외상성 반월상 연골 파열의 관절경적 절제술 후 장기 추시 결과

서재성,민학진,윤의성,김희선,김윤종,김유미,Seo, Jae-Seong,Min, Hak-Jin,Yoon, Ui-Seong,Kim, Hee-Seon,Kim, Yoon-Jong,Kim, Yoo-Mih 대한관절경학회 2005 대한관절경학회지 Vol.9 No.2

Purpose: To study the long-term outcome of arthroscopic meniscectomy with regard to clinical symptoms and radiographic signs of osteoarthritic change. Materials and Methods: The materials for the investigation consisted of 79 individuals among 144 patients who underwent knee arthroscopy due to an isolated meniscal tear from October 1990 to September 1992 in our hospital. Those 79 individuals were followed up for $10{\sim}15$ years after the knee arthroscopy and were took clinical examination through the review of knee radiographies obtained with weight bearing. 52 of the 79 patients were men, and the mean age of the total materials was 34.6 years old (in the range $17{\sim}48$). Results: At follow-up, radiographic changes including Fairbank changes and joint space narrowing were seen from 45 of the 79 patients (56.2%). In other calculation, radiographic changes were seen in 23 out of 54 patients (42.6%) who had a partial meniscectomy, but were presented in 22 out of 25 patients (88.0%) who had a total meniscectomy. As a result, more radiographic changes were seen after total meniscectomy (p=0.03). In clinical results, 39 out of 54 patients (72.2%) after partial meniscectomy were satisfactory, and 14 out of 25 patients (56.0%) after total meniscectomy were satisfactory, therefore, more percentage of patients were satisfactory in partial meniscectomy group than in total meniscectomy group, but the statistical differences were absent (p=0.24). Conclusion: The frequency of radiographic changes in $10{\sim}15$ years after meniscectomy was related to the quantity of the meniscus removed, but the differences of these changes were low and had little influence on activity and knee function. 목적: 관절경을 이용한 반월상 연골 절제술 후의 슬관절의 임상적 및 방사선학적 변화를 알아보고자 한다. 대상 및 방법: 1990년 10월부터 1992년 9월까지 반월상 연골의 손상으로 본원에서 슬관절의 관절경적 시술을 시행 받은 144명의 환자 중 $10\sim15$년 뒤 장기 추적이 가능했던 79명의 환자를 대상으로 임상적 평가와 체중 부하 슬관절 방사선 촬영을 시행하여 그 변화를 관찰하였다. 79명 중 52명은 남자였으며, 평균 연령은 34.6세$(17\sim48)$였다. 결과: 추시 결과, Fairbank 변화와 관절강 협소를 포함한 방사선학적 변화는 부분 절제술 후 54예 중 23예(42.6%), 전 절제술 후 25예 중 22예(88.0%)에서 발생하여 전 절제술 후 많은 변화를 보였다(p=0.03). 임상적 결과는 부분 절제술군에서 만족이 54명 중 39명(72.4%), 전 절제군에서 25명 중 14명(56.0%)으로 부분절제술 후 만족도가 높았으나 통계적 의의는 없었다(p=0.24). 결론: 반월상 연골 절제술 후의 평균 12년 후 추시 결과, 방사선적 변화는 전 절제술시 크게 나타났으며, 이러한 변화는 슬관절 기능과 활동성에 영향을 미치지 않는 것으로 생각된다.

염산용액(鹽酸溶液)에서 Tri-Butyl Phosphate(TBP)에 의한 주석(朱錫)(IV)의 용매추출(溶媒抽出)

서재성,안재우,이만승,Seo, Jae-Seong,Ahn, Jae-Woo,Lee, Man-Seung 한국자원리싸이클링학회 2010 資源 리싸이클링 Vol.19 No.3

염산용액으로부터 TBP(Tri-butyl Phosphate)를 사용하여 주석(IV)의 추출에 대한 기초연구를 실시하였다. 수용액상에서 염산과 염소이온($Cl^-$) 농도, 주석 농도 및 추출제 농도 등과 같은 실험인자들이 주석의 추출에 미치는 영향을 조사하였다. 염산과 염소이온 농도가 증가할수록 주석의 추출율이 증가하였고, 7.0M의 염산농도에서 10% TBP에 의해 주석이 98%이상 추출되었다. McCabe-thiele 도표 분석을 통해 주석의 연속 추출에 필요한 이론적인 최적 추출단수를 구하였다. 한편 탈거액으로 NaOH 용액이 효과적이었고, 2.0M NaOH 에서 99.3%이상의 높은 탈거율을 나타냈다. Solvent extraction behavior of Sn(IV) from hydrochloric acid solution was investigated using TBP(Tri-butyl Phosphate) as an extractant. The experimental parameters, such as the concentration of HCl solution, chloride ions, extractant, and Sn were observed. Experimental results showed that the extraction percent of Sn was increased with increasing the hydrochloric acid and chloride ion concentration. More than 98% of Sn was extracted in 7.0 M HCl by 10% TBP. The optimum extraction stages of Sn for continuous extraction process was theoretically calculated by analysizing the McCabe-Thiele diagram. Stripping of Sn from the loaded organic phases can be accomplished by NaOH as a stripping reagent effectively and 99.3% of Sn was stripped by 2.0M NaOH solution.

