휴대인터넷 LBS 인프라 구현

이근철(Keun Cheol Lee),이지훈(Ji Hun Yi),이순호(Soon Ho Lee),박상봉(Sang Bong Park) 한국통신학회 2005 한국통신학회 학술대회 및 강연회 Vol.2005 No.12

水素에너지시스템의 未來像

李根喆(Keun-Cheol Lee) 대한전기학회 1980 전기의 세계 Vol.29 No.11

비배부 접근법을 통한 비중격 성형술

권용석,이근철,정기환,한재정,박정민,김석권,박시현,김주헌,Gwon, Yong-Seok,Lee, Keun-Cheol,Jeong, Ki-Hwan,Han, Jae-jung,Park, Jung-min,Kim, Seok-Kwun,Park, Si-Hyun,Kim, Ju-Heon 대한성형외과학회 2005 Archives of Plastic Surgery Vol.32 No.1

Septal deviations interfere with the nasal airflow and contribute to the deformities in the external appearance of the nose. An aesthetically and functionally satisfactory correction of severe septal deformities often requires temporary intraoperative removal of the septal cartilage for appropriate remodeling. This article describes septoplasty through dorsal approach for the correction of septal deviation. From March 2001 to April 2004, the author performed septoplasty through dorsal approach for the correction of septal deviations on 45 patients, of whom 22 of whom had nasal obstruction. Open rhinoplasty was used for dorsal approach in all patients and operation was performed under the general anesthesia or local anesthesia. The follow-up period of the patients ranged from 3 to 15 months with a mean of 10 months, and postoperative results were quite satisfactory. There was neither incidences of patients' complaints, nor any complications such as hematoma, septal perforation, supratip deformity, or recurrence. And there was some improvement of nasal obstruction in 15 patients. In conclusion, Septoplasty through dorsal approach is an effective method for the correction of septal deviation and improvement of the nasal airway obstruction.

남성 가성반음양 환자에서의 요도성형술

김석권,하재성,이근철,박정민,Kim, Seok Kwun,Ha, Jae Seong,Lee, Keun Cheol,Park, Jung Min 대한성형외과학회 2005 Archives of Plastic Surgery Vol.32 No.1

Male pseudohermaphroditism is individuals with Y chromosome whose external appearances fail to develop as expected as a normal male. Cytogenetic form of male pseudohermaphroditism was 46XY but external genital forms were variable. We reviewed data from 7 patients with male pseudohermaphroditism operated in Dong-A University Hospital from January 1996 to August 2002. They all had severe form of hypospadias (pseudovaginal perineoscrotal type). Only 1 of 7 cases was operated urethroplasty by one stage method, and all others by two stage method. Patients with mild chordee were operated by one stage method and patients with severe chordee were operated by two stage method. Complete chordee release was done by Z-plasty or FTSG on the first stage and posterior urethroplasty was done at level of mid-dorsum of shaft at the same time. Anterior urethroplasty was done completely on the second stage. Results were good from the viewpoint of shape and urination. Urethral fistula occurred in two cases, but other complications (infection, urethral stricture, etc.) didn't occur. In conclusion, two stage method was compatible to correct hypospadias in male pseudohermaphroditism, because hypospadias in male pseudohermaphroditism is in severe form.

Type A Botulinum Toxin이 장딴지근 퇴축에 미치는 영향

박정민,하재성,이근철,김석권,이기남,이명종,이건호,Park, Jung Min,Ha, Jae Seong,Lee, Keun Cheol,Kim, Seok Kwun,Lee, Gi Nam,Lee, Myong Jong,Lee, Kun Ho 대한성형외과학회 2005 Archives of Plastic Surgery Vol.32 No.1

