- In the proposed hypothesis, a momentarily higher heat transfer window will be created using localized cooling of a small section of the skin over the superficial blood vessel (minimally contact) and hence, the warming process will be tracked using a non-contact and non-invasive IR temperature sensor. With the formation of plaques in the arteries at main aorta, carotid bifurcation or anywhere in the vessel, the flow turns into chaotic turbulent kind or in the case of blockage a very low or no blood flow, which impacts the heat transfer from the blood flow and can be easily detected from the heat transfer over the skin during that momentarily higher heaty transfer window.