A double-blind, placebo-controlled study of repetitive transnasal sphenopalatine ganglion blockade with tx360(®) as acute treatment for chronic migraine.

Headache · 2015 · PMC4320756 · PMID 25338927

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a decreasing trendno p-value reported

Although not statistically significant, there was a decreasing trend in the bupivacaine group across the 12 treatments compared with those receiving sham saline 15 minutes posttreatment (Fig. 4 , Table 6 ).

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