Evaluation of the Benefits of Bilateral Fitting in BAHS Users

Bilateral Hearing Loss Clinical Trial

Official title:

Evaluation of the Benefits of Bilateral Fitting in Bone-anchored Hearing System Users

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04006132
• Other study ID #: C71
• Status: Completed
• Phase: N/A
• Start date: July 4, 2019
• Est. completion date: January 10, 2020

Study information

• Verified date: January 2020
• Source: Oticon Medical
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to evaluate the benefit of bilateral implantation with bone-anchored hearing systems (BAHS), in terms of sound localization abilities, as well as auditory working memory. The hypothesis is that the use of two BAHS (bilateral condition) will not only improve localization abilities, but it will also increase the ability to retain words in working memory, compared to performance with only one BAHS (unilateral condition).

Description:

The patients included in this study are adult patients with a bilateral conductive or mixed hearing loss, that are already bilaterally implanted with two percutaneous bone-anchored devices (BAHS). The study consists of two visits. At visit 1, the patients are fitted unilaterally and bilaterally with the investigational device (Ponto 3 SuperPower). After fitting, the patients perform a test of spatial resolution (minimum audible angle, visit 1) and an auditory working memory test (visit 2). These two outcome measures are conducted in the laboratory using the Ponto 3 SuperPower unilaterally and bilaterally. Additionally, the patients fill in a questionnaire (SSQ12) to report perceived performance in their everyday life with their own devices. This is a post market study and all products used are CE marked and used in clinical practice worldwide.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 26
• Est. completion date: January 10, 2020
• Est. primary completion date: January 7, 2020
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 75 Years

Eligibility

Inclusion Criteria:

• Adult BAHS users, minimum 18 years and maximum 75 years.

• Native English speakers.

• Patients that are already bilaterally implanted.

• Patients with a bilateral conductive or mixed conductive-sensorineural hearing loss.

• Experience with bilateral Ponto of at least 6 months.

• Patients that are using both their sound processors daily.

• PTA BC (at 0.5, 1, 2, 3 kHz) on both sides lower or equal to 65 dB HL.

• If the masked BC is available on the patient's journal, the average difference in masked BC (at 0.5, 1, 2, 4 kHz) between L and R ear should be lower than 15 dB.

• If the masked BC is not available on the patient's journal, the average difference in unmasked BC (at 0.5, 1, 2, 4 kHz) between L and R ear should be lower than 15 dB.

Exclusion Criteria:

• Not deemed suited by the principal investigator.

• If the physician assesses that the patient is not fit for trial participation at any stage.

• Audiogram at 1st visit shows too large masked BC thresholds (PTA BC - at 0.5, 1, 2, 3 kHz - on either side larger than 65 dB HL).

• Audiogram at 1st visit shows asymmetric masked BC thresholds (average difference in masked BC - at 0.5, 1, 2, 4 kHz - between L and R ear larger or equal to 15 dB).

Related Conditions & MeSH terms

• Bilateral Hearing Loss
• Hearing Loss
• Hearing Loss, Bilateral

Intervention

Device:
• Fitting of Ponto 3 SuperPower
Bone-anchored hearing systems (BAHS) use the body's natural ability to transfer sound through bone conduction. The sound processor picks up sound and converts it into vibrations that are transferred through the skull bone to the inner ear (cochlea). Thus, for patients with conductive or mixed hearing losses, patients with lasting hearing loss following a middle ear disease or malformations (such as microtia), the vibrations are bypassing the conductive problem in the ear canal or middle ear. The intervention in this study is audiologically fitting two bone-anchored sound processors (Ponto 3 SuperPower) to patients that are already bilaterally implanted with abutments.

Locations

Country	Name	City	State
United Kingdom	Audiology Department, Nuffield House, University Hospitals Birmingham	Birmingham	West Midlands

Sponsors (1)

Lead Sponsor	Collaborator
Oticon Medical

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Minimum Audible Angle test	Minimum angle at which noise bursts are accurately localized (Right/Left) in the unilateral and bilateral conditions	4 months
Secondary	SWIR test	Percentage of recalled words in the unilateral and bilateral conditions	4 months
Secondary	SSQ12	Subjective performance as measured by Speech, Spatial and Qualities of Hearing questionnaire (SSQ); 12 items with a scale from 0-10 where 0 represents "Not at all" and 10 represents "Perfect"	4 months