Stents TRIZ Cases

An asymmetric retraction member with extending portions secures stent anchors, resolving the trade-off between compression and repositioning capability.

A perfusion catheter system uses a flow regulator to deliver oxygenated blood from an arterial source into the venous system.

Segmented drivers with sliding sheaths position primary and secondary implants at vascular bifurcations, reducing device bulk and improving maneuverability.

Monolithic connectors allow dilation elements to fracture hardened plaque while maintaining structural integrity through stress-induced plastic deformation.

Segmented profiles match angled implant interiors to prevent over or under expansion during minimally invasive deployment.

A degradable barb guard prevents frictional interference with deployment sheaths by covering barbs until vessel placement exposes the distal tips.

Sliding and bonding nested porous tubes creates complex tubular medical implants, avoiding permanent pore deformation from stretching.

Segmenting connectors with nested flexible portions minimizes the crimped profile while maintaining structural integrity and flexibility.

Fixed cross-linking points in a braided stent reduce axial shortening during deployment, enabling accurate positioning in tortuous vessels.

A flow adjuster panel divides a vessel lumen into unequal cross sections to create a pressure differential that alters blood flow dynamics.

An implantable sensor uses a circumferential electrode array to measure electrical impedance and capacitance across the vessel wall.

Radio-opaque markers on the distal graft end enable precise X-ray visualization, resolving identification risks in two-stage elephant trunk repairs.

Chamfered stent end adapts to bifurcation geometry, preventing lumen projection that causes deposits and clogging.

Expandable catheter sleeve protects bioactive coating during insertion, preventing premature loss while ensuring controlled release at the target site.

An integrated venting catheter delivers a retractable pacing wire to the right ventricle, eliminating complex catheter exchanges during cardiac surgery.

Parametric stent designs match patient arterial geometry via 3D modeling to prevent malapposition and strut breakage during expansion.

An artificial blood vessel features an inserting port with a check valve for intravascular device access.

Expandable braided intravascular device adapts to vessel anatomy, reducing coil herniation risk during wide-necked aneurysm treatment.

Interlocking wavy annular members maintain expanded state retention force while preventing flare-out in blood vessels.

A connector assembly merges separate catheters to synchronize retention sheath movement, preventing misalignment during bifurcation stent deployment.

Crosslinked biodegradable polymers balance radial force and elasticity to prevent incomplete apposition during vascular healing.

Segmented catheter legs form open slots that enable complete bladder drainage while preventing cuffing during removal.

A composite catheter uses local quality differentiation with harder shaft materials and softer tips to minimize vessel wall trauma during navigation.

A ureteral stent uses a coiled wire central portion and an elongate gap to allow fluid communication through the device lumen.

A molybdenum-rich base region bonded to a titanium surface via an inter-diffusion zone creates a composite medical device structure.

Nitriding forms a gradient hardness profile that impedes crack propagation, enabling thin-walled stents with improved flexibility and corrosion resistance.

Alternating flexible and rigid stent segments balance navigability through tight curves with structural integrity for aneurysm support.

Segmenting sensor arrays through row-column decoding reduces structural complexity while enabling precise, non-invasive monitoring of implanted devices.

Helical wire reinforcement on the catheter shaft resists compressive stresses, preventing buckling when deploying lengthy covered stents through narrow lumens.

Preloaded anchors and a hydrogel spacer enable precise rotator cuff repair without manual suturing.

Biodegradable flexible couplings allow radial compression, reducing long-term unnatural forces on the vessel wall.

Independent balloon inflation enables trumpet-like expansion to adapt stents in branching vessels without complex multi-device manipulation.

Varying braid properties create distinct tension elements that resolve the contradiction between wall strength and folding predictability.

A self-expandable intravascular implant uses inner and outer rings linked by bridges to maintain consistent radial force across varying vessel diameters.

Circumferential retrieval levers distribute compression to resolve non-uniform stent contraction and reduce user technique sensitivity.

A tapered oval dilator tip self-orients within tortuous vessels to resolve trackability constraints.

A spring mechanism automatically retracts the sheath after manual stent positioning.

Helical molecular orientation in bioabsorbable polymeric filaments resolves the mechanical strength versus bioabsorbability contradiction.

Nested cannulas with segmented needles deliver multiple agents to varying tissue depths, eliminating sequential insertion of separate components.

Thinner contact membranes retain thermal energy while thicker non-contact zones prevent leakage, enabling selective target site ablation.

Segmented delivery catheters deploy branched stent grafts through a single access site, reducing surgical trauma and procedural complexity.

Composite stent grafts assemble in situ to enable implantation in smaller vessels with minimal tissue trauma.

External magnets move internal masses to dislodge biofilm and sludge, preventing biliary occlusion.

A biodegradable stent features an electrospun fibrous covering to stabilize the device during vascular deployment.

A radially self-expanding endograft prosthesis creates a percutaneous shunt between the superior vena cava and pulmonary artery.