Loshakove A, Azhari H
Julius Silver institute of Biomedical Engineering, Technion IIT, Haifa, Israel.
Int J Med Inform. 1997 Apr;44(2):127-33. doi: 10.1016/S1386-5056(97)01266-5.
Stents are cylindrical devices implanted inside pathologic tubular passages within the body. The stents, which are made of metal or plastic, keep the passage open for flow (of blood, urine, air etc.) by applying radial pressure on the passage walls. In most cases the stents are selected empirically for each application. We introduce here a mathematical formula for computing the radial pressure induced by self expanding helical stents. The formula was verified experimentally for an urological stent using a special device. The results correlate well with the theoretical predictions (R = 0.997; y = 1.017 x -0.06 kg; SEE = 0.034, for forces and R = 0.9988; y = 1.04 x +8.7 mmHg; SEE = 25.3 for pressures). This formula can potentially serve as an analytical tool for selecting the most suitable stent for a given application.
支架是植入人体病理性管状通道内的圆柱形装置。由金属或塑料制成的支架通过对通道壁施加径向压力来保持通道开放以实现（血液、尿液、空气等的）流动。在大多数情况下，针对每种应用凭经验选择支架。在此我们引入一个用于计算自膨胀螺旋支架所产生的径向压力的数学公式。该公式通过使用一种特殊装置对一个泌尿外科支架进行了实验验证。结果与理论预测高度相关（对于力，R = 0.997；y = 1.017x - 0.06 kg；SEE = 0.034；对于压力，R = 0.9988；y = 1.04x + 8.7 mmHg；SEE = 25.3）。这个公式有可能作为一种分析工具，用于为特定应用选择最合适的支架。
