Effect of Total Hip Arthroplasty on Ipsilateral Lower Limb Alignment and Knee Joint Space Width: Minimum 5-Year Follow-up

Choi Yun Seong,Park Jung-Wee,Kim Tae Woo,Kang Kee Soo,Lee Young-Kyun,Koo Kyung-Hoi,Chang Chong Bum 대한의학회 2023 Journal of Korean medical science Vol.38 No.20

Background: This study aimed to 1) assess the effect of total hip arthroplasty (THA) on coronal limb alignment, namely, the hip–knee–ankle angle (HKA), 2) identify factors that determine changes in the HKA, and 3) determine whether alignment changes influence the knee joint space width. Methods: We retrospectively evaluated 266 limbs of patients who underwent THA. Three types of prostheses with neck shaft angles (NSAs) of 132°, 135°, and 138° were used. Several radiographic parameters were measured in the preoperative and final radiographs (at least 5 years after THA). A paired t-test was used to confirm the effect of THA on HKA change. Multiple regression analysis was performed to identify radiographic parameters related to HKA changes following THA and changes in knee joint space width. Subgroup analyses were performed to reveal the effect of NSA change on the HKA change, and the proportion of total knee arthroplasty usage and changes in radiographic parameters between maintained joint space and narrowed joint space groups were compared. Results: The preoperative mean HKA was 1.4° varus and increased to 2.7° varus after THA. This change was related to changes in the NSA, lateral distal femoral angle, and femoral bowing angle. In particular, in the group with a decrease in NSA of > 5°, the preoperative mean HKA was largely changed from 1.4° varus to 4.6° varus after THA. The prostheses with NSA of 132° and 135° also led to greater varus HKA changes than those with an NSA of 138°. Narrowing of the medial knee joint space was related to changes in the varus direction of the HKA, decrease in NSA, increase in femoral offset. Conclusion: A large reduction in NSA can lead to considerable varus limb alignment after THA, which can have adverse effects on the medial compartment of the ipsilateral knee.

Dipyridamole 부하 심근 SPECT에서 Dipyridamole의 작용과 부작용

고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),최창운(Chang Woon Choi),배상균(Sang Kyun Bae),양형인(Hyung In Yang),여정석(Jeong Suk Yeo) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.2

N/A Dipyridamole is an agent that may be used to noninvasively evaluate coronary artery disease. The effect of dipyridamole infusion its generally related to its induced peripheral vasodilatory effect. In normal person, heart rate is generally increased slightly while blood pressure decrease, but the achieved double product and related myocardial oxygen consumption have no significant change. The purpose of this study is to examine the effect and side effect of dipyridamole, and to compare different response to dipyridamole among the patients. We evaluated 847 patients who underwent dipyridamole stress myocardial SPECT. 93.6% of them had induced hypotension 0.9% showed no change of blood pressure, 5.5% had increased blood pressure 8.3% had no change of pulse rate more than 10% of basal pulse rate. Among diabetes, 16.9% was not change of pulse rate, 6.7% in non-diabetes. There was no significant correlation between age and rate pressure product rest(RPPr), in patients without perfusion defects on SPECT(y=7.1x+48.4r=0.13 p>0.01). As increasing age, RPPs/RPPr was declined(y=-11.6x+68.9 r=0.17 p〈0.01), similar results were obtained in patients with perfusion defect. The size of perfusion defect on myocardial SPECT have no correlation between RPPr and RPPs/RPPr. The side effects of dipyridamole included chest pain and chest tightness, headache, abdominal pain, dizzness, nausea, and dyspnea. As increasing age, dipyridamole-induced cardiac work at rest was increased, cardiac response to dipyridamole was decreased.

