• In 56 patients with Bell's palsy, a submandibular gland function test employing a dynamic technetium Tc 99m scan was performed, to study the relationship between the test results and the prognosis of paralysis. Patients who had no difference in function on the affected facial side compared with the healthy side during the test (performed within ten days after symptomatic onset) had a high rate of early improvement. Patients who showed no response to the salivary secretory stimulant administered had an incomplete recovery and were all considered for surgery. Prognosis within ten days after onset was possible in as many as 37 of the 56 cases.
(Arch Otolaryngol 1985;111:244-248)
Yamashita T, Ino C, Tomoda K, Kumazawa T. Prognostic Determination and Submandibular Function in Bell's Palsy: Dynamic Testing With Technetium Tc 99m. Arch Otolaryngol. 1985;111(4):244–248. doi:10.1001/archotol.1985.00800060068009
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