plethysmometry

pleth·ys·mom·e·try

(pleth-iz-mom'ĕ-trē), Measuring the fullness of a hollow organ or vessel, as of the pulse. [G. plēthysmos, increase, + metron, measure]

pleth·ys·mom·e·try

(pleth'iz-mom'ĕ-trē) Measuring the fullness of a hollow organ or vessel, or of the pulse. [G. plēthysmos, increase, + metron, measure]