4분과 : 미래 기후변화 시나리오에 따른 우리나라 소나무 임부의 재적 추정

김문일 ( Moon Il Kim ),이우균 ( Woo Kyun Lee ),( Gui Shan Gui ),( Hang Nan Yu ),최솔이 ( Sol E Choi ),김창길 ( Chang Gil Kim ),권태성 한국임학회 2014 한국산림과학회지 Vol.103 No.1

본 연구는 우리나라 주요 수종인 소나무림을 대상으로 RCP(Representative Concentration Pathway)8.5 시나리오에 따른 임목 재적의 시·공간적 변이를 예측하기 위해 수행되었다. 전국 규모의 예측을 위해 5차임상도와 국가산림자원조사 자료를 이용하였으며, 기후와 공간의 변이가 임목 생장에 미치는 영향을 반영하기 위해 기상 및 지형인자를 반영한 생장모형을 적용하였다. 모형의 검증을 위해 시, 도별 산림통계와 모형 결과를 비교한 결과, 비교적 높은 적합도를 보이는 것으로 나타났다. 기후변화를 고려하였을 때, 소나무림의 임분 재적은 현재 131 m3/ha에서2050년에는 212.42 m3/ha까지 증가 할 것으로 예측되었으며, 현재의 기후가 유지될 경우에는 221.92 m3/ha까지 증가할 것으로 예측되었다. 기후변화의 영향으로 인해 일부 고산지대를 제외한 대부분의 지역에서 소나무림의 생장률이감소할 것으로 예측되었으며, 특히 해안지역과 남부지역에서 생장률의 감소가 클 것으로 나타났다. 본 연구결과를 통해 기후변화가 소나무림 생장에 미치는 영향을 시·공간에 따라 정량화 할 수 있었으며, 이는 기후변화 적응을 고려한 산림관리 및 시업계획을 수립하는데 유용하게 활용될 수 있을 것이다. The main purpose of this study is to measure spatio-temporal variation of forest tree volume basedon the RCP(Representative Concentration Pathway) 8.5 scenario, targeting on Pinus densiflora forests which is the main tree species in South Korea. To estimate nationwide scale, 5th forest type map and National Forest Inventory data were used. Also, to reflect the impact of change in place and climate on growth of forest trees, growth model reflecting the climate and topography features were applied. The result of the model validation, which compared the result of the model with the forest statistics of different cities and provinces, showed a high suitability. Considering the continuous climate change, volume of Pinus densiflora forest is predicted to increase from 131 m3/ha at present to 212.42 m3/ha in the year of 2050. If the climate maintains as the present, volumeis predicted to increase to 221.92 m3/ha. With the climate change, it is predicted that most of the region, except for some of the alpine region, will have a decrease in growth rate of Pinus densiflora forest. The growth rate of Pinus densiflora forest will have a greater decline, especially in the coastal area and the southern area. With the result of this study, it will be possible to quantify the effect of climate change on the growth of Pinusdensiflora forest according to spatio-temporal is possible. The result of the study can be useful in establishing the forest management practices, considering the adaptation of climate change.

요추 추간판탈출증 수술 후 임상 증상의 회복

신병준,김준범,조영훈,권희,서유성,김연일,나수균,최창욱 대한척추외과학회 1997 대한척추외과학회지 Vol.4 No.2

Study Design : The authors retrospectively analysed the recovery of clinical symptoms after surgical treatment of lumbar HIVD. Objectives : To investigate the incidence of clinical symptoms, the recovery rate and time after surgical treatment and the difference between L4-5 and L5-S1 lesion. Summary of Literature Review : There are many reports concerning the clinical result of surgical treatment for the HIVD. They usually describe the result as excellent, good, fair and poor. We can't get any information about the recovery rate and recovery time of each clinical symptom from the reports. Materials and Methods : Thirty-eight patients were treated by one level open discectomy from march 1991 to december 1995. The clinical symptoms and signs including SLR, motor deficit, sensory deficit, change of DTR and severity of radiating pain were periodically followed up on the predesigned protocol, Results : In preoperative examination, SLR was positive in 82%, motor deficit in 76%, sensory deficit in 74%, DTR change in 50%, and radiating pain in 100%. The recovery rate of SLR was 96.8%, motor deficit ; 93.6%, sensory deficit ; 78.6%, DTR change ; 21 % and radiating pain ; 84.2%. The average recovery time of SLR was 3.4 months, motor deficit ; 1.9 months, sensory deficit ; 5.3 months, DTR change ; 4.1 months and radiating pain ; 3.2 months. Motor and sensory deficit was more frequent in L4-5 lesion but DTR change was usually noted in L5-S] lesion. The recovery rate and time showed no great difference between the two level. Conclusions : The recovery rate was higher in SLR, motor deficit and radiating pain rather than sensory deficit and DTR change. The recovery time was fastest in radiating pain but variable nature was noted in sensory deficit. Above results may be helpful to explain the prognosis of the lumbar HIVD.

