What electroacoustic parameter requires special caution when fitting a patient who has undergone a stapedectomy?

The correct focus on the OSPL-90 parameter when fitting a patient who has undergone a stapedectomy is important because this measure indicates the maximum output level of the hearing aid. After a stapedectomy, which involves the surgical removal of the stapes bone in the middle ear to improve hearing by allowing sound vibrations to pass more effectively to the inner ear, patients may experience changes in their hearing thresholds and an altered response to sound amplification.

Careful monitoring of the OSPL-90 is essential as amplifying sounds too loudly can lead to discomfort or even damage to the auditory system, especially since the surgical procedure may cause sensitivity to sound. Tailoring the hearing aid's output to ensure it does not exceed safe listening levels is crucial in preventing further hearing issues or pain for the patient.

Other parameters also play a role in hearing aid fitting, but OSPL-90 is particularly critical in this scenario due to the nature of the surgery and its potential impact on a patient's tolerance to sound.