Stents TRIZ Cases

A gear mechanism transmits rotation to retract the tubular sheath, reducing frictional forces during vascular implant deployment.

A pusher guide wire uses a stent holding portion with varying frictional resistance to control stent movement during delivery.

A compression element limits balloon expansion inside a rigid device lumen, preventing cracking during minimally invasive deployment.

Segmented tubular rings linked by elastic bridges improve stent deliverability through torturous vessels while maintaining scaffolding strength.

A resilient pusher tube constrains an intrasaccular implant for precise microcatheter delivery.

A dual filter embolic protection system uses a flexible elongated member to conform to vascular arches while capturing debris.

A hybrid polymer stent integrates distinct polymer regions via 4-axis additive manufacturing to resolve radial strength versus vessel trauma trade-offs.

Movable flow control components in a hydraulic delivery system switch fluid pathways between deployment and recapture modes, reducing clinician burden.

Inverting a toroidal balloon minimizes ureteral friction and injury risk during stone removal.

Nested tapered wedge and ring components secure the distal sheath to the inner shaft, reducing bulk while maintaining connection reliability.

Composite nitinol-platinum stents eliminate electrolytic corrosion risks from heavy metal coatings, ensuring reliable below-the-knee revascularization.

A degradable anchoring layer secures a stent abluminal coating, preventing detachment and inflammation while promoting endothelialization.

Segmenting the support into discrete springs resolves the contradiction between axial rigidity and flexibility for navigating curved vessels.

A coaxial nanofibrous coating combines a degradable PLLA core with a hydrophilic PEGDMA sheath to create a bioinert surface.

Flexible low-profile stent grafts with centering baskets resolve delivery complexity in tortuous anatomy.

Dynamic conical mesh retention structure allows physicians to reposition and detach stents, resolving reliability versus adaptability contradictions.

A bioabsorbable stent aligns intestinal tissue while an adhesive bandage secures the connection, reducing surgical time and leak risks.

A compressible annular support frame enables longitudinal folding of a large-diameter transcatheter heart valve for catheter insertion.

Flared stent heads prevent separation between heterogeneous tissues while maintaining a large inner cavity diameter for surgical instrument passage.

Dual cannula stent delivery systems use trigger wires to prevent foreshortening and improve recapturability during deployment.

Antithrombogenic layer on interlaced yarns minimizes blood leakage while maintaining flexibility for small-diameter vessel implantation.

Flared end regions maintain blood flow while the intermediate region isolates therapy, preventing distal ischemia during continuous perfusion.

Laser spheroidality rounds helicoidal stent strand tips, eliminating sharp edges that damage blood vessels and catheters during implantation.

A drug delivery stent uses a control device to vary surface hydrophobicity and release medicinal substances on demand.

A torsional member radially compresses a stent graft to enable longitudinal and rotational adjustments during deployment.

Segmented carriage assembly and resheathing locks enable partial deployment of self-expanding heart valves for precise repositioning before final placement.

A segmented medical stent uses distinct cell patterns connected by links to balance radial support with delivery flexibility.

An endoluminal prosthesis employs asymmetric sinusoidal and M-shaped spring stents to resolve sealing efficacy issues in tortuous vascular geometries.

A medical balloon tip sleeve uses a lubricious outer polymer layer bonded to the catheter neck.

Segmented three-tube catheter controls stent expansion to resolve positioning errors during deployment.

A curvable stent-graft uses a tightenable loop to adjust its shape during deployment.

Inflated balloon catheter creates a contained space for viscous hydrogel placement, preventing washaway by blood or fluids.

Thermal contraction secures cut lymphatic vessel ends, preventing shrinkage and maintaining fluid flow.

Magnetic hematite nanoparticles enable remote shape memory actuation in 3D printed polymer stents, resolving neointimal hyperplasia and restenosis.

A medical device featuring a hydrophilic copolymer adhesive layer with sulfobetaine and photoreactive groups bonded to a substrate.