Analysis of Distortion Product Otoacoustic Emissions in Hepatitis B Carrier and Chronic Hepatitis B Patients with Normal Pure Tone Findings / 听力学及言语疾病杂志

Objective To investigate the characteristics of distortion products otoacoustic emission (DPOAE) in hepatitis B carriers and chronic hepatitis B patients with normal pure tone results .Methods DPOAE was detected in 29 hepatitis B carriers (58 ears) ,30 chronic hepatitis B patients (60 ears)and 30 normal controls .The three groups had normal pure tone results .The detection rate and amplitude difference of DPOAE at 553～6250 Hz were compared between the two groups .Results The incidence of the DPOAE in HBV carriers for all the frequencies was higher than that in the chronic hepatitis B group ,but there was no significant difference (P>0 .05) .The level of the DPOAE in HBV carriers for all the frequencies was higher than that in chronic hepatitis B group ,and there were significant differences at 1105 ,1560 ,2211 ,3125 ,4416 ,6250 Hz (P<0 .05) ,and at 1560 ,2211 ,6250 Hz(P<0 .01) ,except at 553 ,783 Hz (P>0 .05) .Conclusion There is a potential loss of cochlear functions in the chronic hepatitis B group compared with the HBV carrying group .We suspect that the progress of liver disease is related to the potential hearing loss .

Endoscopic endonasal approaches for repair of cerebrospinal fluid rhinorrhea / 中国耳鼻咽喉头颈外科

OBJECTIVE To describe the surgical experience in the repair of cerebrospinal fluid (CSF)rhinorrhea treated by endoscopic transnasal approaches. METHODS From Oct. 2003 to Dec. 2008, 38 patients with CSF rhinorrhea were treated. Endoscopic endonasal approaches and surgical techniques in repair of CSF leaks were reviewed in a series of 38 patients included 21 patients with traumatic CSF leakage, 10 patients with spontaneous CSF leakage, and 7 patients with other reasons. RESULTS Followup of 6 months to 3 years after operation, successful rate at first attempt was 92.1%. Two patients needed a second surgical repair and one patient a third surgical repair. The complications included meningitis and acute obstructive hydrocephalus in two patients respectively. CONCLUSION The endoscopic endonasal approaches is the first choice for repair of CSF leakage for its minimal invasive injury and high successful rate. Leakage site identification, site preparation, accurate graft placement and postoperative management are critical to the success of operation.

Effect of Otologic Drill Noise on Inner Ear Functions of the Guinea Pig / 听力学及言语疾病杂志

0.05). Conclusion The noise induced by otologic drill did not show the effect that could damage the inner ears and led to the deterioration of the inner ear function.