Stents TRIZ Cases

Stent-conveyance tube advances a biliary stent along a guidewire using a breachable retaining segment.

Displaceable catheter lumens mechanically break down obstructive fibrous sheaths, restoring blood flow and avoiding costly exchange procedures.

A spiral cut on the outer surface of a transitional portion enhances flexibility in expandable medical devices.

A resin stent joins elastic members via a treated layer, preventing deformation during welding and securing the device in the bile duct.

Inflow prevention surface with radial gaps blocks food residue entry while maintaining bile drainage efficiency.

Mirror-image double bends in a continuous zig-zag spiral increase strut density to boost radially outward stenting force without compromising flexibility.

Telescoping arms nest standard modules to match vessel dimensions, reducing custom manufacturing complexity.

A stent delivery balloon applies a thiol group layer to prevent stent drop-off and shifting while protecting the balloon from cracking.

Tapered scoring elements reduce stiffness at cone portions to prevent vessel wall snagging during introduction.

Eased corner features on polymer stent rings reduce profile and prevent catching on calcium deposits while maintaining radial strength.

Superelastic magnetic frames join small hollow bodies to prevent leakage while avoiding vessel wall damage during the procedure.

Peaked wire segments in the expandable frame enable controlled diameter changes, reducing vascular trauma during device insertion.

A bioabsorbable vascular device disperses a buffering agent to neutralize acidic byproducts during polymer hydrolysis, maintaining tissue pH between 5 and 7.4.

Segmented bridges connect helical sections, allowing independent movement that reduces distortion during expansion in tortuous vessels.

Elastically deformable sections constrain the stent distal end to prevent radial flaring during catheter advancement.

A steerable catheter uses a coaxial pull tube and wire to bend distinct regions of the tubular sheath.

Segmented outer sheaths and independent suture strands reduce tangling while enabling precise valve expansion during transcatheter implantation.

Preformed groove traps leaflets while barbs anchor the prosthesis, resolving fixation reliability issues without increasing implantation complexity.

Heating polymer scaffolds below glass transition temperature improves balloon retention during crimping.

Temporary tie down wires constrain helical side arms to prevent distortion, ensuring accurate radiographic visualization of branch vessel alignment.

Actuator provides variable mechanical advantage to retract outer tubes, resolving the contradiction between device complexity and placement precision.

3D-printed biomimetic stents conform to tapered coronary arteries, reducing thrombosis risk from diameter mismatch.

Projections on the delivery catheter provide tactile feedback for precise prosthetic heart valve positioning.

A compartmental balloon catheter uses elastic constraining structures to modulate inflation and distribute force evenly across the treatment site.

Segmented underlap and overlap portions form a vent lumen that opens to maintain intercostal artery perfusion, preventing spinal cord ischemia.

Segmenting the device into an expandable body and a retractable leaf reduces distal embolization risk while ensuring reliable aneurysm occlusion.

Segmenting the stent support from the inner sleeve allows independent movement, reducing shortening and enabling repositioning in cerebral arteries.

Segmented constraining sheaths enable controlled deployment of a self-expanding stent-graft, reducing blood loss during emergency vessel repair.

Expandable distal part anchors a delivery device at a cardiac septal defect site.

Pre-shaped gripping arms on a leaflet fixing clip improve stability while reducing manufacturing complexity.

A covered stent incorporates an offset drainage region with multiple holes to facilitate fluid exchange between a bifurcated lumen branch and the stent interior.

A nested sleeve prosthesis directs bile flow through a dedicated lumen, preventing peritoneal leakage during biliary decompression.

Mechanical interlocks prevent premature expansion by constraining relative axial movement until full sheath retraction enables controlled deployment.

Epicardial stents enable multisite pacing and defibrillation, eliminating vascular complications from traditional transvenous leads.

A diameter reduction arrangement constricts a stent graft via a strand section, preventing malposition in curved aortas by enabling dynamic shape adaptation.

Electrodepositing chitosan from an acidic mixture onto hollow medical product walls prevents coating fractures during shape changes and reduces occlusion risks.

Protrusions on a hub engage the stent to prevent spontaneous expansion during outer sheath withdrawal, ensuring precise placement.

A threaded nut configuration on the delivery wire adjusts tension via a movable stop, resolving precision trade-offs during stent deployment.

A branch stent featuring a parachute element deploys through oversized fenestrations in a main vessel graft to treat complex bifurcation aneurysms.

A urethane polymer coating with low glass transition temperature resists blood component adsorption on medical devices.

Hollow spikes on an inflatable balloon penetrate arterial plaque to retain fresh stem cells, preventing washout by blood flow during vascular intervention.

Rotating coils penetrate tissue to fixate the graft, preventing migration and leakage without blocking side branches.

Electrostatic deposition of dry pharmaceutical powders onto stent substrates creates conformal, defect-free layers for biomedical implants.

An adjustable interatrial shunt uses a flexible mesh body and asymmetric flow control element to vent blood from the left atrium.

A catheter reinforcing member uses discrete structural regions with varying wall perforation patterns to establish distinct stiffness levels along its length.

A tapered cover and deconstructable constraining member secure an implantable device within a nested delivery system.

A stent integrates a single radiopaque component with a protruding part to enhance visibility.

Mechanical cutting removes plaque without barotrauma, preventing restenosis and enabling stent durability in peripheral vasculature.

Segmented balloon reshapes calcified bicuspid leaflets, creating compliant space for TAVR release and reducing perivalvular leakage.

Segmented serpentines with optimized bridge patterns increase middle portion radial strength while minimizing metal-to-artery ratios at vessel ends.