Cannulas TRIZ Cases

A lead-screw actuator advances and retracts the pericardial needle, improving placement control and limiting deeper heart tissue puncture.

Electrical cutting creates controlled access across luminal walls while limiting fluid leakage.

An integrated cannula assembly combines access instruments to support multilevel spinal decompression with less procedural complexity.

This surgical access sheath integrates LEDs for directed visibility, external wire routing, and reduced heat exposure near tissue.

A pinch-actuated depth limiter grips the cannula to allow adjustment while preventing trocar over-insertion in laparoscopic access.

A central valve and radially placed auxiliary valves rotate to improve robotic instrument positioning and surgical access.

Nested stent and capture structures restore blood flow while preventing clot fragmentation and vascular trauma.

A rotatable camera endoscope corrects image orientation to provide a variable field of view without flexible distal segments.

Spring loaded collar secures the top ring assembly to enable multi level vertebral access without removing the entire system.

An expandable conical soft tissue protector segments the surgical cavity, reducing nerve damage risk while enabling precise hardware positioning.

A scoring catheter with an expandable element dissects calcified heart valve leaflets to facilitate controlled dilation and subsequent device placement.

A tubular casing encloses an organ to prevent gravity-induced contamination during removal, while a comminuting device reduces volume for easier extraction.

A magnetic needle collects superparamagnetic particles bound to inflammatory mediators in the synovial cavity.

Side openings align with the needle to visualize blood flow, resolving vessel puncture indication while managing device complexity.

Remote actuation pivots the camera up to 90 degrees, resolving fixed-angle limitations in endoscopic imaging versatility.

Dynamic cannula transitions from low-profile insertion to expanded anchoring, resolving the trade-off between minimal incision size and easy device removal.

A sealed obturator prevents blood backflow while its MRI-detectable agent ensures accurate tip location during biopsy procedures.

Asymmetric cup geometry aligns cutting edge perpendicular to shaft centerline, preventing tissue damage from mis-oriented cuts.

A sheath guides a heat exchange unit into body cavities to adjust temperature rapidly while avoiding blood clotting risks from extracorporeal heating.

A flexible tissue isolator with multiple openings enables controlled morcellation and extraction during laparoscopic surgery.

A flexible patch seals the incision site to trap leaking insufflating gases, which a vacuum system draws through a filter to remove pathogens before discharge.

Segmented retractors and nested inserts enable radial instrument positioning, reducing abdominal wall trauma while maintaining reliable suction performance.

Deployable drains extend radially to provide simultaneous multi-location drainage and irrigation, reducing blockage risks from tissue ingrowth.

A movable handle and trigger assembly use a cam pin in an elongated slot to maintain consistent angle during actuation.

A surgical grasper pivots to form a cavity that shields a cutting member during navigation within patient tissue.

Two-step trocar insertion changes angle after penetration, a move that resolves easy entry versus weak fixation and stabilizes cavity brightness.

A laparoscopic instrument transmits wireless power to a capsule endoscope using dedicated antennas for efficient energy delivery.

A cannula assembly with deployment wings delivers cell-seeded matrices through small arthrotomies.

A surgical dilator advances through capsular tissue while an actuator retracts the guiding wire.

A medical instrument guide uses a quick-release lever to accommodate multiple needle diameters and angles.

Flexible tabs engage bottom body teeth to lock the rotating multiport end cap, maintaining gas seals during minimally invasive procedures.

Custom templates guide instruments through pre-planned paths, reducing radiation exposure from repeated real-time imaging.

Segmented protective shield slides into portal shaft to prevent nerve root injury during bone resection while maintaining clear optical visibility.

Integrated cover element retains locking nut to prevent loss during disassembly while maintaining ease of operation.

Rotating rollers and elastic sleeves reduce insertion force in hemostasis valves while maintaining fluid-tight seals.

Flexible fins retract to maintain a large working angle while minimizing tissue damage and cost.

Optically transparent evacuation port body enables visual inspection of internal lumens during surgical procedures.

A surgical jaw mechanism regulates closing force to weld tissue effectively, preventing trauma during vessel harvesting.

A movable endoscope camera shifts laterally within a tubular enclosure to optimize viewing angles.

A bladeless obturator features a helicoidal tip that rotates from base to vertex, enabling controlled tissue dilation during surgical insertion.

Segmented wound and internal retractors control abdominal structures through small incisions, resolving visibility constraints in laparoscopic surgery.

A bipolar cutter uses a ceramic tissue holding part with a groove structure to manage heat conduction during endoscopic procedures.