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Optimization of Acetabular Cup Abduction by Adjusting Pelvic Pitch
Jung-Wee Park,Jae-Hyun Park,Hong Seok Kim,Lee Young-Kyun,Kye-Young Han,Yong-Chan Ha,Kyung-Hoi Koo 대한정형외과학회 2024 Clinics in Orthopedic Surgery Vol.16 No.1
Background: The purposes of this study were to determine the accuracy of our cup positioning method and to evaluate the dislocation rate after total hip arthroplasty (THA). Methods: After positioning the patient in the lateral decubitus position on the operation table, an anteroposterior view of the hip was taken. The pelvic pitch was measured on the X-ray. A positive pitch was defined as the caudal rotation of the upper hemipelvis. Our target abduction of the cup was 43°. We used the cup holder to guesstimate the cup abduction. In a preliminary study, we found that the weight of the cup holder increased the pelvic pitch by 5°. Thus, the target abduction of the cup holder was calculated by a formula: 43° – pelvic pitch – 5°. During the cup insertion, the cup holder was anteverted to the calculated target according to the concept of combined anteversion. We evaluated 478 THAs (429 patients), which were done with the use of the method. Results: The mean cup abduction was 43.9° (range, 32.0°–53.0°) and the mean error of cup abduction was 2.4° (standard deviation [SD], 2.0°; range, 0.0°–11.0°). The mean cup anteversion was 28.5° (range, 10.0°–42.0°) and the mean error of cup anteversion was 6.7° (SD, 5.2°; range, 0.0°–27.6°). Of all, 82.4% of the cups (394 / 478) were within the safe zone: 30°–50° abduction and 10°–35° anteversion. During 2- to 5-year follow-up, no hip dislocated. Conclusions: Our adjusting method according to the pelvic pitch can be a reliable option for optimizing the cup abduction in THA.
이정회,박찬호,한상훤,김태균,윤기현,최동진,문봄내,양윤식,손창학 인제대학교 백병원 2001 仁濟醫學 Vol.22 No.2
Dermatofibrosarcoma protuberans(DFSP) is an uncommon cutaneous tumor, which is characterised by slow invasive growth, marked tendency of local recurrence after excision and infrequent metastasis. Initially, most DFSPs are noticed as plaque like areas of cutaneous thickening and frequently have a reddish at the margins. As the tumor increases in size it is typically described as a raised, firm, multinodular mass that is fixed to the overlying skin, but movable over the deeper tissues. The authors report a case of recurrent DFSP, developed on the right anterior chest of a 32-year-old man. There was no evidence of metastasis.
스마트팩토리 구축 제조기업 조직원이 지각한 상사의 변혁적리더십이 셀프리더십과 LMX를 통하여 직무만족에 미치는 영향
정회우 ( Jung Hoi-woo ),황찬규 ( Hwang Chan-gyu ),김창섭 ( Kim Chang-sup ) 한국융합과학회(구 한국시큐리티융합경영학회) 2021 한국융합과학회지 Vol.10 No.1
연구목적: 이 연구는 스마트팩토리 구축 제조기업 조직원이 지각한 상사의 변혁적 리더십이 셀프리더십과 LMX(상사-부하교환관계)를 통한 직무만족에 미치는 영향을 규명하는데 주된 목적이 있다. 연구방법: 본 연구는 2020년 1월~2020년 6월 약 6개월간 이루어 졌으며, 경기도 소재 스마트팩토리 구축 제조기업의 종사자를 대상으로 하였다. 표집방법은 유의 표집법을 적용하였으며 최종분석에 사용된 사례수는 242명이다. 입력된 자료 처리는 SPSS 20.0 프로그램을 활용하여 분석기법은 요인분석, 신뢰도분석, 상관관계분석, 다중회귀분석, 단순회귀분석, Baron과 Kenny의 3단계 매개효과분석 등을 적용하였다. 결과: 첫째, 스마트팩토리 구축 제조기업 조직원이 인식하는 상사의 변혁적 리더십 중 개별적 배려는 직무만족에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 스마트팩토리 구축 제조기업 조직원이 인식하는 상사의 변혁적 리더십의 하위요인 카리스마, 지적 자극, 개별적 배려 순서로 셀프리더십에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 셋째 셀프리더십은 변혁적 리더십과 직무만족의 관계를 완전매개하는 것으로 나타났다. 넷째, 셀프리더십는 직무만족에 유의한 정 (+)의 영향을 미치는 것으로 나타났다. 다섯째, 셀프리더십과 직무만족 간의 관계를 완전매개하는 것으로 나타났다. 여섯째, LMX(상사-부하 교환관계)는 변혁적 리더십과 직무만족 간의 관계를 완전매개하는 것으로 나타났다. 결론: 따라서 스마트팩토리구축 제조 기업 조직원의 직무만족을 향상시키기 위하여 다양한 상사의 변혁적 리더십과 셀프리더십 LMX(상사-부하 교환관계)의 필요성이 재기된다. Purpose: The main purpose of this study is to investigate the influence of the supervisor' transformational leadership perceived by members of building a smart factory manufacturing company on job satisfaction through self-leadership and LMX. Methods: This study was conducted for about 6 months from January 2020 to June 2020, and was targeted to employees of manufacturing companies in Gyeonggi Province that established smart factory. Purposive sampling method was used, and 242 cases used in the final analysis. The data was processed using factor analysis, reliability analysis, correlation analysis, multiple regression analysis, simple regression analysis, and Baron and Kenny's 3-step mediation analysis with the SPSS 20.0 program. Result: The results are as follows. First, supervisor‘s transformational leadership has a significant positive effect on job satisfaction. Second, supervisor‘s transformational leadership has a significant positive effect on self-leadership. Third, self-leadership completely mediated the relationship between transformational leadership and job satisfaction. Fourth, self-leadership has a significant positive effect on job satisfaction. Fifth, relationship between self-leadership and job satisfaction was completely mediated. Sixth, the LMX completely mediated the relationship between transformative leadership and job satisfaction. Conclusion: Therefore, it is shown that the supervisor’s transformational leadership, members’ self-leadership and LMX are very important factors in the job satisfaction of members of building a smart factory manufacturing companies.
