Revascularization Enhances Walking Dynamics in Patients with Peripheral Artery Disease

Area of Science:

• Biomedical Engineering
• Orthopedics
• Vascular Surgery

Background:

• Peripheral artery disease (PAD) restricts lower limb blood flow, increasing gait variability and fall risk.
• Surgical revascularization aims to restore blood flow, but its impact on limb function and gait variability in PAD patients is not well understood.

Purpose of the Study:

• To investigate changes in gait variability and limb range of motion (ROM) in PAD patients following revascularization surgery.
• To determine if surgical restoration of blood flow enhances lower limb function and motor control.

Main Methods:

• Thirty-three PAD patients with claudication underwent kinematic data collection using motion capture before and after revascularization surgery.
• Analysis included linear and nonlinear variability of angular sagittal movements at the ankle, knee, and hip joints during treadmill walking.

Main Results:

• Knee joint sample entropy (SampEn) decreased post-surgery, indicating improved gait regularity.
• Hip ROM decreased significantly, while knee ROM increased significantly; ankle ROM remained unchanged.
• The ankle joint exhibited greater changes in the Lyapunov Exponent (LyE) compared to hip and knee joints.

Conclusions:

• Revascularization surgery in PAD patients improves knee ROM and gait regularity, suggesting enhanced limb function and motor control.
• The lack of change in ankle ROM highlights the necessity for specific post-operative strengthening exercises to optimize ankle function.