Efficacy of Intratympanic Methylprednisolone Perfusion for the Treatment of Sudden Sensorineural Hearing Loss / 听力学及言语疾病杂志

ABSTRACT

Objective To investigate the efficacy of intratympanic methylprednisolone perfusion (IMP) for the treatment of sudden sensorineural hearing loss (SSNHL ) which failed to be fully responsive to conventional treatment .Methods The hearing outcomes of 87 patients with unilateral SSNHL were retrospectively analyzed .All of the patients received IMP after not fully responsive to conventional treatment of varying periods of time .They were hospitalized in our department between January 2008 and December 2012 and were followed up for at least one year to exclude recurrent hearing loss .Results The effective rate was 66 .67% and the mean PTA improvement was (18 .53 ± 13 .54)dB of the patients with the time interval between onset of symptoms and IMP within 15 days , 21 .21% and (5 .92 ± 15 .18)dB of the patients with the interval between 16 and 30 days ,4 .76% and (3 .69 ± 7 .00) dB of the patients with the interval more than 30 days respectively .The significant difference in the effective rates were compared among the three groups(χ2 =25 .91 ,P<0 .01) .Regarding to the PTA improvement ,the group with interval within 15 days was better than the other two groups(F=11 .182 ,P<0 .01) .A total of 30 cases acquired more than 15 dB hearing gain after IMP .One of them was hearing loss in low frequencies and the other 29 cases were hearing loss at all frequencies .The mean hearing gains of the 29 cases in 0 .25 kHz ,0 .5 kHz ,1 kHz ,2 kHz , 4 kHz and 8 kHz were 35 .17 ± 18 .15 dB ,35 .38 ± 15 .90 dB ,31 .28 ± 19 .74 dB ,21 .31 ± 17 .34 dB ,14 .97 ± 16 .00 dB and 13 .80 ± 16 .35 dB ,respectively .The mean hearing gains at lower three frequencies (0 .25~1 kHz)were better than those at higher three frequencies (2 k~8 kHz)(F=9 .494 ,P<0 .01) .Conclusion Receiving IMP earlier might help to acquire better hearing gain for the patients with SSNHL after not fully responsive to conventional treat‐ments .The hearing gains at the lower frequencies were better than those at the higher frequencies after IMP .