Minimally Invasive Surgery of the Hip Versus Standard Approach

This study has been completed.
Zimmer, Inc.
Information provided by (Responsible Party):
Ottawa Hospital Research Institute Identifier:
First received: November 30, 2005
Last updated: October 24, 2011
Last verified: October 2011
The purpose of this study is to determine if there is a difference in terms of length of hospital stay and post-operative outcomes between patients whose total hip replacement surgery is performed with a minimally invasive versus standard surgical approach.

Condition Intervention
Hip Arthroplasty
Procedure: minimally invasive total hip arthroplasty
Procedure: Standard

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Subject)
Official Title: Minimally Invasive Surgery of the Hip: A Randomized Study

Resource links provided by NLM:

Further study details as provided by Ottawa Hospital Research Institute:

Primary Outcome Measures:
  • Length of Stay [ Time Frame: Post-op ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • WOMAC SF-36 Harris Hip Get up and Go Operative Details Post-operative Complications [ Time Frame: Pre-op, 6, 12, 24 months post-op ] [ Designated as safety issue: No ]

Estimated Enrollment: 40
Study Start Date: June 2003
Study Completion Date: May 2011
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: MIS
Minimally invasive hip surgery
Procedure: minimally invasive total hip arthroplasty
minimally invasive total hip arthroplasty
Other Name: non applicable
Active Comparator: Standard
Standard approach to hip surgery
Procedure: Standard
standard approach hip surgery
Other Name: non applicable

Detailed Description:
Traditional techniques for total hip arthroplasty (THA) require complete visualization of the acetabulum and proximal femur since anatomic landmarks are crucial for correct orientation of the prosthetic components. All surgeons are taught that a wide surgical exposure is one of the most important factors in performing successful THA. Traditionally, it was impossible to achieve accurate fixation and orientation of the components without complete visualization of bony landmarks. These extensile exposures facilitate accurate implant alignment, but at the expense of more extensive soft tissue dissection. Little clinical research has been undertaken to relate the surgical approach to postoperative complications or patient function. Furthermore, despite the good overall results of THA, the recovery time to improved function can be lengthy. Blood loss is expected to be directly related to the extent of the surgical exposure and to influence patients outcomes. Based upon these facts, an important principle of arthroplasty surgery is to minimize the amount of soft tissue trauma while being able to achieve the surgical goal of reconstructing the arthritic hip joint. By definition, minimally invasive surgical (MIS) procedures result in less soft tissue disruption, which in turn should reduce pain, expedite healing, decrease recovery time, and potentially reduce the number of associated complications.

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

BMI > 30 kg/m2 No prior ipsilateral hip surgery Osteoarthritis

Exclusion Criteria:

Patients with grossly distorted bony anatomy whereby standard implants are contraindicated; i.e. congenital dysplasia of the hip, proximal femoral abnormalities, etc

Rheumatoid Arthritis

  Contacts and Locations
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Please refer to this study by its identifier: NCT00261040

Sponsors and Collaborators
Ottawa Hospital Research Institute
Zimmer, Inc.
Principal Investigator: Paul Kim, MD OHRI
  More Information

Responsible Party: Ottawa Hospital Research Institute Identifier: NCT00261040     History of Changes
Other Study ID Numbers: OHREB 2003211-01H 
Study First Received: November 30, 2005
Last Updated: October 24, 2011
Health Authority: Canada: Ethics Review Committee

Keywords provided by Ottawa Hospital Research Institute:
Total Hip Arthroplasty
Minimally Invasive Surgery

Additional relevant MeSH terms:
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases processed this record on April 27, 2016