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A Mechanics and Bending Deformation Modeling Method of Flexible Needle Puncture Soft Tissue

A bending deformation, flexible needle technology, applied in medical simulation, informatics, medical informatics and other directions, can solve the problem of incomplete consideration of mechanical modeling, and achieve the effect of perfect and reasonable mechanical model

Active Publication Date: 2021-10-15
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a mechanical and bending deformation modeling method for soft tissue puncture with a flexible needle, which solves the problem that most of the existing mechanical models are simplified, and the mechanical modeling of the influence of the main force in the puncture process is not fully considered. Problem; overcoming the basic beam theory used in modeling the bending deformation of flexible needles, ignoring the defect of the square of the first derivative in the curvature formula

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  • A Mechanics and Bending Deformation Modeling Method of Flexible Needle Puncture Soft Tissue
  • A Mechanics and Bending Deformation Modeling Method of Flexible Needle Puncture Soft Tissue
  • A Mechanics and Bending Deformation Modeling Method of Flexible Needle Puncture Soft Tissue

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Embodiment Construction

[0045] The present invention proposes a method for modeling the mechanics and bending deformation of soft tissue punctured by a flexible needle, combined with the attached figure 1 , 2 As shown, a method for modeling mechanics and bending deformation of soft tissue punctured by a flexible needle is characterized in that the feeding direction of the flexible needle puncture is the positive direction of the x-axis, and the upward direction perpendicular to the x-axis is the positive direction of the y-axis. Direction, with the center of the cross-sectional circular surface at the end of the flexible needle as the origin, a rectangular coordinate system is established; the interaction force between the flexible needle and soft tissue is classified as: the end feeding force F of the flexible needle p , Clamping friction force F f , Tissue resistance F r , the cutting force F at the needle tip t and the resistive friction force F due to tissue resistance r,f and the support fri...

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Abstract

The invention provides a method for modeling mechanics and bending deformation of flexible needles puncturing soft tissue, which comprises the following steps: 1) establishing a clamping friction model; 2) establishing a cutting force model; 3) establishing a tissue resistance model; 4) according to The established mechanical model obtains and sums the lateral component forces of each force, and substitutes the lateral resultant force into the large deformation theory to solve the bending deformation of the flexible needle. The flexible needle mechanics and bending deformation modeling method of the present invention considers the influence of supporting friction force and tissue resistance friction force and other related factors, and chooses a large deformation theory that is more in line with the actual bending deformation of flexible needles to study the bending deformation of flexible needles , thus making the mechanics and bending deformation model of the flexible needle more perfect and reasonable.

Description

technical field [0001] The invention relates to a modeling method of mechanics and bending deformation of soft tissue pierced by a flexible needle. Background technique [0002] Minimally invasive interventional medicine is a brand-new medical technology that has developed rapidly in recent years. It is an emerging medical method between surgery and internal medicine. Targeted puncture technology is one of the most promising medical methods. Traditional puncture surgery uses rigid needles, which cannot effectively control the position of the needle tip. Due to uneven force on the needle tip and tissue deformation during puncture, the needle tip deviates from the intended target, resulting in puncture failure; therefore, for traditional puncture needles However, foreign scholars have proposed the use of flexible needle control technology. The flexible needle uses a slender needle tube, which can reduce tissue incision, reduce discomfort, and speed up postoperative recovery. M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16H50/50G06F30/20G06F119/14
CPCG06F30/20G06F2119/06
Inventor 赵燕江黄磊张永德胡海龙
Owner HARBIN UNIV OF SCI & TECH
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