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Hip ReplacementNCT00883805

Investigation of Systemic Metal Ion Concentration Following a Ceramic-on-metal Total Hip Arthroplasty

An observational study of Hip Replacement and Hip Implant, run by Northwell Health at 1 site in United States.

Withdrawn

Withdrawn. The study stopped before anyone enrolled.

Official record
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Trial summary

This is a pilot study to compare systemic concentrations of cobalt and chromium in patients that have previously undergone total hip arthroplasties with ceramic on metal and metal on metal bearing surfaces. Read more about this study

Who is it for?
Ages 40 to 80 years
What is being tested?
Blood draw and X-Ray of Hip
Type of treatment
Surgery or procedure
How many people
0 participants
Where
1 siteUnited States
Study dates
Apr 2009to Apr 2014
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 40 to 80 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: Subjects enrolled will have already undergone a total hip arthroplasty with either a metal-on-metal articulation, or a ceramic-on-metal articulation.

Who may be able to join

  • Subject is 40 - 80, who has undergone a top hip arthroplasty with either metal on metal or ceramic on metal articulation for a diagnosis of non-inflammatory degenerative joint disease. We will also include subjects who have had bilateral hip arthroplasties or a second arthroplasty performed since the initial surgery.
  • Patient must be able to provide consent to participate

Who cannot join

  • Diagnosis other than non-inflammatory degenerative joint disease, chronic renal insufficiency, or any systemic inflammatory condition
  • Evidence of active infections
  • Patients whose occupations include welding or metal working
  • A second arthroplasty performed since the initial will not be exclude, but their data will be analyzed as a subpopulation
  • unwillingness to comply with rehabilitation program or inability to return for follow-up visits
  • Any systemic steroid therapy within 3 months of surgery
  • Subjects who are pregnant

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Feinstein Institute for Medical Research

    Manhasset, New York, 11030

Other trials in United States

About this study

This is a pilot study to compare systemic concentrations of cobalt and chromium in patients that have previously undergone total hip arthroplasties with ceramic on metal and metal on metal bearing surfaces.

Read the detailed description

This is a pilot study to compare systemic concentrations of cobalt and chromium in patients that have previously undergone total hip arthroplasties with ceramic on metal and metal on metal bearing surfaces. Secondary goals include an assessment of osteolysis on radiographs, potential long term analysis of implant survivability, and cancer rates in the two patient populations.

Increased metal ion production has been documented in metal-on-metal arthroplasty articulations. There are several concerns over metal ion production. First, even though there is a decreased histiocytic response to metallic debris, a dose dependent cytotoxic response with Interleukin 6, Prostaglandin E2, and Tumor Necrosis Factor alpha persists and may cause osteolysis in the long term. Second, increased levels of cobalt, chromium and nickel has been shown to correlate with increased cancer rates in several animal models, and the carcinogenic risk in humans has not been fully elucidated as yet. Third, hypersensitivity reactions to metal ion develop in up to 25% of these patients, and 60% of patients with poorly functioning hip.

Ceramic on metal avoids many of these problems due to the improved wear characteristics. If the level of metal ion production is significantly reduced and the implant survivability is proven in long term studies, this articulation may become the preferred method.

Being tested
Blood draw, X-Ray of Hip
Keywords
Metal Ion Concentration, Osteolysis
Medical subject headings
Osteolysis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Blood drawBiological

    Subjects will give blood for analysis of metal ion concentrations

  • X-Ray of HipRadiation

    Subject will have x-ray of hip to assessment of osteolysis

Study groups in NCT00883805
Study groupRoleWhat they receive
Metal-on-Metal ArticulationsSubjects will be people who have had metal-on-metal total hip arthroplasties
Receives: Biological: Blood draw; Radiation: X-Ray of Hip
Ceramic-on-Metal ArticulationsSubjects will be people who have had ceramic-on-metal total hip arthroplasties
Receives: Biological: Blood draw; Radiation: X-Ray of Hip

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. metal ion concentration in urine

    Measured: 1 year post-op

Secondary outcomes (1)
  1. metal ion concentration in blood

    Measured: 1 year post-op

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted20 Apr 2009 (estimated)
  2. Study startApr 2009
  3. Primary completionApr 2014

Why it stopped: PI moved

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
0 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00883805
Sponsor's protocol ID
GCRC 0163
Other IDs
IRB# 07-08-105
Status last verified
Sep 2015
First submitted
17 Apr 2009
Last updated
17 Sep 2015
Results posted
No
Data monitoring committee
No

Questions about this trial

What is this clinical trial studying?

An observational study of Hip Replacement and Hip Implant, run by Northwell Health at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: withdrawn, as of the sponsor's last update on 17 Sep 2015. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study was withdrawn before enrolling participants, so there are no results.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

metal ion concentration in urine (time frame: 1 year post-op). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Sep 2015.

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