Method of simulating valve assembly deployment and valve assembly release evaluation system

Abstract

The invention relates to a method for simulating expansion of a valve component and a valve component release evaluation system. The method for simulating expansion of the valve component comprises the following steps: S1, establishing a valve bracket model and a blood vessel model based on a valve bracket of the valve component and an image of a blood vessel of a patient; s2, a first coordinate of a stent control point of the valve stent model in the unfolded state is obtained, a second coordinate of the stent control point of the valve stent model in the compressed state is obtained based on the first coordinate and the nominal size of the valve stent after compression, and the stent control point is an intersection point of metal wires of the valve stent model; s3, based on the second coordinates, adjusting the valve stent model to a compressed state; s4, putting the valve stent model in a compressed state into a release position of the blood vessel model; and S5, based on the first coordinate, the second coordinate and the blood vessel model, obtaining a third coordinate of the stent control point expanded in the blood vessel model, and expanding the valve stent model in the compressed state at the release position according to the third coordinate.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a method for simulating the deployment of a valve component and a valve component release evaluation system. Background Art

[0002] Heart valve intervention refers to the operation of replacing the diseased valve with a valve component from the blood vessel. However, in actual surgery, it is difficult for doctors to predict the results of releasing the artificial valve in different positions, which leads to doctors spending a lot of time trying to adjust the valve release position, which makes the operation time too long and the prognosis worse. Summary of the invention

[0003] Based on this, it is necessary to provide a method for simulating the deployment of a valve component and a valve component release evaluation system to address the problem of deployment of the valve component in a blood vessel.

[0004] A method for simulating the deployment of a valve assembly, the method comprising:

[0005] S1. establishing a valve stent model and a blood vessel model based on an image of a valve stent of a valve assembly and a blood vessel of a patient;

[0006] S2, obtaining the first coordinates of the stent control points of the valve stent model in the expanded state, and obtaining the second coordinates of the stent control points of the valve stent model in the compressed state based on the first coordinates and the nominal size of the valve stent after compression, wherein the stent control points are the intersections of the metal wires of the valve stent model;

[0007] S3. Based on the second coordinate, adjusting the valve stent model to a compressed state;

[0008] S4, placing the valve stent model in a compressed state into the release position of the blood vessel model;

[0009] S5, based on the first coordinate, the second coordinate and the blood vessel model, obtaining a third coordinate of the stent control point after being deployed in the blood vessel model, and deploying the valve stent model in a compressed state at the release position according to the third coordinate;

[0010] S6. According to the relative positional relationship between the valve stent and the skirt and leaflet of the valve assembly, the skirt model and the leaflet model are unfolded in the valve stent model to obtain a simulated image of the unfolded valve assembly.

[0011] In one embodiment, it also includes:

[0012] S7, obtaining a distance distribution diagram of the valve stent model relative to the blood vessel model based on the simulated image of the valve assembly being deployed, and the user determines whether the release position of the valve stent model in step S4 is appropriate based on the distance distribution diagram.

[0013] In one embodiment, if the user determines in step S7 that the release position is inaccurate, the method further includes step S8:

[0014] S81, adjusting the release position in step S4;

[0015] S82, repeating steps S4 to S7 until the user determines in step S7 that the release position is accurate. In one embodiment, before step S5, step S41 is further included, in which the valve stent model in a compressed state is gradually unfolded, the stent control points are detected to touch the wall, and the wall-touching coordinates of some of the stent control points are obtained.

[0016] In one embodiment, in step S5, the third coordinate of each of the stent control points is obtained based on the first coordinate, the second coordinate, the wall-touching coordinate and the blood vessel model.

[0017] In one of the embodiments, based on the third coordinate, a Laplace deformation algorithm is used to control the valve stent model to be deployed at the release position.

[0018] In one embodiment, the method for unfolding the skirt model and the leaflet model in step S6 includes:

[0019] S61, extracting skirt control points of the skirt and leaflet control points of the leaflet based on the relative positional relationship among the valve support, the skirt and the leaflet;

[0020] S62, obtaining the positional relationship between the skirt control point and the stent control point, and the positional relationship between the leaflet control point and the stent control point;

[0021] S63. Map the skirt control points and the leaflet control points onto the deployed valve stent model to obtain the relative position of the deployed skirt model and the valve stent model, as well as the relative position of the leaflet model and the valve stent model, and draw the skirt model and the leaflet model to obtain a simulated image of the deployed valve assembly.

