An observational study in Postoperative Evaluation and Arthroplasty, Replacement, Hip, sponsored by Ankara Etlik City Hospital. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2026-02-24.
Sponsored by Ankara Etlik City Hospital · Observational
Patients undergoing total hip arthroplasty (THA) may experience objective or perceived leg length discrepancy (LLD/PLLD), which can negatively affect gait, pelvic balance, and patient satisfaction.
The iliotibial band (ITB) plays a critical role in lateral thigh tension transmission, and alterations in its stiffness may influence the perception of limb length discrepancy.
Shear-wave elastography (SWE) is a noninvasive ultrasound-based technique that enables quantitative assessment of soft tissue stiffness.
This cross-sectional observational study aims to investigate the relationship between ITB stiffness measured by SWE and both radiographic and perceived leg length discrepancy in adult patients who underwent unilateral primary THA at least 12 months previously.
This study will include adult patients aged 18-90 years who underwent unilateral primary total hip arthroplasty at least 12 months prior to enrollment.
Patients will undergo clinical evaluation, functional scoring, radiographic assessment, and bilateral ITB stiffness measurement using shear-wave elastography.
Radiographic leg length discrepancy will be assessed using previously obtained pelvis AP and full-leg length radiographs without additional imaging exposure.
Perceived leg length discrepancy will be evaluated using a block test during standing examination.
ITB stiffness will be measured bilaterally at standardized anatomical landmarks using SWE by two experienced radiologists.
The primary aim is to assess correlations between ITB stiffness and radiographic LLD, as well as perceived LLD. Secondary analyses will evaluate whether ITB stiffness predicts PLLD independently of radiographic LLD.
Ankara Etlik City Hospital is the lead sponsor of 166 studies on the registry; 75 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients who underwent total hip arthroplasty and had a minimum follow-up of at least 1 year were included in the study.
Age between 18 and 90 years History of unilateral primary TKA, with no prior revision surgery At least 12 months after surgery and returned to functional weight-bearing No use of walking aids, or use of a cane only for outdoor ambulation
Exclusion Criteria:
Bilateral TKA or severe osteoarthritis in the contralateral hip History of femoral, tibial, or hip surgery resulting in limb length-altering deformity Significant scoliosis (>20° Cobb angle) or pelvic obliquity >5° Neurological disorders (e.g., severe polyneuropathy, hemiparesis) History of lateral thigh surgery (e.g., IT band release, TFL surgery) Body mass index (BMI) >40 (may reduce the reliability of SWE measurements) Suspected prosthetic joint infection or implant instability
Patients who underwent surgery and were followed as part of routine postoperative care. Clinical scores and radiographic assessments were recorded during follow-up. Non-interventional ultrasound evaluation was performed in patients who had completed at least 12 months after surgery; some patients were assessed at longer postoperative intervals.
Diagnostic Test: Shear-Wave Elastography (Ultrasound)
Non-interventional ultrasound performed during routine follow-up.
Harris Hip Score
Time frame: At least 12 months postoperatively
Oxford Hip Score
Time frame: At least 12 months postoperatively
HOOS score
Hip Disability and Osteoarthritis Outcome Score
Time frame: At least 12 months postoperatively
leg length difference
Time frame: At least 12 months postoperatively
iliotibial band tension-elastogram
Time frame: At least 12 months postoperatively
Plan to share: No — Individual participant data will not be shared.
No publications or documents are linked to this record.
This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.
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Ankara Etlik City Hospital