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MagnetoSuture: Tetherless Manipulation of Suture Needles.

Lamar O Mair1, Xiaolong Liu2, Bhargav Dandamudi2

  • 1Weinberg Medical Physics, Inc., North Bethesda, Maryland 20852 USA.

IEEE Transactions on Medical Robotics and Bionics
|November 8, 2021
PubMed
Summary

This study shows magnetically actuated suture needles can perform tissue penetration and ligation for minimally invasive surgery. This magnetic suturing system offers a tetherless, less invasive alternative to traditional surgical tools.

Keywords:
Electromagnetic systemmagnetic controlmagnetic needle steeringsuturetissue ligationtissue penetration

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Area of Science:

  • Minimally Invasive Surgery
  • Robotics and Control
  • Biomedical Engineering

Background:

  • Conventional surgical tools for needle manipulation in minimally invasive surgery have large footprints, increasing invasiveness and potential complications.
  • Tetherless magnetic actuation of suture needles presents a novel approach to overcome the limitations of current articulated surgical instruments.

Purpose of the Study:

  • To demonstrate the feasibility of using magnetic fields for tetherless steering of suture needles.
  • To assess the capability of magnetically actuated needles for tissue penetration and ligation in surgical suturing tasks.

Main Methods:

  • Development and utilization of the MagnetoSuture™ system for magnetic needle manipulation.
  • Experiments conducted using customized NdFeB suture needles with attached threads and remote-controlled magnetic fields.
  • Testing performed on ex vivo tissues, including rat intestines, to evaluate system performance.

Main Results:

  • Successful demonstration of tissue penetration and ligation using magnetically actuated suture needles.
  • Proof-of-concept achieved for tetherless recreation of a purse string suture pattern.
  • Validation of the system's ability to penetrate and ligate rat intestinal tissue.

Conclusions:

  • Magnetically actuated suture needles are feasible for surgical suturing, offering a less invasive alternative.
  • The MagnetoSuture™ system shows promise for advancing minimally invasive surgical techniques.
  • Further research into magnetic suturing could lead to reduced patient recovery times and improved surgical outcomes.