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요도손상 환자에서 3일 이내에 시행한 일차적 내시경하 요도재배열술의 성공률과 합병증
정찬상,서일영,박승철,오상진,임정식 대한비뇨의학회 2004 Investigative and Clinical Urology Vol.45 No.10
Purpose: Attempts have been made to insert a urethral Foley catheter as a primary urethral realignment immediately after a urethral injury. There has been much debate about the time and method of the realignment. The feasibility and complications of early primary endoscopic realignment in a urethral injury were evaluated. Materials and Methods: From November 1990 to May 2003, 63 patients with urethral injuries received early endoscopic realignment within 72hrs. The diagnosis was made by retrograde urethrography. Primary realignment was successfully performed for 61 patients; 52(85.2%) had an anterior urethral injury and 9(14.8%) a posterior urethral injury. All operations were performed under spinal anesthesia. A cystoscope was inserted through the dilated suprapubic cystotomy and a guide wire passed through the cystoscope, and caught by transurethral foreign body forceps just distal to the injured site. The urethral catheter was removed after pericatheter urethrography, usually on the 14th postoperative day. Patients were retrospectively reviewed for complications, including urethral stricture, urinary incontinence and erectile dysfunction. Results: Of the 63 patients, 61(96.8%) were successfully treated. The mean operation and catheter indwelling times were 71.8 minute(5-109) and 17.4 days(6-32), respectively. The mean follow-up duration was 423.2 days (94-1432). Urethral strictures were detected in 14 patients(23.0%), who were treated with an internal urethrotomy. Urinary incontinence in 5 patients(8.2%) and erectile dysfunction in 14 patients (23.0%) were the observed complications. Conclusions: Our results show that immediate endoscopic realignment is a less invasive and more feasible therapy for patients with a urethral injury. (Korean J Urol 2004;45:1039-1043)
Cu-Zn-Al 형상기억합금의 첨가원소에 따른 감쇠능의 변화
이상관,정찬상 대한금속재료학회(대한금속학회) 1989 대한금속·재료학회지 Vol.27 No.1
The effect of misch metal, Ti, Ni and Mn on damping capacity of Cu-Zn-Al shape memory alloys and the optimum heat treatment condition for high damping of the alloy have been studied. Specific damping capacity(SDC) of both Cu-Zn-Al alloys and the elements added Cu-Zn-Al alloys show amplitude dependence and increase with increasing maximum strain amplitude. Maximum SDC of the Cu-Zn-Al alloys are not dependent of composition, but nearly constant about 42% in the range of transformation temperature. Maximum SDC of the elements added alloys is, however, decreased a little but the step quenching and low temperature aging process is suitable heat treatment condition to increase in SDC of the elements added alloys.