rheographyn.
/rɪˈɒɡrəfi/, U.S. /riˈɑɡrəfi/ Medicine and Physiology.
The measurement of blood flow, esp. (more fully impedance rheography) by using changes in the body's electrical impedance. Frequently with distinguishing word indicating the method used.
ΚΠ
1956 Cardiologia 29 161 Kaindl used this method [sc. impedance plethysmography] in clinical investigations under the name of rheography.
1960 Brit. Heart Jrnl. 22 140 Reography records the changes of electrical conductivity of the human body caused by the blood flow and is practically applicable to any part of the body.
1986 Angiology 37 124 The Travis Winsor index (evaluated by Doppler ultrasound) and the perfusion volume (evaluated by impedance rheography) were both significantly increased after treatment.
2002 Seminars Cutaneous Med. & Surg. 21 79/2 Photoplethysmography (PPG) and the minor variant of PPG known as light reflection rheography (LRR) measure changes in light absorption within dermal capillaries.
Derivatives
rheoˈgraphic adj. [after German rheographisch (1953 or earlier)] of or relating to rheography.
ΚΠ
1959 Confinia Neurologica 19 3 The optimal frequency for rheographic examination lies around 1,000 cps.
1978 Human Physiol. 4 390 (title) Rheographic study of the circulation in the lower limbs in health and disease.
2008 Neurosci. & Behavioral Physiol. 38 647 The rate of circulation, indicated by rheographic data, initially increased during hyperventilation.
This is a new entry (OED Third Edition, June 2010; most recently modified version published online March 2022).
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n.1956