배양 대장암 세포주에서 변이 p21 단백질이 DNA 및 단백질 합성에 미치는 영향

최훈,장석균 대한대장항문학회 1999 Annals of Coloproctolgy Vol.15 No.4

CDMA 시스템의 Ec/Io 개선을 위한 순방향 채널의 전력분배에 관한 연구

김선미,최동유,류광진,박창균 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2

This study defined the way to distribute power of forward channel and suggested a new model for prediction power in order to minimize the deterioration of call quality and performance in the CDMA mobile communication system of narrow band using 1.2288MHz of narrow band. Each change in Ec/Io was measured for the factors affecting wireless environment(e.g. the changes in power of overhead channel, the changes in a number of call channel, and the increase in interference from the additional facilities of adjacent base station or other systems) to know the influence on the wireless environment of forward link. The new way for power distribution to a base station in operation and its validity was checked by comparing before and after test.

미래 기후변화 시나리오에 따른 우리나라 소나무와 참나무 임분의 탄소흡수량 추정

김문일 ( Moon Il Kim ),이우균 ( Woo Kyun Lee ),최솔이 ( Sol E Choi ),유동훈 ( Dong Hoon Ryu ),김창길 ( Chang Gil Kim ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구는 우리나라 주요 수종인 소나무와 참나무를 대상으로 RCP 8.5 시나리오와 산림 생장모형, 제5차 임상도를 이용하여 2020년에서 2050년까지의 미래 탄소 흡수량 변화를 예측하고, 이에 따라 두 수종의 미래 탄소 흡수량의 감소가 나타나는 취약 지역을 예측하기 위하여 수행되었다. 시 도별 산림통계와 모형의 결과를 비교한 결과, 비교적 높은 적합도를 보이는 것으로 나타났다. 이에 본 모형을 이용하여 추정한 탄소 흡수량은 현재와 기후가 같다고 가정하였을 때, 2050년 소나무 4.01(std. 1.42), 참나무는 4.38 tCO2/ha/year(std. 1.42)으로 2020년과 비교하여 각각 18.7%, 27.6% 감소하는 것으로 나타났다. 기후변화를 고려하였을 때에는 2050년 소나무 3.00(std. 2.42), 참나무가 5.82(std. 2.51) tCO2/ha/year으로 나타났다. 본 연구를 통하여 소나무와 참나무의 탄소 흡수량 변화를 추정할 수 있었으며, 이를 이용하여 미래 탄소 흡수 기능 취약지역을 분석 할 수 있었다. 이는 향후, 기후변화 적응을 위한 산림 분야의 정책 및 산림 관리 계획에 있어 기초 자료로서 활용될 수 있을 것이다. The purpose of this study was to predict of the carbon sequestration about Quercus spp. and P.densiflora 2020 to 2050 and vulnerable area such as decrease carbon sequestration by using RCP 8.5 scenarios and forest growth model, 5th forest type map. The comparison result between the province forest statistic data and predict data which is data from growth model showed a high suitability. The carbon sequestration was estimated using by two assumption. one of the result, which was assumed the future climate same current climate was appeared P.densiflora 4.01 (std. 1.42), Quercus spp. 4.38tCO2/ha (std. 1.42) in 2050. Each result decrease 18.7, 27.6 percent compared with 2020. another result, which is assumed the climate change in the future was appeared P. densiflora 3.00 (std. 2.42), Quercus spp. 5.82 (std. 2.51) tCO2/ha. Through this study we predicted not only carbon sequestration change but also, the vulnerable area about carbon sequestration function. The result of the study can be useful for the adaptation policy and forest management of climate change.

