Related Experiment Video
Updated: Feb 13, 2026

Intraoperative Ultrasound in Spinal Surgery
Published on: August 17, 2022
Threshold monitoring of intraoperative auditory steady-state responses for ossiculoplasty surgery
Qingsong Liu1, Guodong Feng1, Yingying Shang1
1a Department of Otorhinolaryngology - Head and Neck Surgery , Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing , PR China.
Objective:
The objective of this study is to establish a reliable intraoperative auditory threshold monitoring system for ossiculoplasty surgery.
Design:
The chirp signal of self-designed sound field earphone (SFE) was calibrated physically and psychophysically. The interaural attenuation of the SFE was tested in patients with unilateral complete deafness and contralateral normal hearing (10 patients). Self-designed SFEs were used to measure the chirp-evoked auditory steady-state responses (Chirp-ASSR) threshold of patients (14 cases and 15 ears) with conductive hearing loss after anesthesia but before surgery.
Results:
The response threshold of Chirp-ASSR under anesthesia displayed a strong correlation with the hearing threshold for pure tones: the Pearson coefficients at various frequencies (1, 2, and 4 kHz) were 0.56 (p = .03), 0.82 (p < .001), and 0.90 (p < .001), respectively, and the intragroup correlation coefficients were 0.70 (p = 0.02), 0.90 (p < 0.001), and 0.95 (p < 0.001), respectively. The average test time was 7.0 ± 0.7 min.
Conclusions:
By combining Chirp-ASSR with self-designed SFE, we obtained objective multi-frequency intraoperative auditory thresholds that correlate well with the pure tone audiometry threshold. This reliable system can be applied to future intraoperative auditory threshold monitoring for ossiculoplasty surgery.
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