title: Modelling and design of a capacitive touch sensor for urinary tract infection detection at the point-of-care.
abstract: Due to great use of touchscreens in mobile telephones and other electronic devices, there has been great evolution in this technology. Its wide applicability makes the touch sensor technology suitable for detection of specific components in urine, responsible for urinary tract infection (UTI). Integration of a touch sensor in a disposable probe tip to be used in UTI detection represents a powerful tool to develop new point-of-care testing (POCT) devices. The simplified structure of an electrodes array touch screen was simulated using the software COMSOL Multiphysics to prove that capacitive based touch screens can be used for detection of UTI. Besides we assumed presence of E.coli, one of the major causes of UTI urine. Results show that global capacitance increases if an E.coli sphere is present near the active electrodes, remaining approximately constant when further apart electrodes are excited. The output simulated voltage varies according to the capacitance value, decreasing when the capacitance is increased.
authors.forename: Cátia
authors.initials: C
authors.lastname: Barbosa
authors.forename: Tao
authors.initials: T
authors.lastname: Dong
mesh_terms: D001331:Automation; D040421:Cell Phone; D003198:Computer Simulation; D025802:Electric Capacitance; D004566:Electrodes; D004581:Electronics; D004867:Equipment Design; D004926:Escherichia coli; D006801:Humans; D019095:Point-of-Care Systems; D012984:Software; D017971:Tin Compounds / Q000737:chemistry; D014110:Touch; D014552:Urinary Tract Infections / Q000175:diagnosis* / Q000382:microbiology; D014584:User-Computer Interface
chemical_list: D017971:Tin Compounds; C109984:indium tin oxide