CARDIO PNEUMOGRAPH

n. Ka3rd"i2 -o-mi2'mo-gra3f. From KapSia, the heart, TireC/ia, a breath, and ypa eiv, to write. An instrument devised by Landois for estimating the cardio pneumatic effect of the systole and diastole of the heart. It consists e entially of a tambour which is connected with a tube that is held between the lips. The slightest movements of inspiration and expiration are communicated to the sensitive drum and to a lever-index which registers the curves of variation upon a revolving cylinder. [K, 19.] [s. 88]