Magnetic throttling and control: magnetic control
Apparatuses and systems for enabling electrical communication with a device positionable within a body cavity of a patient. Apparatuses and systems for magnetically positioning a device within a body cavity of a patient. Medical devices. Methods of use.
1. An apparatus comprising:
a platform configured to be magnetically coupled to an object disposed within a body cavity of a patient through a tissue, the platform comprising:
a first magnet having a first end, a second end, and a first longitudinal axis extending through the first and second ends, the first magnet further having a first direction of magnetization;
a second magnet having a first end, a second end, and a second longitudinal axis extending through the first and second ends that is parallel to the first longitudinal axis, the second magnet further having a second direction of magnetization opposite the first direction of magnetization;
a platform member coupled to the first magnet and the second magnet; and
a third magnet having a substantially rectangular cross-sectional shape in a plane that is substantially parallel to the third direction of magnetization, the third magnet disposed between the first and second magnets and having a third direction of magnetization that is fixed relative to the platform member and more perpendicular than parallel to each of the first and second directions of magnetization;
where the platform is configured to permit the third magnet to be moved relative to the first and second magnets, in a direction parallel to the first and second longitudinal axes, between any of a plurality of positions at which the third magnet is disposed between the first and second magnets.
2. The apparatus of claim 1 , where:
the first magnet comprises an N pole and an S pole;
the second magnet comprises an N pole and an S pole;
the third magnet comprises an N pole and an S pole;
the N pole of the first magnet is coupled to the N pole of the third magnet; and
the S pole of the second magnet is coupled to the S pole of the third magnet.
3. The apparatus of claim 2 , where the position of the third magnet is adjustable relative to the first and second magnets.
4. The apparatus of claim 1 , where
the first longitudinal axis is parallel to the first direction of magnetization;
the second longitudinal axis is parallel to the second direction of magnetization;
a longitudinal dimension of the first magnet is greater than any dimension of the first magnet that is taken along a line that is perpendicular to the first longitudinal axis; and
a longitudinal dimension of the second magnet is greater than any dimension of the second magnet that is taken along a line that is perpendicular to the second longitudinal axis.
5. The apparatus of claim 4 , further comprising the object configured to be inserted within a body cavity of a patient and magnetically coupled to the platform across a tissue, the object having a fourth magnet that has an N pole and an S pole along an axis that is more perpendicular to than parallel with the first longitudinal axis of the first magnet of the platform.
6. The apparatus of claim 1 , further comprising the object configured to be inserted within a body cavity of a patient and magnetically coupled to the platform across a tissue, the object having a single fourth magnet that has an N pole and an S pole along an axis that is more perpendicular to than parallel with the first longitudinal axis of the first magnet of the platform.