[0022] In one embodiment, step S2 comprises:

[0023] S21, extracting the skeleton structure of the valve stent model, identifying the intersection of the metal wires of the valve stent model, and using the intersection as the stent control point;

[0024] S22. Establish a spring mass point model of the stent control points according to the adjacency relationship of the stent control points in the expanded state of the valve stent model to obtain the first coordinate.

[0025] The present application also provides a valve component release assessment system, the valve component release assessment system comprising:

[0026] A processor configured to:

[0027] Establishing a valve stent model and a blood vessel model based on an image of a valve stent of a valve assembly and a blood vessel of a patient;

[0028] Acquire a mapping relationship between a stent control point of the valve stent model in an expanded state and a compressed state, wherein the stent control point is an intersection point of a metal wire of the valve stent model;

[0029] placing the valve stent model in a compressed state into the release position of the blood vessel model;

[0030] Based on the mapping relationship, the valve stent model simulating the compressed state is deployed at the release position;

[0031] According to the relative positional relationship between the valve stent and the skirt and leaflet of the valve assembly, the skirt model and the leaflet model are unfolded in the valve stent model to obtain a simulated image of the unfolded valve assembly;

[0032] A display is connected to the processor for displaying the simulated image.

[0033] In one of the embodiments, in response to the simulated state of the valve assembly after deployment not meeting set requirements, a recommended release position or prompt information is displayed on the display.

[0034] The above-mentioned method for simulating the deployment of the valve component, S1, establishes a vascular model based on the patient's vascular image, and establishes a valve stent model based on the valve stent image of the valve component; S2, obtains the first coordinates of the stent control points of the valve stent model in the deployed state, and obtains the second coordinates of the stent control points of the valve stent model in the compressed state based on the first coordinates and the nominal size of the valve stent after compression; S3, adjusts the valve stent model to a compressed state based on the second coordinates; S4, places the valve stent model in a compressed state into the release position of the vascular model; S5, based on the first coordinates, the second coordinates and the vascular model, obtains the third coordinates of the stent control points after deployment in the vascular model, and deploys the valve stent model in the compressed state at the release position according to the third coordinates; S6, adjusts the skirt model and the leaflet model to be deployed in the valve stent model according to the relative position relationship between the valve stent and the skirt and leaflet of the valve component, thereby obtaining a simulated image of the valve component deployed in the vascular model. The present application can obtain a simulated image of the deployment of the valve assembly through the above steps, which can help doctors predict the expansion process and results of the valve stent of the valve assembly after releasing the valve assembly at the release position, and can help doctors find the release position faster, improve surgical efficiency, and improve surgical prognosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A flow chart of a method for simulating deployment of a valve assembly provided in the present application.

[0036] Figure 2 This is a structural schematic diagram of the valve stent model provided in this application from the first perspective.

[0037] Figure 3 A structural schematic diagram of the valve stent model provided in this application from a second perspective.

[0038] Figure 4 This is a schematic structural diagram of the valve stent model provided in this application in a compressed state.

[0039] Figure 5 A schematic structural diagram of the valve stent model provided in the present application in a compressed state and arranged in a blood vessel model.

[0040] Figure 6 A schematic diagram of the structure of the valve stent model provided in the present application unfolded in a blood vessel model.

[0041] Figure 7 A schematic diagram of the structure of the valve component model provided in the present application unfolded in a blood vessel model.

[0042] In the figure:

[0043] 100. Valve stent model; 110. Stent control point;

[0044] 200, blood vessel model;

[0045] 300, skirt model;

[0046] 400. Leaflet model. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0048] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0053] The present application provides a method for simulating the deployment of a valve assembly, such as Figures 1 to 7 As shown, the method of simulating the deployment of a valve component includes:

[0054] S1, establishing a valve stent model 100 and a blood vessel model 200 based on an image of a valve stent of a valve assembly and a blood vessel of a patient;

[0055] S2, obtaining a first coordinate of a stent control point 110 of the valve stent model 100 in an expanded state, and obtaining a second coordinate of the stent control point 110 of the valve stent model 100 in a compressed state based on the first coordinate and the nominal size of the valve stent after compression, wherein the stent control point 110 is an intersection of metal wires of the valve stent model 100;

[0056] S3, adjusting the valve stent model 100 to a compressed state based on the second coordinate;

[0057] S4, placing the compressed valve stent model 100 into the release position of the blood vessel model 200;

[0058] S5, based on the first coordinate, the second coordinate and the blood vessel model 200, obtaining the third coordinate of the stent control point 110 after being deployed in the blood vessel model 200, and deploying the valve stent model 100 in the compressed state at the release position according to the third coordinate;

[0059] S6. According to the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, the skirt model 300 and the leaflet model 400 are unfolded in the valve stent model 100 to obtain a simulated image of the unfolded valve assembly.

