"This electronic system is designed to wirelessly deliver hemodynamic data, including arterial pressure, pulse, and flow, to an external ... up to 3.5 cm (1.4 in) through blood, and 5.5 cm ...

(G) Schematic of the flow through a constriction followed by ... Boutry et al, Biodegradable and flexible arterial-pulse sensor for the wireless monitoring of blood flow, Nature Biomedical ...

The pulse here is from blood flow to the popliteal artery, a vital blood supply to the lower leg. Several medical conditions can affect blood flow to and from the popliteal pulse. For this reason ...