Capsule medical device and medical system

A capsule medical device which is introduced into a subject and used therein, the capsule medical device comprising:

• a power supply unit;
• a capsule detection magnetic field generation unit configured to generate a capsule detection magnetic field, with which at least one of a position and a posture of the capsule medical device is detected outside the subject, upon receiving electric power provided by the power supply unit;
• a state detection unit configured to detect a state of the capsule medical device;
• and
• a control unit configured to control power supply from the power supply unit to the capsule detection magnetic field generation unit based on a detection result of the state detection unit,
• wherein the state detection unit includes a motion detector configured to detect motion of the capsule medical device,
• the motion detector is configured to detect a physical quantity corresponding to acceleration of the capsule medical device, and
• the control unit executes any one of reduction of the power supply provided to the capsule detection magnetic field generation unit and turning off of the power supply when the acceleration determined from a determination result of the motion detector is either equal to or more than a predetermined value or equal to or less than the predetermined value.

A capsule medical device which is introduced into a subject and used therein, the capsule medical device comprising:

• a power supply unit;
• a capsule detection magnetic field generation unit configured to generate a capsule detection magnetic field, with which at least one of a position and a posture of the capsule medical device is detected outside the subject, upon receiving electric power provided by the power supply unit;
• a state detection unit configured to detect a state of the capsule medical device;
• a control unit configured to control power supply from the power supply unit to the capsule detection magnetic field generation unit based on a detection result of the state detection unit;
• and
• a magnetic field response unit made of a magnetic member and configured to respond to a guiding-magnetic field which is a magnetic field applied from outside to the capsule medical device for guiding the capsule medical device,
• wherein the state detection unit includes:
• a guiding-magnetic field detector configured to detect the guiding-magnetic field;
• a motion detector configured to detect motion of the capsule medical device;
• and
• a comparison determination unit configured to compare a guiding-magnetic field detection result of the guiding-magnetic field detector and a motion detection result of the motion detector,
• wherein the control unit controls the power supply based on a result acquired by comparing the guiding-magnetic field detection result of the guiding-magnetic field detector and the motion detection result of the motion detector.

A capsule medical device which is introduced into a subject and used therein, the capsule medical device comprising:

• a power supply unit;
• a capsule detection magnetic field generation unit configured to generate a capsule detection magnetic field, with which at least one of a position and a posture of the capsule medical device is detected outside the subject, upon receiving electric power provided by the power supply unit;
• a state detection unit configured to detect a state of the capsule medical device;
• and
• a control unit configured to control power supply from the power supply unit to the capsule detection magnetic field generation unit based on a detection result of the state detection unit,
• wherein the state detection unit includes a distance acquiring unit configured to acquire a distance between the capsule medical device and the subject, and
• the control unit decreases the power supply provided to the capsule detection magnetic field generation unit when the distance is either equal to or more than a predetermined value or equal to or less than the predetermined value.

A medical system comprising:

• a capsule medical device which is introduced into a subject and is used therein, the capsule medical device including
• a power supply unit,
• a capsule detection magnetic field generation unit configured to generate a capsule detection magnetic field, with which at least one of a position and a posture of the capsule medical device is detected outside the subject, upon receiving electric power provided by the power supply unit,
• a state detection unit configured to detect a state of the capsule medical device, and
• a control unit configured to control power supply from the power supply unit to the capsule detection magnetic field generation unit based on a detection result of the state detection unit;
• and
• an external device provided outside of the subject, the external device including
• a capsule detection magnetic field detector configured to detect the magnetic field generated by the capsule detection magnetic field generation unit,
• a position and posture detection unit configured to detect at least one of the position and the posture of the capsule medical device based on the detection result of the capsule detection magnetic field detector, and
• a command information transmitting unit configured to transmit command information for controlling the power supply provided by the power supply unit, wherein the command information relates to the amount of the change of at least one of the strength and the direction of the guiding-magnetic field which is a magnetic field applied from outside to the capsule medical device in order to guide at least one of the position and the posture of the capsule medical device,
• wherein the state detection unit receives the command information transmitted from command information transmitting unit, and
• the control unit controls the power supply based on the command information received by the state detection unit.