Self-Aligning Stent Grafts for Curved Vessel Navigation

The patent applies parameter changes by transitioning from sharp apices to blunt apices on the stent graft. This morphological parameter change maintains the anchoring function while eliminating the harmful puncture effect. The blunt apices provide sufficient radial force for secure positioning without concentrating stress at sharp points that could penetrate the vessel wall.

The patent converts the potential harm of sharp apices into benefit by deliberately designing blunt apices that distribute force over a larger area. This design choice transforms what could be a dangerous sharp point into a safe, force-distributing surface that still provides effective anchoring through increased contact area with the vessel wall.

The patent applies dynamics by making the delivery catheter flexible rather than rigid. This allows the catheter to adapt its shape dynamically as it navigates through curved vessels, while the stent graft itself maintains its structural integrity through its self-expanding framework. The flexible catheter can bend and conform to vessel geometry without compromising the stability of the delivered device.

The patent applies segmentation by separating the delivery catheter from the stent graft structure. The catheter serves as a temporary delivery vehicle that can be flexible and adaptable, while the stent graft is the permanent implant that requires structural stability. This segmentation allows each component to be optimized independently - the catheter for flexibility and the graft for stability.

The patent applies self-service through the self-expanding mechanism of the stent graft. The graft is delivered in a compressed state within the catheter and then spontaneously expands to its full diameter upon deployment, using its own stored elastic energy rather than requiring external high forces. This self-service expansion achieves proper positioning and apposition to the vessel wall without subjecting the vessel to damaging external forces.

The patent applies preliminary action by pre-compressing the stent graft within the delivery catheter before delivery. The graft is prepared in advance in a low-profile, compressed configuration that allows easy delivery through the catheter. Once positioned, the pre-stored elastic energy in the compressed graft automatically drives the expansion process, eliminating the need for high external forces during deployment.