Microphonic Manometer for Indirect Determination of Systolic Blood Pressure in the Rat.

Publisher Website
Google Scholar
Abstract
A method of obtaining systolic blood pressure in the rat was devised which is similar in principle to the indirect measurement of blood pressure in man. The tail of a rat is led through a pressure cuff and a carbon microphone is placed in contact with the tail immediately distal to the cuff. To the microphone is connected a proper amplifying system to which earphones are attached. Where the arterial pulsations pass the cuff pressure one immediately hears the sounds of the pulse transmitted. The rhythm is distinctive from all other extraneous sounds. Measurements of blood pressure may be made in this manner rapidly and successively at intervals of 15-30 secs. This apparatus is especially valuable in determining pressures following the admn. of vasoconstrictor substances in the rat, as well as in a wide variety of expts. in which blood pressure detns. are required.

This publication has 3 references indexed in Scilit: