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Calculation Method of Blood Flow Reserve Fraction

A technology of blood flow reserve fraction and calculation method, which is applied in the field of calculation of blood flow reserve fraction, can solve problems such as limited practical range, and achieve accurate results

Pending Publication Date: 2019-03-26
深圳市孙逸仙心血管医院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all obtain the value of FFR through intervention, the practical range is limited, and it brings great pain to the patient

Method used

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  • Calculation Method of Blood Flow Reserve Fraction
  • Calculation Method of Blood Flow Reserve Fraction
  • Calculation Method of Blood Flow Reserve Fraction

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the relative positional relationship, movement conditions, etc., the directional indication will also change accordingly, and the connection may ...

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Abstract

The invention provides a calculation method of blood flow reserve fraction, comprising the following steps: image acquisition: continuously acquiring a plurality of blood vessel images through a CT scanner; Establishing a first model: establishing a first model based on the plurality of blood vessel images; Determining a narrow segment: determining the narrow segment by the first model; Establishing a second model: eliminating a narrow segment of the first model; FFR calculation: that blood flow reserve fraction is calculate using the formula FFR=Pd / Pa, wherein Pd is the blood pressure of thestenosis segment in the first model and Pa is the blood pressure of the blood vessel correspond to the stenosis segment in the first model in the second model. The invention has the advantages of no need to use the medicine for dilating blood vessels in the process and no physiological trauma to the patient, and has the characteristics of safety, convenience, precision and the like.

Description

technical field [0001] The invention relates to the medical field, in particular to a method for calculating blood flow reserve fraction. Background technique [0002] Fractional Flow Reserve (FFR) is an index to evaluate the influence of coronary artery stenosis on vascular function. It refers to the ratio of the maximum blood flow that can be obtained under normal conditions theoretically in the myocardial region supplied by the coronary artery in the presence of stenosis. The normal epicardial coronary artery has very little resistance to blood flow, and the normal value of FFR is 1.0; when the value of FFR is less than 1.0, it indicates that there is stenosis in the current epicardial coronary artery. [0003] When FFR<0.75, the stenosis represented almost causes myocardial ischemia; when FFR≥0.75, the stenosis represented is less likely to cause myocardial ischemia. [0004] Traditionally, pressure wires were used to obtain pre- and post-stenosis blood pressure to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00A61B5/02
CPCA61B5/02G06T7/0012G06T2207/10081G06T2207/30104
Inventor 王小庆彭长农冼展超
Owner 深圳市孙逸仙心血管医院
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