ePTFE Artificial Blood Vessel With Alternating Density for Flexibility

The patent applies local quality by creating alternating high-density and low-density regions along the axial direction of the artificial blood vessel. The high-density regions have compressed and densely packed nodes and fibrils, while the low-density regions have more spaced-out structures. This local variation in density allows different sections of the vessel to have different mechanical properties, enhancing overall flexibility while maintaining structural integrity.

The patent segments the artificial blood vessel into alternating high-density and low-density regions along its length. This segmentation creates a structure where compressible sections (low-density regions) and supportive sections (high-density regions) are distributed throughout, enabling the vessel to bend and flex more easily while maintaining its shape and functionality.

The patent segments the vessel wall into alternating high-density and low-density regions. The high-density regions provide structural support and strength, while the low-density regions provide flexibility and compressibility. This segmentation allows the vessel to achieve both density and flexibility simultaneously by distributing different density characteristics throughout its structure.

The patent applies local quality by creating spatial variation in density along the axial direction. High-density regions with compressed nodes and fibrils are interspersed with low-density regions with more spaced structures. This local differentiation allows the vessel to have high density in areas requiring strength and low density in areas requiring flexibility, resolving the contradiction between density and flexibility.

The patent segments the vessel into alternating high-density and low-density regions that repeat along the axial direction. The high-density regions act as structural anchors that maintain shape retention, while the low-density regions provide the flexibility needed for easy anastomosis. This segmented structure allows the vessel to bend and conform during surgery while returning to its original shape afterward.

The patent applies local quality by creating spatially varying density characteristics throughout the vessel wall. The high-density regions with compressed nodes and fibrils provide structural stability and shape retention, while the low-density regions with more spaced structures provide flexibility and ease of manipulation during anastomosis procedures. This local differentiation resolves the contradiction between shape retention and ease of operation.