Stents TRIZ Cases

A double-tube stent uses a silicon coating on a shape-memory alloy body inside a fitted PTFE tube.

A mandrel with patterned grooves and a rotating collar guides wire to form stents automatically.

Independent proximal and distal sheath segments allow controlled longitudinal movement to resolve deployment accuracy trade-offs.

A bifurcated stent delivery catheter uses a longitudinal slit to release segmented arms, reducing thromboembolic complications during aneurysm treatment.

An extractor applies torsion to a plate section on a tubular retractor, enabling predictable plastic deformation for safe removal.

Gradual pitch angle transitions align helical stent ends orthogonally, eliminating dog bone expansion artifacts during crimping.

A photo-cross-linkable shape-memory polymer enables precise melting point adjustment via copolymerization.

Septum divides common iliac artery into separate lumens, enabling secure aneurysm exclusion in short arteries where conventional stents fail.

A porous balloon catheter dissolves its soluble polymer coating via solvent inflation to embed drug microspheres in the vessel wall, enabling sustained release.

An expandable chamber within a covered stent adjusts lumen size via a self-healing valve, balancing internal bleeding against blood toxicity.

A balloon catheter with a distal valve and helical member eliminates device exchanges by enabling sequential thrombus removal and dilation.

Inflatable balloon cooled by refrigerant delivers uniform cryogenic ablation to esophageal tissue.

One actuator manages unsheathing, expansion, and locking steps to reduce procedural time.

Adjustable limb extensions on a bifurcated graft enable off-the-shelf customization, reducing procedural time by eliminating custom fabrication needs.

A degradable metal stent provides mechanical support through controlled corrosion, reducing adverse biologic responses and restenosis risks.

Dual-axis mandrel rotation aligns fibers in rotational spun medical appliances, resolving trade-offs between precision and production complexity.

Multiple guidewires guide a stent-graft into precise alignment with branch vessels, preventing blood flow compromise during deployment.

Segmented tubular members and dynamic actuator access resolve complexity trade-offs, enabling precise multi-stage deployment of medical devices.

A dual-stent delivery system reduces procedure time and inventory costs by accommodating varying patient anatomy through a single introducer platform.

Segmenting the balloon and braid components resolves blood flow occlusion during valvuloplasty, enabling continuous perfusion and precise valve distension.

Independent self-expanding scaffolds and an unsupported intermediate portion reduce delivery profile to navigate curved vasculature without vessel trauma.

A diffusion bonding method joins shape memory alloy components using high temperature heat treatment to form a metallurgical bond.

Die drawing orients bioresorbable polymeric tubing to resolve contradictions between radial strength and degradation stability.

A thin-walled spheroid balloon resolves insertion difficulty and non-linear pressure issues in enteral feeding tube retention systems.

Segmented shaft sections pivot via nested linkages to maintain consistent fastener deployment distance during laparoscopic procedures.

A stent with wavy annular members and parallel straight-line portions expands radially to deploy in blood vessels.

A crimpable supramolecular polymer implant enables minimal invasive surgery through high porosity.

A prosthetic heart valve expandable frame uses a rhenium-containing metal alloy to reduce delivery system size and minimize recoil.

Selective masking plates guide additive manufacturing to form specific stent connectors, eliminating the need to remove unwanted structural supports.

A segmented medical delivery shaft uses an exoskeleton to resist compressive forces during minimally invasive procedures.

Coolant-infused balloon catheter reduces tissue necrosis and restenosis by maintaining inflation pressure during therapeutic cooling.

A stent delivery catheter uses a living hinge mechanism to translate outer sheath movement for precise initial deployment positioning.

An occlusion device applies pulsating pressure via an oscillating body to stimulate vascular endothelial growth factors.

In-situ forming polymer foam generates a gas-expanded structure with a solid outer skin that seals irregular aneurysm sacs and prevents endoleaks.

Pocket elements on a stent graft base body house meandering stents, replacing manual sewing with automated processes to cut production time and cost.

Differential surface roughness on the stent resolves the contradiction between balloon retention force and vessel trackability.

Balloon catheter dilates constricted sinus ostia to improve drainage reliability while avoiding patient pain and bleeding complications from invasive surgery.

Incremental stent deployment via a ratchet slide mechanism provides precise control and sensory feedback during vascular prosthesis placement.

Switching between manual and electric drive modes reduces physician fatigue while maintaining surgical accuracy during implant delivery.

Proximally-extending pieces anchor the stent-graft in the pulsatile ascending aorta, resolving stability challenges.

Positional indicators on the prosthesis ensure alignment with fenestrations, preventing leaks and maintaining blood flow in asymmetric vasculature.

Pivotable fenestrations on a stent graft rotate to seal dynamic aortic branches, resolving incomplete sealing risks in complex aneurysm repairs.

A non-modular branched endograft system expands within the aorta and renal arteries to secure blood flow through aligned branch ostia.

Tungsten addition to cobalt chromium alloy boosts radial strength while reducing device weight and recoil.

Helical reel varies groove diameter to overcome static friction with high torque then increases retraction speed while reducing motor power requirements.

A shape memory catheter uses electrical resistance monitoring to control heating during deployment.

A flareable positioning member locks the tip assembly, reducing handle complexity and preventing device snagging during withdrawal.

Braided Nitinol stent expands radially to divert emboli away from cerebral vessels during cardiovascular procedures.