PROBLEM TO BE SOLVED: To provide a fluid pressure measuring apparatus which facilitates calibration without using the other pressure gauges when measuring fluid pressure of an object to be measured, especially fluid pressure in vivo, that is, measuring the pressure of blood flow (blood pressure).SOLUTION: The fluid pressure measuring apparatus includes at least two measuring parts 6 and 8, wherein the fluid velocity in and the diameter of the conduit which is inside a measured part are measured, the change amount of the conduit, the difference of the conduit diameters between one measuring part and the other measuring part, and the difference of the maximum value and the minimum value of the fluid pressure is obtained on the basis of the distance between the two measuring parts 6 and 8 which leads to water head difference, the coefficient is obtained on the basis of the difference value and the flow velocity value and the diameter value of the one or the other measuring part 6 or 8 so that the pressure of the fluid flowing in the conduit is obtained.COPYRIGHT: (C)2012,JPO&INPIT【課題】被測定対象の流体圧測定をする場合、特に生体内の流体圧すなわち血流の圧力(血圧)を測定する場合に、他の圧力計を使わず簡易に校正ができる流体圧測定装置を提供する。【解決手段】流体圧測定装置は、測定部6,8を少なくとも2つを備え、測定対象部に内在する導管内を流動する流体速度及び導管径を測定し、導管の変化量、前記一方の測定部と前記他方の測定部での導管径の差、及び前記2つの測定部6,8の間の距離に基づいて導き出される水頭差に基づいて導き出される、流体圧の最大値と最小値との差分を求め、前記差分値と、前記一方あるいは他方の測定部6,8における流速値及び径値と、に基づいて係数値を導き出し、前記導管内を流動する流体の圧力を求める。【選択図】図3
