Arthropathy of Knee Clinical Trial
Official title:
Validation of Consumer Activity Monitors in Postoperative Total Arthroplasty Patients
Mobilization and rehabilitation are essential components of a successful functional recovery following total hip and knee arthroplasties. Currently, we have no good measure of how mobile patients are after their surgery. Recent technological advances in personal activity monitors, such as the Fitbit, might provide medical providers and patients the opportunity to more objectively monitor their postoperative mobility and recovery course. However, these consumer activity monitors have yet to be validated in terms of their accuracy and utility for monitoring mobility in the immediate postoperative setting in arthroplasty patients. Our goal is to validate one of the most popular consumer activity monitors, the Fitbit Zip, in the postoperative total joint arthroplasty patient population.
Early mobilization following total hip and knee arthroplasty surgeries is important in
decreasing the risk of complications such as deep venous thrombosis, pulmonary embolus,
pneumonia, and urinary retention. It is also generally accepted that early mobilization may
help prevent late complications such as joint stiffness or arthrofibrosis. Aside from these
complications, patient satisfaction and length of hospital stay both seem to be correlated
with early mobilization with poor mobility negatively impacting both outcomes. Therefore, it
is important for clinicians to ensure that patients are adequately mobilizing in the
immediate postoperative period to promote a successful recovery after total hip or knee
arthroplasty.
Consumer activity monitors are generally manufactured to be used in a relatively healthy,
ambulatory population. Their accuracy has been validated in multiple studies in healthy
subjects in a variety controlled settings. Based on these validity studies, it is clear that
some of these consumer activity monitors have worse accuracy in certain situations, such as
slower-paced walking or in people using assistive devices for ambulation, such as canes. The
limitations of these devices in these settings could be problematic for monitoring
post-arthroplasty patients since all these patients ambulate slowly, with an altered gait,
and with a walker. No studies to date have looked at the accuracy of consumer activity
monitors in the immediate postoperative arthroplasty population.
The consumer activity monitor market is rapidly evolving and changing, so much so that
monitors used just last year might be obsolete this year. Therefore, rather than examining
the accuracy of one device versus another, it is more applicable to determine what location
is most accurate for placement of these monitors to help providers counsel patients on proper
use postoperatively.
Our goal for this study is to validate and to determine the best location for placement of
the Fitbit Zip in the postoperative total joint arthroplasty patient population.
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