Stents TRIZ Cases

A distal suture release mechanism keeps a replacement heart valve recapturable during deployment, improving placement control through tortuous anatomy.

A holder with retaining members and orientation cues aligns prosthetic heart valves for faster, more accurate crimping with fewer errors.

Oblique anti-migration supports and elastic loops anchor a self-expanding esophageal stent against peristaltic axial forces while preserving lumen diameter.

Using a porous membrane bag and tensioned extensions, this case shows embolic debris capture without a wire frame while maintaining blood perfusion.

Dual threaded irises compress and load a stent in fewer steps, reducing crimping complexity, cost, and handling effort.

A rotatable nosecone and bearing let the shaft turn while the handle stays steady, improving catheter alignment and distal tip bending.

Dual pinch engagement and separate linear and rotational drives give catheters and guide wires precise, responsive navigation control.

A ball-and-socket nosecone pivots through curved vasculature to cut axial force, lower friction, and reduce gap formation during valve delivery.

An expandable embolic filter and locking sheath stabilize cardiac valve delivery while protecting aortic arch branch vessels from debris.

A tapered balloon nosepiece helps a prosthetic heart valve delivery tool pass anatomical obstacles and deploy the implant precisely.

A multi-zone expandable anchor with atrial and ventricular skirts secures mitral valve implantation while limiting obstruction and dislodgment.

A steerable capsule and pull-wire delivery approach enables prosthetic heart valve repositioning, retrieval, and lower-trauma implantation.

Opposed steering sections create free space near a cardiovascular defect, helping deploy patches without straining the weakened vessel wall.

Rotatable plates with spaced projections engage the stent at multiple points to improve positioning accuracy and control expansion during delivery.

A two-stage outer sleeve deployment keeps the implant constrained until alignment is verified, improving placement in the prostatic urethra.

Independent or simultaneous leaflet anchors improve prosthetic valve sealing and reduce regurgitation through less invasive transvascular repair.

A nested catheter and slidable guidewire system enables single femoral access to exclude iliac aneurysms while preserving internal iliac blood flow.

Flexible multi-loop retaining ends keep a ureteral stent in place while reducing tissue contact, irritation, hemorrhage, and urinary urge.

A cinching mechanism compresses a side-delivered prosthetic heart valve for catheter delivery, then releases for large-annulus sealing.

A decellularized PGA scaffold with ECM coating improves graft patency while resisting dilatation, calcification, and immune response.

Exposed troughs at the greater curvature anchor the stent-graft, while covered lesser-curvature crests keep flow-aligned surfaces to lower thrombosis risk.

A stent-graft flow restrictor redirects aortic or venous blood to improve renal perfusion, enhance diuresis, and reduce fluid overload.

Adjustable anchor foot angles and contact area distribute load at the annulus to secure a prosthetic valve without puncturing heart tissue.

Color-matched knobs and indicators help verify shaft flex adjustment, improving prosthetic valve placement and reducing paravalvular leakage.

Funnel-shaped connectors let the stent hinge in multiple directions without kinking while preserving radial support, patency, and deployment accuracy.

Axial fingers shield prosthetic valve leaflets from metal struts during crimping, enabling uniform compression and reducing component damage.

Spiral tracks and stationary slits guide linear jaw motion to crimp prosthetic valves with lower force, lower stress, and sterile manual use.

Bent struts and staggered loop alignment let a helical stent crimp smaller with less strut interference while preserving radial support.

Recessed branch openings and guided deployment improve access to tortuous aortic arch vessels while simplifying branched stent graft placement.

A guarded penetrating catheter enables minimally invasive CSF shunt placement via the inferior petrosal sinus to reduce VPS complications.

Serpentine brace elements between adjacent stent rings add rigidity, reduce buckling, and improve placement accuracy in long stents.

Curved resection blades remove obstructive valve leaflets before valve-in-valve deployment, helping preserve coronary blood flow.

Axially moving stent spines expand to large vessel diameter while preserving blood flow, reducing ischemia risk during aortic treatment.

Interwoven wires of different diameters let the stent compress for femoral delivery, then provide strong aortic support with low fluid permeability.

A common laser wavelength and pressure-controlled sintering keep nickel-titanium composition uniform in additively manufactured medical devices.

A non-porous polyisobutylene matrix around electrospun fibers improves heart valve durability while avoiding lifelong anticoagulant therapy.

An ultra-thin PTFE liner with flat-wire coil, braid, and graded durometer jacket balances large lumen, lubricity, flexibility, and pushability.

Facing side branch portals simplify branch wire placement in aortic arch stent grafts, enabling less invasive access to branch vessels.

A blood-absorbing annular seal expands after implantation to stabilize an atrial heart valve, cut leakage, and avoid leaflet damage.

A balloon-mounted stent with protruding features improves vessel-wall drug delivery while reducing dosage and supporting precise unsheathing and expansion.

Polymer-coated stent pockets and partitions raise lumen-wall friction to resist migration while limiting tissue ingrowth and easing retrieval.

A foldable self-expanding frame and regurgitation drum let large tricuspid valves pass through standard catheters while controlling backflow.

Measures distal and proximal vascular pressure over a preferred guidewire, avoiding catheter blockage and repositioning errors in FFR.

A locking arm couples the handle to the introducer sheath to hold prosthetic valve position during capsule retraction and avoid readjustment.

Radiopaque markers and symmetrical crimping help place a transcatheter valve at the right annulus depth to avoid leakage and conduction issues.

Implanted circumferential electrodes map spontaneous atrial fibrillation signals in daily life to pinpoint arrhythmogenic foci before ablation.

