ALPS VIP™ and Pin-Lock Comparative Study
February 13, 2025
ProStride™ Knee Comparative Study
A comparative study on a 59-year-old subject with over 25 years of prosthetic use, evaluating electronic knee joints, including ProStride.
Gait Analysis Comparison: Vertical Component of the Prosthetic Limb Side
In all knee joints, a complete bimodal nature is not observed. However, ProStride smoothly reaches toe-off.
ProStride provides consistent and stable support. As the patient moves through the stance phase, the knee effectively absorbs impact and maintains balance, ensuring a smooth progression.
In summary, the ProStride knee not only provides support for a stable stance but also ensures that the patient moves through this phase effortlessly, leading to a smooth and confident toe-off, which is essential for maintaining a natural gait rhythm.
Gait Analysis Comparison: Anterior- Posterior Component of the Prosthetic Limb Side
Despite there being almost no difference observed in acceleration during step crossing, ProStride shows adequate deceleration, which is necessary to control forward momentum and prepare the limb and body for the subsequent phase of gait, helping to prevent jarring impacts that could lead to instability or discomfort.
Speed of Anterior-Posterior Movement of Center of Pressure
The Speed of Center of Pressure, or COP, refers to how quickly the pressure point moves across the sole of the foot during the gait cycle. As we walk, the COP travels smoothly from the heel towards the toes. The rate at which this transition occurs provides crucial insights into the smoothness and efficiency of our walking dynamics.
In the case of ProStride, the early stance phase shows little difference in COP speed compared to other prosthetic joints, indicating a stable initial contact. However, where ProStride truly excels is during the mid-stance phase, where the COP speed accelerates smoothly. This smooth acceleration continues toward the end of the stance phase, closely mimicking the natural gait observed on the healthy side.
This seamless transition of weight from heel to toe in ProStride ensures that each step feels natural and effortless, contributing significantly to a more balanced and comfortable walking experience.
Knee Joint Angle Change
The maximum flexion angle during the swing phase with ProStride closely matches that of natural walking, approximately 60 degrees. The timing to reach this maximum flexion is consistent with other high-quality prosthetic knee joints.
ProStride demonstrates strong control over swing phase flexion limitation and its timing.
Foot Clearance
Higher knee angle velocity during the early swing phase suggests a rapid knee rise, which is necessary for a smooth and efficient gait. The foot is more distant from the ground.
This means the Prostride has a better toe clearance, reducing the risk of stumbling for a more secure step.
Study Outcomes
ALPS ProStride® Prosthetic Knee: Easy to install and intuitive to use.
Installation is straightforward, requiring just a few steps.
CONFIGURE THE SETTINGS
The intuitive user interface allows clinicians to program the knee withjust a few simple inputs. ProStride’s smart sensors automatically calibrate to the patient’s gait pattern, making adjustments quick and accurate.
FINE TUNE
Final adjustments can be made swiftly through a user-friendly app, allowing for real-time feedback and ensuring optimal performance.
This process not only saves valuable time, but also ensures that clinicians can focus more on patient care rather than on technical setup. The ProStride knee is designed to be as user-friendly as possible, allowing practitioners of all experience levels to install and program it efficiently.
