Abstract: The invention relates to ex-situ biosensors that impedimetrically detect one or more target biomarkers of interest in bodily fluid sample derived from a patient. The biosensors include a multi-array of conducting material, such as platinum wires, having immobilized thereon antibody and/or aptamer that is selected to specifically and selectively bind to the one or more target biomarkers of interest. The biosensors are contacted with a portion of the bodily fluid sample, and the antibody and/or aptamer binds to the target biomarker(s) of interest in the bodily fluid sample. As a result, an electrochemical impedance signal is generated and therefore, a change in the electrochemical impedance is indicative of the presence of the target biomarker(s) of interest in the bodily fluid sample. The biosensors are point-of-care, on-demand devices that can be used in a medical environment, as well as in domestic and health emergency settings.