The Somatic Connection  |   October 2015
Ultrasound Measurement of Vertebral Artery Blood Flow Before and After High-Velocity, Low-Amplitude Thrust Therapy
Author Notes
  • University of California, San Diego School of Medicine 
Article Information
The Somatic Connection   |   October 2015
Ultrasound Measurement of Vertebral Artery Blood Flow Before and After High-Velocity, Low-Amplitude Thrust Therapy
The Journal of the American Osteopathic Association, October 2015, Vol. 115, 628-629. doi:10.7556/jaoa.2015.128
The Journal of the American Osteopathic Association, October 2015, Vol. 115, 628-629. doi:10.7556/jaoa.2015.128
Erhardt JW, Windsor BA, Kerry R, et al. The immediate effect of atlanto-axial high velocity thrust techniques on blood flow in the vertebral artery: a randomized controlled trial [published online March 2, 2015]. Manual Ther. 2015;20(4):614-622. doi:10.1016/j.math.2015.02.008. 
Relevant to concerns about the safety of cervical spine manipulation, physical therapy researchers conducted a single-blind randomized controlled trial on 23 healthy participants aged 27 to 69 years. In this study, 14 women and 9 men were randomly assigned to an intervention group (n=11) or a control group (n=12). Exclusion criteria were a history of known vertebral artery anomalies; hypoplasia or previous injury; undiagnosed dizziness; hypertension (≥140/90 mm Hg); head or neck trauma within the past 6 weeks; known upper or midcervical instability; recent cervical spine high-velocity, low-amplitude therapy; previous cervical spine surgery or cerebrovascular events of any kind; pregnancy; use of systemic steroids or anticoagulants; cancer; Down syndrome; Klippel-Feil syndrome; Erlos-Danlos syndrome; or if the atlantoaxial section of the vertebral artery could not be visualized on ultrasound. 
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