Landgraf et al reported “differences” between 2 blood pressure values measured simultaneously in a group of subjects. Their concept is that there is a valid way to compare auscultatory estimates of blood pressure with oscillometric values estimated by an automated monitor. We are all familiar with differences between 2 observers’ estimates from simultaneous auscultation of exactly the same K sounds when using a double-headed stethoscope. The concept that there is an “oscillometric blood pressure value” is inherently flawed. The device takes oscillations transmitted from the artery and uses the cuff as a transducer. The signals detected by the cuff are processed in the device software by an algorithm, which is always proprietary and unique to each manufacturer. Thus, device number 1 by manufacturer A will give one blood pressure value, while device number 2 (provided with the identical oscillations) by manufacturer B will display another BP estimate. There is no gold-standard oscillometric blood pressure value against which to compare anything. There can be no scientific study that is generalizable from one device to another. The results, discussion, and conclusions reached by Landgraf et al ¹ are of no meaning except to 1 specific monitor and possibly not even to another monitor of the same model from the same manufacturer.