The main objective is to identify variations in the peak hip abduction moment after total hip arthroplasty with either the Optimys or the CBH in varus and valgus hips. Secondary objective are other kinematic and spatiotemporal parameters. Also, a…
ID
Source
Brief title
Condition
- Joint disorders
- Bone and joint therapeutic procedures
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
The main parameter of this study will be the peak hip abduction moment, as the
abductors of the hip will be most affected if the FAO is not restored properly
(<5mm).
Secondary outcome
Kinematics: Hip abduction/adduction moment, hip range of motion in the
frontal/sagittal plane, pelvic tilt range of motion, peak hip
extension/flexion, peak hip internal/external rotation
Spatiotemperal variables: walking speed (at self-paced speed), stride length,
cadence, step length, stance duration, single support, double support, cycle
duration
Neuromuscular parameters: EMG of the hip abductors and muscle strength of the
abductors.
Background summary
14-22% of the patients still have some complains after total hip arthroplasty.
Restoration of femoro-acetabular offset (FAO) and center of rotation (COR)
seems to be an important predictor of success for the clinical outcome of total
hip arthroplasty. If not restored correctly, it might have influence on patient
outcomes and survival outcome of the total hip arthroplasty. Especially in
varus and valgus hips, the FAO can be difficult to restore. Nowadays there are
different types of implants, each with their own advantages. One of the
advantages of the short stem is its shape, which follows the medial side of the
femoral calcar, thus following the anatomical neckline of the femur better than
a conventional stem could. Previous research by our own group showed that the
short stem is more capable of restoring the FAO in varus and valgus hips than a
conventional stem. The FAO has the most influence on the hip abduction moment,
if the FAO is decreased more than 5mm this affect the lever of the hip
abductors. This requires more strength from the abductor muscles, which
generally cannot be produced and causes limping during gait. This study will
help to see if there is a difference in gait after total hip replacement
between a short stem and conventional stem.
Study objective
The main objective is to identify variations in the peak hip abduction moment
after total hip arthroplasty with either the Optimys or the CBH in varus and
valgus hips. Secondary objective are other kinematic and spatiotemporal
parameters. Also, a patient reported outcome measurement score, HOOS, will be
compared with gait pattern to see if there are clinical worse outcomes if gait
is insufficient.
Study design
This is a case-matched observational pilot study. Gait analysis will be
conducted in the innovative Gait Real-Time Analysis Interactive Lab (GRAIL) in
the VU Medical Centre.
Study burden and risks
Patients will be seen one time at the VU medical centre for gait analysis.
Patients will walk on a split-belt treadmill in the gait lab for 30 minutes,
posing minimal risk. GRAIL is a safe and reliable system. Fall prevention will
be provided with a safety vest and the treadmill will immediate stop after
stumbling. Furthermore, the physical burden will be minimal; walking distance
will not be longer than a patient can walk without experiencing pain/more pain
than usual. An extra questionnaire (HOOS) will be given at the appointment,
which cost an extra 10 minutes of the patients time.
Olympiadelaan 6
Amstelveen 1183WN
NL
Olympiadelaan 6
Amstelveen 1183WN
NL
Listed location countries
Age
Inclusion criteria
* Participant in either the Optimys (NL47055.048.13) or CBH trial (NL48211.048.14
* Charnley A score
* Operating technique: direct lateral or anterolateral
* CCD-angle <120° or > 135°
Exclusion criteria
* Other conditions that influence walking patterns
* BMI>35
* Dysplasia or avascular necrosis of the hip which influences center of hip rotation
* Primary trauma, such as collum fracture, which could influence osteostomy cut of the femoral neck
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| CCMO | NL62668.048.17 |