증후성 설상골 주위 부골: 증례 보고

우승훈,신원철,Woo, Seung Hun,Shin, Won Chul 대한족부족관절학회 2021 대한족부족관절학회지 Vol.25 No.2

An extremely rare accessory bone of the foot located in the distal portion of the navicular that articulates with the medial cuneiform was observed. Os paracuneiforme is usually located medial to the medial cuneiform or the naviculocuneiform joint. Although os paracuneiforme is often referred to as an accessory bone around the foot, few cases of this type of accessory bone have been reported. This paper reports a patient with a painful Os paracuneiform who underwent surgical excision of the accessory bone.

후두의 말초 운동신경 지배

우승훈,김진평,Woo, Seung-Hoon,Kim, Jin-Pyeong 대한후두음성언어의학회 2009 대한후두음성언어의학회지 Vol.20 No.2

The laryngeal peripheral nerve system is presented on the basis of our results in the animal. This present paper forcused on the localization of each laryngeal motoneuron, the myotopical arrangements of motoneurons innervating the pharyngeal and esophageal striated muscles whitin the nucleus ambiguous in the motor nerve supply, and the pathway to the larynx in the sensory and symphathetic nerve supplies. Regarding the parasympathetic nerve supply, the neural ganglia and the ganglionic cells in and around the laryngeal nerves and in the laryngeal framework are demonstrated. Most of this innervations, however, is still unclear. In addition, we presented about external branch of superior laryngeal nerve and inferior laryngeal nerve. Discuss from the literature are also reported.

Photodynamic therapy for SNU-80 anaplastic thyroid cancer cells

우승훈,Kun-Woo Kim,Phil-Sang Chung,이상준 대한의학레이저학회 2022 MEDICAL LASERS Vol.11 No.2

Background and ObjectivesAnaplastic thyroid carcinoma (ATC) is one of the lethal human neo-plasms. Photodynamic therapy (PDT) is based on the interaction of a photosensitizer and light with a specific wavelength, and induces destruction of cancer cells. The purpose of this study is to evaluate the effect of the PDT with photofrin on SNU-80 anaplastic thyroid cancer cells.Materials and MethodsAfter PDT, cell viability was measured by MTT assay. The experiments were done at photofrin concentration of 1.6 to 3.2 μg/ml. Subcellular localization of photofrin were observed by ER-TrackerTM and Mito-Tracker®. Hoechst and propidium iodide (PI) double stained cells were analyzed to measure the cellular apoptosis and necrosis using confocal microscope at 4, 8, and 24 hours after laser irradiation. Caspase activation was measured by western blot analysis.ResultsCytotoxicity was increased accordingly to increasing photofrin concen-tration in MTT assay. The photofrin was localized at cytoplasm and mitochondria inside SNU-80 cells. Apoptosis and necrosis cells were increased on confocal microscope, as time after irradiation was progressed. The expression of caspase-3, -9 and poly (ADP-ribose) polymerase (PARP) were detected by Western blot analysis indicating that Photoprin-PDT showed cytotoxicity to anaplastic thyroid cancer cells in dose-dependent pattern.ConclusionPhotofrin-PDT led to in vitro cell death of SNU-80 cells through mito-chondrial mediated apoptosis. PDT could be used as a part of multimodal treatment for ATC.

외측 발목 불안정성을 치료하지 않으면 어떻게 되는가

우승훈,정형진,Woo, Seung Hun,Chung, Hyung-Jin 대한족부족관절학회 2021 대한족부족관절학회지 Vol.25 No.1

The term chronic lateral ankle instability (CLAI) embraces a spectrum of conditions that involve functional and mechanical instability, both in athletes and lower-demand patients. The hallmarks of CLAI are recurrent sprains, persistent pain, and repeated episodes of the ankle giving way. CLAI is the main complication of acute ankle sprains, which can cause discomfort in daily and sports activity. Approximately 10% to 30% of patients with acute ligament ruptures will develop chronic instability over the course of a year from the index injury. An accurate diagnostic approach and successful treatment plan should be established based on a comprehensive understanding of the concept of functional and mechanical instability. Unfortunately, the optimal modality for the management of CLAI is unclear. Even after conservative treatment or surgical intervention, it could result in degenerative changes to the ankle joint in the long term. Thus far, the incidence of ligamentous posttraumatic ankle osteoarthritis was reported to be 13% to 78%. The mean latency time between injury and osteoarthritis was at least 10 to 34.3 years. CLAI is an important pathological condition that can cause discomfort or dysfunction in daily activity in the short term, resulting in joint destruction in the long term. Therefore, it is important to understand the various complications that can occur when CLAI is not treated properly.

