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Methods for Acute and Subacute Murine Hindlimb Ischemia
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Patient-specific structural effects on hemodynamics in the ischemic lower limb artery
Pengcheng Xu1, Xin Liu2, Qi Song3
1Southern Medical University, Institutes of Clinical Anatomy, Guangzhou, 510515, China.
Scientific Reports
|December 16, 2016
Summary
Peripheral artery disease affects lower limb hemodynamics. Patient-specific artery models reveal that stenosis, bending, and branching significantly increase wall shear stress, aiding clinical decisions.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Medical Imaging
Background:
- Lower limb peripheral artery disease is a common chronic condition.
- Its impact on blood flow dynamics is not fully understood.
- Patient-specific arterial geometry influences hemodynamic variations.
Purpose of the Study:
- To investigate hemodynamic variations in lower limb arteries.
- To correlate these variations with patient-specific structural artery characteristics.
- To understand the role of hemodynamics in peripheral artery disease.
Main Methods:
- Computational fluid dynamics (CFD) simulations.
- Reconstruction of seven lower limb artery models from MRI data.
- Validation using Ultrasound Doppler velocimetry.
Main Results:
- Increased wall shear stress (WSS) is linked to stenosis severity, bending, and branching.
- Stenosis at bifurcations caused a 2.7 Pa WSS increase, higher than isolated stenosis (0.7 Pa) or branches (0.5 Pa).
- Popliteal artery WSS is sensitive to radius reduction; velocity and pressure gradients correlate with arterial structure.
Conclusions:
- Hemodynamic patterns are strongly influenced by arterial geometry.
- WSS distribution can be a valuable tool for assessing risk in peripheral artery disease.
- Understanding hemodynamics can aid clinical decisions to prevent ischemic events.
