Nova Patents
EP1903537A2

A system and a method for simulating a manual interventional operation by a user in a medical procedure

Abstract

The present invention deals with a method of simulating an interventional operation on a human or animal body, said method comprising the steps of modelling an internal system such as the cardiovascular system of said body with a mesh geometry, and simulating blood pressure, an/or collision with heart attacks and/or expansion produced during the cure of stenosis characterized in that spasms are simulated and it further comprises the step of modelling the contrast fluid diffusion in relation with the veins elasticity, and the possible presence of stenosis.

EP1903537A2, drawing sheet 1
Sheet 1 of 10

Term

Term ended

Projected expiry passed 20 July 2025, 1.2 years ago.

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11 claims: 7 independent, 4 dependent

  1. 1
    A method of simulating an interventional operation on a human or animal body, said method comprising the steps of :- modelling an internal system such as the cardiovascular system of said body with a mesh geometry, - and simulating blood pressure, an/or collision with heart attacks and/or expansion produced during the cure of stenosis characterized in that spasms are simulated and it further comprises the step of modelling the contrast fluid diffusion in relation with the veins elasticity, and the possible presence of stenosis.
  2. 3
    The method according to any of claims 1 and 2, wherein it gives at each moment the value of contrast fluid density in each position of the vascular net, and allows its visualization in the fluoroscopic image, graphing the different colour of blood vessel's surface, thereby authorising to regulate the flow rate and the duration of fluid injection as the amount of injected contrast fluid model is captured and memorised.
  3. 5
    The method according to any of precedent claims 5, for computing thickness of the simulated part of the human body, wherein the polygonal object is rendered to off-screen render targets using some measure of depth interpolated across the polygons, and that the thickness is computed at each rendered pixel.
  4. 7
    The method according to any of the preceding claims 1 to 6, wherein the mesh deformation is based on the pressure exercised from the balloon while at the same time the balloon must continue to expand based on the supplied pressure, and wherein the balloon's visualization is obtained by interpolation of a curve.
  5. 8
    The method according to any of the preceding claims 1 to 7, wherein it further comprises the step of simulating a stent by simulating a metallic mesh, every node of the metallic mesh being a particle with own physical properties connected to the other nodes according to an established design, the behaviour of every node being assimilated to a sphere's behaviour and wherein, when a self-expandable stent is deployed, the spheres that represent the nodes of the mesh are released assuming a speed that depends on their own physical properties and therefore the expansion of the simulated stent according to the invention follows physics of the expansion of a metallic mesh.
  6. 10
    The method according to the preceding claim 9, wherein systems spring-damper are applied to the bodies in every joint so that for every joint it is possible to define dumping and stiffness.
  7. 11
    The method according to any of the preceding claims 1 to 10, wherein the waveforms of the curbs are generated from a model that modify them in real time depending on the characteristics of the simulated patient's and depending on the user's actions during the procedure, wherein the ECG curves algorithm connects the animation of the heart, the curve of the pump cardiac pressure, pertaining to the physical model of the liquid of contrast, and the model of visualization, the curves being also able to represent the spasm's effects, particular cardiac situations, tachycardia and lowering of the pressure.
Independent claims7