Abstract
BACKGROUND: Retroauricular injection is a local steroid hormone administration method commonly used to treat deafness or tinnitus. The acute stage of Bell's Palsy is an acute disease that requires steroid therapy. Retroauricular injection may replace oral administration of steroid hormones in the treatment of this disease as well as reduce the occurrence of adverse reactions. METHODS: This study included patients with Bell's Palsy within seven days of onset. A total of 120 patients were enrolled as the study subjects and randomly divided into two groups: the experimental group and the control group. Both groups received routine acupuncture treatment and took a traditional Chinese medicine decoction corresponding with the syndrome type. Methylprednisolone sodium succinate was injected into the bone surface of retroauricula in the experimental group, and prednisone acetate was orally administered in the control group. The main outcome indicators were the House-Brackmann (HB) grade, the facial disability index (FDI), and time of postauricular pain after one month of treatment. RESULTS: There were no significant differences in the HB grade (2.00 ± 1.06 vs. 1.88 ± 1.06, P=), FDIP (97.25 ± 6.00 vs. 97.17 ± 7.39, P=), and FDIS (0.60 ± 3.02 vs. 1.33 ± 4.27, P=) at 30 days after treatment between the two groups (P > 0.05). Postauricular pain disappeared earlier in the experimental group (3.66 ± 1.67 days) than in the control group (6.31 ± 2.34); the difference was statistically significant (P ≤ 0.001). The adverse reaction rate was lower in the experimental group (15.00%) than in the control group (21.66%). INTERPRETATION: Although the dose of steroid hormone injected into the bone surface of retroauricula in the treatment of Bell's Palsy is lower than the administered dose of oral hormones, it has the same curative effect; however, it has a better effect regarding to the duration of postauricular pain and adverse reactions.