Botulinum toxin type A is widely used for anti-wrinkling therapy, and correction of the square face. The toxin ultimately prevent the release of membrane-bound acetylcholine at the neuromuscular junction of striated muscles and thus produce chemical denervation and paralysis of the muscles. Our purpose of study is to know if application of botulinum toxin type A on calf reduction is effective, how much dosage is effective, and what are the possible complications. We reviewed data of 30 consecutive patients subjected to calf reduction in Dong-A University Hospital from February 2003 to April 2003. We injected normal saline 2cc on both calves region in 15 control group patients, and the other patients was divided 3 group. Group 1, Group 2, Group 3 was injected 50U, 100U, 150U botulinum toxin A on each calf region and followed up for 6 month. Maximal circumference of calf was not changed in the control group but an average of 0.7 cm reduction was noted in group 1, average 1.34 cm(right calf) and 1.26cm(left calf) in group 2, average 1.44cm(right calf) and 1.58cm(left calf) in group 3. Maximal area of calf was not changed in the control group but average reduction of 12.5%(right calf) and 12.7%(left calf) was obtained in group 1, average 19.4% (right calf) and 19.9%(left calf) in group 2, average 24.8%(right calf) and 21.07%(left calf) in group 3, as measured on CAT scan. Total fat amount and fat amount in the lower extremity was no change in all the groups, but lean body mass was decreased average 1.27%(right calf) and 1.15%(left calf) in group 1, average 3.47%(right calf) and 2.98%(left calf) in group 2, average 3.58%(right calf) and 3.95%(left calf) in group 3. Photography of the preoperative and postoperative 6 month state revealed higher satisfaction in Group 2, 3 compared to Group 1. Use of botulinum toxin type A in calf reduction is a very simple, safe, non-invasive method and effective in terms of calf contouring rather than reduction of calf circumference.

Limited Dissection Face Lift with PDS Quilting Suture

김석권,김명훈,권용석,이근철,Kim, Seok-Kwun,Kim, Myung-Hoon,Kwon, Yong-Seok,Lee, Keun-Cheol Korean Society of Plastic and Reconstructive Surge 2010 Archives of Plastic Surgery Vol.37 No.6

Purpose: Facial rejuvenating surgery has become a challenge to most plastic surgeons. Patients are demanding fewer complications, a prompt recovery, and more natural results. Current trend of the face lift surgery has been developed into less invasive procedures. Every aging patient in Asia wants to look younger without obvious evidence of surgical correction. Methods: The authors performed the limited dissection face lift with PDS quilting suture on twenty five patients. These five quilting sutures consist of sutures at 1~2 cm posterior to the prominent point of zygoma to the periosteum of the zygomatic arch, at the lateral border of Bichat's fat pad area to the zygomatic arch, at the lateral border of the orbicularis oculi muscle to the deep temporal fascia, at the upper lateral border of the platysma to the periosteum of the mastoid, and at the anterior lower margin of the earlobe to the deep temporal fascia by quilting suture technique to achieve rejuvenation. Results: These procedures could produce a balanced volumetric rejuvenation. This method gave considerable benefit of stable and satisfactory results. It provides reduced operative time, well corrected nasolabial fold and neck wrinkle, and swift recovery with minimal complications. Conclusion: Although it could not replace the classic facelift, this technique can be recommended as an option for patients who do not present with advanced facial aging or not want a more extensive procedure.

뮬리켄법을 이용한 일측성 및 양측성 구순열 환자의 수술: 10년 후의 결과

김석권,김태헌,박수성,이근철,Kim, Seok-Kwun,Kim, Tae-Heon,Park, Su-Sung,Lee, Keun-Cheol 대한두개안면성형외과학회 2012 Archives of Craniofacial Surgery Vol.13 No.1

Purpose: Mulliken's method allows for normal nasal and lip growth, which in turn forms a natural shape of the philtrum. Therefore, we used a modified Mulliken's method to correct unilateral and bilateral cleft lip nasal deformities and followed the patients for 10 years. Methods: Ninety-one patients, who had undergone repair of unilateral and bilateral cleft lip and nasal deformity simultaneously using Mulliken's method during the time period from June 1997 to June 2009, were enrolled into this study. To follow-up of the growth of the lips and nose after the operation, the following 5 anthropometric measurements were analyzed: nasal tip protrusion, columellar length, upper lip height, cutaneous lip height, and vermilion mucosa height. Results: Using this method, we obtained a result that there was no significant difference in the development of the lip compared to the normal control group, and that the bilateral cleft lip patients' nasal projection and columellar length was shorter than that in normal persons. Both measures were statistically significant. Conclusion: Mulliken's method is a superb surgical technique, which enables the normal development of the nose and lip, which further allows for the innate philtrum appearance. The author's result does not seem to be meaningful, because the normal rate of nasal growth is slow before adolescence; however, we recommend additional follow-up and accordant treatment, if needed, once the nasal growth is complete.

