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Related Experiment Videos

Treated needles: do they facilitate sonographically guided biopsies?

Dana I Jandzinski1, Nancy Carson, Delphine Davis

  • 1Department of Radiology, University of Rochester Medical Center, Rochester, New York 14642, USA.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|November 19, 2003
PubMed
Summary

The echogenic polymer-coated needle offered superior visualization during ultrasound-guided biopsies compared to other treated needles. Diagnostic yield rates were similar across all needle types, though sample size may have limited statistical power.

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Area of Science:

  • Medical Imaging
  • Interventional Radiology
  • Biopsy Techniques

Background:

  • Ultrasound-guided biopsies are crucial for tissue diagnosis.
  • Needle visualization during biopsy impacts procedural success.
  • Commercially available treated needles aim to improve echogenicity.

Purpose of the Study:

  • To compare needle visualization and diagnostic yield of treated vs. untreated needles in sonographically guided biopsies.
  • Evaluate the performance of Teflon-coated, etched tip, and echogenic polymer-coated needles.
  • Determine the optimal needle type for improved biopsy outcomes.

Main Methods:

  • A randomized prospective study involving 61 patients undergoing thyroid and liver biopsies.
  • Four types of 22-gauge needles were used: Teflon coated, etched tip, echogenic polymer coated, and untreated.

Related Experiment Videos

  • Two blinded radiologists assessed needle shaft and tip visualization; cytologic evaluation determined diagnostic yield.

    • Main Results:

    • The echogenic polymer-coated needle demonstrated significantly better visualization of both shaft (3.4) and tip (3.5) compared to untreated needles (shaft 2.2, tip 2.8).
    • Diagnostic yield rates were 75.0% for echogenic polymer-coated, 64.7% for Teflon-coated, 56.3% for etched tip, and 75.0% for untreated needles.
    • No statistically significant difference in diagnostic yield was observed among the needle types.

    Conclusions:

    • The echogenic polymer-coated needle provided the best visualization among all tested needles.
    • While visualization differed, diagnostic yield rates were comparable across needle types.
    • The lack of significant difference in yield may be attributed to the study's sample size.