Electrolytic echo enhancement: a novel method to make needles more reflective to ultrasound
John F Cockburn1, Stefan K Khosh
1Department of Imaging, The Canberra Hospital, Australian National University, Canberra, Australian Capital Territory, Australia.
Introduction:
This study examines the effect of augmenting the ultrasound reflectivity of needles using a novel electrolytic echo enhancement method.
Methods:
Needles were connected by a lead to the negative terminal of a 4.5 V direct current source. A grounding pad, connected to the positive terminal, was positioned on the undersurface of an ex vivo ox liver phantom. During needle insertion into the liver, electrolysis was induced creating a layer of gas on the needle electrode.
Results:
Analysis of images showed a significant increase in needle brightness using electrolytic echo enhancement. Brightness was found to increase by a factor of ×3.6 compared with controls (P < 0.001).
Conclusion:
Electrolytic echo enhancement has the potential to make ultrasound-guided procedures safer and quicker for patients and increase the confidence of operators in their ability to see the whole needle including its tip.
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