An intravascular renal vein pump uses a protective cage and occlusion control to lower venous pressure, improve kidney perfusion, and limit backflow.

A compliant intraluminal chamber stores and releases pressure energy to lower pulse pressure, raise diastolic pressure, and improve coronary flow.

A bore restriction lets sheath material be pulled distally to expose the stent proximally, simplifying delivery and reducing dislodgement risk.

A control rod and ligature mechanism lets a stent graft be radially constricted, repositioned, and anchored more accurately during aneurysm repair.

Integrated guide member prevents guide tube detachment in branched stenosis areas.

A luminal stent features an anti-leakage structure dividing the tube body into sections with varying diameters to ensure uniform radial compression.

Offset connecting elements transition the stent from a straight to a helical shape, distributing compressive stress and minimizing thrombosis.

Phase-change materials absorb latent heat to regulate temperature around implanted elements, preventing tissue overheating during therapeutic heating.

An expandable mesh member exerts radial force to dislodge vessel obstructions and restore blood flow.

Separating drug eluting components from the implant body prevents loss during deployment, ensuring reliable therapeutic release.

A method calculates effective capacitance from an equivalent circuit model to identify cell types.

A magnesium alloy endoprosthesis utilizes yttrium and rare earths to enhance mechanical strength.

A tension management device prevents over-tensioning damage to stented prosthesis delivery components by using a biasing element and drive gear system.

A stent delivery system uses a rack member and rotary roller to move the restraining tube for precise placement.

A convertible nephroureteral catheter uses a detachable portion to transform into an internal stent.

Electrospinning encases a dissolvable template to create porous channels, overcoming diffusion limits in tissue engineering scaffolds.

A synthetic heart valve uses a low roughness surface to reduce blood component trapping.

A differential thickness sleeve inverts under pressure to block stomach acid while allowing food passage.

Accelerated corrosion of axial connectors enables sequential stent deconstruction, reducing mechanical stimulation and secondary hyperplasia.

An axial control body drives radial compression of a blood pump rotor and housing, reducing material strength demands during transport.

Axial spacing mechanism prevents axial compression of the prosthesis during loading and deployment.

Concentric gimbals and circumferential draw lines enable precise pitch and yaw control of a transcatheter valve during implantation.

Graduated diameter transitions and high tenacity warp yarns eliminate leakage voids during high-pressure bone filler injection.

Opposite pretwisting compensates for vessel curvature twisting, ensuring full expansion without kinking.

A flexible intravascular delivery device uses a pivoting locking unit to secure medical implants during precise positioning.

An inflatable balloon tip anchors a transseptal sheath in the left atrial appendage, preventing dislodgment during implantable device deployment.

Segmented biodegradable stent link sections adjust strength and flexibility across healing phases, resolving adaptability versus complexity trade-offs.

Electrolytically erodable latch releases self-expanding stents without direct attachment, eliminating joint corrosion and electrocoagulation damage.

An elastomeric cell-impermeable layer prevents occlusion from cellular migration while a porous PTFE layer supports endothelial growth.

Amide-containing plasticizers modify Nylon-12 to balance burst strength with flexibility, resolving trade-offs in angioplasty device performance.

A drive assembly couples a spiral spring with a brake mechanism to provide controlled retraction assistance, reducing clinician effort during device deployment.

An endovascular delivery system positions and expands an intraluminal implant to create a vascular connection.

A radially compressible prosthesis deploys flexible anchoring members to secure a blood vessel connection without manual stitching.

Helical drainage features on a pancreatic stent maintain main duct patency while allowing fluid flow from side branches.

Segmented helical rings with connecting bridges allow the stent to flex through tortuous vessels while maintaining structural support for patency.

A radially adjustable stent delivery tip changes diameter to maintain an atraumatic profile during insertion.

Helical threads on a drive tube convert rotary motion into longitudinal advancement, reducing tissue trauma during endoscope insertion.

Segmenting the transport tube resolves friction during automatic rotation, enabling smooth delivery of branched stent grafts.

A triple balloon catheter delivers polymer solution to form biodegradable arterial stents in situ.

A medical device handle uses a rotatable collar and slidable door to control catheter deployment.

Thin-walled customizable stents prevent pediatric airway collapse while maintaining lumen area, avoiding obstruction from thick conventional silicon devices.

Stereocomplex crystallites from melt processed PLLA and PDLA blends enhance fracture toughness and radial strength, preventing mechanical failure.

An asymmetrical braid pattern redirects blood flow away from aneurysms while maintaining perfusion to adjacent structures.

Torque device cuts the delivery sheath while clamping the wire to prevent implant shift in tortuous vasculature.

Nickel-titanium ternary alloys increase elastic modulus to improve torque transmission and bending resistance in medical devices.

A control handle uses a rotary part to wind a control wire, enabling adjustable bending speed.

A retractable outer sheath with a neckable element exposes a therapeutic coating upon expansion.

Segmented vane assemblies expand to isolate guidewires, preventing twisting and enabling precise stent graft deployment in vessel bifurcations.

A bowl-shaped mesh device with a central lumen expands within an aneurysm sac to guide embolic member insertion.

Segmented stents reduce fatigue failure in pulsating vessels by allowing independent segment movement to absorb cyclic stress.

A stent integrates a three-dimensional anti-migration structure to increase friction with the body lumen.

A stent marker element protrudes from the implant surface in a circular arc shape to enhance radiopacity.

Self-transitioning biasing members in a capture assembly resolve retention reliability versus device complexity trade-offs during valve deployment.

Heat treatment alters near-surface carbon content in iron implants to induce lattice strain.