Metal Ion Serum Concentrations in Patients With Total Hip Replacements

June 28, 2012 updated by: The University of Texas Health Science Center at San Antonio

Cobalt, Chromium and Titanium Serum Concentrations in Patients With Metal-on-Metal vs. Metal on Polyethylene Total Hip Replacements

Other research studies have shown that the levels of metals in the blood are slightly increased after patients receive a total hip replacement. We want to learn whether these elevated levels are associated with any adverse effects. We hope this study will help us identify which type of patients have elevated levels of metal in their blood.

Study Overview

Status

Terminated

Conditions

Detailed Description

It is suspected that the concentration of the metals chromium, cobalt and titanium in the blood will be higher in people with an all metal total hip prosthesis than in those with a plastic and metal prosthesis. To find out if this is true, we will test blood samples for the levels of metal in the blood and compare the values from 3 groups of people:

  1. people with metal on metal hip replacements
  2. loosening of a plastic and metal prosthesis and
  3. evidence of osteoarthritis and are awaiting a total hip replacement.

Study Type

Observational

Enrollment (Actual)

5

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Local surgeon's patients who have had a hip implant.

Description

Inclusion Criteria:

Group 1 - unilateral hip replacement with metal on metal prosthesis, well functioning.

Group 2 - loosening of plastic and metal prosthesis Group 3 - osteoarthritis of the hip and awaiting total hip replacement

Exclusion Criteria:

  • renal dysfunction
  • other types of metal implants or dental prostheses
  • rheumatoid arthritis
  • hip infection

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The University of Texas Health Science Center at San Antonio

Collaborators

DePuy Orthopaedics

Investigators

  • Principal Investigator: Lorence Trick, MD, University of Texas Health Science Center Department of Orthopaedics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

August 1, 2004

Primary Completion (Actual)

May 1, 2010

Study Completion (Actual)

May 1, 2010

Study Registration Dates

First Submitted

September 7, 2005

First Submitted That Met QC Criteria

September 7, 2005

First Posted (Estimate)

September 12, 2005

Study Record Updates

Last Update Posted (Estimate)

July 2, 2012

Last Update Submitted That Met QC Criteria

June 28, 2012

Last Verified

June 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 045-0031-006

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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