Excision Instruments TRIZ Cases

A discectomy instrument uses a rotary scraper to remove spinal disc nucleus portions through mechanical torque transmission.

A rotary cutter assembly uses a deflecting member to navigate tortuous anatomy and remove occlusive material.

A self-expanding coring portion cores vascular thrombus while a braided net captures the separated clot material for removal.

Electrodes create plasma arcs that produce shockwaves to crack calcified lesions, preventing vessel trauma from high-pressure expansion.

Nested guide wires and inner tubes enable independent steering of the device, adapting the basket diameter to varying vein sizes for safe valve removal.

A linear trigger handle assembly translates parallel to the central axis to distribute force, reducing user fatigue during prolonged hysteroscopic procedures.

A rotational driver modulates drive shaft speed and direction to reduce friction during atherectomy procedures.

Segmented scoring cage fractures stenotic deposits symmetrically while enabling rapid balloon deflation to minimize treatment time.

Variable pitch helical channels adjust inner member speed to optimize tissue cutting and debris removal efficiency.

A rotating screw mechanism conveys thrombi proximally through a catheter lumen, preventing maceration and fragmentation during retrieval.

Tube and wire loops form an aperture to dissect plaque, preventing embolization risks from residual material.

Bearings along a flexible inner shaft reduce actuator load and vibration by minimizing friction between the inner and outer tubes.

Integrated aspiration system removes small particles during atherectomy to prevent restenosis and intimal hyperplasia from residual debris.

Retractable cutting elements lacerate obstructive leaflets while an expandable basket captures debris, preventing coronary blockage during repeat interventions.

Tilting the snare wire loop transverse to the sheath axis enables effective lesion excision when the tool is angled near a right angle.

An inner heat shield prevents hot saline from burning non-target tissue during combined shaver and RF procedures.

Segmented atherectomy device resolves sheath size versus trauma trade-off by routing debris proximally through integrated suction.

An aspiration catheter reaches the concave portion of a deformable basket filter to remove collected debris, preventing scattering during vascular treatment.

Nested coil fasteners expand to secure tissues through necrosis, preventing leakage in minimally invasive anastomosis.

Segmented cutting teeth distribute forces to remove plaque while preventing vessel rupture caused by concentrated cutting pressure.

Dual expanding members and a flexible cover secure the device against vessel walls, enabling effective thrombus removal despite strong blood flow.

An ultrasonic surgical device excises knee ligaments and bone footprints through high-frequency vibration.

Segmented collar replaces magneforming machinery, reducing manufacturing complexity while maintaining connection strength.

An electrically non-conductive shrinkable pouch collapses around a polyp to prevent uncontrolled electrical arcing and tissue burns during endoscopic resection.

Opposing cutter rotation neutralizes particle swirl to prevent downstream embolization and arterial wall damage during plaque removal.

A medical device drive shaft uses a deformable distal coil to absorb load torque while rotating.

A retractable wire loop apparatus fragments blood clots through controlled mechanical retraction.

Dual drive shaft atherectomy device uses eccentric weight rotation to generate centrifugal forces that radially deform the cutting member.

A vertical cutter uses a deflecting blade to prepare spinal disc spaces.

Secondary struts shift from aligned to non-aligned positions to reduce pore size and prevent vascular obstruction detachment during withdrawal.

A medical device uses a dual-motor system to rotate the drive shaft and fluid path, enabling continuous aspiration of calcareous fragments.

Segmented loop wires adapt to varying tissue sizes while minimizing damage to surrounding blood vessels and tissues.

A medical device distal end tube uses a resin covering material to reduce friction with blood vessel walls.

A button-operated handle uses a slidable core and collet to secure elongate medical instruments.

A one-piece tissue-removing element combines cutting teeth and inner shearing members to rotate within a blood vessel lumen.

Segmenting the shaft into inner and outer walls with an insulating air gap blocks heat conduction, preventing collateral tissue damage during morcellation.

A rotational atherectomy device uses helical welds to secure the cutting member, reducing stress concentration at attachment points.

Radially offset impeller mass creates orbiting motion that enlarges working diameter, reducing aspiration pressure and blood loss during thrombus removal.

A gearless motor assembly rotates a cannulated drive shaft via electromagnetic induction without mechanical gears.

A collapsible tissue extraction bag expands inside the body to contain specimens during morcellation.

A self-expanding scaffold scoring assembly integrates cutting edges with a deployment member to mechanically score stenotic plaque.

An inflatable bone tamp expands collapsed vertebrae to allow an ultrasonic cutting tool to remove disc material without clogging.

A thrombus extraction device uses a crushing suction head and inflatable balloon to navigate small vessels.

Motorized actuator replaces manual cable manipulation to position the snare loop precisely while a multi-mode foot pedal consolidates electrosurgical control.

Geared coaxial tubes enable precise tissue cutting and containment, reducing tumor spillage risk during minimally invasive specimen retrieval.

An everting member on a cannula grips a guidewire to advance it through obstructions, preventing vessel wall damage.

Rotating cutting wires in the cage harvest bone slurry for fusion while avoiding end plate damage through needle biopsy extraction.

Retractable vibration wires enable plaque removal with reduced artery wall trauma compared to conventional cutting elements.

A straight surgical instrument uses circumferential rasp teeth to loosen infectious material from fistula passages.