A New Physical Model and Anti-Fog Technology for Undistorted Visualization through Endoscope Lenses using Sterile, Benign, Hyper-Hydrophilic Gel Coatings to Planarize and Absorb Condensing Water
ORAL
Abstract
Fogging is due to discontinuous 3D films formed by (hemi-) spherical drops refracting light.
The present anti-fog model and technology, KnoxFog™, uses hyper-hydrophilic [1] coatings. Hyper-hydrophilicity combines super-hydrophilicity [2-4] with "absorbing nanopores".
Super-hydrophilicity condenses water into continuous, flat, clear 2-D film [2] . Absorbing nanopores consist of a uniform hydrophilic network of nanopores drawing molecules into the material, which evacuates condensating water by molecular absorption. Combining super-hydrophilicity with absorbing nanopores maintains condensating water films flat and uniform, free of optical distortion, and inhibits water runoff into large drops. Hyper-hydrophilicity impedes two types of droplet formation – fog and run-off.
Current anti-fog strategies are insufficient. Acidic and alcohol-based anti-fog solutions quickly evaporate. Heating endoscopes requires reheating every 5 to 40 min [2, 4-8].
Hyper-hydrophilic KnoxFog™ is applied as a solid gel via a small, sterile, reusable, applicator, ClearEndoscope™, and dries in seconds.
In vitro comparison with eight endoscopes shows imaging is fog-free for hours with KnoxFog™ vs bare lenses, lens heating and other anti-fogs.
*Funding by Infinitum BioMed LLC, SiO2 Innovates LLC, and UV One Hygienics Inc. are here gratefully acknowledged.
Publication: [1] Herbots, N., Russell-Hill, M.I., Suppes, D.D.,
FOG ELIMINATION SYSTEMS FOR ENDOSCOPIC LENSES, INCLUDING SURGICAL SCOPES, STERILIZING APPLICATORS AND ANTI-FOG COATINGS
US Patent Pending (2023)
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AN EXPERIMENTAL STUDY AND MODELING OF WATER CONDENSATION TO ELIMINATE FOGGING ON ENDOSCOPE LENSES, USING NEW HYPER-HYDROPHILIC COATINGS CALLED KNOXFOGTM
to be submitted to BioInterphases, J. of Biomaterials and Biological Interphases, publ. by the American Vacuum Society, AIP (2023)
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FUNDAMENTALS OF ANTIFOGGING STRATEGIES, COATING TECHNIQUES AND PROPERTIES OF INORGANIC MATERIALS; A COMPREHENSIVE REVIEW
Journal of Materials Research and Technology, Volume 23, 2023, Pages 687-714,
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Presenters
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Visweshwar G Swaminathan
- Arizona State University