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FEM 을 이용한 용접형 금속 벨로우즈의 스프링 상수 해석
박창호(Piao Chang-hao),조종두(Cho Chong-du),허준용(Heo Jun-yong),김명구(Kim Myung-gu),이재한(Lee Jae-han) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
This study tries to analyze the spring constant of welded metal bellows by using FEM. For the purpose of application and newly design of welded metal bellows, the prediction of spring constant is very important. We employ a commercial package of ANSYS 8.0 to analysis the spring constant and use UTM to test the spring constant. Plane 42 and shell 51 element are used for spring constant analysis. The predicted spring constants are compared with the experimental one to discuss the rationality of spring constant analysis process. The analytical result agrees well with experimental data hence explaining the validity of FEM model.
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홍진화 ( Hong Jin Hwa ),송승훈 ( Song Seung Hun ),이재관 ( Lee Jae Gwan ),오민정 ( O Min Jeong ),서호석 ( Seo Ho Seog ),박용균 ( Park Yong Gyun ),허준용 ( Heo Jun Yong ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.3
목적 : 증상을 동반하는 자궁 근종의 치료로서 자궁 동맥 색전술의 치료 효과에 대해 알아보고자 한다. 연구 방법 : 2000년 1월부터 2002년 3월까지 자궁 근종으로 진단 받은 40명의 환자들을 대상으로 본 시술을 시행하였다. 시술 후 1개월, 2개월, 3개월, 6개월, 12개월마다 외래 추적 검사를 실시하였다. 추적 검사 기간 중에 자궁 근종의 용적, 혈청 헤모글로빈 수치, 월경 지수 등을 측정하였다. 결과 : 환자들의 주 증상은 월경 과다(85%), 월경통 (35%), 골반통 (10%)이었고, 대부분의 환자들은 시술 3개월 후에 증상의 호전을 보고하였다. 또한 혈청 헤모글로빈의 수치와 생리 지수의 변화는 환자의 증상의 호전과 유의한 상관관계를 나타내었다. 그리고 자궁 근종의 용적도 1개월 후 40%, 3개월 후 56%, 6개월 후 71%, 12개월 후 72%의 감소를 보였다. 결론 : 자궁 근종의 치료 방법으로서 자궁 동맥 색전술은 최소 침습적이면서도 효과적인 치료법이라고 생각된다. Objective : To evaluate the role of uterine artery embolization as treatment for symptomatic uterine leiomyoma. Methods : From January 2000 to March 2002, 40 consecutive patients (mean age, 42.5 years; range, 27-53 years) underwent uterine artery embolization for the treatment of uterine leiomyomas. After a nonselective pelvic arteriogram was obtained, bilateral embolization was performed in each case. After discharge from the hospital, the patients were followed up at regular intervals (at 1st, 2nd, 3rd months, at 6th months, at 12 months and annually thereafter). The mean duration of follow-up was 11.5 months (range; 2-30 months). During the follow-up period, consecutive myoma volume, serum hemoglobin, menstrual index (MI) were checked. All patients were contacted by telephone to confirm any change in their symptoms after the embolization and were questioned regarding their satisfaction with the procedure. Results : A total of 40 patients were treated successfully. Initially, the presenting symptoms of the participants were menorrhagia (34.40, 85%), dysmenorrhea (14/40, 35%) and bulk symptoms (4/40, 10%). Most patients had improvement in symptoms by 3 months after the procedure and patient satisfaction paralleled the symptom change. Of 34 patients who initially presented menorrhagia, 28 patients checked their own serum hemoglobin levels and recorded MI regularly. The patterns of change of serum hemoglobin levels and MI during follow-up period were statistically correlated with their symptom changes. And the mean dominant myoma volume was reduced by 40% after 1 month, by 56% after 3 months, by 71% after 6 months and by 72% after 12 months (ANOVA, SAS 8.0, p<.0007). Conclusion : We conclude that uterine artery embolization for leiomyoma is minimally invasive and effective method of treatment. Most patients report improved symptoms and satisfaction with the outcome from treatment.
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