Stents TRIZ Cases

A proximally-flaring stent uses a flanged proximal portion and dual balloon catheters to expand against main artery walls.

Pulsatile flow through a helical balloon overcomes thermoregulation, lowering core temperature by 3°C in under 30 minutes.

A stent barrier portion with controlled pore diameters filters emboli from blood flow.

Auxiliary elastic wire maintains pitch between elastic rings to prevent diagonal inclination, ensuring stable adhesion to blood vessel walls without leakage.

An extrusion process embeds conductive wires in a polymeric catheter shaft, creating reliable electrical pathways without compromising structural integrity.

A stent-graft delivery system uses a single shaft and helical tip capture spindle to convert rotation into longitudinal movement for controlled deployment.

Textured multi-filament yarns in a hollow tubular sleeve minimize inter-yarn slippage and reduce bursting pressure variability.

Inflatable expandable structures fill aneurysmal space to anchor a blood flow scaffold, preventing endoluminal leaks and migration.

Positioning arches distribute anchoring force across the vascular wall, preventing tissue damage while maintaining precise valve placement.

Laminated outer sheath combines a flexible inner layer and a strong reinforcement layer for reliable stent deployment.

Offset crown tabs on a zigzag stent body enable controlled radial expansion, reducing vessel injury during deployment through tortuous neurovascular pathways.

Diameter reducing suture loops enable precise placement of the stent graft in the ascending aorta, preventing coronary artery obstruction.

Electrode-integrated bifurcation stents apply electrical signals to blood vessel walls to induce nitric oxide secretion.

Dynamic suspension flow cultures vascular endothelial cells on intravascular stents to ensure sufficient surface adherence.

A tapered hollow tubular implant redirects blood flow to ischemic areas using the Bernoulli effect.

A shape-memory stent guides food past the stomach to minimize nutrient absorption.

Segmented stent end design increases flexibility to resolve deployment accuracy and radial strength trade-offs.

Expandable Nitinol main body and prongs provide continuous access lumen, while hemostatic barrier prevents fluid leakage through puncture site.

Ratchet slide mechanism controls outer sheath displacement to resolve poor incremental deployment precision in vascular prosthesis placement.

A repositionable endograft uses retractable retention tines to secure the device within irregular vessel anatomy during deployment.

Variable stiffness and wall thickness in the pusher catheter prevent axial deviation and stent deformation during bile duct placement.

Three upper arms on a self-expandable nitinol stent provide coronary access while lower tags ensure precise orientation during transcatheter implantation.

Closed-cell sinusoidal struts resolve the strength-degradation trade-off by maintaining radial force while ensuring predictable polymer breakdown.

Tapered bore apparatus deforms stent distal end to anchor ostium, preventing vessel occlusion.

Converging struts route clots to the center for dissolution, and penetrating hooks anchor without vessel damage.

A flexible surgical instrument system uses a driving backbone structure to enable arbitrary direction turning and linear motion.

An expandable tubular stent applies continuous radial force to prevent obstructive scar tissue formation and restenosis at the sinus ostium.

Orthogonal delivery and dynamic anchoring elements resolve catheter diameter limits while securing larger valves in the native annulus.

A vascular filter uses a wave pattern support hoop and curved capture arms to secure thrombi within the inferior vena cava.

Segmented coil and braid structures enable reliable aneurysm occlusion while maintaining catheter pushability.

A nonexpandable stent uses a shape memory alloy reinforcement member to transition from delivery to deployment configuration.

A wire collection device uses a spiral groove to vary the retraction diameter and maintain consistent rotating force.

Segmented sheath design reduces access pathway size while maintaining stable device positioning during reaccess procedures.

A vascular micrograft delivery system enables secure advancement and retrieval of a polymeric implant through tortuous vessels.

Integrated dual-channel endoscope enables reliable guide wire insertion into the biliary tract without requiring multiple scopes or complex equipment swaps.

A degradable metal implant uses a counter-electrode and voltage source to manage its degradation rate through electrochemical reactions.

An integrally formed nitinol joint assembly creates a friction-fit lock between shaft and cage components.

A bioresorbable conduit uses weakened exterior areas to enable controlled vascular cell infiltration and tissue repair.

Segmenting the sheath into a peelable distal portion and reinforced proximal segment reduces preloaded length while maintaining kink resistance.

A flared stent with an inflatable balloon isolates stapling sites to prevent migration and promote healing.

A single-piece stent combines radially flexible and stiffening sections to perform retraction and distraction functions in minimally invasive surgery.

A prosthetic heart valve delivery system uses a notched wire tether to attach and detach the stent frame for controlled positioning.

Segmenting the outer crimped textile from an inner impermeable polymer liner resolves the contradiction between mechanical strength and fluid impermeability.

A handle assembly with a deployment knob withdraws an outer sheath to release a self-expanding medical device, resolving placement precision challenges.

Ultrafine polyester fiber with controlled crystallinity generates thermal shrinkage stress to resolve stent graft integration and blood leakage issues.

A movable reinforcing spacer between delivery tubes prevents kinking by elastically deforming to maintain uniform support.

A D-shaped chimney graft conforms to the aortic wall to prevent leakage between devices, resolving sealing integrity issues in aneurysm treatment.