Coxarthrosis Clinical Trial
Official title:
The Influence of Global Femoral-offset Changes After Total Hip Arthroplasty on Function, Quality of Life and Abductor Muscle Strength: a Prospective Cohort Study
The femoral-offset (FO) is one of the important perioperative parameters in THA. A
prospective cohort study was conducted between September 2010 and December 2013. All
patients with unilateral primary osteoarthritis (OA) treated with THA were considered for
inclusion. Patients with secondary OA, previous spinal, pelvic, or lower limb injuries or
fractures were excluded. Global FO was measured in each patient within 3 months before the
THA and at the second postoperative day using a standardized protocol. According to the
postoperative measurement, patients were divided into three groups: 1) the decreased FO
group, where the FO of operated side was reduced more than 5mm compared with the
contralateral side, 2) the restored FO group, where the FO of operated side was within 5mm
restored compared with the contralateral side, and 3) the increased FO group, where the FO
of operated side was increased more than 5mm compared with the contralateral side.
Patients were followed-up at 12 - 15 months postoperatively with self-administered WOMAC and
EQ-5D questionnaires in addition to a clinical assessment with palpation of the operated hip
and measurement of the abductor muscle strength.
The results of total hip arthroplasty (THA) have shown great improvement during the last
decades in terms of function, quality of life and prosthetic survival. Beside pain relief,
surgeons aim to position the stem and cup in a correct manner to restore the biomechanical
forces and range of motion of the operated hip. The femoral-offset (FO) is one of the
important perioperative parameters in THA. A prospective cohort study was conducted between
September 2010 and December 2013. All patients with unilateral primary osteoarthritis (OA)
treated with THA were considered for inclusion. Patients with secondary OA, previous spinal,
pelvic, or lower limb injuries or fractures were excluded. Global FO was measured in each
patient within 3 months before the THA and at the second postoperative day using a
standardized protocol. According to the postoperative measurement, patients were divided
into three groups: 1) the decreased FO group, where the FO of operated side was reduced more
than 5mm compared with the contralateral side, 2) the restored FO group, where the FO of
operated side was within 5mm restored compared with the contralateral side, and 3) the
increased FO group, where the FO of operated side was increased more than 5mm compared with
the contralateral side.
Patients were followed-up at 12 - 15 months postoperatively with self-administered WOMAC and
EQ-5D questionnaires in addition to a clinical assessment. Patients completed an additional
questionnaire enquiring about any residual problems with the use of walking aid and residual
pain around the operated hip. During the clinical assessment, palpation of the operated hip
and measurement of the abductor muscle strength were undertaken.
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Observational Model: Cohort, Time Perspective: Prospective
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