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.