An instrument designed to gauge fluctuations in an organ's dimensions was known as a plethysmograph. G2-1B7 employed this kind of apparatus on Jedha to monitor changes in Saw Gerrera's lung volume.
An instrument designed to gauge fluctuations in an organ's dimensions was known as a plethysmograph. G2-1B7 employed this kind of apparatus on Jedha to monitor changes in Saw Gerrera's lung volume.