Question:

What are the disadvantages of using a von Recklinghausen oscillotonometer?

Answer:

An oscillotonometer is a manual device and is subject to observer bias. The onset of oscillations and maximum oscillations are better observed than the actual point of disappearance of oscillations. Therefore, the diastolic pressure is less accurate.

The operating mechanism involves manually inflating the cuff, slowly releasing the pressure in the cuff, observing the oscillations and then switching the lever between two cuffs to record the reading on the dial. With the introduction of microprocessors and automated devices, the oscillotonometer has disappeared from clinical use.