Billiet E, Colardyn F
University Hospital, Ghent, Belgium.
Angiology. 1992 Dec;43(12):988-95. doi: 10.1177/000331979204301205.
The fast-flush device test--based on the square-wave principle--has been used in clinical practice to test the accuracy of fluid-filled pressure-monitoring systems. One assumption with the square-wave test is that the system is a second-order approximation. To elucidate the problem, the authors compared, in vitro, a reference test method (frequency response test), valid for second-order systems, with a pure square-wave test and a fast-flush device test. They showed that the two tested systems did not have any relation to the reference system, which suggests that the second-order approximation is not valid. Therefore, the fast-flush device test cannot be used reliably in testing the total chain of catheter, tubing, transducer, and monitor for invasive pressure measurement.
基于方波原理的快速冲洗装置测试已在临床实践中用于测试充液压力监测系统的准确性。方波测试的一个假设是该系统为二阶近似。为阐明该问题，作者在体外将适用于二阶系统的参考测试方法（频率响应测试）与纯方波测试和快速冲洗装置测试进行了比较。他们发现，两个被测系统与参考系统均无关联，这表明二阶近似并不成立。因此，快速冲洗装置测试不能可靠地用于测试用于有创压力测量的导管、管路、传感器和监测仪的整个链路。