유아 이동운동발달 분석 및 예측성 검증

서재성(Jae Seong Seo),김석일(Seok Il Kim) 한국사회체육학회 2009 한국사회체육학회지 Vol.0 No.36

유아 신체활동 척도(PAQC) 타당화 검증

서재성(Jae Seong Seo),김택훈(Taek Hoon Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.40

The purpose of this study lies in complementing the validation process of Physical Activity Questionnaire for Young Children developed in English-speaking world and actually apply to the Korean young children in terms of conception and statistics. 307 parents of 4, 5, 6 years of living in Seoul were selected as participants for the research. Translation and back-translation process, Descriptive Statistics of item analyzed result, krutosis and skewness were all stable. Corrected Item- Total Correlation and item-delete Conbach`s α were estimated low compared to Total Item Conbach`s α. Test-retest of every items appeared to be over .86 in its reliability. item 7 of factor 1 carried person-fit index according to the Confirmatory factor analysis(CFI, GFI: .93~98; RMR: .034: RMSEA; .020). The difference in groups according to sex appeared to be higher in physical activity standard to the male children than female children.

인공 슬관절 전치환술 시 압박대의 압력에 따른 대퇴부 동통과 실혈량에 대한 영향

서재성 ( Jae Seong Seo ),민학진 ( Hak Jin Min ),윤의성 ( Ui Seoung Yoon ),김진수 ( Jin Soo Kim ),조기현 ( Ki Hyun Jo ),김용훈 ( Yong Hoon Kim ),박철희 ( Cheol Hee Baak ) 대한슬관절학회 2008 대한슬관절학회지 Vol.20 No.2

목적: 인공 슬관절 전치환술에서 압박대의 압력에 따른 수술 후 대퇴부 동통 및 실혈량의 변화를 비교해 보고자 하였다. 대상 및 방법: 2003년 7월부터 2005년 2월까지 본원에서 인공 슬관절 전치환술을 시행한 161명의 환자를 대상으로 전향적 연구를 시행하였다. 압박대의 압력을 300 mmHg로 사용한 군(I군)과 수축기 혈압보다 100 mmHg 높은 압력을 사용한 군(II군)으로 나누어 술 후의 대퇴부 동통의 발생빈도, 동통의 강도 및 실혈량을 측정하여 비교 분석하였다. 결과: 술 후 대퇴부 통증의 빈도는 술 후 12시간째 I군(72.5%), II군(70.7%), 24시간째 I군(77.4%), II군(50.1%), 72시간째 I군(58.1%), II군(34.7%)으로 II군에서 통계적으로 유의하게 낮게 측정되었으며, 통증의 강도도 술 후 6시간(p=0.04)과 72시간(p=0.02)에서 II군에서 통계적으로 유의하게 낮게 나타났다. I군과 II군에서 수술 후 실혈량에는 통계적으로 유의한 차이가 없었다. 결론: 인공 슬관절 전치환술 시 수축기 혈압보다 100 mmHg 높은 압력의 압박대를 사용함으로써 술후 지혈대에 의한 대퇴부 동통을 감소시킬 수 있었으며, 300 mmHg의 압력을 사용하였을 때와 비교 시술후 실혈량에 영향을 미치지 않았음을 확인하였다. Purpose: We wanted to analyze the effects of tourniquet pressure on the postoperative thigh pain and blood loss of patients who undergo total knee arthroplasty. Materials and Methods: This prospective randomized study focused on one-hundred sixty-one unilateral total knee arthroplasties that were done with using a tourniquet. The tourniquet pressures were 300 mmHg in group I (seventy-four cases) and 100 mmHg higher than the systolic blood pressure in group II (eighty-seven cases). We analyzed the postoperative thigh pain with using a visual analog scale (VAS), and we assessed the hemoglobin levels and the hematocrits. Results: The incidence of postoperative thigh pain in group II was statistically lower than that of group I. The intensity of the postoperative thigh pain of group II was lower than that of group I at both 6 hours and 72 hours after surgery. There were no statistical differences in blood loss between the two groups. Conclusion: Using a tourniquet pressure of 100 mmHg above the systolic blood pressure during total knee arthroplasty can reduce the postoperative thigh pain. When comparing the above technique with a TKA using 300 mmHg of tourniquet pressure, there was no statistically significant difference of the postoperative blood loss.

