The invited review that leads off this issue (Pages 159-163) calls attention to the technique of Doppler sonography for evaluation of blood flow in the median nerve in patients with carpal tunnel syndrome. There is evidence that, in addition to enlargement of nerves at points of entrapment, there is increased blood flow. The significance of this finding and the information it provides about the pathophysiology of entrapment neuropathy are not yet clear. Vander-schueren, et al. have been among the groups who have explored the utility of ultrasound techniques for evaluation of peripheral nerve disorders. They summarize the rather sparse literature on this topic, and it is hoped that the review will stimulate further research into a potentially useful technique.
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