윤리적인 문제: 누가 신경모니터링을 해야하는가?

우승훈(Seung Hoon Woo) 대한신경모니터링학회 2022 Journal of Neuromonitoring & Neurophysiology Vol.2 No.1

Legal and ethical guidelines direct health care professionals to perform their duties in a manner acceptable to society. Intraoperative neuromonitoring (IONM) is not a prerequisite for registration, such as permission and certification. Because patients receiving IONM are particularly vulnerable and need additional protection, it is important to explore the ethical and legal aspects of these practices. Therefore, we would like to examine the ethical aspects of neuromonitoring.

불안정성 대퇴골 전자간 골절에 대한 제2형 항회전 근위 대퇴 골수정 내고정술의 치료 결과

우승훈(Seung Hun Woo),이상민(Sang Min Lee),신원철(Won Chul Shin),서근택(Kuen Tak Suh) 대한정형외과학회 2015 대한정형외과학회지 Vol.50 No.4

목적: 불안정성 대퇴골 전자간 골절로 제2형 항회전 근위 대퇴 골수정으로 수술을 시행했던 환자들을 대상으로 그 결과를 보고하고자 한다. 대상 및 방법: 2009년 8월부터 2013년 12월까지 불안정성 골절로 진단되어 제2형 항회전 근위 대퇴 골수정 내고정술을 시행한 뒤 1년 이상 추시가 가능하였던 환자 108예를 대상으로 하였다. 평균 추시 기간은 15.2개월이었다. 방사선 사진에서 골절 정복 상태, 나선 칼날의 활강 정도, 골유합 및 합병증 등을 조사하였다. 임상적으로 최종 추시 시 통증 및 보행 정도, 일상 생활 능력의 회복 등에 대한 평가를 시행하였다. 결과: 전 예에서 good 또는 acceptable한 정복 상태를 얻었다. 평균 나선 칼날의 활강은 4.1 mm였으며 골유합까지 평균 4.8개월이 소요되었다. 골수정 파손 1예, 불유합 1예로 총 2예의 합병증이 관찰되었다. Charnley 동통 점수는 평균 5.1점이었으며, 술 후 74.1% 에서 술 전 보행 능력을 회복하였다. 수상 전 일상 생활 능력을 회복한 경우는 60.2%였다. 결론: 제2형 항회전 근위 대퇴 골수정은 불안정성 대퇴골 전자간 골절의 치료에 있어서 만족할 만한 결과를 보였으나 술 후 보행 능력의 감소 및 일상 생활로의 늦은 복귀를 초래할 수 있어 이에 대한 추가적인 연구가 필요할 것으로 생각된다. Purpose: The purpose of this study was to evaluate radiologic and functional outcomes of patients with unstable femoral intertrochanteric fractures treated with proximal femoral nail antirotation II (PFNA II). Materials and Methods: Between August 2009 and December 2013, 108 hips (108 patients) with unstable femoral intertrochanteric fractures were treated with PFNA II and followed for at least 1 year. The mean follow-up period was 15.2 months. The radiographic outcomes, reduction state, sliding distance of the helical blade, bone union, and complications were assessed. The functional outcomes were assessed according to the Charnley hip pain scoring system, walking ability, and the Activities of Daily Living index. Results: The postoperative radiograph showed a good or acceptable reduction in all cases. The mean sliding length of the blade was 4.1 mm. The mean duration of radiologic bone union was 4.8 months. There were 2 postoperative complications including nail breakage and nonunion. The mean Charnley hip pain score was 5.1 points. Preoperative walking ability was restored for 74.1% of patients. Preoperative activities of daily life were restored for 60.2% of patients. Conclusion: PFNA II used for treatment of unstable intertrochanteric fracture showed favorable outcomes. However, due to decreasing walking ability and delayed return to the activities of daily living, further studies are needed, focusing on functional recovery and rehabilitation to improve postoperative clinical outcomes.

차륜 속도만을 이용한 반 능동 현가장치의 제어기 설계

우승훈(S.H. Woo),류제하(J.H. RYU) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1

This paper presents a new simple algorithm for a semi-active suspension system control. This control algorithm utilizes only vertical wheel velocity instead of vertical body velocity and relative velocity between body and wheel that are required for conventional semi-active controller based on Skyhook theory. A theoretical explanation on the basic idea of new algorithm is made in terms of basic suspension isolation characteristics and in comparison with the Sky-hook algorithm. A quarter car dynamic model with two degrees-of-freedom is simulated to demonstrate the effectiveness of the proposed algorithm. Ride quality in term of the 1/3 octave band RMS acceleration of the sprung mass is compared with specification by the IS02631 and RMS tire deflection and RMS suspension travel are compared with those of Sky-hook algorithm and passive suspension system.

