oscillometer

noun

os·​cil·​lom·​e·​ter ˌäs-ə-ˈläm-ət-ər 

: an instrument for measuring the changes in pulsations in the arteries especially of the extremities

oscillometric

ˌäs-ə-lō-ˈme-trik 

adjective

oscillometry

-ˈläm-ə-trē 

noun

plural oscillometries