Poulsen A L, Schou J, Ovesen H, Nordling J
Department of Urology, Herlev Hospital, Denmark.
Br J Urol. 1993 Sep;72(3):331-4. doi: 10.1111/j.1464-410x.1993.tb00728.x.
Memokath (Engineers & Doctors A/S, Hornbaek, Denmark) is a new intraprostatic spiral composed of titanium nickel alloy with shape memory effect. We describe the use of this spiral in 30 consecutive patients with prostatic outflow obstruction. Their median age was 79 years and all were either in a high risk group for surgery or had refused surgery. The spiral was inserted under sterile conditions via a delivery catheter under ultrasonic guidance. When flushed with hot water (45 degrees C or above) one section of the spiral expands in the prostatic apex and maintains the spiral in position. When cooled with cold water (10 degrees C or below) the spiral becomes supersoft, making removal easy. With a follow-up of 0.2 to 9 months (median 3) we report a success rate of 83%. Five patients discontinued treatment, 3 because of urinary retention, 1 because of progressive obstructive symptoms and 1 following persistent urinary incontinence. No migration of the spiral was observed. Encrustations have appeared and seem to be a persistent problem. Most patients were satisfied with the procedure, which provided a quick, safe and effective method of relieving infravesical prostatic obstruction. Follow-up is short and late complications have yet to be assessed.
Memokath（丹麦霍恩贝克的工程师与医生股份公司）是一种新型的前列腺内螺旋装置，由具有形状记忆效应的钛镍合金制成。我们描述了连续30例前列腺流出道梗阻患者使用这种螺旋装置的情况。他们的中位年龄为79岁，所有人要么处于手术高风险组，要么已拒绝手术。该螺旋装置在超声引导下通过输送导管在无菌条件下插入。用热水（45摄氏度或更高）冲洗时，螺旋装置的一部分在前列腺尖部展开并将螺旋装置固定在位。用冷水（10摄氏度或更低）冷却时，螺旋装置变得超柔软，便于取出。随访0.2至9个月（中位时间3个月），我们报告成功率为83%。5例患者停止治疗，3例因尿潴留，1例因进行性梗阻症状，1例因持续性尿失禁。未观察到螺旋装置移位。出现了结壳现象，似乎是一个持续存在的问题。大多数患者对该手术满意，该手术提供了一种快速、安全且有效的缓解膀胱下前列腺梗阻的方法。随访时间较短，晚期并发症尚未评估。
