| 摘要 |
PURPOSE:To improve a life for a pressure sensor and to high-precisely measure hardness of a vital tissue at the inside of a coelom, by a method wherein gas or a soft elastic member is located between a pressure receiving surface of a pressure sensor at the inside of a probe and a moving shaft for transferring a press force. CONSTITUTION:A probe 4 for measuring hardness is inserted through an abdominal wall 2 through the medium of a tracurl 3, and a roller 20 is brought into contact with a surface of vital tissue 5. If the roller 20 is moved by an appropriate press force, a press force is exerted on a piston shaft 14 corresponding to hardness of a contact portion, the roller vertically moves against a coil spring 17 along an axial direction of an outer cylinder 11. The vertical movement is transferred to a pressure chamber 15 and is measured by a pressure receiving surface 6A of a pressure sensor 6. Instead of the coil spring 17, an proper soft elastic member may be housed in the pressure chamber 15. A pressure in an abdominal carvity is measured by the pressure sensor 6 through a connection hole 26 provided in the outer cylinder 11 and a fine tube 25. |
