially for the intractable(diabetic) skin ulceration.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.11a
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• pp.145-146
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• 2007

Dye-Sensitized Solar Cell Solar cells(DSSC) were appeared for overcoming global environmental problems and lack of fossil fuel problems. And it is one of study field that is getting into the spotlight lately because manufacturing method is more simple and inexpensive than existing silicon solar cells. Oxide semiconductor is used for adsorption of dye and electron transfer in DSSC study, and $TiO_2$ is used most usually. Overall light conversion efficiency is changed by several elements such as $TiO_2$ particle size and structure, pore size and shape. In this study, we report the solar cell performance of titania$(TiO_2)$ film electrodes with various particle sizes. $TiO_2$ particle size was 16 nm, 25 nm, and mixture of 16nm and 25 nm, and manufactured using Doctor blade method. When applied each $TiO_2$ film to DSSC, the best efficiency was found at 16nm of $TiO_2$ particle. 16nm of $TiO_2$ particle has the highest efficiency compared to the others, because particles with smaller diameters would adsorb more dye due to larger surface area. And in case of the mixture of 16nm and 25 nm, the surface area was smaller than expected. It is estimated that double layer is adsorbed a large amount of chemisorbed dye and improved light scattering leading due to efficiency concentration light than mono layer.

• The Journal of Korean Obstetrics and Gynecology
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• v.24 no.1
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• pp.144-161
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• 2011

Objectives: Oriental Medicine has thousands years of history. But this era, every medical decision should be based on scientific evidence, that is evidence-based medicine (EBM). This study is to suggest quantitative case report form for dysmenorrhea that can be easily used in clinics. Methods: First, to search published papers in Korea and overseas, OASIS, KISS and NCBI(pubmed) database. Second, to search clinical trials in clinical trial register website, ISRCTN and clinicaltrials.gov. Result: Visual Analogue Scale(VAS) is the most commonly used scale. Conclusion: The main scales for dysmenorrhea are Visual Analogue Scale(VAS), Multidimensional verbal Rating scale(MVRS), pain-killer intake amount and restriction of daily life activities. To measure the effect of herbal medicine, more than 2 menstrual cycle is recommended.

• Journal of Chest Surgery
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• v.33 no.12
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• pp.963-967
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• 2000

정상심실중격의 폐동맥협착은 흔한 선천성 심장질환이지만 신생아기에 심한 증세를 보이는 위기적 폐동맥 협착은 드물며 예후도 대단히 나쁘다. 경피적 풍선 판막성형술의 발달과 함께 폐동맥협착의 외과적 치료는 더욱 줄어드는 추세이다. 본 증례는 정상심실중격의 위기적 폐동맥협착증으로 진단받은 생후 2일된 남자 신생아로 심한 청색증과 저산소증을 보여 응급실로 내원하였다. 환아는 산소공급 및 Prostaglandin E$_1$을 투여 후 동맥혈 산소 분압이 19 mmHg에서 54mmHg로 증가하였다. 경피적 풍선 판막성형술을 시도하였으나 유도도관(Guide wire)이 판막의 개구부를 통과하지 못하였고 시술도중 심낭내로 조영제가 고이는 소견을 보여 우심실 천공이 의심되었으므로 응급으로 정상체온의 체외순환하에서 폐동맥 절개후 폐동맥 판막절개술을 시행하였다. 수술 후 중환자실에서의 수술경과는 양호하였고 현재 수술 6개월째 외래 추적관찰중이다.

• Journal of Welding and Joining
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• v.27 no.6
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• pp.68-73
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• 2009

Recently, as titanium and titanium alloys are being increasingly used in wide areas, there are on-going researches to obtain high quality weld zone. In particular, growing interest is being drawn to laser welding, which involves low heat input and large aspect ratio in various welding processes and can facilitate shield in atmospheric condition compared with electron beam welding. The first report covered the analysis of embrittlement by the bead color of weld zone through quantitative analysis of oxygen and nitrogen and measurement of hardness as basic experiment to apply laser welding to titanium. Results indicated that the element that affect embrittlement the most was nitrogen, and as embrittlement and oxygenation go on, bead color changed to silver, gold, brown, blue and gray. This study performed butt welding of pure titanium and STS304 by using 1kW CW Nd:YAG laser, and to find out basic physical properties, evaluated welding performance by laser output, welding speed, root gap and misalignment etc, and examined mechanical properties through tensile stress and Erichsen test. The reason particles of pure titanium welded metal and HAZ are greater than STS304 is because they are pure metal and do not include many impure elements that work as nuclei in case of resolidification, thus becoming coarse columnar crystals eventually. In addition, the reason STS304 requires more energy during welding than pure titanium is because the particle size of base metal is smaller.

• The Journal of Internal Korean Medicine
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• v.37 no.4
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• pp.661-668
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• 2016

Objectives: To describe the effect of traditional Korean medicine and treatment on Miller Fisher syndrome (MFS).Methods: A 54-year-old woman diagnosed with MFS presented with eyeball dysfunction, diplopia, vertigo, right facial palsy, and back dysesthesia. The patient had been treated with immunoglobulin for 21 d, but her symptoms failed to improve. Thus, herbal medicine, acupuncture, electropuncture, pharmacopuncture, and moxibustion were added. Length of eyeball movement, distance that the patient recognize double images in the eyes and Visual Analogue Scale (VAS) are measures for the syndrome.Results: The symptoms of the patient considerably improved, with the return of eyeball movement to normal and disappearance of diplopia.Conclusions: The results suggest that Korean medicine may be an effective therapy for MFS.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.5
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• pp.1350-1354
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• 2006

The purpose of this study is to refort the effect of oriental demonstration treatments for the incontinence of urine and stool by cerebrovascular disease. He was treated with herbal medication, acupunture, moxibustion and physical therapy. Through oriental demonstration treatments, Improvement in incontinence of urine and stool by cerebrovascular disease, therefore reported here. The study suggests that therapeutic value of oriental demonstration treatments for the incontinence of urine and stool by cerebrovascular disease will De higher if more clinical studies and researching more cases are accomplished.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup1
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• pp.165-169
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• 2001

Apatient, 51 years old woman, had suffered form headache and decrease of visual acuity. She had $3{\times}3cm$ sized giant aneurysm originated in cavernous and clinoid portion of left ICA(C4,C5) in the cerebral angiography. Before craniotomy, left CCA was exposed and 6F double lumen catheter was inserted in left ICA through the sheath. Pre-operative angiography was done. balloon catheter was positioned at the petrous portion of ICA. Eyebrow approach was done and giant aneurysm was exposed. The proximal blood flow was controlled with balloon dilatation and suction and decompression was tried, then multiple clips were applied. The loss of distal blood flow under intra-operative angiography was notified after clipping. The position of clips were repositioned to preserve blood flow & the rich flow was confirmed at distal part of clipping. In the post-operative cerebral angiography, the same finding was shown.