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전방십자인대 파열에 있어 대퇴과간 절흔 폭과 후방 경골 경사각의 임상적 의의
서승석 ( Seung Suk Seo ),김창완 ( Chang Wan Kim ),김경환 ( Kyung Whan Kim ),민영경 ( Young Kyoung Min ) 대한슬관절학회 2010 대한슬관절학회지 Vol.22 No.3
목적: 대퇴과간 절흔 폭과 후방 경골 경사각이 전방십자인대 파열 및 파열 위치에 미치는 영향에 대하여 알아보고자 하였다. 대상 및 방법: 2002년 2월부터 2009년 7월 사이에 본원에서 전방십자인대 파열로 치료받은 환자 105예 (105명) 및 대조군으로 전방십자인대 비파열군 91예(91명)에 대하여 단순 방사선 사진을 이용하여 대퇴 과간 절흔 폭과 후방 경골 경사각을 측정하였다. 또한 전방십자 인대의 파열 위치에 따라서 대퇴골 부착부위, 중간부위, 경골부착부위 파열군으로 분류하여 각 군에서의 상관관계를 분석하였다. 결과: 대퇴과간 절흔 폭의 평균은 전방십자인대 파열군 15.51±4.30 mm (95% confidence interval: 15.48∼15.53), 비파열군 24.49±3.86 mm (24.47∼24.52)이었으며, 후방 경골 경사각은 파열군 평균 7.68±3.78o (7.65∼7.70), 비파열군 6.12±3.85o (6.10∼6.13)이며, 대퇴과간 절흔 폭과 전방십자인대 파열 사이에는 연관성이 있었다(교차비=0.661 [0.602∼0.720], p<0.01). 후방 경골 경사각과는 연관성이 없었다(교차비=1.073 [1.062∼1.134], p=0.197). 파열 위치에 따른 분산분석에서는 통계학적으로 의미있는 결과를 관찰 할 수는 없었다. 결론: 전방십자인대 파열에 있어서 대퇴과간 절흔 폭의 감소는 의미있는 위험 요소임을 알 수 있었다. Purpose: The purpose of this study was to evaluate the relationship between the femoral intercondylar notch width (ICW), the posterior tibial slope angle (PTS), rupture of the anterior cruciate ligament (ACL) and the ruptured site. Materials and Methods: We retrospectively reviewed 105 cases of ruptured ACL (105 patients), and 91 cases of intact ACL (91 patients). The ICW and PTS were measured from the plain knee radiographs. The ratio of the ICW and the femoral intercondylar notch height (ICH) was also measured. As for the site of ACL rupture, the patients with a ruptured ACL were divided into 3 groups (group 1: femoral attach site, 2: mid-substance, 3: tibial attach site), and the correlations between the ICW and the PTS of each group were analyzed. Results: The mean ICW of the ACL ruptured group was 15.51±4.30 mm (95% confidence interval: 15.48∼ 15.53), that of the ACL intact group was 24.49±3.86 mm (24.47∼24.52), and the mean PTS of the ruptured ACL group was 7.68±3.78o (7.65∼7.70) and that of the intact ACL group was 6.12±3.85o (6.10∼6.13). A narrow ICW was a significant risk factors for ACL rupture (odds ratio=0.661 [0.602∼0.720], p<0.01). But we did not get any statistically significant results for the increase PTS (odds ratio=1.073 [1.062∼1.134], p=0.197). According to the ruptured site, the analysis of variance of the ICW and PTS had no significant correlation. Conclusion: A narrow ICW is a significant risk factor for ACL rupture.
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인공 고관절 전치환술에서 관절 주위 다중약물투여를 이용한 통증조절
최장석 ( Jang Seok Choi ),김정한 ( Jung Han Kim ),곽희철 ( Heui Chul Gwak ),김정원 ( Jung Won Kim ),민영경 ( Young Kyoung Min ) 대한고관절학회 2010 Hip and Pelvis Vol.22 No.4
Purpose: This study attempted to evaluate the pattern of change of the pain after total hip arthroplasty (THA) and to confirm the effect of periarticular multimodal drug injection (PMDI) on controlling the early postoperative pain. Materials and Methods: Of the total patients who underwent primary THA at our hospital because of osteonecrosis of the femoral head from March to October 2008, 60 patients were enrolled in this study. The subjects were divided into three groups. Groups 1 & 2 received periarticular injection. Group 1 included the patients who were injected with a combination of opioid, long-acting local anesthetics, a non-steroidal anti-inflammatory drug and epinephrine. Group 2 received a combination of morphine and ropivacaine and group 3 was not injected with any analgesics. The visual analogue scale (VAS) at 4 hours, 8 hours, 12 hours, 24 hours, 2 days, 3 days, 5 days, 14 days and 1 month after surgery, the frequency that patients pushed the self-controlled pain medication machine for 2 days after surgery and the amount of clonac that was injected according to the needs of the patients were used as objective measures. Results: The VAS score at postoperative 4 hours to 3 days among the groups showed a significant difference (P<0.05), but the VAS scores at postoperative 5 days to 1 month among the groups showed no significant difference (P>0.05). The frequency of pushing the self-controlled pain medication machine among the groups and the amount of clonac according to the needs of the patients among the groups showed that there were significant decreases at the operation day, the postoperative 1, 2 day and the 3 days (P<0.05). Conclusion: PMDI has a significant effect on controlling the early postoperative pain after THA.
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뉴토니안 대응점도를 이용한 Maddock mixing head의 해석
이기윤,민영경 忠南大學校 産業技術硏究所 1993 산업기술연구논문집 Vol.8 No.2
A theoretical and experimental study was conducted on the performance of the Maddock mixing head (abbreviation:MMH) in plasticating single-screw extrusion. For the theorectical study, the flow analysis network(FAN) method with the corresponding viscosity, so called, the equivalent Newtonian viscosity was used for the prediction of pressure variation in both the down-channel and cross-channel direction of MMH. And for the experimental study a low-density polyethylene was extruded in an extruder that had nine pressure transducers mounted almost equally spaced along the extruder axis, on the wall of the extruder barrel. Two screw with the MMH were used, namely: one screw to measure the pressure difference between the entrance and the exit of the mixing head in the down-channel direction and the other screw to measure pressure variations in the cross-channel direction in the middle of the mixing head. Our experimental results showed both pressure decrease and pressure increase in the down-channel direction of the mixing head depending upon the extrusion conditions employed. The experimental results successfully agreed with the theoretical predictions.
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