Noninvasive measuring method and device for pressure in blood vessels

Abstract

The invention relates to a method for utilizing a hydromechanics emulation technique to noninvasively measure the pressure in the blood vessels of a sick body before and after an operation in biomedicine. The invention aims to utilize the hydromechanics emulation technique to acquire the pressure in the blood vessels under a noninvasive condition by emulating the inner flow of the blood vessels so as to assess the pressure in the vein and / or artery before the operation. Compared with the pressure in the blood vessels measured according to the prior pressure-measuring method, the pressure in the blood vessels measured according to the emulation method provided by the invention has the advantages that the pressure in the blood vessels, such as the portal vein, is acquired under the noninvasive condition, and a brand new noninvasive measuring method and idea are initiated. The method provided by the invention is a noninvasive pressure-measuring method, so that the bleeding risk of preoperative puncture pressure measurement is avoided. A computer imaging technique is utilized to convert a pure data model into a three-dimensional imaging data model, so that a patient can conveniently access and input data and the method has the characteristics of simpleness, convenience and high speed.

Description

technical field [0001] The invention relates to a method for non-invasively measuring the internal pressure of blood vessels of a diseased body before and after operation in biomedicine by using fluid mechanics simulation technology. In particular, it relates to a method for non-invasively measuring the internal pressure of blood vessels by means of computer simulation software. Background technique [0002] Now take liver cirrhosis and portal hypertension as an example to illustrate the importance and application value of the present invention. Liver cirrhosis and portal hypertension have a high incidence of hepatitis B in my country, which seriously threatens human health. Among them, a large part of patients will develop cirrhotic portal hypertension, leading to the biggest cause of death in patients with cirrhosis and portal hypertension, which is the increase of portal vein pressure, which eventually causes rupture and bleeding of gastric esophageal varices. The curre...

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Problems solved by technology

4) Portal pressure gradient (HPVG), but the above methods require preoperative puncture pressure measurement, which has the risk of bleeding

The determination of this method is: the accuracy is poor, it can only be used as a qualitative diagnosis of portal hypertension, and it has not become a commonly used pressure measurement method in the world

2. Use the pressure sensor under the gastroscope to measure the adherent pressure of gastric esophageal varices. The disadvantage of this method is that it cannot eliminate the influence of blood vessel wall tension on the adherent pressure measurement, and the stability of the sensor is poor, which is easily affected by the operator's technique during inspection. level, patient heartbeat, respiration, swallowing, and effects of applied pressure

3. Using B-ultrasound to measure portal vein velocity, flow rate and splenic vein pulsation index PI is correlated with portal vein pressure, but due to the large dispersion of data, it cannot be used to predict the value of individual portal vein pressure

Therefore, at present, non-invasive portal pressure measurement is still in the laboratory stage, and there is no recognized accurate prediction method

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