Patent ID: 8364233

Claim:
A biodevice formed in an elongated form that is inserted inside an organism and capable of directly detecting and measuring an object under test inside the organism comprising: a shaft member at a center position of said biodevice, said shaft member extending in an axial direction and having a shaft diameter of 500 μm or less; and a conductive layer and an insulating layer which are stacked on a side surface of said shaft member in a direction transverse to said axial direction; wherein said biodevice has a cylindrical hollow section formed therethrough, being connected to the exterior at a front end and extending from said front end in said axial direction, said hollow section having an electrode section on an inner surface; and wherein said hollow section is formed such that a front end of said shaft member is disposed at an inner bottom part of said hollow section said hollow section containing a member that varies volume or affinity by an external optical, thermal, or electrical stimulus.