Echogenic regional anaesthesia needles: a comparison study in Thiel cadavers

Shuo Guo, Andreas Schwab, Graeme McLeod, George Corner, Sandy Cochran, Roos Eisma, Roger Soames

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)


    Ultrasound guidance is now the standard procedure for regional nerve block in anesthesiology. However, ultrasonic visualisation of needle manipulation and guidance within tissues remains a problem. Two new echogenic needles (Pajunk and Braun) have been introduced to anesthesiology clinical practice but evaluation has been restricted to preserved animal tissue. In this study, the visibility of both echogenic needles was compared with a standard nonechogenic needle in a Thiel cadaver model. A total of 144 intramuscular injections were made in the upper arm in-plane and out-of-plane to the ultrasound beam at four angles (30 degrees, 45 degrees, 60 degrees and 75 degrees). The visibility of the needle was assessed by two independent, blinded observers using a 5-point Likert ordinal scale. Weighted kappa for interobserver agreement was 0.77 (95% confidence interval [CI]: 0.68-0.86). The Pajunk echogenic needle was more visible than the Braun standard needle in-plane (p = 0.04), and the Braun standard and Braun echogenic needles out-of-plane (p = 0.02). Independent predictors of visibility using logistic regression were needle (p < 0.001) and plane of insertion (p = 0.08), receiver operator characteristic (ROC) area under the curve 0.90. In conclusion, the Pajunk echogenic needle offers the best visibility for ultrasound-guided regional anesthesia. (E-mail: [email protected]) (C) 2012 World Federation for Ultrasound in Medicine & Biology.

    Original languageEnglish
    Pages (from-to)702-707
    Number of pages6
    JournalUltrasound in Medicine and Biology
    Issue number4
    Publication statusPublished - Apr 2012


    • Analysis of Variance
    • Anesthesia, Conduction
    • Cadaver
    • Chi-Square Distribution
    • Humans
    • Logistic Models
    • Needles
    • Pilot Projects
    • ROC Curve
    • Ultrasonography, Interventional
    • Upper Extremity


    Dive into the research topics of 'Echogenic regional anaesthesia needles: a comparison study in Thiel cadavers'. Together they form a unique fingerprint.

    Cite this