Kivonat:
AbstractIntroduction, objective Gait analysis has provided
important information about the variability of gait for patients
prior to and after total hip arthroplasty (THA). The objective
of this research was to clarify how the method of exposure in
total hip arthroplasty affects the variability of gait.
Materials and method Gait analysis was performed at 0.8 m/s, 1.0
m/s, and 1.2 m/s on 25 patients with direct-lateral exposure
(DL), 22 with antero-lateral exposure (AL) and 25 with posterior
exposure (P) during total hip arthroplasty. The control group
was represented by 45 healthy subjects of identical age. Gait
analysis was performed pre-operatively and 3 and 6 months after
the surgery. Gait parameter variability was characterized by the
coefficient of variance (CV) of spatial–temporal parameters and
by the mean coefficient of variance (MeanCV) of angular
parameters. Results The variability of gait tends to reach
control values during the first 6 months of the postoperative
period in all three patient groups. Six months after THA, in
patients operated with DL and AL exposure the variability of
gait differs significantly from control values; however, in
patients operated with P exposure, the variability of spatial–
temporal and angular parameters – except the rotation of pelvis
– was similar to that of controls. Discussion, conclusion The
type of surgical technique significantly influences the
variability of gait. Difference in the variability of angular
parameters predicts gait instability and increased risk of
falling after THA without the joint capsule preserved. Joint
capsule preservation ensures a recovery of gait variability. It
should be taken into account when compiling rehabilitation
protocols. Differences related to the method of exposure should
be considered when abandoning therapeutic aids.
