Cannulas TRIZ Cases

Compacting a memory blade inside a hollow sheath resolves the conflict between narrow cannula insertion and large resection diameter.

A gimbal mount uses a bellows to bias its passage toward the central axis, resolving friction-induced misalignment during instrument manipulation.

Force sensors validate mechanical contact during registration, resolving slipping issues and improving accuracy.

A conformable wound dressing applies negative pressure and thermal energy to circulate fluid across the wound bed.

A transabdominal gastric cannula system uses internal and external anchors to stabilize the working channel for surgical instruments.

A medical instrument uses a hollow-cone receiving space and cone-shaped coupling section to connect parts via linear insertion.

Resilient gimbal mount maintains gas-tight seal during angulation, preventing leakage in minimally invasive procedures.

A portable veterinary injector uses a linear actuator to drive a hypodermic needle into muscle tissue via a flexible conduit.

Segmented electrode array deployed through a small burr hole reduces surgical invasiveness while maintaining precise seizure onset zone localization.

Offset counterweights on a drive shaft stimulate orbital motion of an abrasive section during high-speed rotation.

Segmented absorbent discs on a surgical cannula remove fluid materials before they obscure the laparoscope lens, reducing cleaning interruptions.

Segmented coaxial seals accommodate varying instrument diameters without exceeding material elastic limits, preventing leakage from side-to-side motion.

A flexible imaging endoscope integrates a fiber optic laser to ablate encroaching epidural tissue with direct visualization.

A modular intracranial injection device uses a separable tube unit to deliver therapeutic agents directly to brain lesions.

A catheter system uses mechanical drilling and cauterization to resect calcific aortic valves through percutaneous access.

A proximally mounted camera system rotates displayed images to maintain natural orientation during minimally invasive surgery.

Radially expanding slits in the catheter distal end accommodate oversized devices while maintaining column strength for insertion.

Extruded conduits joined to injection-molded coupling bodies resolve manufacturing complexity while ensuring process-reliable sealing and fluid flow.

Nested dilation tubes expand the incision directionally to prevent circumferential shift, preserving working channel position relative to nerves.

Tapered mechanical interfitting replaces UV adhesive assembly, eliminating curing equipment while maintaining secure component attachment.

An AI cannula diagnostic device senses surgical stroke and processes data to generate prognostic information.

A surgical access port uses a worm gear mechanism to articulate tubular members for precise instrument positioning.

A single port surgical system uses steerable cannulas and a linkage mechanism to orient instruments within the body cavity.

A cannula assembly houses imaging and illumination components within a deployable portion that transitions between closed and open positions.

A nasal cleaner uses a water pump and vacuum pump to manage fluid flow within the nasal cavity.

A seal assembly uses a ratchet mechanism to rotate upper and lower rings for controlled hand access.

A retractor port integrates neuro navigation and monitoring sensors within its structure to maintain a minimal profile during minimally invasive procedures.

A catheter with arcuate arms and pressure sensors navigates the mitral valve for accurate orientation.

An elastomeric access device uses a deformable bulb to secure anchoring while allowing free instrument movement through the lumen.

Multi-leaflet valve gasket uses pressure differential to close leaflets, preventing bodily fluid contamination while allowing instrument insertion.

Decreasing radii of curvature at the distal end create a penetrating tip that reduces force required for dilation and minimizes tissue trauma.

Orbital sealing elements rotate relative to the housing to reposition instruments, eliminating interference between tools during laparoscopic procedures.

Adjustable cannula length adapts to chest wall thickness for stable pleural decompression.

Dilation introducer enables minimally invasive intervertebral implant placement through a posterolateral approach.

Grooved inner tube creates inflation channel that prevents lumen and anchor collapse during deflation.

A locking mechanism secures a stylet within a cannula hub using nested protrusions and channels to prevent accidental disengagement during medical insertion.

A magnetic suctioning cannula integrates with surgical retractors to evacuate smoke during procedures.

A pivoting cannula uses a threaded surface to anchor in tissue, eliminating external clamping arms while maintaining stability during patient movement.

An offset motor drive assembly improves ergonomics while a nested cannula structure resolves the contradiction between cutting precision and device complexity.

A double-barreled injector assembly uses hand-operated actuators to dispense two distinct vaccines sequentially through separate barrels.

An extended stylet allows a gripping device to remain coupled during removal, reducing disassembly steps and infection risk.

Intersecting side cuts and an axially cut surface on a multi-lumen sheath guide a guide wire into the lumen, preventing deviation during insertion.

A pulling element draws the device into the swelling site, enabling reliable gastric wall penetration without surgical intervention.

A multi-tined connector with a locking sleeve prevents loosening under torque and axial forces during endoscopic procedures.

A unitary connector on the optical introducer sheath maintains continuous fluid recirculation, eliminating pump disconnection time during tool exchange.