VitreOx™: A Super-hydrophilic Thin Fluid Film Device (TFFD™) Medical Accessory to Eliminate Fogging on Surgical Lenses

A.J. Orr, C.F. Watson, N. Herbots, E.J. Culbertson, A.J. Acharya, S.D. Whaley, M. Matiski, R.B. Bennett-Kennett, A.M. Murphy
Arizona State University/SiO2 Nanotech, LLC., US

Keywords: fogging, optic, optical, lenses, anti fog, surgery, medical device accessory, emulsion, hydro-affinity, hydrophilic, hydrophobic, SiO2, scope, infection prevention, scarring, closed body cavity surgery, condensation, bodily fluids, laparscopy, endoscopy, arthroscopy, wetting, goggles, vision wear, humidity, polymeric mesh, droplets, 3D, thin film growth mode, fluids, Volmer-Weber, thin fluid films, Frank Van der Merwe

Summary:

Surgical grade lenses in laparoscopes and arthroscopes fog during surgery, due to high humidity and temperature in body cavities in relation to the operating room. Fogging completely obscures the surgeon’s vision, so the scope must be repeatedly removed, cleaned, and reinserted before surgery can continue, increasing surgery duration, frustrating the surgeon, and increasing potential for infection and scarring due to air exposure from repeated removal and reinsertion of the scope. Current methods to address fogging introduce other complications: thick gels distort the surgeon’s view, alcohol-based solutions are too acidic for contact with tissue and quickly evaporate, and many require re-heating or re-application of the product every 5 to 20 minutes. Our anti-fogging solution is an ophthalmological, bio-compatible, pH neutral (7.2-7.4) emulsion called VitreOx™ that overcomes all of these shortfalls. By applying VitreOx™ on the otherwise hydrophobic surface of a lens, it is rendered super-hydrophilic, causing the water film to nucleate rapidly via the Frank Van-der-Merwe growth mode. The resulting flatter droplets form a two dimensional film through which light does not scatter, thereby preventing fogging on any surface to which the emulsion is applied.