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Numerous medical devices used in laparoscopy and endoscopy rely on wall forces to direct the probe tip around curved interior surfaces.
Although such devices are less invasive than open surgery, they can potentially injure delicate wall surfaces.
The present idea is to guide a serpentine probe
around interior curves using externally-positioned magnetic fields (probably electromagnets with adjustable current.)
The probe tube itself would be composed of a series of annular rings (or a coil like a Slinky(tm)) of suitable magnetic material, which would group together in the presence of a magnetic field, causing bend to occur in the tube, radius dependent on the applied field. Near the magnet, the rings would group together; at the far side, the rings would be spaced further apart, resulting in a curvature controllable by the applied field.
For instance, to navigate an artery, curves would be introduced by externally applied magnets to prevent the probe tube from applying force to the walls of the artery.
Appropriate imaging could interact with the fields applied.
Remote magnetic navigation
http://en.wikipedia...magnetic_navigation
[xaviergisz, Sep 17 2012]
Gastro_20Slalom_20Race
keep away from magnets! [xenzag, Sep 18 2012]
[link]
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How is the field focussed to sustain the
complex path as the device is inserted? It's
not just a matter of guiding the tip. |
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Also, there may be significant localised
heating. |
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The idea implies the creation of a 4-D "path"
through which the probe can self-navigate.
We consider that this is beyond the
capabilities of your primitive technology. |
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(+)
If this existed I might still have a controlable gag reflex. |
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//How is the field focused (sp) to sustain the complex path as the device is inserted? // |
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Multiple external DC magnets control each point of inflection. |
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//Also, there may be significant localised heating.// |
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The idea implies the creation of a 4-D "path" through which the probe can self-navigate. We consider that this is beyond the capabilities of your primitive technology. |
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Aw, c'mon! The entire Halfbakery is beyond our ... technology! That's the entire point! |
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I'm gonna have to fishbone this for fear of what they might
do with it at Guantanamo. |
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Expand the intestine by blowing air to cause a slight inflation of the wall of the bowel immediately in front of probe. |
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Oh yeah. Let me leave the room before the probe is withdrawn. |
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