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Brachial plexus sonography: a technique for assessing the root level.

Carlo Martinoli1, Stefano Bianchi, Elena Santacroce

  • 1Cattedra di Radiologia R, DICMI, Università di Genova, Largo Rosanna Benzi, 8, I-16132 Genova, Italy.

AJR. American Journal of Roentgenology
|August 20, 2002
PubMed
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High-resolution sonography can identify brachial plexus root levels using vertebral transverse processes as landmarks. This technique aids in precise surgical planning for nerve root pathologies.

Area of Science:

  • Medical Imaging
  • Neurology
  • Anatomy

Background:

  • Accurate localization of brachial plexus roots is crucial for diagnosing and treating neurological conditions.
  • Current imaging techniques may have limitations in precisely identifying individual nerve root levels.

Purpose of the Study:

  • To develop and validate a high-resolution sonography technique for assessing brachial plexus root levels.
  • To utilize the unique morphology of cervical vertebrae transverse processes as sonographic landmarks.

Main Methods:

  • In vitro examination of a cervical spine skeleton to identify sonographic landmarks.
  • Sonographic evaluation of 20 healthy subjects and 5 patients using transverse processes to identify brachial plexus roots.
  • Blinded review of sonograms by three independent examiners to assess method reliability.

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Main Results:

  • Sonography reliably depicted the C7 vertebra level due to its transverse process morphology.
  • C4-C7 brachial plexus roots were visualized in all subjects; C8 and T1 roots were visualized in 80% and 40% of cases, respectively.
  • Independent examiners achieved high accuracy in identifying the C7 nerve root level via sonography.

Conclusions:

  • High-resolution sonography, guided by vertebral transverse process anatomy, effectively visualizes brachial plexus root levels.
  • This sonographic method offers a valuable tool for pre-operative confirmation of pathologic nerve root levels.