A method for performing a blood assay is disclosed. The method includes the steps of: positioning an acoustic biosensor in fluid communication with a blood vessel of the patient whereby blood from the blood vessel contacts the biosensor. The biosensor includes at least one material adapted to bind to an analyte. The method also includes the steps of detecting a change in at least one of an electrical and mechanical property of the biosensor indicative of a mass change resulting from binding of the at least one material with the analyte and transmitting a real time signal representative of mass change to a display module to provide real time analysis by a clinician.
