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Related Experiment Video

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Introduction to the Ultrasound Targeted Microbubble Destruction Technique
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Enhanced needle visibility by microbubbles generated with negative pressure using an in-plane technique.

Yong Liu1, Xingxing Sun1, Wei Qian1

  • 1Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Regional Anesthesia and Pain Medicine
|June 28, 2019
PubMed
Summary

The negative pressure method significantly enhances microbubble-filled needle visibility compared to other techniques. Optimal visibility was observed at specific insertion angles, improving needle detection in ultrasound imaging.

Keywords:
regional anesthesiaresident educationtechnology

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Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Biomedical Engineering

Background:

  • Previous research indicated microbubbles improve needle visibility.
  • This study investigates methods for generating microbubbles within needles to enhance visibility.
  • The negative pressure method is hypothesized to be superior for microbubble generation.

Purpose of the Study:

  • To compare the efficacy of the negative pressure method against mixing and commercial microbubble methods for enhancing needle visibility.
  • To evaluate the impact of needle type, insertion angle, and internal contents on microbubble-filled needle visibility.

Main Methods:

  • Three methods (negative pressure, mixing, commercial microbubbles) were used to fill needles with microbubbles in a porcine model.
  • A 2x5x5 factorial design assessed the influence of needle types, insertion angles (40°, 50°, 60°), and contents.
  • Ultrasound imaging and video recording were employed for objective visibility analysis, with saline-filled needles serving as controls.

Main Results:

  • The negative pressure method demonstrated significantly higher needle visibility (p<0.001).
  • Insertion angles were the primary determinant of needle visibility (p<0.001).
  • Microbubble-filled needles showed significantly greater visibility than controls at 40°, 50°, and 60° insertion angles (p<0.001 for all).

Conclusions:

  • Microbubbles generated via the negative pressure method significantly improve needle visibility in porcine tissue.
  • This enhancement is particularly effective at insertion angles of 40°, 50°, and 60°.
  • The findings support the use of the negative pressure method for improved ultrasound-guided needle procedures.