ABSTRACT
Objective To study the clinical significance of Chirp-ASSR and the characteristics of hearing loss patients by ASSR(auditory steady-state responses) under Chirp stimulation.Methods A total of 136 hearing loss children (5～10 years old) with 272 ears were distributed into four groups based on 500 Hz,1 000 Hz,2 000 Hz and 4 000 Hz auditory threshold arithmetic average:20～dB HL,40～dB HL,60～dB HL,and≥80 dB HL groups.To compare the correlation of the PTA and Chirp-ASSR in different frequencies domain through SPSS statistics 19.0 software,the data were used T-test and Pearson analysis.Results ①The group(≥80 dB HL) achieved a statistically significant higher reaction threshold than pure tone threshold.②The correlation index γ'of PTA and Chirp-ASSR showed a decline along with the hearing loss increase;It increased along with the test frequency,there was a significant difference between 500 Hz and 4 000 Hz(P＜0.05).Conclusion Chirp-ASSR is a frequency-specific electrophysiological test method,it could reflect the truthful listening ability,especially in mild,moderate,and severe hearing loss children.
ABSTRACT
OBJECTIVE@#To investigate the feasibility of applying ultracision-harmonic scalpel in tonsillectomy.@*METHOD@#Thirty-one cases treated with tonsillectomy which applied with nasal endoscope and ultracision-harmonic scalpel (ultrasonic scalpel group) and 31 cases treated with routine operation (routine group) respectively. The operating time and blood loss during operation and the degree of pain and the region of inflammation humidity as well as hospitalization days were observed.@*RESULT@#All indexes in ultrasonic scalpel group were lower than that in the routine group, including operating time and blood loss during operation, and they were obviously difference in statistics (P < 0.01).@*CONCLUSION@#The application of ultracision-harmonic scalpel in tonsillectomy was safe, efficient and feasible, and would have a nice application prospect during ear-nose-throat operation.