[0060] The method for simulating the deployment of a valve component includes: S1, establishing a blood vessel model 200 based on a blood vessel image of a patient, and establishing a valve stent model 100 based on a valve stent image of the valve component; S2, obtaining a first coordinate of a stent control point 110 of the valve stent model 100 in a deployed state, and obtaining a second coordinate of the stent control point 110 of the valve stent model 100 in a compressed state based on the first coordinate and the nominal size of the valve stent after compression; S3, adjusting the valve stent model 100 to a compressed state based on the second coordinate; S4, adjusting the valve stent model 100 to a compressed state; The stent model 100 is placed at the release position of the blood vessel model 200; S5, based on the first coordinate, the second coordinate and the blood vessel model 200, the third coordinate of the stent control point 110 after being deployed in the blood vessel model 200 is obtained, and the valve stent model 100 in the compressed state is deployed at the release position according to the third coordinate; S6, according to the relative position relationship between the valve stent and the skirt and leaflet of the valve assembly, the skirt model 300 and the leaflet model 400 are adjusted to be deployed in the valve stent model 100, thereby obtaining a simulated image of the valve assembly deployed in the blood vessel model 200. The present application can obtain a simulated image of the deployment of the valve assembly through the above steps, which helps doctors predict the expansion process and results of the valve stent of the valve assembly after releasing the valve assembly at the release position, and can help doctors find the release position faster, improve surgical efficiency, and improve surgical prognosis.

[0061] It should be noted that the calibrated size refers to the nominal size of the material, and the calibrated size of the valve stent can be found through the manufacturer's instructions of the valve component.

[0062] It should be noted that the method for simulating the deployment of a valve component provided in the present application can be used before surgery to simulate the release position of the valve component in a vascular model and to input and output the following information: Figure 7 The image shown can be shown to a doctor or patient.

[0063] The method for simulating the deployment of a valve component provided in the present application can also be used during surgery. First, a valve stent model 100 and a blood vessel model 200 are established. Then, the valve stent model 100 is placed in a compressed state. During surgery, the doctor delivers the valve stent to the release position of the patient's blood vessel. The present application can obtain the current intraoperative image. Then, in the model, the valve stent model 100 in a compressed state is correspondingly set in the blood vessel model 200, and the relative positions of the valve stent model 100 and the blood vessel model 200 in the model match the relative positions of the valve stent and the blood vessel during surgery. Then, a simulated image of the deployment of the valve component is obtained by simulating the deployment of the valve component to predict whether the current release position during surgery is accurate.

[0064] In some embodiments, Figure 2 and Figure 3 As shown, step S2 includes:

[0065] S21, extracting the skeleton structure of the valve stent model 100, identifying the intersection points of the metal wires of the valve stent model 100, and using the intersection points as stent control points 110;

[0066] S22. According to the adjacency relationship of the stent control points 110 of the valve stent model 100 in the expanded state, a spring mass point model of the stent control points 110 is established to obtain a first coordinate.

[0067] The spring mass point model is established by the positional relationship between adjacent stent control points 110 of the valve stent model 100 in the expanded state, thereby obtaining the first coordinates. Then, the second coordinates are calculated based on the first coordinates and the calibrated dimensions.

[0068] It should be noted that setting up the stent control point 110 in step S21 means using the average curvature skeletonization algorithm to extract the center line (that is, the skeleton structure) of the valve stent model 100, identifying the location of the metal wire intersection based on the number of neighboring nodes of the center line node, and using the intersection as the stent control point 110.

[0069] It should be noted that the spring mass model is a method of simulating the deformation of an object using Newton's laws of motion. In this embodiment, establishing a spring mass model means taking the support control point 110 as a mass of unit mass, and the distance between the support control point 110 and the adjacent support control point 110 as the zero force length of the spring model to establish the spring mass model. The specific steps of establishing the spring mass model of the support control point 110 belong to conventional technical means in the field and will not be repeated here.

[0070] In some embodiments, Figure 4As shown, in step S3, based on the second coordinate, the Laplace deformation algorithm is used to control the valve stent model 100 to be deformed to a compressed state. The Laplace deformation algorithm can be used to transform the valve stent model 100 from an expanded state to a compressed state.

[0071] It should be noted that the Laplace deformation algorithm is common knowledge in the art, and the specific conversion steps will not be repeated here.

