A Multi-centre Study to Assess the Long-term Performance of the DePuy ASR™ System in Primary Hip Resurfacing Surgery

Phase 4

Terminated

• Conditions: Rheumatoid Arthritis; Post-traumatic Arthritis; Collagen Disorders; Nonunion of Femoral Fractures; Slipped Capital Femoral Epiphysis; Avascular Necrosis; Congenital Hip Dysplasia; Osteoarthritis
• Interventions: Device: DePuy ASR Hip System

• Registration Number: NCT00208377
• Lead Sponsor: DePuy International

Brief Summary

The purpose of this study is to monitor the performance and determine the metal ion release of the DePuy ASR™ System in the treatment of patients with hip joint disease requiring hip resurfacing surgery. Patients who enter the study will be evaluated at regular intervals following hip surgery using patient, clinical and x-ray assessments. A subset of patients will also have blood samples taken at regular intervals to allow the metal ion levels to be determined and undergo scans to allow the bone mineral density of the bone surrounding the implant to be monitored.

DePuy decided to close this Study in 4Q 2009. The Study was terminated with effect from December 2010 to allow for the completion of the 5 year follow up assessments.

Please note that subsequent to this decision DePuy voluntarily recalled the ASR products on 24 August 2010. Additional information regarding this voluntary recall and the follow-up of patients affected by the recall can be found at the following links http://www.mhra.gov.uk/Publications/Safetywarnings/MedicalDeviceAlerts/CON079157 and http://www.depuy.com/countries_list.

Detailed Description

Not available

Study Timeline

• Study Start: 2003-07
• Study First Submitted: 2005-09-13
• Study First Submitted QC: 2005-09-13
• Study First Posted: 2005-09-21
• Primary Completion: 2010-12
• Study Completion: 2010-12
• Status Verified: 2017-06
• Last Update Submitted: 2017-06-23
• Last Update Posted: 2017-06-26

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 228

Inclusion Criteria

i) Male or female subjects, aged between 18 and 65 years inclusive.

ii) Subjects with current indications for standard metal-on-metal (MoM) hip resurfacing arthroplasty suitable for cementless fixation in the acetabulum. These include pain, deformity, and loss of function, which are not responsive to medical treatment.

iii) Subjects who are able to give voluntary, written informed consent to participate in this investigation and from whom consent has been obtained.

iv) Subjects, who, in the opinion of the Investigator, are able to understand this investigation, co-operate with the investigational procedures, and are willing to return to the hospital for all the required post-operative follow-ups.

Exclusion Criteria

i) Subjects who, in the opinion of the Investigator, have an existing condition that would compromise their participation and follow-up in this study.

ii) Subjects with proven significant osteoporosis and poor bone quality.

iii) Subjects with compromised renal function.

iv) Subjects with proven metal sensitivity.

v) Subjects with infectious, highly communicable diseases, which may limit follow-up i.e. active tuberculosis, hepatitis, immuno-compromised conditions, etc.

vi) Women who are pregnant.

vii) Subjects who are known drug or alcohol abusers or with psychological disorders that could affect follow-up care or treatment outcomes.

viii) Subjects who have participated in a clinical study with an investigational product in the last 6 month(s).

ix) Subjects who are currently, or have been in the last 12 months, participating in a clinical study which involves exposure to ionising radiation.

x) Subjects who are currently involved in any injury litigation claims.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
DePuy ASR Hip System	DePuy ASR Hip System	A metal-on-metal bearing surface replacement system for use in resurfacing hip arthroplasty

Primary Outcome Measures

Name	Time	Method
Kaplan-Meier survivorship calculated annually	Annually

Secondary Outcome Measures

Name	Time	Method
UCLA Activity Score	3 months, 6 months and then annually
WOMAC Score	3 months, 6 months and then annually
Harris Hip Score	3mths, 1yr, 2 yrs, 5yrs, 10yrs and 15yrs post-surgery
Metal ion analysis in whole blood	3mths, 1yr, 2yrs and 5yrs post surgery
Activity Assessment	3 months, 6 months and then annually
Bone mineral density (DEXA)	pre-discharge, 3mths, 1yr, 2yrs and 5yrs post-surgery
Radiographic analysis	pre-discharge, 3mths, 1yr, 2 yrs, 5yrs, 10yrs and 15yrs post-surgery

Trial Locations

Locations (3)

Bundesknappshaft Klinik; 🇩🇪 Puettlingen, Germany

Sportsmed SA; 🇦🇺 Stepney, Australia

Epsom General Hospital; 🇬🇧 Surrey, United Kingdom