noun. a tool for gauging and documenting volume or volume modifications in organs or body tissues, like the blood supply flowing throughout an organ.

PLETHYSMOGRAPH: "The plethysmograph shows an unheard of amount of circulation this soon after a surgical operation."
Cite this page: N., Pam M.S., "PLETHYSMOGRAPH," in, April 7, 2013, (accessed September 17, 2021).