What is the maximum sensorineural hearing loss on a good ear for Ponto candidacy?
Answer
The FDA indications for candidacy is hearing loss up to 55 dB for the Ponto Pro Power and Ponto Plus Power for ipsilateral mixed losses. In cases of singled sided deafness (SSD), FDA indications state the good ear has normal or near-normal hearing (up to 20 dB). If we take a threshold on the good ear, and the patient has an average threshold of 20 dB or better but does have a little bit of high-frequency hearing loss, they are still a candidate. If you are going to fit this patient with a percutaneous system for SSD and they are showing a little bit of high-frequency hearing loss, I would definitely use a power device. We also have to deal with our transcranial attenuation to make sure the sound gets there in the first place. That high-frequency hearing loss cannot be so severe that it pulls down the average hearing threshold in the good ear below 20 dB.
Does borderline moderate sensorineural hearing loss qualify?
The answer to that is no. Patients with more severe losses will be better candidates for BI-CROS systems, because we cannot guarantee that the amplification with a bone anchored hearing systems will be adequate. We need to make sure that we are sending a strong enough signal to the good cochlea where it will be heard. If they have too much hearing loss in the good cochlea, it will not be heard.
Jaime is an Audiological Trainer and Supporter based at Oticon Medical within Oticon Headquarters in Smørum Denmark. She is originally from Canandaigua, NY and received her Au.D. from the State University of New York at Buffalo in 2011. Prior to working with Oticon Medical, she was an audiologist at Clifton Springs Hearing Center, southeast of Rochester, New York. She was raised in Tokyo, Japan, and was eager to return to the international community after completing her degree- she now develops and provides trainings for internal salespeople and supports customers worldwide.
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