Cleaning method for prepless colonoscopy
Methods for clearing of fecal matter the wall of a colon or other body lumen for diagnostic inspection, the methods being adapted to clearing of fecal matter comprised of particles of various sizes and compositions. Methods are further adapted for application in patients who have undergone a restricted scope of preparation to reduce and/or remediate the particle structure of colon contents, or no preparation at all, before diagnostic inspection.
1. A channel for evacuating fecal waste from a human colon, comprising:
a lumen, sized for insertion of a distal end thereof to a distal end of said colon;
said lumen having a lobed cross-section comprising at least a first and second lobe;
a passage between said first and second lobes comprising at least one slot narrower than the widest extent of the cross-section of said first lobe;
said first lobe having a cross-sectional area at least 4 times larger than the cross-sectional area of said second lobe; and
wherein fluid between said first and second lobe is gated by a one-way valve member extending along said slot.
2. The waste evacuation channel of claim 1 , wherein said channel is enclosed by a wall constructed to resist collapse under application of a pressure differential of at least 0.2 Atm lower within the lumen than surrounding pressure.
3. The waste evacuation channel of claim 1 , wherein the valve member comprises a flap which extends to a proximal end of said slot, but terminates at least 1 cm before a distal end of said slot.
4. The waste evacuation channel of claim 1 , wherein the valve member resists passage of fluid into said second lobe under pressure from said first lobe, more than it resists passage of fluid from said second lobe to said first lobe under equivalent reversed pressure.
5. The waste evacuation channel according to claim 1 , wherein:
external access into said lumen at said distal end of said lumen is through at least one intake aperture and said at least one aperture is configurable from among a plurality of different sizes.
6. The channel of claim 5 , wherein the size of said aperture is configurable by adjustment while said lumen is inserted into said colon.
7. The channel of claim 6 , wherein said size of said aperture is configurable by adjustment of pressure at said distal end of said channel.
8. The waste evacuation channel according to claim 1 , wherein said second lobe comprises at least one groove.