Apparatus and method of assessing a narrowing in a fluid filled tube
AssigneesMedsolve Limited, Imperial College of Science, Technology and Medicine
InventorsHelen DAVIES, Justin DAVIES
Life of this patent
Estimating the term…
Abstract
An apparatus and method of assessing a narrowing in a fluid filled tube having a fluid flow pressure wave having a backward-originating pressure component and a forward-originating pressure component without taking a flow velocity measurement, comprising: taking pressure measurements in the tube; separating the pressure components into the backward-originating pressure component and the forward-originating pressure component; identifying a time window when the differential of flow velocity (dU) is minimal or absent; and deriving the backward and forward pressure components for pressure measurements taken in at least the time window.
Claims22
A system of assessing a narrowing in a blood vessel, the system comprising:
- at least one pressure-sensing probe sized and shaped for positioning within the blood vessel;
- and
- a processor in communication with the at least one pressure-sensing probe, the processor configured to:
- receive pressure measurements obtained by the at least one pressure-sensing probe positioned within the blood vessel not during hyperaemia;
- and
- calculate a pressure ratio using the pressure measurements obtained during a wave free period of a cardiac cycle, wherein the pressure ratio provides an assessment of a severity of the narrowing in the blood vessel.
Dependencies are inferred from the claim text.