Stents TRIZ Cases

A stent insertion system uses a deflecting gear to convert proximal tube retraction into distal pushing element advancement.

Standardized fenestration lengths derived from average aortic diameters replace custom manufacturing, reducing production time for off-the-shelf devices.

Segmented conduit and stented valve design prevents misshaping while enabling minimally invasive replacement.

Segmented stent graft design with tapered and flared interfaces accommodates shorter common iliac arteries while maintaining secure anchoring reliability.

A tubular medical treatment instrument indwelling device uses a front tip featuring an engaging portion hidden within the sheath.

Preformed grooves on a self-expanding tubular body engage native leaflets via a trapping member to prevent prosthesis dislodgement.

Crimping an arcuate radiopaque marker onto a spiral ribbon tubular portion creates a flush outer surface for medical device components.

A multilumen catheter uses inflatable balloons to press delivery shafts into vein walls, forming intimal flaps that create bicuspid venous valves.

A constraining cover imparts longitudinal lengthening force, allowing balloons to expand safely while maintaining a reduced delivery diameter.

Pre-formed sinusoidal waveforms in wound stents enable laser trimming that removes excess material while smoothing ends to prevent rough edges.

An intermediary copolymer bonds a polymeric drug reservoir to a metallic substrate, resolving poor adhesion that compromises endothelial cell growth.

A catheter with a collapsible outer member changes stiffness dynamically.

Local ring modifications and rivet-shaped markers retain radiopaque elements during crimping, preventing dislodgment in thin-walled bioresorbable scaffolds.

Rotating the threaded rod moves the deployment sheath along the inner member, maintaining guidewire position while reducing kinking at the handle.

A tubular prosthesis uses a pivotable fenestration to align with branch vessels and seal unused passageways.

Uniform expansion alters the polymer molecular array to increase radial force while reducing cracks caused by inadequate expansion control.

Elastomeric sheath maintains uniform circular cross-section during inflation, enabling compact deflation for easier advancement through narrow vasculature.

Orient molecular chains in bioresorbable stent struts to increase radial strength, reduce strut fracturing, and minimize restenosis risks.

A medical implant delivery system uses a compliant annular bushing to transition profiles and enable reliable device deployment.

A stent graft uses an ePTFE membrane with serpentine fibrils to enable radial expansion without material infolding.

Contiguous walls in this double-barreled stent graft prevent extraneous blood flow into the aneurysm, resolving alignment precision issues.

Integrating the endoscope inside the delivery catheter shaft reduces navigation complexity while maintaining visualization for precise stent placement.

Injectable polymer foams expand within aneurysms to anchor stent-grafts, preventing endoleaks where pre-formed materials fail to conform.

Angled retainer slots release self-expanding stents during deployment to prevent misalignment.

Magnetic guide wires through a fenestrated stent-graft simplify cannulation, reducing procedural time and eliminating the need for customized devices.

A spiral release wire retains a stent graft on a guide wire catheter, aligning fenestrations with branch vessels in curved anatomy.