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Author Spotlight: Enhancing Microinjection Needle Quality by Wet Beveling
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Needle placement errors: do we need steerable needles in interventional radiology?

Tonke L de Jong1, Nick J van de Berg1, Lisette Tas1

  • 1BioMechanical Engineering Department, Delft University of Technology, Delft, the Netherlands, T.L.deJong@tudelft.nl.

Medical Devices (Auckland, N.Z.)
|August 21, 2018
PubMed
Summary

Interventional radiologists face challenges with needle placement accuracy due to target motion. Steerable needles are highly desired to improve precision and overcome current limitations in radiologic interventions.

Keywords:
clinical useinterventional radiologyneedle bendingneedle deflectionneedle placement errorquestionnairesteerable needle

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Area of Science:

  • Interventional Radiology
  • Medical Device Engineering
  • Surgical Navigation

Background:

  • Accurate needle placement is critical in interventional radiology but challenging due to tissue motion and deformation.
  • Current needle limitations impact procedural success and patient outcomes.

Purpose of the Study:

  • To assess the clinical need for steerable needles in interventional radiology.
  • To identify current challenges in needle placement and allowable error margins.
  • To determine if steerable needles offer added clinical value.

Main Methods:

  • A survey was conducted among 125 interventional radiologists at a European radiology meeting.
  • Respondents reported on challenges, allowable errors, and perceived value of improved needles.

Main Results:

  • Patient movement (90%) is the primary challenge in needle placement.
  • The mean allowable needle placement error is 2.7 mm, with 85% experiencing needle bending (mean 5.3 mm).
  • 95% of radiologists desire needle improvements, and 93% see value in steerable needles.

Conclusions:

  • Steerable needles show significant potential to enhance clinical value in radiologic interventions.
  • Findings can inform the design of advanced tools like steerable needles and navigation systems.
  • Improving needle placement accuracy is a key goal for future interventional radiology tools.