Cannulation of a nonpalpable artery with the aid of a Doppler monitor.
D000368:Aged; D001158:Arteries; D002404:Catheterization / Q000295:instrumentation* / Q000379:methods; D006225:Hand / Q000098:blood supply; D006621:Hip Joint / Q000601:surgery; D006801:Humans; D008297:Male; D010173:Palpation; D012039:Regional Blood Flow