[0072] In some embodiments, Figure 4 and Figure 5 As shown, in step S4, the valve stent model 100 in a compressed state is placed in the blood vessel model 200 through rigid transformation. The valve stent model 100 in a compressed state is placed in the blood vessel model 200 through rigid transformation to prevent the valve stent model 100 from deforming when placed in the blood vessel model 200 and affecting the results of subsequent simulation images.

[0073] It should be noted that the image shape remains unchanged after translation and rotation, and the resulting transformation is called a rigid transformation;

[0074] In some embodiments, before step S5, step S41 is further included, in which the valve stent model 100 in a compressed state is gradually unfolded, the stent control points 110 are subjected to wall contact detection, and the wall contact coordinates of some stent control points 110 are obtained. The stent control points 110 are constrained so that the stent control points 110 are located in the inner cavity of the blood vessel model 200. During the unfolding process, the stent control points 110 are subjected to wall contact detection to obtain the wall contact coordinates of some stent control points 110 after they touch the wall.

[0075] It should be noted that the wall contact refers to the contact between the stent control point 110 and the inner wall of the blood vessel model 200 .

[0076] In a specific embodiment, the method for detecting wall contact includes: when the stent control point 110 contacts the inner wall of the blood vessel model 200, canceling the motion component of the stent control point 110 perpendicular to the blood vessel wall.

[0077] In some embodiments, Figure 6 As shown, in step S5, the third coordinates of each stent control point 110 are obtained based on the first coordinate, the second coordinate, the wall-touching coordinates and the blood vessel model 200. According to the first coordinate, the second coordinate, the wall-touching coordinates and the blood vessel model 200, the third coordinates of the stent control point 110 of the valve stent model 100 after being deployed in the blood vessel model 200 are calculated, and the valve stent model 100 in a compressed state is deployed according to the third coordinates, that is, the stent control point 110 of the valve stent model 100 is at the third coordinate.

[0078] In some embodiments, based on the third coordinate, the Laplace deformation algorithm is used to control the valve stent model 100 to be deployed at the release position. The Laplace deformation algorithm can be used to convert the valve stent model 100 from a compressed state to an expanded state in the blood vessel model 200.

[0079] It should be noted that the expansion state of the valve stent model 100 includes a fully expanded state and a partially expanded state. In some embodiments, the valve stent model 100 is in a fully expanded state in the blood vessel model 200. In some embodiments, the valve stent model 100 is in a partially expanded state in the blood vessel model 200.

[0080] In some embodiments, Figure 6 and Figure 7 As shown, in step S6, the method for unfolding the skirt model 300 and the leaflet model 400 includes:

[0081] S61, extracting skirt control points of the skirt and leaflet control points of the leaflet based on the relative position relationship among the valve stent, the skirt and the leaflet;

[0082] S62, obtaining the positional relationship between the skirt control point and the stent control point 110, and the positional relationship between the leaflet control point and the stent control point 110;

[0083] S63. Map the skirt control points and the leaflet control points onto the deployed valve stent model 100 to obtain the relative position of the deployed skirt model 300 and the valve stent model 100, as well as the relative position of the leaflet model 400 and the valve stent model 100, and draw the skirt model 300 and the leaflet model 400 to obtain a simulated image of the deployed valve assembly.

[0084] Because the skirt and leaflets are made of flexible materials, their deployment process cannot be simulated through modeling. However, because the skirt and leaflets are fixed on the valve stent, the relative position relationship between the skirt control point and the stent control point 110, as well as the relative position relationship between the leaflet control point and the stent control point 110, can be used to simulate the position of the skirt control point on the valve stent model 100 after the valve stent model 100 is deployed in the blood vessel model 200, and the position of the leaflet control point on the valve stent model 100 is simulated. According to the positions of the skirt control point and the leaflet control point, the skirt model 300 and the leaflet model 400 are drawn, thereby obtaining an image of the valve component deployed in the blood vessel model 200.

[0085] In some embodiments, Figure 1 As shown, the method of simulating the deployment of a valve component also includes:

[0086] S7. Based on the simulated image of the fully deployed valve assembly, a distance distribution diagram of the valve stent model 100 relative to the blood vessel model 200 is obtained, and the user determines whether the release position of the valve stent model 100 in step S4 is appropriate based on the distance distribution diagram. Based on the simulated image of the fully deployed valve assembly output in step S6, a distance distribution diagram of the valve stent model 100 relative to the blood vessel model 200 is obtained, and the fitting coordinates of the membrane assembly fitting to the inner wall of the blood vessel model 200 and the non-fitting coordinates of the valve assembly not fitting to the inner wall of the blood vessel model 200 are calculated based on the distance distribution diagram. The user determines whether the release position of the valve stent model 100 in step S4 is accurate based on the fitting coordinates and the non-fitting coordinates.

