Stents TRIZ Cases

A catheter with a double helix deflectable tip navigates vascular occlusions.

A wire-driven endovascular shunt expands to restore blood flow through a vessel.

Exposing drug-coated balloons to solvent vapor alters coating morphology, reducing porosity and air-bubbles that impair drug delivery efficiency.

Piezoelectric coatings generate low-intensity electric fields to repel platelets and promote endothelial health on implantable medical devices.

Increasing end connector density while reducing intermediate connectors prevents premature deployment and flowering during expansion.

Thumbwheel mechanism converts rotation into linear force to rapidly deploy large venous stents, overcoming limited mechanical advantage in conventional systems.

Near-field electrospinning decouples fiber diameter from pore size, enabling larger pores for capillary ingrowth in small-diameter vascular grafts.

A radial expansion stent reduces the effective diameter of a patulous Eustachian tube to alleviate symptoms.

Self-expanding hoops in a hybrid vascular graft expand radially to secure placement, reducing risks from open thoracic surgery.

Helical strut bands interconnected by coils resolve the trade-off between radial strength and deployment flexibility in vascular applications.

Inverting the proximal end positions fenestrations on the outer curve, preventing buckling and ensuring lumen wall engagement.

Segmented funnel and dynamic collar resolve positioning errors when crimping prostheses onto enlarged catheter tips.

A biodegradable double-J stent degrades over time to maintain urinary drainage without requiring surgical removal.

Dual lead screws in the operating handle drive a slidable distal sheath, enabling controlled partial and full deployment of the prosthetic valve.

Segmented control handles allow independent outer sheath movement, preventing prosthetic implant displacement during balloon expansion.

Impedance sensors on an invasive probe characterize clot composition, guiding treatment decisions and reducing vessel injury.

Optical visualization instruments integrated into the inner tube resolve positioning accuracy versus visual certainty trade-offs.

A tapered anti-catch member prevents stent snagging during sheath withdrawal, reducing migration and embolism risks.

Fixation elements anchor an external pull wire to the catheter shaft, minimizing bowing and preventing proximal stent movement during deployment.

A scissor-linked support structure allows stent repositioning, preventing malpositioning complications during valve implantation.

Lateral cannulation pocket enables ipsilateral access for patients with short common iliac arteries, avoiding complex valved fenestrations.

A chest drainage system uses pressure sensors to detect fluid blockages and trigger automatic clearing mechanisms.

A delivery catheter holder transitions shape to maintain secure engagement with a collapsed prosthetic heart valve during minimally invasive implantation.

Independent deployment elements enable controlled radial expansion of cardiac valve prostheses, resolving misalignment risks during minimally invasive delivery.

Segmenting the wall into radial layers uses swelling hydrophilic coatings to seal gaps, resolving leakage risks without increasing instrument diameter.

Nested branch stent-grafts displace vessel ostia to increase overlap between main aortic modules, resolving sealing versus perfusion trade-offs.

Aligning radial windows in nested sheaths allows a snare to capture a filter from the inferior side, bypassing superior access constraints.

Polymer sheets cushion scaffold struts during crimping, preventing strut fracture and ensuring uniform expansion for reliable delivery.

Segmented clamp blocks and comb-shaped arms reduce device complexity, enabling easy cleaning and lowering manufacturing costs.

Microporous silk fibroin stent coatings prevent re-stenosis while eliminating delayed thrombus risks from bio-inert polymers.

An intraocular implant uses vascular endothelial growth factor to stimulate new blood vessel formation for fluid drainage.

Segmenting the release mechanism into proximal and distal wires mitigates premature detachment risks while maintaining precise device positioning.

Rotation of a secondary handle retracts a protective sheath and actuates trigger wires to deploy an endovascular stent graft.

Biodegradable microneedles anchor extracellular matrix constructs to host tissue, preventing vascular thrombosis caused by blood pooling.

Fluid-responsive hydrogel expands to seal endoluminal devices, preventing endoleaks and migration.

Iron manganese alloy wire with nitrogen or chromium additives prevents pitting corrosion to ensure controlled biodegradation without fracture.

Hourglass stent-graft lateral apertures accommodate axial misalignment without custom manufacturing.

A removable tab and internal fins constrain nose cone axial displacement to eliminate gaps that risk patient injury during delivery.

Inflated occlusion balloon within a carotid stent isolates the treatment site, preventing embolic debris from traveling downstream to cerebral vessels.

Interdigitating axial and lateral stent elements ensure precise alignment, preventing restenosis and plaque shifting at vessel bifurcations.

A prosthetic valve delivery sleeve uses a step balloon to provide a smooth transition for advancing the catheter through vasculature.

A stent graft fenestration uses a shaped protrusion to enable adjustable alignment with branch vessels.

Segmented pin elements lock projecting loops to prevent rotation and jamming during vessel introduction.

Intermediary barriers and preliminary protective layers preserve sterility during crimping, preventing contamination of minimally invasive medical implants.

A resiliently stretchable sealing member with texturized yarns cushions the prosthetic heart valve frame against native tissues.

Offset balloon catheters distribute drugs through multiple side holes to prevent vessel wall injury while maintaining therapeutic drug quantity.

A tubular stent with a frusto-conical structure and retrieval hole enables secure valve positioning.

Self-expanding stent applies compressive force to graft, eliminating tape delamination risks during heating.

Modified medical balloon surfaces enable compact folding profiles for easier vascular removal.