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Related Experiment Videos

Vertebral artery flow and spinal manipulation: a randomized, controlled and observer-blinded study

P B Licht1, H W Christensen, P Højgaard

  • 1Department of Clinical Physiology and Nuclear Medicine, Odense University Hospital, Denmark.

Journal of Manipulative and Physiological Therapeutics
|May 6, 1998
PubMed
Summary

Spinal manipulative therapy did not alter vertebral artery blood flow in healthy students with cervical dysfunction. This study found no significant changes, suggesting it

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Area of Science:

  • Neurology
  • Vascular Medicine
  • Biophysics

Background:

  • Limited research exists on spinal manipulative therapy's impact on vertebral artery blood flow.
  • Previous studies focused on cervical rotation's effect on vertebral arteries.

Purpose of the Study:

  • To investigate changes in vertebral artery peak flow velocity following spinal manipulative therapy.
  • Utilize advanced Doppler ultrasound technology to measure blood flow dynamics.

Main Methods:

  • Conducted a randomized, controlled, observer-blinded study.
  • Recruited 20 university students with cervical spine biomechanical dysfunction.
  • Performed measurements in a university hospital vascular laboratory.

Main Results:

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  • No significant changes in peak flow velocity were observed immediately after spinal manipulative therapy.
  • No correlation was found between peak flow velocity and systolic blood pressure.
  • This is the first study to compare pre- and post-therapy flow velocity.

Conclusions:

  • Spinal manipulative therapy did not significantly affect vertebral artery blood flow in healthy subjects with cervical dysfunction.
  • While major flow changes could theoretically link to cerebrovascular accidents, this risk was not evident in uncomplicated therapy.
  • Findings suggest a low risk of significant hemodynamic changes from spinal manipulative therapy in this population.