[0087] In some embodiments, Figure 1 As shown, if the user determines that the release position is inaccurate in step S7, step S8 is also included: S81, adjust the release position in step S4; S82, repeat steps S4 to S7 until the user determines that the release position is accurate in step S7. When the user determines that the release position in step S4 is inaccurate according to the distance distribution diagram of step S7, it is necessary to adjust the release position of the valve stent model 100 in the blood vessel model 200, and loop steps S4 to S7, so that the outer wall of the valve stent model 100 is partially attached to the inner wall of the blood vessel model 200 to obtain updated fitting coordinates, and partially not attached to the blood vessel model 200 to obtain updated non-attached coordinates, and then the user judges again that the release position of the valve stent model 100 in step S4 is accurate according to the updated fitting coordinates and the updated non-attached coordinates, and the cycle is repeated many times until the user determines that the most recent release position is accurate. The method for simulating the deployment of a valve component provided in the present application helps doctors find the precise release position of the valve component in the blood vessel, reduces the operation time, and increases the probability of successful operation.

[0088] It should be noted that the method for simulating the deployment of the valve assembly mentioned above can be used before or during surgery. If used during surgery, the image obtained refers to a DSA image. If used before surgery, the vascular model 200 mentioned in this application is generally obtained by segmenting the CTA image, and is generally used after the vascular model 200 established by the preoperative CTA image and the DSA image are aligned. In the future, it may be possible for DSA to directly obtain a three-dimensional model of the aorta and other locations. If this technology matures, the vascular model 200 mentioned in this application can also be obtained directly from the DSA device.

[0089] The present application also provides a valve component release assessment system, the valve component release assessment system comprising:

[0090] A processor, the processor is configured to:

[0091] Establishing a valve stent model 100 and a blood vessel model 200 based on the images of the valve stent of the valve assembly and the blood vessels of the patient;

[0092] Acquire a mapping relationship between a stent control point 110 of the valve stent model 100 in an expanded state and a compressed state, wherein the stent control point 110 is an intersection of metal wires of the valve stent model 100;

[0093] Put the valve stent model 100 in a compressed state into the release position of the blood vessel model 200;

[0094] Based on the mapping relationship, the valve stent model 100 simulating the compressed state is deployed at the release position;

[0095] According to the relative positional relationship between the valve stent and the skirt and leaflet of the valve assembly, the skirt model 300 and the leaflet model 400 are deployed in the valve stent model 100 to obtain a simulated image of the deployed valve assembly;

[0096] A display is connected to the processor for displaying analog images.

[0097] The above-mentioned valve component release evaluation system first establishes the valve stent model 100 and the blood vessel model 200 through the processor, and then puts the valve stent model 100 in a compressed state into the release position of the blood vessel model 200, and controls the valve stent model 100 in a compressed state to unfold at the release position again, and then according to the relative position relationship between the valve stent and the skirt and leaflet of the valve component, the skirt model 300 and the leaflet model 400 are unfolded in the valve stent model 100 to obtain a simulated image of the unfolded valve component, and finally displays the simulated image through the display for the user to watch. The present application can obtain a simulated image of the unfolded valve component through the above steps, which helps doctors predict the expansion process and results of the valve stent of the valve component after releasing the valve component at the release position, and can help doctors find the release position faster, improve surgical efficiency, and improve surgical prognosis.

[0098] In some embodiments, in response to the simulated state of the valve component after deployment not meeting the set requirements, a recommended release position or prompt information is displayed on the display. After the display of the valve component release evaluation system displays the simulated image, if the simulated state of the valve component after deployment does not meet the set requirements, the display of the valve component release evaluation system provides the user with a recommended release position or prompt information, so that the user can find a suitable release position as soon as possible.

