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박용근,장선미,하용찬 대한고관절학회 2014 Hip and Pelvis Vol.26 No.4
Purpose: Although the incidence of a second hip fracture is relatively well described, mortality and morbidity after a second hip fracture are seldom evaluated. The purpose of this study was to determine the incidence, morbidity, and mid-term mortality of a second hip fracture and evaluate the cause of death after a second hip fracture. Materials and Methods: Information on patients older than 50 years, who sustained a subsequent hip fracture, were obtained from the records of eight Jeju Island hospitals between 2002 and 2011 to calculate the incidence, morbidity, and mortality of hip fractures in this age group. All patients were followed a minimum of 2 years. A systemic search for death certificates at the National Statistical Office was conducted for patients who were lost to follow-up. Results: Of 2,055 hip fractures (419 men and 1,636 women), 98 were second hip fractures (13 men and 85 women) during the study period. The mean ages of the patients at the time of the first and second fractures were 78.8 and 80.8 years, respectively. The incidence of a subsequent hip fracture among the first hip fracture was 4.8%. Mean mortality rates at 6 months, 1 year, 2 years, and 5 years were 10.5%, 15.2%, 23.5%, and 42.0% respectively. Cumulative mortality after the second hip fracture at the 5 years follow-up was 41.8%. Conclusion: Our results demonstrate that a secondary fracture prevention program is necessary to prevent second hip fractures in elderly patients.
박용근,남광우,김상림,박민석,김상재,하용찬 대한골대사학회 2018 대한골대사학회지 Vol.25 No.2
Background: The authors had earlier conducted a retrospective cohort study from 2008 to 2011 in Jeju Island, among 945 hip fracture patients above 50 years of age. Of these 945 patients, 344 patients (36.4%) underwent a bone mineral density test and 218 patients (23.1%) received treatment for osteoporosis. The purpose of this study was to determine whether a patient education program could improve osteoporosis management after hip fracture. The data of the previous study was used for comparison. Methods: From November 1, 2014 to September 30, 2015, 190 patients above 50 years of age who were admitted for hip fractures at six different hospitals, were enrolled in the present study. During the hospitalization period, patients underwent education sessions and were provided brochures. Patients were evaluated for diagnosis and treatment of osteoporosis at six months after discharge and were followed-up for at least a year. Results: Of the 222 patients with hip fractures, 190 patients (37 men, 153 women) were enrolled at six hospitals in 2015. Dual energy X-ray absorptiometry was performed on 115 patients (60.5%) and 92 patients (48.4%) were prescribed medication for osteoporosis at the time of discharge. A total of 43.7% and 40.2% of the patients were found to be compliant with osteoporosis medication at 6 months and 12 months follow-up respectively. Conclusions: This interventional multicenter study demonstrated that a patient education program in patients with hip fractures can improve compliance to osteoporosis medication up to 12 months of follow-up.
자발성 뇌출혈 환자에서의 다중도관을 이용한 뇌정위적 수술의 평가
박용근,안영민,안영환,윤수한,조기홍,조경기 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.10
The treatment modality of patients with spontaneous intracerebral hematoma is still controversial. With remarkable development of CT-guided stereotactic techniques. stereotactic evacuation is preferable to conventional craniotomy due to local anesthesia and minimal brain damage. We reviewed 60 patients with hypertensive intracerebral hematoma. treated with CT-guided stereotactic aspiration and conventional craniotomy from Jan. 1995 to Dec. 1995. The patients were divided into three groups. Group I included the patients who had hematoma less than 30cc in volume and treated stereotactically using a single catheter. Group Ⅱ was consisted of patients who had hematoma more than 30cc and treated stereotactically using 2 or more catheters. Group Ⅲ was composed of the patients who showed neurologically rapid progression and treated with conventional craniotomy. We compared the results of the three groups of therapeutic modalities and made conclusions. Most of the spontaneous intracranial hematomas were removed completely within 5 days by the stereotactic method. This method was feasible to the patients. who had large volume of hematomas using multiple catheters.
박용근,이준혁,주아람,이순홍 한국고분자학회 2018 폴리머 Vol.42 No.2
본 연구에서는 우레탄 발포 공정 내 수발포 공법 및 나노기포 기술의 융합연구를 수행하였다. 폴리올은 amine base polyol과 sucrose polyol을 혼합해 제조하였으며, 나노기포 제조장치를 통해 폴리올 내에 나노기포를 생성하였다. 폴리우레탄 폼 제조 시 일반 폴리올과 CO2 나노기포 폴리올의 함량을 달리하여 나노기포가 발포체의 물성에 미치는 영향을 연구하였다. 나노기포의 생성 효율 향상을 위해 회전식 점도계를 이용해 점도분석을 진행하였으며, 생성된 나노기포의 확인을 위해 나노입자 추적 분석(nanoparticle tracking analysis, NTA)를 분석하였다. 제조된 폴리우레탄 폼의 물성평가를 위해 SEM, 밀도, 열전도도, 압축 및 굴곡강도 분석을 진행하였다. 나노기포는 약 150 nm 크기의 기포가 1 mL당 약 3.08×1010개 생성된 것을 확인하였으며, 나노기포의 함량이 증가됨에 따라 셀 균일도 및평균 셀 크기가 감소되는 경향을 보였다. CO2 나노기포 폴리올 적용 시, 일반 폴리올 대비 열전도도 18.8%, 굴곡강도 50%가 감소되었으며 압축강도가 16.1% 증가하는 것을 확인하였다.