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95 results about "Aorta aortic" patented technology

Method and device for estimating pulse pressure of central aorta by using pressure pulse wave vibration signals of tourniquet

The invention discloses a method for estimating pulse pressure of a central aorta by using pressure pulse wave vibration signals of a tourniquet. The method comprises the steps of (I) providing an equation for estimating the pulse pressure of the central aorta; (II) measuring the pressure pulse wave vibration signals in the tourniquet, wherein the pressure pulse wave vibration signals comprise brachial artery systolic pressure, brachial artery diastolic pressure and the pressure pulse wave vibration signal waveforms in the tourniquet; (III) averaging the pressure pulse wave vibration signal waveforms and carrying out correction by using the systolic pressure and the diastolic pressure; (IV) analyzing the corrected pressure pulse wave vibration signal waveforms to obtain a plurality of characteristic signal values, wherein the characteristic signal values are independent estimating variables of the equation of the step (I); (V) substituting the numerical value of the estimating variables into the equation for estimating the pulse pressure of the central aorta to obtain the pulse pressure of the central aorta. The invention further provides a device for estimating the pulse pressure of the central aorta by using the pressure pulse wave vibration signals of the tourniquet by using the method.
Owner:FARMAR LICENSING

Method and device for detecting coronary artery stenosis functional ischemia based on FFR

The invention discloses a method and device for detecting coronary artery stenosis functional ischemia based on FFR. The method comprises the following steps: constructing a three-dimensional structure of coronary artery, and determining the characteristic parameter corresponding to each sub-virtual coronary artery in a virtual coronary artery; determining a pressure difference between the inlet pressure of the sub-virtual coronary artery and the outlet pressure of the sub-virtual coronary artery under a congestion state based on the characteristic parameter, and determining the congestion average pressure of a virtual aorta corresponding to the virtual coronary artery under the congestion state; and calculating the fractional flow reserve of the sub-virtual coronary artery based on the pressure difference of each sub-virtual coronary artery and the congestion average pressure of the virtual aorta, and analyzing functional ischemia caused by the sub-virtual coronary artery stenosis based on the fractional flow reserve of each sub-virtual coronary artery. Visibly, implementation of the method can improve the determination accuracy of the fractional flow reserve (FFR) and reduce thedetermination duration so as to improve the detection accuracy and reduce the detection duration for functional ischemia caused by coronary artery stenosis.
Owner:唯智医疗科技佛山有限公司

Method for determining patient-specific blood vessel information

The present invention relates to a method for determining patient-specific blood vessel information. More specifically, the present invention relates to a method for determining patient-specific cardiovascular information by applying a simplified coronary circulation model thereto. Furthermore, the present invention relates to a method for determining a blood flow rate for branches of a blood vessel having originated from an artery of each patient. According to the present invention, the method for determining cardiovascular information by using a computer system comprises the steps of: receiving image data including a plurality of coronary arteries having originated from the aorta; processing the image data so as to generate a three-dimensional shape model of the plurality of coronary arteries; simulating a blood flow for the generated three-dimensional shape model of the plurality of coronary arteries; and determining a fractional flow reserve (FFR) of the respective coronary arteries with the blood flow simulation result. In the blood flow simulation step for the three-dimensional shape model of the plurality of coronary arteries, a computational fluid dynamics model is applied to the three-dimensional shape model of the coronary arteries, and a centralized parameter model to be combined with the computational fluid dynamics model uses a simplified coronary circulation model including coronary arteries, capillaries of the coronary arteries, and coronary veins.
Owner:KNU IND COOPERATION FOUND

Coronary artery segmentation method and device

The invention provides a method and a device for dividing a coronary artery. The method comprises the following steps: (1) determining the position of an aorta in an original image, and performing reinforced filtering on the original image, thereby obtaining a reinforced filtered image; (2) obtaining the starting areas of a left coronary artery and a right coronary artery according to the position of the aorta, the original image and the gray scale of the reinforced filtered image; (3) dividing the reinforced filtered image based on at least one preset dividing threshold, obtaining a candidate area which corresponds with the preset threshold, and determining the candidate areas of the left coronary artery and the right coronary artery according to the candidate area and the starting areas of the left coronary artery and the right coronary artery; and (4) according to the position relationship between the aorta and the candidate areas of the left coronary artery and the right coronary artery, respectively screening the candidate areas of the left coronary artery and the right coronary artery, connecting the screened candidate areas with the starting areas, and obtaining the left coronary artery and the right coronary artery. The method and the device provided by the technical solution of the invention can wholly, accurately and automatically extract the left coronary artery and the right coronary artery, thereby facilitating qualitative and quantitative analysis and treatment for diseases of angiocardiopathy by a doctor.
Owner:SHANGHAI UNITED IMAGING HEALTHCARE

Heart valve stent and heart valve prosthesis

PendingCN111053629APrevent weekly leakagePrevent conduction blockHeart valvesAorta aorticAtrioventricular heart block
The invention discloses a heart valve stent and a heart valve prosthesis. The heart valve stent comprises a stent main body, which comprises mutually connected grid structure units, wherein the stentmain body is divided into an inflow channel, a transition section and an outflow channel in the axial direction, the inflow channel, the transition section and the outflow channel are connected in sequence, the stent further comprises a limiting structure connected with the stent main body, and the limiting structure is distributed on the outflow channel or the transition section in the circumferential direction, and is provided with a first projection part for limiting the stent from moving from the inflow channel to the outflow channel. According to the invention, the limiting structure is arranged on the outflow channel of the stent, so that the stent can be prevented from moving towards the outflow channel under the scouring of blood flow; the inflow channel of the stent is arranged toadapt to the shape of the native tissue, and the outer skirt edge is arranged in the circumferential direction of the outer side of the inflow channel at the position attached to the native tissue, so that perivalvular leakage can be effectively prevented while the valve is prevented from moving towards the inflow channel; and the size of the inflow channel of the stent can be small so as to effectively prevent atrioventricular block, and the size of the outflow channel can be small so as to reduce the compression on the aorta.
Owner:SHANGHAI MICROPORT CARDIOFLOW MEDTECH CO LTD
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