Cannulas TRIZ Cases

Laser cutting creates fracture elements in cylindrical walls to minimize tangential and radial play, improving distal tip payload capacity and repeatability.

A longitudinal member guide uses channels and slots to maintain steering wires in a fixed radial position.

A surgical instrument positioning device uses a polyaxial shuttle and locking mechanism to hold instruments in fixed positions.

Lockable adjustable coupling maintains precise tool positioning despite length variations.

Disposable barrier shroud containing fluid and tissue debris prevents contamination while reducing sterilization time.

A stepper motor actuates the needle displacement mechanism to deliver nutrients into amniotic fluid while preventing embryo puncture.

A retractor cannula device integrates an endoscope to provide direct visualization during minimally invasive spine procedures.

Segmented funnel guard prevents instrument damage while maintaining thin cannula profile.

Transparent trocar tips enable visualization while tissue penetration occurs, resolving the conflict between safety and visual feedback.

Rotating sealing ports eliminate the chopstick effect by allowing multi-angle instrument insertion while maintaining abdominal insufflation.

Polarization-sensitive optical coherence tomography generates real-time spatial maps of anisotropic tissue structures during surgery.

Sliding tabs and annular frames constrain proximal working channel motion, resolving stability versus angle adjustment trade-offs in spinal surgery.

Resilient fingers engage annular holes in a two-section body to incrementally adjust height, accommodating varied access device sizes during specimen removal.

Flexible fins with shape memory alloy adjust bias pressure to resolve cannula length versus working angle contradictions.

A posterior-to-lateral surgical approach guides instruments through muscle tissue to access the disc space.

An annular channel neck induces the Venturi Effect to evacuate surgical gases, resolving smoke accumulation during large specimen removal.

A surgical guide assembly uses a rotatable strap and clip to secure instruments via a circumferential groove on the device knob.

A cannula employs moveable tool fingers that splay outwardly to increase internal cross-sectional area for multiple surgical instruments.

Automated inline spray nozzles use PWM to cycle rapidly, maintaining constant droplet size despite varying conveyor speeds.

A coaxial surgical assembly integrates a 2 mm hollow needle with an internal instrument featuring biased end effectors and a dual fixing system for secure anchoring.

Telescopic tube sections extend to expose the distal end for cleaning, eliminating repeated docking procedures.

A medical manipulator system detects arm interference with an insertion aid device to regulate retraction movement via a controlled stopper mechanism.

A tubular member links two lumens via a crossover port, reducing overall diameter while maintaining fluid delivery efficiency.

A deployable assembly with hinged guards encloses tissue specimens within a funnel structure.

A cannula shields an implantable device during subcutaneous pocket creation, reducing tissue trauma and preserving device integrity.

Ratchet segments expand the frame circumference for large patients without non-sterile assistance.

A robotic surgical system uses magnetic field sensors to measure instrument depth without x-ray imaging.

Asymmetric tube configuration reduces burr deflection and prevents aspiration clogging while preserving surgical visibility.

A single operation wire actuates a distal grip and bending portion to lift lesions during endoscopic procedures.

A surgical retractor uses a tensioned stability thread to dynamically adjust its diameter for secure tissue engagement.

An inverting tube thrombectomy apparatus captures clots by rolling a flexible tube over an inversion support catheter.

A cannula assembly kit integrates a pattern generating member to project light onto the surgical site.

Automated zoom and focus optics in a 3D navigation system provide real-time depth perception, reducing surgeon fatigue from manual microscope adjustments.

A trocar assembly uses a compliant mechanism to release latches from receptacles, enabling secure instrument attachment.

Segmented catheters with pulsed vacuum aspiration cut emboli while minimizing native blood loss during vascular procedures.

Inclined tip cannula prevents subcutaneous emphysema by guiding gas flow away from vulnerable tissues during insufflation.

A catheter skirt forms a reversible seal with heart tissue to enable controlled pericardial access.

Dual cutters rotate in opposition to cancel mechanical forces, preventing tissue deformation and self-rotation during extraction.

Merging ligation, cutting, and retrieval into one device reduces instrument handling steps and minimizes risk of organ injury during laparoscopic procedures.

A surgical tool exchanger uses a pivotable elbow and actuator to retain replaceable instruments within the body cavity.

An endoscopic access device uses fluid seals to enable smooth instrument passage through natural orifices.

A magnetic coupling system drives an intraocular lens injector plunger through a sealed housing.

Segmented clip and sheath components resolve manufacturing complexity while securing the obturator against accidental stick injuries.

Nested sensors register images with reference data to resolve the trade-off between visualization capability and device complexity.

A transradial access device uses a protractor mechanism to control needle tip movement within a transparent sheath.

A valved introducer assembly uses a dual seal valve to accommodate various instrument diameters.

A proximal cannula camera uses a prism to redirect light from the lumen, enabling direct visualization of the surgical site without obstructing the passage.

Segmented elastomeric members distribute insertion forces to reduce strain and puncture risk while maintaining gas pressure.