Stents TRIZ Cases

Inwardly bent stent cells reduce the collapsible valve profile, helping recapture and reposition a prosthetic mitral valve while protecting native leaflets.

Antegrade delivery through the cystic duct uses a deformable polymeric stent to improve retention, shorten placement, and support later removal.

Existing single-material stents struggle to combine structural support with auxetic behavior; PPR and NPR layers apply radial pressure for tissue integration.

Segmented inflow, valve, and outflow modules use flexible capsule bands to navigate tortuous vasculature and align for deployment.

Collapsible incline and vertical sections pack compactly, then lock with supports to keep the oral airway open during CPR.

Linear displacement sensors, load cells, and optical fibers track valve diameter and radial force during deployment without disturbing the crimp profile.

A flexible membrane encapsulates shape-memory foam to support rapid LAA occlusion while containing particulates during delivery.

Sealing flanges and lateral projections help secure a percutaneous shunt between the superior vena cava and main pulmonary artery, avoiding open surgery.

Preferential separation lets coating sections separate as the scaffold expands, while micro-patterns increase friction against stent migration.

A removable delivery endcap lets an introducer sheath advance stents through a biliary access device for precise duct placement.

A rotating cam wheel and Cartesian guides distribute force across multiple jaws, enabling manual compression of large prosthetic valves with minimal mechanical stress.

A coupled catheter and ureteral stent deliver together, then separate so the proximal section can be removed without a second procedure.

A compressed mesh expands beside cerebral thrombi to create a fluid path, restore blood flow quickly, and limit distal embolization.

Porous polymer layers imbibed with elastomer form a flexible cover that supports lower-pressure inflation and uniform implant deployment.

An inner component stays positioned during prosthetic implant delivery as translating shafts use elastic deformation for locking.

A non-linear double-leaf spring profile lowers delivery friction while sustaining radial force against aspiration vacuum pressures.

Non-circular, self-expanding airway stents conform to oval tracheobronchial anatomy, reducing oversizing, gaps, infection, tissue ingrowth, and fracture.

A shape-memory pyloric implant expands in the stomach and duodenum to anchor securely and slow gastric emptying.

Elastic backbones store systolic energy to assist diastolic relaxation, while localized reservoirs improve adhesion and limit drug diffusion.

Segmented inner and outer shafts help deliver implants of varying lengths while adapting to vessel anatomy and limiting mismatch risks.

An elastic outer layer and coextruded inner segments enable temporary expansion for prosthetic delivery while reducing vessel trauma and plaque dislodgment.

A transurethral graft carrier positions and fixes tissue at an incised urethral stricture site for 5–21 days during healing.

A delivery-sheathed anchor uses exterior and interior tines to secure a stent-graft through the vessel wall and limit migration.

A pivoting severing device lacerates heart valve leaflets before stent-frame expansion, reducing leaflet obstruction during replacement.

Radiopaque markers provide fluoroscopic reference points for aligning a prosthetic valve with native commissures during TAVR.

Lateral control directs the spindle during self-expanding valve deployment, reducing leaflet interference and enabling functional evaluation.

Severe plastic deformation creates ultrafine Mg-rich grains and fine boundary precipitates, helping stents expand without cracking.

Flexible longitudinal and lateral strips are sutured to tracheal or bronchial cartilage to limit collapse and maintain airway patency.

Disposable caps and film sheets isolate drug-coated stents during automated balloon-catheter crimping to prevent cross contamination.

Segmented stent regions combine flared or barbed anchoring ends with central sealing features to limit migration during minimally invasive valve replacement.

A gearbox transfers torque from one input shaft to multiple output shafts, synchronizing actuator rotation for precise prosthetic valve expansion and compression.

The segmented frame balances compact vascular delivery with implanted stability through pivoting struts and radial expansion.

A tubular beam block uses a reciprocating plunger and gas flow to eject molten buildup during stent cutting and reduce rejects.

Manual prosthetic-valve delivery can cause hand fatigue and positioning errors; an electric motor and lead screw provide controlled outer-tube motion.

An SMA wire coils around tissue while magnets provide compression, creating an anastomosis with drainage in one minimally invasive procedure.

Adding up to 0.15 wt.% yttrium redirects oxygen reactions in NiTi, reducing harmful inclusions and improving wire fatigue.

A magnetic tube tip attracts a ferromagnetic crossing-wire tip to align insertion and simplify coronary CTO lesion crossing.

Braided or twisted cords secure a prosthetic valve for controlled release while minimizing entanglement during catheter deployment.

A compressed delivery system deploys an arcuate eye stent that expands in Schlemm's canal to improve aqueous humor outflow.

A ratchet retracts commissure posts during implantation to limit suture looping and valve damage through minimally invasive access.

An endoscopic catheter deploys a self-expanding tubular barrier in the duodenum to reduce nutrient and fat absorption without surgery.

A graft-integrated fixation device secures catheters within the cardiovascular system, reducing migration caused by patient movement and mispositioning.

See how a covered waist and dense-mesh bare ends reduce airway irritation, secretion retention, and restenosis.

Mixed radiopaque, support, and DFT filaments form a stent braid that improves X-ray placement visibility while preserving mechanical properties.

Expandable arch structures anchor to the native aorta, stabilize the wall, and maintain blood flow through critical vessels during dissection treatment.

Sinusoidal radially expandable rings help the prosthetic valve deploy in enlarged outflow tracts without backfolding, buckling, kinking, or regurgitation.

Pressurized fluid drives a piston and pusher through a funnel to uniformly crimp prosthetic heart valves for controlled delivery-system loading.

Radial crimping and a supported loading tube align and compress a replacement heart valve implant for faster delivery-system loading.

A movable element macerates thrombi into smaller pieces while an expandable basket captures fragments for retrieval.

A separate introducer guides a functional unit through small, tortuous vessels, while tapered ends and anchors support navigation and access-site hemostasis.