[The application of extended high frequency audiometry in detecting the early hearing loss for thalassemia].

To preliminarily explore the clinical significance of extended high frequency audiometry in evaluating the early hearing loss for thalassemia.Pure tone audiometry(PTA) included conventional pure tone audiometry and extended high frequency audiometry were obtained on the pre and post-treatment day in 60(117 ears) patients from September in 2013 to October in 2014. The averages of conventional pure tone audiometry for 117 cases were（15.72±11.62）dBHL on the pre-treatment day and（15.40±12.24）dBHL on the post-treatment day. There were no significant differences in PTA( >0.05). But the hearing without detection rate was higher than before especially at 18 and 19 kHz. The differences of the hearing without detection rate between the pre-treatment and the post-treatment day were statistically significant( <0.05).The extended high frequency may be more sensitive in evaluating the early hearing loss for thalassemia.