두개골 조기유합증 환자의 술후 CT Scan을 이용한 두개강내 용적의 평가

김석권,이장호,한재정,정기환,이근철,박정민,Kim, Seok Kwun,Lee, Jang Ho,Han, Jae Jung,Jung, Ki Hwan,Lee, Keun Cheol,Park, Jung Min 대한성형외과학회 2005 Archives of Plastic Surgery Vol.32 No.1

Craniosynostosis is the premature fusion of one or more sutures of either cranial vault or base. Fused sutures may impede normal growth of the calvaria, leading to characteristic skull deformities; Morphological craniosynostosis is classified descriptively. Being craniosynostosis uncorrected the deformity progresses continuously and causes an increase of intracranial pressure. The surgical involvement aims at the expansion of intracranial space as well as satisfactory achievement of craniofacial shape. Early surgical correction in infancy prevents the deformity from the further progression and possible associated complication of high intracranial pressure. A long period of follow-up is essential to asses the outcome of an effectiveness of the surgery. measurement of intracranial volume has been concerned in medical personnel and anthropologists for many years. A reliable and accurate measurements of the intracranial volume facilitates to make a diagnosis and treatment of craniosynostosis. Pre-and postoperative change of intracranial volume was evaluated with 3D CT scanning in 12 cases of craniosynostosis who underwent frontal advancement and total cranial vault remodeling. Increased intracranial volume is attributed to surgical release of craniosynostosis and natural growth. We conceive that the intracranial volume is significantly increased after surgical correction of fused cranial sutures and along with natural growing. A procedure of frontal advancement and total cranial vault remodeling is very useful to correct such a deformity as craniosynostosis. And also 2 cases out of five mentally retarded patients improved remarkably and Forehead retrusion or temporal depression followed in another two cases.

The Anti-Inflammatory Effect of Pegmatite by in Vivo and in Vitro Study

이민혁,김석권,권용석,이장호,이근철,Lee, Min-Hyuk,Kim, Seok-Kwun,Kwon, Yong-Seok,Lee, Jang-Ho,Lee, Keun-Cheol Korean Society of Plastic and Reconstructive Surge 2010 Archives of Plastic Surgery Vol.37 No.1

Purpose: This work aimed to elucidate the anti-inflammatory effect of pegmatite in vitro and in vivo. Methods: Author evaluated the suppressive effects of pegmatite on lipopolysaccharide (LPS)-stimulated nitric oxide (NO) production, TNF-${\alpha}$ and IL-6 release in the RAW 264.7 murinemacrophages. Results: Treatment of RAW 264.7 cells with pegmatite significantly reduced LPS-stimulated NO production and inflammatory cytokine such as TNF-${\alpha}$ and IL-6 secretion in a concentration-dependent manner. Also pegmatite showed topical anti-inflammatory activity in the arachidonic acid (AA)-induced ear edema and acetic acid-induced increase in capillary permeability assessment in mice. It was also found that pegmatite (10 mg per ear in DW) inhibited arachidonic acid induced edema at 24 h more profoundly than 1 h by topical application. Furthermore, the vascular permeability increase induced by acetic acid was significantly reduced in mice that received pegmatite in 50 mg per mouse. Conclusion: Therefore the results of the present study suggest that pegmatite is a potent inhibitor of the LPS-induced NO and inflammatory cytokine in RAW 264.7 macrophages and showed anti-inflammatory activities in vivo animal model.

Audio 回路의 雜音解析과 시뮬레이숀

車均鉉(Kyun-Hyon Tchah),李根喆(Keun-Cheol Lee) 대한전기학회 1980 전기의 세계 Vol.29 No.12