After a total hip replacement (THR) surgery, the number one thing we desire as patients is a speedy recovery so we can return to our day-to-day life as soon as possible—playing with the kids, taking a walk outside, and getting together with family and friends.
THR Recovery Backed By Data.
At OneStep, we've developed an innovative, state-of-the-art feature that analyzes several variables ultimately guiding you through your THR recovery process. First, it measures the patient's movement over the first 100 days post-operation. We then convert that data into a gait analysis that is instantly shared with the patient.
With an up-to-date, lab-quality gait analysis in your pocket, we can monitor a patient's current physical state, the course of their physical therapy journey with us, and the total sum of their progress and improvement.
We measure five main parameters: number of steps per minute, stride length, stride symmetry, double support factor, and the consistency score.
We begin by measuring the number of steps per minute in relation to the patient's speed.
Considering that a patient is primarily immobile after surgery, this information allows us to monitor how the step-rate value increases over the following 3-4 weeks of recovery, before stabilizing at a consistent pace. We've found a good step-per-minute rate is 80 steps per minute.
In addition, we can see the same performance metrics for stride length, which represents the measurement of two opposing steps. Our THR patients (understandably) tend to take smaller steps after the surgery, and then shift into wider strides as healing progresses. A good stride length is 100 cm (3 ft, 3 inches) per stride.
Asymmetry is the most natural parameter to measure and the one our patients tend to find the most motivating. We calculate the difference between the time spent on the leg that the phone rests on and the opposite leg. The ideal asymmetry score is zero—meaning your gait is perfectly balanced. Our patients have an asymmetry score converging to zero over time.
The double support factor, when both feet are placed on the ground, represents the time that the patient spends with two feet on the floor. For a healthy walk score, it means ⅓ of a stride. Our patients have double support from 40-45% after the surgery, reaching approximately 35% 100 days after.
The last variable that we analyze is the consistency score. It represents how similar each stride is to the other. For example, a patient does not take consistent steps after surgery, but tends to improve enormously over 30 days before stabilizing completely—the best consistency score is 80.
All these parameters allow us to monitor our patients' recovery journeys.
As a result, our feedback is accurate and personalized according to each patient's progress - from surgery until recovery. To see your unique lab grade gait analysis, download OneStep now.