Excision Instruments TRIZ Cases

A conductive hook discharges electrical energy to sever polyps from the inner lining of an internal cavity.

A plaque scraping stent adjusts its outer diameter via a push catheter to scrape subintimal plaques without damaging normal vascular intima.

A medical device rotation structure features a cutting portion with an expanding notch width to drive efficient stenotic object removal.

Selective wire tensioning in a flexible elongate member exposes cutting segments for multidirectional incisions, reducing procedure time and tissue distress.

Variable-length second region controls loop shrinkage, resolving the trade-off between small polyp capture completeness and operation resistance.

Eccentric abrasive element ablates plaques while pressurized fluid entrains debris, eliminating retrograde flow discrepancies.

Snare member with varying cross-sectional area reduces stiffness and deflection away from tissue plane during resection.

A sphincterotome stiffening member reduces kinking and whipping of the cutting wire to maintain precise angular positioning during activation.

Segmented wire members nest for delivery then expand to remove obstructions, reducing failure risk in cerebral vessels.

A safety thrombectomy device uses a saline injection system to purge air from hollow tubes before vessel insertion.

Integrated suction and rotation mechanisms in a catheter dislodge and remove thrombi, preventing distal emboli during interventional procedures.

A colonoscope integrates a snare loop with a sliding cutting means to mechanically scrape polyps from the intestinal wall.

Pre-bent outer tubular member prevents vessel wall perforation during grinding, reducing debris size and eliminating distal embolization risk.

An anchored vascular filter captures emboli and breaks them down via mechanical agitation, preventing clogging and reducing stroke risk.

A crank mechanism with pivotally connected arms adjusts drive force based on travel distance in an electrically powered surgical stapler.

A rotatable tip atherectomy device uses high-speed mechanical abrasion to cut and remove plaque from vessel walls.

An expandable balloon with an abrasive surface selectively removes mucus-producing cells from airway walls.

Axial and radial grooves on an eccentric abrading head break hydraulic wedges, enabling effective removal of non-calcified plaque.

Dynamic pressing members adjust position along a snare wire axis to reposition tissue without removing clips, eliminating time-consuming re-clipping.

A nibless surgical snare loop retracts against a distal reaction surface to mechanically excise tissue without thermal damage.

A Nitinol retrieval device expands into a tapered cone to capture blood clots and rewraps for withdrawal.

Telescoping catheters with articulable beaks perform rotational dissection to clear chronic total vessel occlusions.

An annular ring with helically oriented tines embeds into vessel walls to secure graft connections without manual suturing.

A surgical instrument uses expandable legs with blades to cut tissue through radial and rotational paths.

Segmented actuating members rotate loop portions to increase grasping volume, reducing treatment time during endoscopic necrosectomy.

A mounting element slides along the concentric cylinder shaft to position an effector component, resolving obstructed access during intravascular procedures.

Segmented probes with invertible filaments remove spinal tissue precisely while preventing healthy tissue damage during minimally invasive procedures.

Segmented blades on a flexible body decompress stenotic spinal tissue through percutaneous access, reducing neural impingement and avoiding fusion.

Stationary bipolar electrode assembly vaporizes tissue using Joule heating, eliminating complex mechanical drive arrangements.

Expandable engager compresses clot for retrieval, reducing vessel trauma and fragmentation risks.

Mechanical mucosal resection avoids surgical invasiveness while improving glycemic control in metabolic disease treatment.

A medical device uses alternating cutting and non-cutting portions on a rotating structure to ablate stenosed sites within biological lumens.

An integrated catheter system cuts and transports occlusive debris while a filter traps aggregates, preventing distal embolization during removal.

Dual-basket rotational atherectomy devices use Nitinol to adjust cutting diameter, reducing catheter whipping and vascular injury during plaque removal.

Inclined cutting blades crush large thrombi into fragments, enabling removal through thin sheaths without surgical incisions.

Porous filter structure diverts emboli while maintaining blood flow, preventing vessel occlusion and cerebrovascular accidents.

A balloon catheter transmits mechanical vibrations through an internal wire to score plaque, reducing inflation pressure and preventing balloon burst.

Eccentric abrading head opens stenotic lesions larger than its nominal size by following a pilot hole created by a distal piloting tip bushing.

Lever arms expand impactor arms to fracture calcifications, resolving the trade-off between delivery profile and fracture effectiveness.

Segmenting thrombus with a rotating impeller prevents catheter clogging and reduces blood loss during removal.

Sliding sheath actuates dual-size loop petals to retain small stones while releasing large ones, reducing patient injury risk.

Phase-differenced wire pairs create variable spaces that capture obstructions while navigating complex vessel geometries.

Vibrational disturbers on a single probe increase mechanical stress to improve thrombus removal efficacy in small work channels.

Segmented braided wires in a torque cable enable precise rotational control for clot maceration without excessive device complexity.

Variable height staple drivers resolve the complexity of using multiple staple sizes while maintaining hemostatic and cinching effects.

A multi-phase intravascular device integrates filtering, atherectomy, and aspiration functions into a single hypodermic tube structure.

Segmented thrombectomy meshes use varying braiding angles to generate targeted radial forces, preventing thrombus fragmentation during extraction.

A tissue-removing catheter head expands its cross-sectional dimension via an elastically deformable member to increase contact area.

Internal cutting elements within a flexible sheath remove fibrin strands while protecting vessel walls from injury.

A fistulectomy instrument transmits rotational, vibrational, and reciprocating movements to a flexible cutting shaft for precise tissue excision.