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Related Concept Videos

Three-Dimensional Force System01:30

Three-Dimensional Force System

In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...

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A generic three-dimensional static force distribution basis for a medical needle inserted into soft tissue.

Adeline L G Robert1, Grégory Chagnon, Ivan Bricault

  • 1UJF-Grenoble1, CNRS, TIMC-IMAG UMR5525, Grenoble, France.

Journal of the Mechanical Behavior of Biomedical Materials
|August 31, 2013
PubMed
Summary

Researchers identified a generic force basis for medical needles interacting with soft tissue during Computerized Tomography (CT) guided insertion. This basis aids in understanding needle forces and developing advanced robotic and image-guided steering strategies.

Keywords:
B-spline theoryBeam theoryEx vivo measurementsForce distributionIn vivo forcesNeedle deformation

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Area of Science:

  • Medical Engineering
  • Biophysics
  • Robotics

Background:

  • Accurate modeling of needle-tissue interaction is crucial for image-guided interventions.
  • Understanding forces during needle insertion can improve precision and safety.
  • Current models may not fully capture the complex forces involved.

Purpose of the Study:

  • To identify a generic basis for static interaction forces between a medical needle and soft tissue.
  • To develop a framework for describing forces acting on a non-fixed needle during insertion.
  • To enable the development of predictive models for needle deflection and steering.

Main Methods:

  • Insertion of a needle 62 times into porcine shoulder tissue.
  • Acquisition of Computerized Tomography (CT) scans to determine needle trajectories.
  • Application of static Beam, B-spline theories, and Principal Component Analysis (PCA) to derive a force basis.
  • Validation through theoretical simulations and clinical interventions with 20 different needles.

Main Results:

  • A generic, linearly independent basis describing static interaction forces was identified.
  • The basis accurately represents forces acting on a needle inserted into human tissue.
  • The identified basis provides a foundation for modeling needle deflection.

Conclusions:

  • The developed generic force basis offers a comprehensive method for analyzing needle-tissue interactions.
  • This work facilitates the creation of advanced models for needle deflection.
  • The findings support the development of automated, robot-assisted, and image-guided needle steering systems.