A New Simple Method for Indirect Determination of Blood Pressure in the Rat.

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Abstract
The tail of a previously warmed animal vibrates until a cuff placed at its base is inflated beyond the systolic pressure. When the cuff pressure is reduced, the vibrations reappear at the systolic end-point and they become more vigorous as zero pressure is approached. The accuracy of the method (in normotensive and hypertensive rats) was checked by measurements made with three other methods including direct aortic pressure. This [image]visual[image] method cannot be used in the presence of peripheral vasoconstriction such as is induced by epinephrine.