A IMPROVED SYSTEM FOR MEASURING APPARENT VISCOSITY FUNCTION OF NON-NEWTONIAN FLUIDS
一种改进型体液表观粘度函数测量仪

Based on the rheological theory, a new clinical system for fast measuring the apparent viscosity of non-Newtonian fluids, including blood, as a function of shear rate, has been developed.Substituted for the pressure transduce used in L-l type viscometer developed by us before, a array of photo-diode and a signal processing unit containing a A/D converter served to measure and calculate the apparent viscosity.The experimental results showed this instrument maintains the advantage of L-l type, which can obtain the apparent viscosity as a function of shear rate coveing a wide range by a single run, but can eficiently work when the shear rate in the specimen is too low to be measured with conventional viscometer. Result are reproducible, especially at low shear rate about 0.1 sec, to 5%. This system is easy to be used for a technician without specialized training and needs less than 2ml of specimen for a test.