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A Non-invasive Real-time Localization System for Enhanced Efficacy in Nasogastric Intubation.

Zhenglong Sun1, Shaohui Foong2, Luc Maréchal1

  • 1Engineering Product Development Pillar, Singapore University of Technology and Design, 8 Somapah Road, Singapore, 487372, Singapore.

Annals of Biomedical Engineering
|June 26, 2015
PubMed
Summary

This study introduces a new non-invasive system using magnetic tracking to precisely locate nasogastric (NG) tubes during insertion. The technology ensures safer and more accurate placement, reducing the need for X-rays.

Keywords:
Healthcare safetyMagnetic localizationNasogastric intubationWearable device

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Area of Science:

  • Biomedical Engineering
  • Medical Device Technology
  • Clinical Procedures

Background:

  • Nasogastric (NG) intubation is a common clinical procedure with inherent risks.
  • Current methods lack real-time tracking of NG tube placement in the critical larynx region.
  • Ensuring accurate NG tube insertion into the esophagus is vital for patient safety.

Purpose of the Study:

  • To design, analyze, and evaluate a non-invasive real-time localization system for NG intubation.
  • To improve the efficacy and safety of clinical NG intubation procedures.
  • To provide real-time positional feedback of the NG tube during insertion.

Main Methods:

  • Development of a passive magnetic tracking system with a permanent magnet at the NG tube tip.
  • A wearable sensor system around the neck determines the absolute position of the NG tube.
  • Validation using anatomically correct models, a robotic platform, and experiments in biological environments.

Main Results:

  • The system achieved a root-mean-squared tracking accuracy within 5.3 mm for both esophageal and tracheal pathways.
  • Accurate tracking was demonstrated in biological environments, even with interfering ferromagnetic objects.
  • The system successfully distinguished between correct esophageal and erroneous tracheal placements.

Conclusions:

  • The proposed non-invasive magnetic tracking system offers accurate and real-time localization of NG tubes.
  • This technology can significantly enhance the safety and efficiency of NG intubation.
  • It provides a viable alternative to radiographic methods for confirming NG tube placement.