국내산 식물의 항균활성 검색

최원균,김용성,조규성,성창근 한국식품영양학회 2002 韓國食品營養學會誌 Vol.15 No.4

한국에서 자생하는 125종의 식물에서 추출한 141가지 메탄올 추출물들에서 식품부패미생물인 Bacillus subtillis, Staphylococcus aureus, Escherichia coli, Enterobacter aerogenes 그리고 Pseudomonas aeruginosa에 대한 항균 활성도를 조사하였다. Bacillus subtillis에 대해 가장 강한 항균력을 보인 것은 오미자였으며 staphylococcus aureus 에 대해서 대황이, Pseudomonas aeruginosa에 대해서는 산사가 가장 강한 항균력을 나타냈다. 금은화는 Bacillus subtilis를, 산사는 Stophylococcus aureus를, 모과와 황금은 Pseudomonas aeruginosa를, 모감주나무꽃, 밤나무꽃, 장미꽃과 파꽃은 Enterobacter aerogenes를, 오미자는 Escherichia coli를 제외한 나머지 4가지 균주에 모두 항균력이 있었다 141 methanol extracts from 125 plant species which populate in Korea were screened for antimicrobial activity against various food-borne pathogens and food spoilage microorganisms. Those plants were selected from 3 different plant groups : traditional herbs, edible plants and flowers. The methanol extracts were tested by using the disk diffusion assay against five bacteria : Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Enterobacter aerogenes, Escherichia coli. From the evaluation of the inhibition zone diameter of microbial growth, the most significant antimicrobial activity against bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Enterobacter aerogenes, Escherichia coli was observed from the extract of Schizandra chinensis (Turcz) Baill., Rheum officinale Baill., Schizandra chinesis (Turcz) Baill., Koelreuteria paniculata Lax and Crataegus pinnatifida Bunge, respectively. The extract from many plants - Koelreuteria paniculata Lax, Chaenomeles sinensis Koehne, Scutellaria bacicalensis Georgi, Castanea crenata Sieb. et Zucc., Rosa centifolia L;, Allium fistulosum L. var. giganteum Makino, Crataegus pinnatifida Bunge, Schizandra chinensis (Turcz) Baill., Lonicera japonica - showed antimicrobial activity all four tested bacteria.

디지털 멀티미디어 방송을 위한 8-VSB DTTB 최적 ERP와 안테나 HATT에 관한 연구

최동우,박창균 조선대학교 전자정보통신연구소 2001 電子情報通信硏究所論文誌 Vol.4 No.2

In this paper, we make plans for facilities, the 8-VSB DTV transmission system, installed in the near future, based on presently NTSC TV operating it. In the front paper, estimate transmission power for analog NTSC and digital 8-VSB terrestrial broadcasting, effecting condition of optimal receiving power result from it. It is to estimate optimal receiving condition by using Longley-Rice's Field Strength calculating method that is to guess a profile between transmitting station and many receiving points. The 8-VSB DTV Propagation aims to high-speed transmission rates of 19.39Mbps datum to enable HDTV(High Definition Television) at NTSC 6MHz bandwidth. First of all, an optimalization of field strength between transmission station and receiver must deal with considerable. Because of these reasons, 8-VSB DTV transmission needs effective extension for NTSC TV service coverage. As a result, Transition NTSC VHF(CH4) to DTV UHF(CH34) is expected to much four times transmitting output and then transition NTSC UHF(CH24) to DTV UHF(CH36) is expected to less seven times transmitting output to maintain that equal to NTSC TV is 8-VSB DTV service coverage.

해상에서의 수신전력 예측모델

최동유,박창균 조선대학교 전자정보통신연구소 2001 電子情報通信硏究所論文誌 Vol.4 No.1

The purpose of this study is to suggest the Rx Power prediction model for the sea service as a method to minimize unnecessary facilities investment and maintenance caused by additional or new building of a base station if mobile phone service for far or near distance sea is provided by expanding limited communication zone of narrow band CDMA mobile communication whose spread band FA is 1.2288MHz. Suggested Rx Power prediction model includes five parameters to minimize facilities investment of a base station and maximize channel capacity: equivalent line of sight, time delay by shift resister or chip delay by PN code, antenna altitude, power of base station and gain of antenna. Finally, suggested Rx Power prediction model is simulated and, the results are examined for its utility by comparing with and analyzing free space loss data.