Analysis of sub-typing in full-frequency sudden deafness / 中华耳鼻咽喉头颈外科杂志

ABSTRACT

<p><b>OBJECTIVE</b>To explore the relationship between the sub-typing of full-frequency sudden deafness and its effect in treatment.</p><p><b>METHODS</b>A series of 87 cases that have full-frequency sudden deafness were studied from Aug, 2005 to Mar, 2008. All cases were treated with methylprednisolone, Batroxobin and Xueshuantong.</p><p><b>RESULTS</b>Based on the frequency of hearing loss, the objectives were divided into sudden-drop-down type and slow-drop-down type. The effective percentage and significant effective percentage in sudden-drop-down type were 84.4% (27/32) and 68.8% (22/32), respectively. The effective percentage and significant effective percentage in slow-drop-down type were 52.7% (29/55) and 32.7% (18/55), respectively. Slow-drop-down type showed a higher effective and significant effective percentage respectively (P < 0.01). According to the degree of hearing loss, objectives were divided into flat-type and profound-type. The effective percentage and significant effective percentage in flat-type were 73.3 % (44/60) and 53.3 % (32/60) respectively. The effective percentage and significant effective percentage in flat-type were 44.4% (12/27) and 29.6% (8/27) respectively. The flat-type showed a higher effective (P < 0.01) and significant effective percentage (P < 0.05) for treatment.</p><p><b>CONCLUSIONS</b>The sudden deafness needs a further classification. According to the frequency of hearing loss, it can be divided into sudden-drop-down and slow-drop-down type. According to the degree of hearing loss, it can be divided into flat-type and profound-type. It would be appropriate to using 90 dB(average hearing threshold) as a criteria for the classification of hearing loss.</p>