Research/Cardiovascular Biomechanics/03 / 03

Venous Hemodynamics and Intermittent Pneumatic Compression

Intermittent pneumatic compression applies time-dependent external pressure to the lower limb and alters tissue deformation and venous blood flow. We develop computational models to quantify the coupled effects of compression settings, tissue mechanics, and venous-network dynamics. Our framework combines one-dimensional deformable blood-flow models, three-dimensional tissue mechanics, and lumped-parameter venous networks to simulate full compression cycles in simplified and subject-specific geometries. These models support mechanics-based assessment of venous flow, pressure, and wall shear stress under different device and patient conditions.

A translucent lower limb with its venous network, the chamber pressure rising, tissue and lumen deforming, and flow rising again on release — A subject-specific lower limb with skin, muscle and bone rendered translucent, showing the venous network that carries the flow.

Multi-Fidelity Modeling of Compression-Induced Flow

We couple one-dimensional deformable venous flow with three-dimensional tissue mechanics and an upstream lumped-parameter network to represent the interaction between external compression, tissue deformation, and venous transport. This multi-fidelity formulation enables full-cycle simulations of intermittent pneumatic compression at substantially lower computational cost than full three-dimensional fluid–structure interaction models.

Lower-limb cross-section with the compression chambers, the two-way link between 3D tissue mechanics and 1D venous flow, the upstream lumped-parameter network, and a comparison of results and cost against full 3D FSI — The two-way link between the three-dimensional tissue under external compression and the one-dimensional venous flow domain: the tissue sets the lumen area, and the flow returns a pressure.

Effects of Compression Parameters

We perform parametric analyses to determine how peak compression pressure, hold duration, chamber configuration, and actuation conditions affect lumen deformation, venous flow, pressure, and wall shear stress. Under the investigated conditions, peak pressure and hold duration are the principal determinants of the hemodynamic response. Increased pressure produces greater lumen narrowing and flow variation, whereas a longer hold duration promotes distal blood accumulation and increases peak flow and pressure during release. Chamber number has a smaller influence when the chambers operate under uniform actuation conditions.

The ramp-up, hold and release pressure waveform above; vein cross-sections at low and high pressure below it; and flow rate, pressure and wall shear stress compared at the foot — Chamber pressure over a ramp-up, hold and release cycle, with the von Mises stress it produces in the limb tissue and the venous pressure and flow rate at the same instant.

Tissue Mechanics and Subject-Specific Response

We examine how lower-limb tissue properties affect compression-induced deformation and venous hemodynamics. More compliant tissues exhibit greater deformation and stronger changes in venous flow, pressure, and wall shear stress. Subject-specific geometries and tissue composition allow the framework to evaluate inter-individual variation and provide a basis for patient-specific assessment of compression strategies.

Subject-specific lower-limb geometry from medical images, tissue displacement before and during compression, and the venous pressure and flow-rate distribution at the same instant — A subject-specific limb reconstructed from medical images, with the venous network visible through the surrounding muscle.

Experimental Comparison

Ultrasound measurements of femoral venous velocity and cross-sectional area are used to compare the predicted and observed responses to intermittent pneumatic compression. This comparison provides experimental support for the simulated changes in venous flow and vessel deformation.

Selected work

2026

Computational investigation of intermittent pneumatic compression operating parameters and tissue mechanics in lower-limb venous hemodynamics

Computers in Biology and Medicine 212:111767

2026

Efficient multi-fidelity fluid-structure interaction modeling for pulsatile blood flow in deformable biological tissues

Annals of Biomedical Engineering

Cardiovascular Biomechanics3 topics in this area

Coronary Hemodynamics and Ischemic Heart Disease Abdominal Aortic Aneurysm Hemodynamics and MechanicsVenous Hemodynamics and Intermittent Pneumatic Compression