EO Footprint as a Landmark During DAA THA

NCT04623073 | Completed

• 1 other identifier: S63944
• Study Type: observational
• Target: 135
• Locations: 1 country
• Sites: 1

Brief Summary

One of the goals of Total Hip Arthroplasty (THA) is to reconstruct leg length as adequately as possible. In order to achieve this one needs landmarks that are visible both on the templating X ray as well as during surgery. The classical posterior and lateral approaches often rely on the distance from the greater trochanter (GT) to the shoulder of the femoral stem or the distance from the lesser trochanter (LT) to the side of the neck osteotomy. If the surgeon finds out on the digital template that the distance from the GT to the shoulder of the implant should be X mm to achieve equal leg length, than the surgeon can try to reconstruct this during surgery. During the Direct Anterior Approach (DAA) these landmarks usually are not visible or require additional dissection injuring important soft tissue structures along the way. One anatomical structure that appears to be always visible during the DAA is the External Obturator tendon (EO). It was recently confirmed that the level of insertion of the EO onto the proximal femur can also always be determined on pre-operative X rays. It therefore represents one of the few landmarks that is visible both on the templating X ray as well as during DAA THA. Indeed, many hip surgeons, including ourselves, believe that if the shoulder of the femoral stem is near the insertion of the EO leg length cannot be far off. However, there is no clinical data to support this. The investigators would therefore like to the correlate the distance observed intra-operatively to the actual established distance on the post-operative X ray.

Conditions

Coxarthrosis

Keywords

Total hip Arthroplasty; leg length; templating; direct anterior approach; external obturator footprint

Outcome Measures

Primary Outcomes (1)

• Correlation between the distance measured intra-operatively and presumed distance on the pelvic radiographs

  2 days

Secondary Outcomes (2)

• Visibility of the EO tendon intra-operatively

  2 days

• Inter and intra-rater reliability

  2 days

Study Arms (1)

Patients who underwent DAA THA

Patients who underwent DAA THA by a single surgeon who routinely documents the distance from the should of the stem to the upper end of the EO footprint

Procedure: Total Hip arthroplasty via a Direct Anterior Approach

Interventions

Total Hip arthroplasty via a Direct Anterior Approach PROCEDURE

Total Hip arthroplasty via a Direct Anterior Approach

Patients who underwent DAA THA

Eligibility Criteria

• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

All patient who underwent THA via DAA by a single surgeon who routinely documents the distance from the shoulder of the stem to the upper border of the EO tendon

You may qualify if:

• All patient who underwent THA via DAA by a single surgeon who routinely documents the distance from the shoulder of the stem to the upper border of the EO tendon

You may not qualify if:

• Distance not noted
• No radiographs available

Sponsors & Collaborators

• Universitaire Ziekenhuizen KU Leuven: lead

Study Sites (1)

University Hospitals Leuven - Gasthuisberg

Leuven, 3000, Belgium

Location

Related Publications (2)

• Rudiger HA, Fritz B, Impellizzeri FM, Leunig M, Pfirrmann CW, Sutter R. The external obturator footprint as a landmark in total hip arthroplasty through a direct anterior approach: a CT-based analysis. Hip Int. 2019 Jan;29(1):96-101. doi: 10.1177/1120700018761320. Epub 2018 May 21.

  PMID: 29783889 BACKGROUND

• Vles G, Meynen A, De Mulder J, Ghijselings S. The External Obturator Footprint Is a Usable, Accurate, and Reliable Landmark for Stem Depth in Direct Anterior THA. Clin Orthop Relat Res. 2021 Aug 1;479(8):1842-1848. doi: 10.1097/CORR.0000000000001799.

  PMID: 33944807 DERIVED

MeSH Terms

Conditions

Osteoarthritis, Hip

Condition Hierarchy (Ancestors)

Osteoarthritis; Arthritis; Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 3, 2020
• First Posted: November 10, 2020
• Study Start: January 1, 2021
• Primary Completion: April 29, 2021
• Study Completion: April 29, 2021
• Last Updated: June 27, 2024

Record last verified: 2023-12

Data Sharing

• IPD Sharing: Will not share

Locations

BE (1)