ClinicalTrials.gg
RecruitingNCT06885411GODMOTHERUpdated Mar 20, 2025

Ototoxicity in Patients With MoM Hip Bearings

An observational study in Ototoxic Hearing Loss, Cobalt Poisoning and Chromium Causing Toxic Effect, sponsored by Reinier Haga Orthopedisch Centrum. Recruiting at 1 site in Netherlands. Per ClinicalTrials.gov, last updated 2025-03-20.

Sponsored by Reinier Haga Orthopedisch Centrum · Observational

From the registry’s dates

  • Primary completion was expected by Dec 2025, 11 months ago, but the record still lists the study as recruiting.
  • Started Feb 2023; still recruiting 3 years 9 months later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
200
Sex
All
01

Study summary

The goal of this observational study is to learn about ototoxicity in patients with a MoM hip arthroplasty. The main question it aims to answer is:

  • What is the prevalence of hearing loss in patients with high and low plasma metal concentrations.
02

Conditions studied

  • Ototoxic Hearing Loss
  • Cobalt Poisoning
  • Chromium Causing Toxic Effect
  • Arthroplasty Complications

Keywords

  • Metal-on-Metal implant; Cobalt; Chromium; Hip arthroplasty; auditory system; Otoxicity
03

In context

Hearing Loss

796 studies on the registry are indexed under Hearing Loss; 193 are open to participants now.

This study's planned enrollment of 200 is above the median of 100 across 192 observational studies indexed under Hearing Loss.

Browse Hearing Loss studies →

Lead sponsor

Reinier Haga Orthopedisch Centrum is the lead sponsor of 12 studies on the registry; 10 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

All patients in the participating hospitals with a MoM hip arthroplasty or a revised MoM hip arthroplasty.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • all MoM patients from the different clinics
  • revision MoM
  • willing to participate
  • speak/write the Dutch language

Exclusion criteria

Exclusion Criteria:

  • Not willing to participate
  • previous ENT surgery or ENT pathology
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
200 participants (estimated)
Target follow-up
1 Day
Patient registry
Yes
Biospecimen retention
Samples with dna

Groups and cohorts

  • Arthroplasty patients

    Patients with a (revised) metal-on-metal hip arthroplasty

    Other: metal-on-metal hip arthroplasty

Interventions

  • Othermetal-on-metal hip arthroplasty

    Cobalt and chromium release from metal-on-metal hip arthroplasties.

06

What researchers measure

Primary outcomes

  1. Mid frequency hearing loss

    Mid frequency hearing loss will be determined once with a conventional pure-tone audiometry test during a visit of the outpatient clinic

    Time frame: Participants will perform a hearing test once during the study, during a visit of the outpatient clinic.

Secondary outcomes

  1. Age

    Age will be determined once, during a visit of the outpatient clinic

    Time frame: Age will be determined once for each participant, at time of the visit of the outpatient clinic

  2. subjective general health and subjective hearing loss measured with the Amsterdam Inventory for Auditory Disability and Handicap questionnaire.

    The subjective general health and subjective hearing loss will be determined by Amsterdam Inventory for Auditory Disability and Handicap. The questionnaire will be completed by the participants once,at time of the visit of the outpatient clinic

    Time frame: The questionnaire will be completed once by each participant, at time of the visit of the outpatient clinic

  3. BMI

    BMI will be dermined once, at time of measurement weight and height will be combined to report BMI in kg/m\^2

    Time frame: Lenght and weight will be determined once for each participant, at time of the visit of the outpatient clinic

  4. Cobalt serum concentration

    Cobalt serum concentration will be dermined once, throught venipuncture, at time of the visit of the outpatient clinic.

    Time frame: Cobalt serum concentration will be determined once for each participant, at time of the visit of the outpatient clinic

  5. Chromium serum concentration

    Chromium serum concentration will be dermined once, throught venipuncture, at time of the visit of the outpatient clinic.

    Time frame: Chromium serum concentration will be determined once for each participant, at time of the visit of the outpatient clinic

07

Study locations

1 of 1 sites recruiting
08

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Undecided

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 20, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06885411
Lead sponsor
Reinier Haga Orthopedisch Centrum
Collaborators
Reinier de Graaf Groep, Erasmus Medical Center, Zuyderland Medical Centre
Responsible party
Sponsor
First posted
Mar 20, 2025
Start date
Feb 1, 2023
Primary completion
Dec 1, 2025 (estimated)
Completion
Dec 1, 2025 (estimated)
Last update
Mar 20, 2025

Study contacts

Nina Mathijssen, Dr
Contact
n.mathijssen@rhoc.nl
+31(0)79 206 5583
Maarten Koper, dr.
Contact
m.koper@rhoc.nl
+31(0)79 206 5583

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
View the source record on ClinicalTrials.gov ↗

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