Stents TRIZ Cases

Segmented ureteral stents with shape memory anchoring prevent migration while porous coils ensure drainage despite encrustation.

Helical grooves disappear upon inflation to resolve the trade-off between small profile and structural integrity.

Flared end loops with secondary bends prevent fish-mouthing by guiding loop ends outward during catheter compression.

An expandable hydrogel coating on sutures fills suture holes in endovascular stent grafts, reducing or eliminating endoleaks.

Ejecting pressurized gas against the expandable member surface maintains a fixed applicator distance, ensuring uniform drug delivery on non-uniform balloons.

Segmented radial support structures in dual-tube lumen stents conform to irregular walls, preventing type-I endoleaks by sealing gaps.

Textured balloon walls reduce retraction force by lowering surface roughness in the inflated state.

Spring tongues clamp the membrane between stent webs, eliminating tissue irritation from exposed hooks.

A deflection catheter uses a slit rapid exchange segment to guide guidewires through tortuous vessels.

Pressure-actuated balloon valve prevents backflow during intravesical instillation, reducing systemic side effects from oral antimuscarinic agents.

Tapered struts distribute stress uniformly to improve radial strength, preventing collapse while maintaining vessel patency.

Transcatheter deployment of a segmented wire clip reduces mitral regurgitation without open surgery.

Flexible tubular valve body collapses to prevent retrograde blood flow, reducing thrombosis risk and surgical invasiveness.

Axial translation of the second pivot node relative to the link minimizes scissor-action damage to valve skirt, leaflets, and sutures.

Dual pressure chambers enable re-sheathing of partially deployed stents, correcting dislocation without displacing the device forward.

Puzzle-piece segments allow in-situ length adjustment, eliminating sharp edges and tissue trauma while maintaining structural stability.

Calender treatment of ultrafine fiber woven fabric reduces pore size to enable small-diameter catheter insertion without hydrophilic coating thickness.

Nested inner and outer sheaths resolve the trade-off between high invasiveness and difficult navigation through complex vascular anatomy.

Actuator travels tensioning unit along traveler strap to deploy mitral valve, reducing open-heart surgery morbidity.

Implanted compressible device reduces arterial stiffness by absorbing pulsatile pressure energy, minimizing right heart afterload.

A deformer transitions configurations to expand suction area on an aspiration catheter.

A sheath assembly uses a multi-layer structure with elastic expansion pieces to improve axial support and bending compliance.

Dual-layer magnesium fluoride and diamond-like carbon coatings on magnesium alloy stents prevent premature corrosion while maintaining mechanical strength.

A transcatheter valve prosthesis uses projections and an outer member to engage native tissue for secure fixation.

Segmented metal rings secure polymeric grafts to stents, enabling compression to a 9-15 French profile for delivery.

Integrated multi-zone catheter design resolves handling complexity by enabling precise, single-operator device placement.

A double helical stent design collapses and expands uniformly using rotational forces applied to its wire and suture structure.

Induction responsive muscles on the stent framework enable post-deployment repositioning by contracting under electromagnetic heating.

Electrostatic primer anchors drugs inside struts, preventing coating delamination during expansion.

A cauterization catheter uses a biasing member to move the tip between inactive and active positions.

Radial expansion and axial elongation of PLLA tubes modify crystalline morphology, resolving brittle failure and recoil issues in bioabsorbable stents.

Shape-memory alloy fingers in the retaining cage collapse the valve to enable repositioning without full expansion trauma.

Rounded strut corners distribute chronic palpatory forces across the implant frame, reducing stress concentrations that cause failure during heart palpitation.

Strut elements in a curved introducer assembly pull and push the proximal end of a stent-graft to ensure correct positioning during deployment.

Helical stent uses bioresorbable connectors that alter spring constant to prevent annular ring migration during vessel healing.

Twisted stent uses laser energy to trigger shape memory expansion, eliminating balloon catheters and reducing procedural complexity.

Dynamic constriction and electrical stimulation of the vas deferens wall resolve the contradiction between reliable sterility and permanent tissue damage.

Multi-component endograft with independently adjustable branch segments maintains blood flow to critical vessels during aneurysm treatment.

Auxiliary guide wire snared from side branch artery secures stent graft placement in thoracic arch without vessel wall damage.

A conical carrier element unwinds filamentary material along its axis without rotating parts to enable rapid dispensation into patient vessels.

Guide catheter separates grip piece expulsion from stent placement, eliminating endoscope retraction and papilla visibility loss during duodenal deployment.

Anti-migration barbs on a biodegradable stent prevent migration during controlled degradation, eliminating frequent replacements.

A pivoting ring seal tightens around an inflatable member as internal pressure increases, securing a reliable interface.

An implantable device constricts the pulmonary artery to increase right ventricular pressure and reposition the interventricular septum.

A stent design uses a ratchet mechanism to adjust strut length and generate radial force.

Twisted mesh tube segments slide along a cover via a restricting member, resolving the trade-off between bending flexibility and cylindrical shape stability.

Anchor clip grasping portions insert into stent holes, preventing dislocation in hollow organs.

Self-expanding stent with dissolvable sleeves enables rapid vascular deployment and secure wall engagement.

A spring-loaded actuation system retracts a pull wire to deploy intraluminal implants with controlled force.