Medical diagnostic devices for measuring oxidation reduction potential (ORP); medical devices, namely, oxidation reduction potential (ORP) diagnostic devices, namely, devices and disposable strips, sold as a unit, that measure in a bodily fluid sample oxidative stress in a patient; medical devices, namely, oxidation reduction potential (ORP) diagnostic devices, namely, bench-top devices and disposable strips, sold as a unit, that measure in a bodily fluid sample oxidative stress in a patient