The device includes a fixed external cylinder, an internal freely floating cylinder, and a thermostat. The system for measuring and recording signals, cylinder rotational speed and momentum comprises a digitizer, a display unit, a computer with a sound card and a modulator, which provides connection of the digitizer to the computer and delivers the modulated signal to the sound card.

The developed device and methods extend the functional capabilities of an AKR-2 production viscosimeter used in the clinical practice and in research laboratories, which is achieved by the recording and processing of experimental data for dynamic deformation modes under a stepwise change in shear rate. At a given shear rate, the device measures changes in the transient tangential stress under the stepwise increase or decrease of shear rate. The use of the steady-state values makes it possible to determine the viscosity of the tested material. The dynamics of variations in transient tangential stresses allows the characteristic relaxation and aftereffect times to be obtained, which can be used in rapid blood tests. The proposed device can be used in clinical practice for performing different rapid tests. The static parameters of the AKR 22 device remain unchanged.