Objective:To analyze the reference value of photoplethysmogram on different positions of normal adults.Methods:To examine and analyze the photoplethysmogram of the cheeks,linguales,nail matrixes of ring fingers and cunkou(radial artery)of normal adults with BC-4 photoplethysmograph.Results:It is consistent the indexes of time reflecting cardiac pulsation and of specific value reflecting cardiac function on different positions.It is distinct from indexes of amplitude,angle,area and ratio reflecting the bloodflow on different positions.Conclusion:Photoplethy...