A Validated Necrosis Assay to Determine the Need for Revision Surgery in Metal-on-metal Total Hip Arthroplasty

OrthoCarolina Research Institute, Inc.

Status

Suspended

Conditions

Arthritis, Failure of Total Hip

Study type

Observational

Funder types

Other

Identifiers

NCT02208271

HK003-14014

Details and patient eligibility

About

The purpose of the study is to develop a biomarker assay to be used as a diagnostic tool for adverse local tissue reaction, or tissue necrosis, in a metal on metal total hip replacement.

A convenience sample of a total of 100 hip patients will be enrolled: 50 metal-on-metal revision hips, 25 metal-on-poly revision hips, and 25 pre-operative total hips (no implant, control group) will be enrolled. Preoperative blood serum samples and intraoperative synovial fluid will be obtained from all hips and used for biomarker testing. Additionally, intraoperative assessment of tissue necrosis will be assessed.

Full description

Well-functioning MoM implants have shown an increase in serum cobalt and chromium (CoCr) ion levels from the metal debris generated from the implant wear.However, the current evidence suggests that measuring ion levels is unreliable and that increasing ion levels do not correlate with tissue damage. In addition to measuring blood and synovial fluid metal ion levels, ultrasound and MRI with metal artifact reduction sequences (MARS) have been utilized to assess periarticular reactions secondary to metal wear debris. Despite metal reduction software these scans are frequently difficult to interpret. While each of these tests has merit, at the present time there is no single diagnostic test available which delineates the key issue that demands urgent surgical intervention, i.e. tissue necrosis. It is important to have a reliable test to guide surgeons and patients in the shared decision-making process of when surgical intervention is necessary to prevent disabling tissue damage. For this reason, the current study proposes an examination of preoperative serum samples of subjects in addition to synovial fluid collected during revision surgery for biomarkers that may indicate tissue necrosis. To maximize the chance of success of identifying serum biomarkers, all samples will be analyzed using multianalyte assay, biomarker tests. The purpose of the study is to develop a biomarker assay to be used as a diagnostic tool for adverse local tissue reaction, or tissue necrosis, in a metal on metal total hip replacement.

Enrollment

174 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Patients presenting for a metal on metal hip revision who have cobalt and chromium metal ion levels tested within 6 months of the date of the planned revision surgery.
Patients presenting for a metal on poly hip revision
Revision hip patients must be greater than one year postoperative
The diagnosis at the time of the index, or primary, hip replacement was osteoarthritis.
Patients who have hip osteoarthritis but have not had a total hip surgery (control)

Exclusion criteria

Patients presenting for a metal on metal hip revision who have cobalt and chromium metal ion levels tested >6 months of the date of the planned revision
Patients with a total hip on the contralateral side.
Patients with a prior history of periprosthetic infection
Revision cases where the diagnosis at the time of the index, or primary, hip replacement was not osteoarthritis.
Prisoners
Patients not willing to consent for the proposed treatment
Patients with an altered mental status
Active, concurrent metastatic infection
Active, superficial infection
Patients presenting for a metal on poly hip revision to treat trunionosis