Total Hip Arthroplasty Instability and Lumbo-pelvic Kinematics: EOS Imaging Assessment of Variation in Spinal and Pelvic Parameters From Standing to Sitting
- Conditions
- Hip Fractures
- Interventions
- Other: EOS imagery
- Registration Number
- NCT03603470
- Lead Sponsor
- Centre Hospitalier Universitaire de Nīmes
- Brief Summary
The authors hypothesize that a pelvic kinematic disorder, demonstrated by a significant decrease in sacral slope, is associated with the risk of instability of total hip prosthesis, the sacral slope being measured by an EOS imaging system during the transition to sitting in unstable patients versus patients with no history of instability.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 80
- The patient must have given their free and informed consent and signed the consent form
- The patient must be a member or beneficiary of a health insurance plan
- The patient must be at least 18 years old and less than 85 years old
- Patient has a conventional first intention total hip arthroplasty (not dual mobility) by posterior approach
- "Case" patients have at least one previous episode of prosthetic dislocation repaired with surgery
- "Control" patients have no previous episode of prosthetic dislocation with more than 2 year since initial intervention
- The subject is participating in a category 1 interventional study, or is in a period of exclusion determined by a previous study
- The subject refuses to sign the consent
- It is impossible to give the subject informed information
- The patient is under safeguard of justice or state guardianship
- Patient is pregnant, parturient or breastfeeding
- Patient with lumbar instrumentation
- Patient with severe dementia (Mini Mental State Examination < 10)
- Patient with American Society of Anesthesiologists score ≥ 4
- Patient experience multiple falls
- Patient requiring early revision surgery (<15 days postoperatively
- Patient with obvious implant positioning error on an X-ray of the pelvis.
- Patient with dislocation of traumatic origin (significant kinetic trauma)
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Patients without prothesis instability EOS imagery - Patients with previous prothesis instability EOS imagery -
- Primary Outcome Measures
Name Time Method Sacral slope between standing to sitting difference between groups Day 0 Sacral slope between standing to sitting difference between groups
Rate of type 1 pelvic kinematic disorder between groups Day 0 Measured by sacral slope difference from standing to seated position \< 12°.
- Secondary Outcome Measures
Name Time Method Lumbar lordosis between standing and seating between groups Day 0 degree
Lewinnek plane (Anterior pelvic plane) between standing and seating between groups Day 0 degree
Classification of patients' pelvic kinematic disorder (Type 1 or 2) Day 0 Type 1 = Difference in sacral slope between standing and seated position \< 12° Type 2 = pelvic version \< 20° standing
Femoroacetabular flexion between standing and seating between groups Day 0 degree
Pelvic version between standing and seating between groups Day 0 degree
Classification of patients according to pelvic incidence Day 0 Presence/absence
Classification of patients according to sagittal imbalance Day 0 Presence/absence of: Sagittal Vertical Axis \> 50 mm; Spino-Sacral Angle \< 127°
Classification of patients according to sacral slope Day 0 Presence/absence
Evolution of acetabular positioning (anteversion and inclination in degree) from standing to sitting Day 0 Degree
Trial Locations
- Locations (2)
CHU Lapeyronie de Montpellier
🇫🇷Montpellier, France
CHU Nimes
🇫🇷Nîmes, France