VSB for unilateral conductive or mixed hearing loss

VSB for unilateral conductive or mixed hearing loss - VSB for unilateral conductive or mixed hearing loss

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000030055

Enrollment

Registered

2017-11-21

Start date

2016-07-09

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Unilateral conductive hearing loss Unilateral mixed hearing loss

Interventions

Set the flowing mass transducer of VSB system on the round window by operation.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patient fulfill the below bone conduction hearing thresholds. 500Hz:45dB or less 1000Hz:50dB or less 2000Hz:65dB or less 4000Hz:65dB or less

Exclusion criteria

Exclusion criteria: 1) Patients with highly malformation of cochlear or temporal bones. 2) Patients do not use general anesthesia.

Design outcomes

Primary

Measure	Time frame
The therapeutic effects are evaluated at 12 month after VSB surgely using free field audiometoly. 20dB or more threshold recovery regarded as effective cases.	—

Countries

Japan

Contacts

Public ContactShin-ya Nishio

Shinshu University School of Medicine Department of Otorhinolaryngology

nishio@shinshu-u.ac.jp0263-37-2666

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026