Remote sensing tonometric catheter apparatus

(57) It is the distant place pressure measurement catheter equipment (20) and the method which have been improved in order to carry out sample extraction of the characteristic of the fluid made into the object of the inside organ of a summary, or gas. A pressure measurement catheter (20) supports the early detection of the anemia of a tensional ulcer or intestines, or the problem of the both. A pressure measurement catheter (20) can be arranged in one or more sample extraction rooms (40) for the guidance to an internal organ or an adjoining domain. Other gases or fluid considered that the wall (36) of a sample extraction room (40) interferes in a sensor (42) although the gas or fluid measured from a sensor (42) can be permeated freely cannot be permeated.