VISCOSIMETER WITH TWO RISING TUBES AND ONE CAPILLARY TUBE (VARIANTS), METHOD FOR MEASURING VISCOSITY OF LIQUIDS (VARIANTS) Russian patent published in 2005 - IPC

FIELD: method and apparatus for measuring viscosity of liquids, namely "in vivo" measurements of blood viscosity of living beings in wide range of shear coefficients.

SUBSTANCE: system and methods provide monitoring of change of height of two moving in opposite directions blood columns of circulating blood of patient at known size of capillary tube in which blood flows and determination of blood viscosity in certain range of shear coefficients, namely at small shear coefficients. System includes set of tubes (for single or multiple use) having pair of rising tubes and one predetermined-size capillary tube mutually coupling two rising tubes and arranged between them (or forming part of one rising tube), valve mechanism for controlling flow of circulating blood from patient to rising tubes. Respective pickups provide monitoring of blood column motion in each rising tube. Microprocessor connected to said pickups performs analysis of said motions while taking into account size of capillary tube in order to determine viscosity of circulating blood of patient. In variant of invention only one blood column is monitored and simultaneously certain point along height of other blood column is detected. According to such data and size of capillary tube, viscosity of blood is determined.

EFFECT: improved design of apparatus, enhanced accuracy of measuring blood viscosity.

115 cl, 30 dwg