Hearing Changes After Surgery
Public ClinicalTrials.gov record NCT04322747. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Hearing Changes After Skull Base and Mastoid Surgery
Study identification
- NCT ID
- NCT04322747
- Recruitment status
- Withdrawn
- Study type
- Observational
- Phase
- Not listed
- Lead sponsor
- Gateway Biotechnology, Inc.
- Industry
- Enrollment
- Not listed
Conditions and interventions
Conditions
Interventions
- Distortion product otoacoustic emissions (DPOAE) Diagnostic Test
Diagnostic Test
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 31, 2021
- Primary completion
- Jan 31, 2022
- Completion
- Feb 27, 2022
- Last update posted
- Aug 8, 2022
2021 – 2022
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| UPMC Presbyterian | Pittsburgh | Pennsylvania | 15213 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04322747, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Aug 8, 2022 · Synced May 20, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04322747 live on ClinicalTrials.gov.