Stents TRIZ Cases

A steerable overtube uses a shape locking mechanism to maintain distal configuration while accommodating oversized accessory channels.

A dual net vascular filtration device uses a hinged central frame to evert the distal filter into the proximal net.

Expandable tubular frame uses segmented stent members to provide bending flexibility and radial strength.

A stent-graft membrane mimics vascular elasticity to maintain physiological compliance.

Segmented lumens in a delivery catheter prevent guidewire tangling at branched sites, enabling precise device placement.

Fluid jet apparatus removes burrs and debris from stent lumens, preventing thrombus formation while preserving lattice integrity.

A delivery catheter features a deformable distal tip that expands radially to prevent edge formation during implant recapture.

Discrete attachment areas with flattened wall thickness enhance suture pull-through resistance while maintaining original flow area and packing volume.

A stent delivery device uses a pusher member and puller member to control inner and outer sheath movement.

Hinged stent struts protect neural interfaces from delivery stresses while ensuring stable biological contact.

Rounded termination bends and corner recesses lower opening pressure, enabling compact deployment without sacrificing structural stability.

Functional groups in block copolymers form covalent bonds with metallic stents, preventing detachment when styrene content increases.

Automated overmolding replaces manual glue application on polyimide tubes, reducing manufacturing complexity while maintaining attachment reliability.

High-speed camera monitoring detects initial fracture in vascular stents during fatigue testing, enabling accurate endurance limit prediction.

Volume conduction powers implantable sensor, eliminating bulky coils and batteries for continuous intravascular monitoring.

A stent delivery system uses a reinforced polymer shaft with a low friction lumen to resolve stent position stability issues during retraction.

A sleeve mediates between the outer shaft and elastomeric seal to minimize friction.

A cobalt-chrome alloy detachment element connects an endovascular implant to its insertion aid, enabling rapid electrolytic dissolution upon voltage application.

Inert layers in a biodegradable stent prevent uncontrolled degradation, sustaining radial force and axial strength.

Actively controllable stent grafts use motor-driven expandable collars to adjust diameter and anchor retention tines for precise positioning.

Cuff-based fixation anchors secure medical implants to biological tissue using a specialized engagement member.

Projections engage stent pores to reduce distortion and improve size compatibility.

Segmented balloon pillows with elastic constraining rings prevent longitudinal elongation, reducing vessel dissections during angioplasty.

A guiding catheter hub features an inner surface inclined portion matching the shaft angle to lower friction during instrument insertion.

Funnel-shaped storage containers preserve device hydration and prevent memory effects while enabling efficient loading into delivery sheaths.

Segmented bump members on a delivery wire minimize axial travel during stent deployment to prevent mispositioning.

A balloon catheter uses a distal control band to restrict overexpansion during stent deployment.

Coextrusion forms enclosed channels in ePTFE graft walls, preserving bioactivity during sintering.

Snap-fit guide cover and base constrain radial displacement and circumferential rotation, preventing stent twisting during compression.

An expandable member applies radial compression to crimp polymeric stents, reducing stress relaxation and preventing permanent deformation during shipping.

A diameter reducing arrangement constricts a tubular stent graft using a secured strand section, preventing the bird beak configuration in curved aortas.

Hollow stent struts store therapeutic substances within a metal framework, eliminating polymer coatings that cause adverse reactions.

Progressive knit row release reduces deployment force and prevents device displacement.

Semi-permeable encapsulation protects pancreatic islets from immune rejection while enabling glucose diffusion for continuous hormone regulation.

Roughened base stent surface enables covering material penetration to form positive fit, resolving flexibility and adhesion trade-offs.

A braided stent structure balances radial and axial forces through specific wire rod mesh configurations.

A stent uses transitional sections with varying strut lengths to maintain consistent scaffolding along its entire length.

Concave balloon ridges sandwiched between stent struts prevent detachment while maintaining a compact distal profile.

Segmented housing zones and intermediary elements prevent conduit kinking during balloon inflation, ensuring consistent fluid flow.

A balloon catheter obtains pressure measurements for vessel visualization.

A melt bond fuses the inner compression member and guide channel member, maintaining friction fit under torque-load during stent deployment.

A coaxial intravascular delivery system featuring a tapered micro-catheter with an integrated pre-dilatation balloon.

A segmented intraluminal delivery device uses radiopaque markers to align and deploy multiple tacks sequentially.

Nested braids with variable porosity seal aneurysm necks while preserving perforator vessel blood flow.

Blending polylactic acid with magnesium particles reinforces the polymer matrix, resolving mechanical strength deficits while maintaining radiopacity.

Magnetic elements replace mechanical springs with repulsive forces, reducing foreign material volume and restenosis risk in delicate vessels.

An expandable stent deployed in the right ventricular outflow tract reshapes the tricuspid valve annulus to improve leaflet coaptation.

An enlarging member treats the catheter by expanding its lumen, preventing kinks and ovalization in tortuous neurovasculature pathways.