[0099] It should be noted that the set requirements mean that the valve component after deployment needs to completely block the entire flow channel. If there are gaps, it will cause paravalvular leakage and thus fail to meet the surgical requirements.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for simulating deployment of a valve assembly, characterized in that: The method for simulating the deployment of a valve component comprises: S1, establishing a valve stent model (100) and a blood vessel model (200) based on the valve stent of the valve assembly and the image of the patient's blood vessel; S2, obtaining a first coordinate of a stent control point (110) of the valve stent model (100) in an expanded state, and obtaining a second coordinate of the stent control point (110) of the valve stent model (100) in a compressed state based on the first coordinate and the nominal size of the valve stent after compression, wherein the stent control point (110) is an intersection of metal wires of the valve stent model (100); S3, adjusting the valve stent model (100) to a compressed state based on the second coordinate; S4, placing the valve stent model (100) in a compressed state into the release position of the blood vessel model (200); S5, based on the first coordinate, the second coordinate and the blood vessel model (200), obtaining a third coordinate of the stent control point (110) after being deployed in the blood vessel model (200), and deploying the valve stent model (100) in a compressed state at the release position according to the third coordinate; S6. Based on the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, the skirt model (300) and the leaflet model (400) are unfolded in the valve stent model (100) to obtain a simulated image of the unfolded valve assembly.

2. The method for simulating deployment of a valve assembly according to claim 1, characterized in that: Also includes: S7. Based on the simulated image of the unfolded valve assembly, a distance distribution diagram of the valve stent model (100) relative to the blood vessel model (200) is obtained, and the user determines whether the release position of the valve stent model (100) in step S4 is appropriate based on the distance distribution diagram.

3. The method for simulating deployment of a valve assembly according to claim 2, characterized in that: If the user determines in step S7 that the release position is inaccurate, the following step S8 is further included: S81, adjusting the release position in step S4; S82. Repeat steps S4 to S7 until the user determines in step S7 that the release position is accurate.

4. The method for simulating deployment of a valve assembly according to claim 1, characterized in that: Before step S5, step S41 is also included, in which the valve stent model (100) in a compressed state is gradually unfolded, the stent control points (110) are subjected to wall contact detection, and the wall contact coordinates of some of the stent control points (110) are obtained.

5. The method for simulating deployment of a valve assembly according to claim 4, characterized in that: In step S5, the third coordinates of each of the stent control points (110) are obtained based on the first coordinates, the second coordinates, the wall-touching coordinates and the blood vessel model (200).

6. The method for simulating deployment of a valve assembly according to claim 5, characterized in that: Based on the third coordinate, a Laplace deformation algorithm is used to control the valve stent model (100) to be deployed at the release position.

7. The method for simulating deployment of a valve assembly according to claim 1, characterized in that: In step S6, the method for unfolding the skirt model (300) and the leaflet model (400) comprises: S61, extracting skirt control points of the skirt and leaflet control points of the leaflet based on the relative positional relationship among the valve support, the skirt and the leaflet; S62, obtaining the positional relationship between the skirt control point and the stent control point (110), and the positional relationship between the leaflet control point and the stent control point (110); S63, mapping the skirt control points and the leaflet control points onto the deployed valve stent model (100) to obtain the relative position of the deployed skirt model (300) and the valve stent model (100), as well as the relative position of the leaflet model (400) and the valve stent model (100), and drawing the skirt model (300) and the leaflet model (400) to obtain a simulated image of the deployed valve assembly.

8. The method for simulating deployment of a valve assembly according to claim 1, characterized in that: Step S2 includes: S21, extracting the skeleton structure of the valve stent model (100), identifying the intersection of the metal wires of the valve stent model (100), and using the intersection as the stent control point (110); S22. According to the adjacency relationship of the stent control point (110) of the valve stent model (100) in the expanded state, a spring mass point model of the stent control point (110) is established to obtain the first coordinate.

9. A valve assembly release assessment system, characterized in that: The valve component release assessment system comprises: A processor configured to: Establishing a valve stent model (100) and a blood vessel model (200) based on the valve stent of the valve assembly and the image of the patient's blood vessel; Acquire a mapping relationship between a stent control point (110) of the valve stent model (100) in an expanded state and a compressed state, wherein the stent control point (110) is an intersection point of metal wires of the valve stent model (100); placing the valve stent model (100) in a compressed state into a release position of the blood vessel model (200); Based on the mapping relationship, the valve stent model (100) simulating a compressed state is deployed at the release position; According to the relative positional relationship between the valve support and the skirt and leaflet of the valve assembly, the skirt model (300) and the leaflet model (400) are deployed in the valve support model (100) to obtain a simulated image of the deployed valve assembly; A display is connected to the processor for displaying the simulated image.

10. The valve component release evaluation system according to claim 9, characterized in that: In response to the simulated state of the valve assembly after expansion not meeting the set requirements, a recommended release position or prompt information is displayed on the display.

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