The Gus

Does anybody know a working proyect of a vascular or fetal doppler ??? or where to find 'em???? it can be use to listen the fetal heart beat or, for example, the sound of the blood and find an stop intravascular.... I have some info but not a circuit of it.... [move][glow=red,2,300]The Gus - From Argentina[/glow][/move]