A surrogate arm for evaluating the accuracy of instruments for indirect measurement of blood pressure.
A surrogate arm, containing an artificial artery, has been developed for evaluating the accuracy of automatic, non-invasive, blood-pressure measuring devices. The surrogate arm produces all of the events associated with the auscultatory and oscillometric methods of measuring blood pressure. The surrogate arm includes a flat artificial artery in a plastic cylindrical chamber, 30 cm in circumference and 25 cm long, that contains an air/water mixture that allows matching the compliance of the human arm. Linear regression lines were obtained to correlate the indirectly (y) and directly (x) measured pressures. For auscultatory systolic pressure y = 1.01x - 1.60, with a correlation coefficient of 0.99. For mean oscillometric pressure y = 1.00x + 0, with a correlation coefficient of 1.00. For phase IV auscultatory (diastolic) pressure, y = 1.02x - 1.40, with a correlation coefficient of 0.96. For phase V auscultatory (diastolic) pressure y = 0.79x + 10.9, with a correlation coefficient of 0.98.
Yong
P
P
Hillenbrand Biomedical Engineering Center, Purdue University, West Lafayette, Indiana 47907.
Geddes
L A
LA
D001132:Arm; D001795:Blood Pressure Determination / Q000295:instrumentation*; D003187:Compliance; D004867:Equipment Design / Q000592:standards; D005260:Female; D006801:Humans; D008297:Male; D008955:Models, Cardiovascular; D008961:Models, Structural; D012016:Reference Values