가토 적출 폐장의 장시간 보존에 관한 실험적 연구

이종국,서재성,Lee, Jong-Guk,Seo, Jae-Seong 대한흉부심장혈관외과학회 1994 Journal of Chest Surgery (J Chest Surg) Vol.27 No.9

We have modified the isolated perfused working rabbit lung model [IPWL] by perfusing the isolated lung with a hollow fiber membrane deoxygenator.For assessment the stored lung was ventilated with FIO2 0.4 and perfused with 37$^{\circ}$C deoxygenated circulating blood at a rate 5ml/kg/min for several hours until lung failure.We chose to compare our developing solution which contained low potassium and pentastarch with the modified Euro-Collins solution .Experiments were divided into four groups[n=6] based on the type of flushing preservation solution and preservation time.The flushed lungs were then preserved into same solution at 8~10$^{\circ}$C with 100% O2 inflated condition for 1 or 20 hours.These following results were obtained.The IPWL model requires only one animal per experiment and allows for the continuous assessment of aerodynamic performance. This should therefore be used as screening test in lung preservation.One hour preservation groups, there were no significant difference in recovery rates of PaO2, PAP and Paw. Survival time in the one hour preservation groups were very significant long in the Group II[LPPS, p<0.01]. Twenty hours preservation groups, there were no significant difference in the recovery rates of PAP and Paw between Group III[m-ECS] and Group IV[NS], but PaO2 was significantly worse at onset of reperfusion in Group III when compared with Group IV [p<0.05]. And also survival time in the 20 hours preservation groups were significant long in the Group IV [p<0.05].

황산동용액(黃酸銅溶液)에서 Aminophosphosphonic acid 관능기를 가진 이온교환수지에 의한 As, Sb, Bi 제거(除去)에 관한 연구(硏究)

안재우,서재성,Ahn, Jae-Woo,Seo, Jae-Seong 한국자원리싸이클링학회 2012 資源 리싸이클링 Vol.21 No.5

황산동 용액중에 불순물로 존재하는 Sb, Bi 및 As를 제거하기 위해 Aminophosphosphonic acid를 관능기로 함유한 이온교환수지를 사용하여 비교 실험을 실시하였다. 이들 불순물 제거 반응에 영향을 미칠 수 있는 반응온도, 반응시간, 이온교환수지양 등에 대하여 고찰하였다. 기초 실험 결과 약 88%의 Sb 및 94%의 Bi가 이온교환수지에 흡착되어 황산동용액으로부터 제거가 가능하였다. 그러나 As의 경우는 제거율이 10% 이하로 미미하였다. 한편, Bi 와 Sb가 흡착된 수지에서 황산과 염산용액을 이용하여 선택적으로 세출이 가능하였다. 연속흡착실험 결과 Sb 와 Bi의 경우는 2BV 후에는 98.1%와 96.6%의 높은 흡착율을 보였다. A comparative study has been carried out on the removal of impurities such As, Sb, Bi from the copper sulfate solution by ion exchange resin containing aminophosphosphonic acid as functional group. The various parameters which affect the removal of impurities; such as the reaction temperature, the reaction time, the amount of ion-exchange resins, the concentration of sulfuric acid in electrolyte, were studied. The basic experimental results showed that about 88% of Sb & 94% of Bi can be adsorbed in these chelate resins and removed from the copper sulfate solutions but As was removed below 10% from the solutions. And the selective elution of Bi and Sb from the adsorbed ion exchange resin also can be achieved by $H_2SO_4$ or HCl solutions. The results also showed that 98.1% of Sb and 96.6% of Bi can be adsorbed from the copper sulfate solutions after 2 Bed-volume of continuous ion exchange column test.

