CAPSULE MEDICAL APPARATUS AND BODY-CAVITY OBSERVATION METHOD

摘要

A capsule medical apparatus includes a capsule housing (3) having a protruded portion on a long axis at one end. The protruded portion is on a straight line (lvm) connecting a center of buoyancy (Pv) and a center of gravity (Pm) when the capsule housing is in liquid (7) in a body cavity, and the protruded portion is formed so that at least one straight line is present which passes a point (Pf) at which buoyant moment produced by buoyancy acting on the center of buoyancy (Pv) and gravitational moment produced by gravity acting on the center of gravity (Pm) are balanced and which intersects perpendicularly with an outer surface of the protruded portion. The inclined posture allows the capsule housing to receive a large fluid resistance against the liquid (7). Moreover, the capsule endoscope (1) can easily move along the flow of the liquid (7) because the capsule endoscope (1) is in the point contact state with the inner wall surface (2a).