[Measurement of blood pressure during induced hypotension (author's transl)]

A study was made of the reliability and accuracy of various methods of measuring the blood pressure during otorhinolaryngological and cardiac surgical operations in induced hypotension. The values obtained by indirect methods were generally higher than those measured with invasive techniques. In some cases the Riva-Rocci-Korotkoff method proved unreliable whereas the ultrasonic Doppler technique remained accurate also in the hypotensive range. Since, however, it does not allow continuous registration, invasive techniques are preferable for continuously monitoring the blood pressure during induced hypotension.