A hand tool that helps find the hearing nerve during surgery
Original title: Handheld cochlear nerve action potential mapping for real-time functional navigation in vestibular schwannoma surgery.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This was tested in people. That is the most reliable kind of research we share.
This was watched in people at one hospital, not tested in a planned trial.
The short version
Surgeons used a small probe to find the hearing nerve during brain surgery.
What was studied. Doctors looked back at 193 people who had surgery for a vestibular schwannoma. That is a tumor on the hearing and balance nerve. During surgery, two small handheld probes were used to find the nerve.
What they found. The probe found the hearing nerve in 83.4% of cases. An older sound test found it in 46.1% of cases. When the probe signal stayed strong, 91.4% of people kept useful hearing. When the signal did not stay strong, only 8.1% did.
What this means, and what it doesn't
What it could mean: This tool may help a surgeon see where the hearing nerve is during the operation. The signal may also give the team a hint about hearing afterward.
What it doesn't mean: This is not a cure and it is not a new drug. It is one look back at records from one hospital. Nobody compared two groups side by side in a planned trial. Hearing still depends on whether the nerve stays whole. That is harder when the tumor is large.
Source: PubMed, September 4, 2026 · Read the original
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