The Role of Iliotibial Band Stiffness Assessed by Shear-Wave Elastography in Objective and Perceived Leg Length Discrepancy After Total Hip Arthroplasty
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 68
- 试验地点
- 1
- 主要终点
- Harris Hip Score
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 90 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •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
排除标准
- •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
研究组 & 干预措施
Postoperative Follow-up Cohort
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.
干预措施: Shear-Wave Elastography (Ultrasound) (Diagnostic Test)
结局指标
主要结局
Harris Hip Score
时间窗: At least 12 months postoperatively
Oxford Hip Score
时间窗: At least 12 months postoperatively
HOOS score
时间窗: At least 12 months postoperatively
Hip Disability and Osteoarthritis Outcome Score
次要结局
- leg length difference(At least 12 months postoperatively)