Sanders 4형 종골 골절에 대한 관혈적 정복술 및 내고정술과 일차성 거골하 관절 유합술의 치료 결과 비교

우승훈 (Seung Hun Woo),정형진(Hyung-Jin Chung),배서영(Su-Young Bae),김순규(Sun-Kyu Kim) 대한정형외과학회 2017 대한정형외과학회지 Vol.52 No.1

목적: Sanders 4형 관절내 종골 골절에 대한 관혈적 정복술 및 내고정술과 일차성 거골하 관절 유합술의 임상적 결과를 분석하고자 하였다. 대상 및 방법: 2003년 3월부터 2013년 11월까지 Sanders 4형 종골 골절로 진단되어 관혈적 정복술 및 내고정술을 시행한 11예와 일차성 거골하 관절 유합술을 시행한 11예를 비교 분석하였다. 평균 추시 기간은 34.6개월(18-72개월)이었다. 술 후 6, 12개월 및 최종 추시 시 American Orthopedic Foot and Ankle Society’s ankle-hindfoot scale (AOFAS) 점수 및 visual analogue scale pain (VAS) 통증 점수를 측정하였고 환자 만족도, 직장 복귀 여부 및 술 후 합병증을 조사하였다. 결과: 최종 추시 시 AOFAS 점수 및 VAS 점수는 양 군 간 의미 있는 차이는 보이지 않았으나(p>0.05) 일차성 거골하 관절 유합술을 시행한 군에서 환자의 만족도가 높았다(p=0.008). 관혈적 정복술군에서 증상을 동반한 거골하 관절염으로 이차성 거골하 관절 유합술을 5예(45.5%)에서 시행하였다. 결론: 양 군 간 임상적으로 의미 있는 결과의 차이는 보이지 않았으나 일차성 거골하 관절 유합술이 술 후 만족도가 높아 빠른 일상 복귀를 필요로 하는 환자 혹은 2차 수술이 불가피할 것으로 예상되는 경우 일차성 거골하 관절 유합술을 고려해 볼 수 있을 것으로 생각된다. Purpose: To compare clinical outcome of Sanders type IV intra-articular calcaneal fracture treated with open reduction and internal fixation (ORIF) versus ORIF and primary subtalar arthrodesis (PSTA). Materials and Methods: Between March 2003 and November 2013, 22 patients with 22 Sanders type 4 intra-articular calcaneal fractures were included in this study. Of these, 11 were treated with ORIF (ORIF group), and 11 were treated with ORIF and PSTA (PSTA group). The mean follow-up period was 34.6 months (range, 18–72 months). Clinical outcomes were assessed along with the American Orthopedic Foot and Ankle Society’s ankle-hindfoot scale (AOFAS score), and the visual analogue scale pain score (VAS score) at 6-month, 12-month, and last follow-up. Patient satisfaction, return to previous occupation and postoperative complications were also investigated. Results: The results for ORIF did not differ from those for PSTA based on the last follow-up AOFAS scores or the VAS scores (p>0.05). However, patient satisfaction was significantly higher in the PSTA group (p=0.008). Secondary subtalar arthrodesis was conducted in five patients (45.5%) of the ORIF group within 2 years postoperatively. Conclusion: We were unable to demonstrate a significant difference in clinical outcomes between ORIF and PSTA; however, the patient satisfaction was higher in the PSTA group. PSTA may be a suitable choice for patients who need fast recovery to daily activity and to prevent the need for secondary subtalar arthrodesis.

수술 중 신경 모니터링에 대한 사전 동의

우승훈(Seung Hoon Woo) 대한신경모니터링학회 2022 Journal of Neuromonitoring & Neurophysiology Vol.2 No.2

Over the past decade, the use of intraoperative neuro monitoring (IONM) in thyroid surgery has been widely accepted by surgeons as a useful technique for improving laryngeal neurological identification and speech results, promoting neurophysiological research, educating and training surgeons. Providing patients with information about IONM is a good practice to promote the efficient use of IONM resources and is essential for effective joint decision making between patients and surgeons. The preoperative plan and patient consent process are important for all patients who undergo thyroid surgery. The purpose of this paper is to summarize general and specific considerations, along with pre-consent criteria for using IONM to support surgeons and patients during prethyroid surgery and shared decision making processes.

반능동 현가장치의 접지 특성 향상을 위한 이중 스카이훅 알고리즘 개발

우승훈(S. H. Woo),류제하(J. Ryu) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.1