Article

In order to verify whether orthostatic posturography (OP) can support clinical
assessment of total hip (THA) and knee arthroplasty (TKA), 81 subjects with THA
and 100 with TKA were recruited and compared with 59 healthy volunteers. All
patients were tested one or two days prior to surgery; 42 subjects (20 THA and 22
TKA) were tested again after six months, and 34 (14 THA and 20 TKA) yet again
after 12 months. OP was performed using a Kistler 9286A piezoelectric force plate
and the following postural parameters (PPs) were adopted on account of their
functional meaning: mean velocity and the root mean square of the distance of the
centre of pressure (CoP), sway area, and 95% of the CoP power frequency. Eye
condition and fatigue related to the test duration were also examined. The three
most meaningful PPs were identified and a logarithmic transformation was then
applied to these, as well as standardization. Almost all the PP values were
higher preoperatively in the patients as compared with the healthy subjects and
it was possible to detect many statistically significant differences between
patients and healthy subjects. However, when examining the 181 subjects at the
preoperative stage, the PPs did not show congruence with the clinical scores as
well as they did during follow-up. Therefore, the use of the OP is not
recommended to monitor patients undergoing THA or TKA.
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Langue : ANGLAIS