Medical device magnetic guidance/position detection system

A medical-device magnetic guiding and position detecting system comprising:

• a medical device disposed in the body of a subject, the medical device including at least one magnet and a circuit including an internal coil;
• a first magnetic field generating unit for generating a first magnetic field;
• position detecting means for detecting an induction magnetic field induced in the internal coil due to the first magnetic field;
• at least one pair of opposing coils for generating a second magnetic field that acts on the at least one magnet;
• and
• a switching unit electrically connected to the at least one pair of opposing coils;
• wherein the switching unit is in a disconnecting mode only when the position detecting means detects the position of the internal coil.

A medical-device magnetic guiding and position detecting system comprising:

• a medical device disposed in the body of a subject, the medical device including at least one magnet and a circuit including an internal coil;
• a first magnetic field generating unit for generating a first magnetic field;
• position detecting means for detecting an induction magnetic field induced in the internal coil due to the first magnetic field;
• and
• at least one pair of opposing coils for generating a second magnetic field that acts on the at least one magnet;
• wherein the opposing coils forming each of the at least one pair are driven in parallel.

A medical-device magnetic guiding and position detecting system comprising:

• a medical device disposed in the body of a subject, the medical device including at least one magnet and a circuit including an internal coil;
• a first magnetic field generating unit for generating a first magnetic field;
• position detecting means for detecting an induction magnetic field induced in the internal coil due to the first magnetic field;
• at least one pair of opposing coils for generating a second magnetic field that acts on the at least one magnet;
• and
• an element having an impedance lower than an impedance of one of the opposing coils forming each of the at least one pair at least at a frequency of the first magnetic field, the element having an impedance higher than an impedance of the other opposing coil at least at a frequency of the second magnetic field;
• wherein the opposing coils forming each of the at least one pair form a series-connected circuit, and one terminal of the element is connected to a point between the opposing coils of each of the at least one pair, and the other terminal of the element is connected to ground.