김찬회(Chan-Hoi Kim),이중원(Jung-Won Lee) 한국생활환경학회 2009 한국생활환경학회지 Vol.16 No.1
The purpose of this study is to examine the effects of exercise environment to your body through aerobic exercise which is many people had participated for health promoting and weight loss. For the purpose, oxygen concentration was voluntarily controled to 21% which was exercise environment in outdoor and to 19% which was exercise environment in indoor, and the process of physical change was observed, in the end the importance of exercise environment would be presented. 11 subjects were selected who were in good health undergraduate students at department of physical education in Ⅰ university. All subjects performed the exercise in voluntarily controled environment both in 19% and 21% oxygen concentration with VO₂ max 60% for 30 minutes. There were significant differences in MDA, SOD, cortisol, FFA, and lactate according to the measurement periods in all the groups. There was significant difference in lactate at post-exercise between 19% and 21% oxygen concentration groups. Exercise environment in 19% oxygen concentration group was more stressful and more quickly exhausted physical strength than exercise environment in 21% oxygen concentration group. However stress and the accumulation of fatigue substance was decreased also burning fat was increased in 21% oxygen concentration group. Therefore it would be necessary to maintain the oxygen concentration at indoor for moderate exercise though exercise would be performed in indoor, because indoor aerobic exercise which is not well ventilated might increase fatigue and decrease energy expenditure efficient.
Perioperative Concerns and Complaints of Patients Undergoing Total Hip Arthroplasty
Park Jung Wee,Lee Young-Kyun,Hong Seok Kim,Jung-Taek Kim,Yong-Chan Ha,Kyung-Hoi Koo 대한정형외과학회 2023 Clinics in Orthopedic Surgery Vol.15 No.1
Background: Preoperative concerns of patients undergoing total hip arthroplasty (THA) and their complaints during the initial postoperative period are not well investigated. We evaluated preoperative concerns of patients and patient-perceived problems during the operation and initial 5 days after the operation. Methods: One hundred and thirty-two patients, who underwent primary THA at a tertiary referral hospital, were surveyed using a questionnaire and a face-to-face interview 1 day before the operation, operation day, and postoperative days 1, 2, 3, and 4. The severity of pain was assessed daily using a visual analog scale. Results: The most common preoperative concern was the severity of pain after the surgery (65.2%), followed by the need of transfusion (34.8%) and postoperative rehabilitation (32.6%). Among 29 patients who could recall the experience during the operation, 12 (41.4%) suffered from shoulder pain on the contralateral side, and 6 (20.7%) answered that hammering sound had been annoying. After returning to the ward, 29 patients (22.0%) suffered from nausea, 8 (6.1%) complained of back pain, and 7 (5.3%) had ipsilateral knee pain. On postoperative day 1, 7 patients (5.3%) had persistent back pain, 8 (6.1%) had headache, and 5 (3.8%) suffered from nausea. On postoperative day 2, nine patients (6.8%) complained of radiating pain due to aggravation of preexisting spinal stenosis, 7 (5.3%) complained of weakness of the hip flexor due to periarticular injection of ropivacaine during the operation, and 5 (3.8%) had dressing-related skin problem at the wound. On postoperative days 3 and 4, patients had no problem other than hip pain. The mean pain score was the highest (3.1 ± 1.0) on postoperative day 1. Conclusions: The results of this study might provide information needed to solve problems and improve satisfaction of patients undergoing THA.