METHOD AND DEVICE FOR MEASURING RESTRICTION OF FLUID MEDIUM FLOW IN VESSEL Russian patent published in 2015 - IPC A61B5/215 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical diagnostics. Method of determining degree of vessel narrowing contains stages at which obtained are: sequence of first pressure measurements P₁ and sequence of respective first rate measurements U₁ in first location inside vessel, sequence of second pressure measurements P₂ and sequence of respective second rate measurements U₂ in second location inside vessel. Wave rate c in fluid medium is determined for each location depending on square of pressure change divided by square of respective rate change. For first location change of direct pressure is determined depending on the sum of pressure change and rate change. For second location change of direct pressure is determined depending on the sum of pressure change and rate change. Reserve of separated direct flow, representing drop of pressure through target area is determined, with said drop of pressure indicating degree of local narrowing or compression of vessel between said first location and second location. Device for determining degree of vessel narrowing is described.

EFFECT: inventions provide measurement of localised flow restriction.

14 cl, 6 dwg