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Fast Needle Insertion to Minimize Tissue Deformation and Damage.

Mohsen Mahvash1, Pierre E Dupont

  • 1Department of Mechanical Engineering, Boston University, USA.

IEEE International Conference on Robotics and Automation : ICRA : [Proceedings]. IEEE International Conference on Robotics and Automation
|March 15, 2011
PubMed
Summary

Maximizing needle insertion speed minimizes tissue deformation and damage during procedures. Faster needle movement reduces positional errors and tissue energy absorption, improving accuracy in medical interventions.

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Area of Science:

  • Biomedical Engineering
  • Mechanics of Materials
  • Tissue Mechanics

Background:

  • Needle-based procedures involve tissue puncture, causing deformation and needle deviation.
  • Understanding tissue mechanics during needle insertion is crucial for improving procedural accuracy and minimizing patient trauma.

Purpose of the Study:

  • To analyze the mechanics of tissue rupture events during sharp needle insertion.
  • To model the relationship between needle velocity, tissue deformation, and rupture forces.
  • To determine the optimal needle velocity for minimizing tissue damage and insertion error.

Main Methods:

  • Nonlinear viscoelastic Kelvin model for force-deflection curve analysis.
  • Stress analysis to predict rupture force and needle velocity relationship.

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  • Experimental validation using porcine cardiac tissue.

    • Main Results:

    • Faster needle velocity leads to a steeper force-deflection response and less energy absorption by the tissue.
    • Rupture force decreases with increased insertion velocity under specific conditions.
    • Tissue deformation and absorbed energy approach lower bounds at higher velocities.

    Conclusions:

    • Maximizing needle velocity minimizes tissue deformation, damage, and insertion position error.
    • The findings provide a mechanical basis for optimizing needle insertion parameters in medical procedures.
    • Experimental results confirm the analytical predictions regarding needle-tissue interaction dynamics.