전자(電子)스크랩에서 구리 및 주석의 회수(回收)를 위한 질산(窒酸) 침출(浸出) 및 침출액(浸出液)에서 유리질산(遊離窒酸) 제거(除去) 연구(硏究)

안재우,서재성,Ahn, Jae-Woo,Seo, Jae-Seong 한국자원리싸이클링학회 2009 資源 리싸이클링 Vol.18 No.5

Fundamental study has been made on the recovery of copper from the electronic scrap by hydrometallurgical process. Nitric acid was used as a leaching agent to dissolve the metals such as Cu, Sn, Pb, Fe etc. from the crushed electronic scraps. TBP was employed to extract nitric acid from the strong nitric acid leaching solutions and to reclaim nitric acid. From the experimental results, Cu was effectively leached by 3.0-4.0 M nitric acid. And 95% of nitric acid in the leaching solution was extracted by 60% TBP, and 98% of nitric acid was stripped from the loaded organic phase by distilled water and it was possible to reuse as a leaching agent. 전자스크랩중에 함유된 구리 및 주석을 습식공정으로 회수하기 위하여 기초 연구를 실시하였다. 침출제로 질산을 이용하여 분쇄된 전자스크랩에서 구리, 주석, 납, 철 등의 금속 성분들에 대한 침출율을 조사하고 최적 침출조건을 제시 하였다. 이러한 질산 침출 용액으로부터 TBP를 이용하여 유리질산을 분리 추출하여 재활용하기 위한 기초 연구를 실시하였다. 실험 결과 3.0-4.0 M 질산으로 구리를 효과적으로 침출시킬 수 있었으며, 질산 침출액 중 유리질산을 60% TBP에 의해 95%정도 추출이 가능하였고, 유기상에 추출된 질산의 98%를 증류수에 의해 탈거하여 질산침출액으로 재사용이 가능하였다.

염산용액에서 Alamine 336에 의한 주석(4)의 용매추출

안재우 ( Jae Woo Ahn ),서재성 ( Jae Seong Seo ),이만승 ( Man Seung Lee ) 대한금속재료학회 ( 구 대한금속학회 ) 2010 대한금속·재료학회지 Vol.48 No.10

The solvent extraction behavior of Sn(IV) from hydrochloric acid was investigated using Alamine336 (Tri-n-cotylamine) as an extractant. The experimental parameters of the concentration of the HCl solution, chloride ions, extractant, and Sn(IV) were assessed. The results showed that the extraction percentage of Sn(IV) was more than 95% in our experimental range and was only slightly affected by the HCl concentration. The extraction reaction of Sn(IV) by Alamine 336 from the chloride solution was identified as follows: SnCl6(2-)+2R(3)NHCl(org)=(R3NH)2SnCl6(org)+2Cl-, and K=6.3×10(4). Stripping experiments of Sn(IV) from the loaded organic phase were done by using several stripping agents. A stripping percentage of 90% was obtained with a 2.0 M NaOH solution.

함(含)루테늄 스크랩으로부터 질산침출(窒酸浸出)에 의한 불순물(不純物) 제거(除去)

안재우,정동화,서재성,이기웅,이강명,이재훈,Ahn, Jae-Woo,Chung, Dong-Wha,Seo, Jae-Seong,Lee, Ki-Woong,Yi, Kang-Myung,Lee, Jae-Hoon 한국자원리싸이클링학회 2009 資源 리싸이클링 Vol.18 No.5

폐스크랩으로부터 Ru을 회수하기 위한 전처리 공정으로 질산을 침출제로 사용하여 Pb, Ba, Zn, Al, Bi, Ag Fe, Co, Zr, Si 등의 침출 거동을 고찰하고, 이들 성분들을 제거 할 수 있는 최적조건을 도출하고자 하였다. 실험결과 고액농도 250 g/L에서 10-15% 질산 용액으로 약 90%의 Pb를 침출시켜 제거할 수 있었다. 또한 Ba의 경우도 Pb와 유사한 침출 거동을 나타내었으며, 기타 금속원소들 중 Zn, Al, Bi, Ag, Fe, Co, Zr은 질산농도 증가에 따라 침출율이 증가하나 질산농도가 10% 이상에서는 침출율이 거의 일정하였다. 한편, Ru의 경우는 약 100 ppm 이하로 침출율이 미미하였고, 질산침출 후 잔사중에 Ru이 50%이상으로 농축됨을 알 수 있었다. A recovery process of Ruthenium from waste electronic scrap has been investigated by means of nitric acid leaching as a part of development for scrap pretreatment process to obtaining an optimum conditions for removal of removing various impurities such as Pb, Bi, Zn, Al, Bi, Ag Fe, Co, Zr, Si. From the experiments, 90% of Pb leached with 250 g/l pulp density in 10-15% nitric acid. Leaching behavior of Ba was also similar to that of the Pb, but those of other metal impurities, such as Zn, Al, Bi, Ag, Fe, Co, Zr, showed different behavior, in which the dissolution rate increased as the concentration of nitric acid in solution is increased up to the 10% $HNO_3$ in solution and then it was constant above 10% $HNO_3$ concentrations. Meanwhile, the dissolution of Ru in $HNO_3$ solution was less then 100ppm, and that the total content of Ru in undissolved residue scrap was resulted in an increment of 50%.