Anti-fouling endoscopes and uses thereof
AssigneesPresident and Fellows of Harvard College, Beth Israel Deaconess Medical Center, Inc.
InventorsJoanna Aizenberg, Steffi Sunny, Nicolas Vogel, Adnan Majid, George Cheng, Michael Aizenberg
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Abstract
A transparent repellent, liquid-infused coating applied onto the distal end of an endoscope that prevents vision loss and reduces fouling is described. Also described is a disposable endoscope window that is coated in a transparent, repellant, liquid-infused coating for attachment to the distal end or distal window of an endoscope to obviate vision loss. Also described is an endoscope comprising a miniature camera coated in a transparent, repellent, liquid-infused coating.
Claims24
An endoscope, comprising:
- an insertion tube and a proximal body, the insertion tube starting from the proximal body and having a distal end;
- at the distal end of the insertion tube;
- an illumination source designed to project light from an illumination emitter at the distal end of the insertion tube, and an image collector designed to collect light to form an image of objects at the distal end;
- and
- a substrate designed to seal the distal end to exclude tissues and bodily fluids from interference with the image collector during endoscopy, the substrate designed to entrain a lubricating fluid on a wetting surface, the substrate, wetting surface, and lubricating fluid to form a protective and transparent window over the image collector, the wetting surface lying on the side of the substrate facing outwardly from the image collector into a cavity for examination by the endoscope,
- the wetting surface formed by deposition of silica particles or other inorganic oxide nanoparticles onto the substrate, followed by heating to form a porous solid, the substrate's wetting surface designed to entrain a lubricating fluid at the distal end of the insertion tube, the lubricating fluid being immiscible with the bodily fluids, the wetting surface being designed to present wetting to the lubricating fluid preferentially relative to the bodily fluids, the wetting surface and the wetting it presents being designed to entrain the lubricating fluid in a layer that is ultra-smooth, slippery, and optically transparent over the wetting surface during exposure to the tissues and bodily fluids.
An optically transparent article, comprising:
- a transparent substrate having a wetting surface designed to entrain a layer of a lubricating fluid on the wetting surface;
- the substrate being designed to be affixed to a distal end of an insertion tube of an endoscope, the shape and affixation of the substrate being designed to:
- form an operable endoscope tip with the distal end during endoscopy,
- seal to exclude tissues and bodily fluids from interference with an image collector of the endoscope during endoscopy, and
- present the substrate at the distal end with its wetting surface facing outwardly from the image collector into a cavity for examination by the endoscope;
- the lubricating fluid layer being immiscible with biological material and bodily fluids to which the endoscope distal end is to be exposed;
- the wetting surface designed to present high wetting to the lubricating fluid preferentially relative to bodily fluids to which the endoscope distal end is to be exposed, the wetting surface formed by deposition of silica particles or other inorganic oxide nanoparticles onto the substrate, followed by heating to form a porous solid designed to entrain the lubricating fluid in a layer to form an ultra-smooth, slippery, optically transparent layer over the wetting surface during exposure to the tissues and bodily fluids;
- the substrate, wetting surface, and lubricating fluid being designed to form a sealed, protective and transparent window over the image collector at the distal end of the endoscope.
Dependencies are inferred from the claim text.