Jackson J R, Williams B
J Biomed Eng. 1979 Jan;1(1):50-4. doi: 10.1016/0141-5425(79)90010-4.
An attempt has been made to develop a velocity probe using the Pitot principle for the measurement of fluid velocities in cerebrospinal fluid. Pressures were measured using conventional transducers and amplifiers and the pressure difference signal has the predicted relationship to the square of fluid velocity in the steady state. However, in the clinical situation where slowly propagated pressure waves accompany cerebrospinal fluid movement the pressure difference incorporates an indeterminate term unrelated to velocity, and this imposes severe limitations on the technique. Measurements and discussion are presented.
人们尝试开发一种利用皮托管原理的速度探头，用于测量脑脊液中的流体速度。使用传统的传感器和放大器测量压力，并且在稳态下压力差信号与流体速度的平方具有预期的关系。然而，在临床情况下，随着脑脊液流动会伴随缓慢传播的压力波，压力差包含一个与速度无关的不确定项，这对该技术施加了严重限制。文中给出了测量结果和讨论。
