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  • Title: Are the effects of local joint movement on blood flow limited to the vertebral and internal carotid arteries? Doppler studies of the ulnar artery.
    Author: Haynes MJ.
    Journal: J Manipulative Physiol Ther; 1995; 18(9):569-71. PubMed ID: 8775016.
    Abstract:
    OBJECTIVE: To determine what effect wrist extension has on ulnar artery blood flow. DESIGN AND SETTING: This is a descriptive study performed at a private chiropractic clinic. SUBJECT SELECTION: Sixty-three ulnar arteries were examined from thirty-two volunteers, 15 men and 17 women, whose ages ranged from 21-75 yr. Only wrists that were asymptomatic and freely mobile were candidates for ulnar artery examination. INTERVENTION: The arteries were insonated approximately 2 cm proximal to the pisiform bone using a continuous-wave Doppler flow meter in the neutral position and during passive wrist extension to the limit with the fingers straightened. MAIN OUTCOME MEASURES: The persistence or loss of Doppler signals. RESULTS: Doppler signals from 83% (0.99 confidence interval: 68% < p < 93%) of arteries stopped. In 4% of vessels, the signals were markedly reduced; in 13%, they remained apparently unchanged. CONCLUSION: Blood flow in ulnar arteries can be severely restricted during wrist extension. By using Doppler ultrasound, the ulnar artery may provide a good model of local joint movement effects on arterial blood flow.
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