Cannulas TRIZ Cases

Segmented cannula design maintains fluid flow continuity during navigation, preventing lumen collapse in complex sinus cavities.

A cannula with a frangible distal end breaks away upon withdrawal to contain contaminated tissue.

Anatomical restraint element wedges poultry bone while movable needles deliver veterinary products through detection sensors.

Radiused distal tips minimize tissue trauma during brain access while integrated imaging provides real-time structural visibility.

A motorized cannulation tool uses a gripper rod to extend nested tubes for precise placement.

One-way ratchet locking eliminates counter-rotation requirements, maintaining abdominal pressure during hand-assisted laparoscopic surgery.

Segmented trocar channels reduce instrument interference, while elastic sealing rings prevent pneumoperitoneum air leakage.

A trocar puncturing device secures to a sleeving component via a bump and key groove mechanism.

Closed-loop neuromodulation system uses impedance sensing to detect tissue layers and coordinates electrical stimulation for precise submucosal implantation.

Dynamic irrigation pressure control uses patient blood pressure to prevent tissue damage while maintaining surgical visibility.

Nested sequential dilators expand tissue pathways to reduce trauma, avoiding prolonged surgery times caused by cumbersome manual dilation steps.

An expandable tissue container integrates a deployable guard and cutter for specimen processing.

Movable blades anchored to a flexible body remove compressive ligamentum flavum while preserving adjacent bony structures and spinal stability.

Offset bore dilators with integrated electrodes enable controlled tissue expansion and real-time nerve monitoring to avoid neural damage.

A surgical seal assembly uses a centering mechanism to maintain alignment within the instrument valve housing cavity.

Interchangeable guide platforms and virtual trajectory overlays resolve device compatibility limits in surgical navigation.

Composite pads with embedded fibers increase tensile strength and reduce elongation, preventing cutting element separation during balloon expansion.

Minimally invasive tissue modification device extracts impinging ligamentum flavum while preserving vertebral column stability and reducing long-term morbidity.

Rotating angled cannula segments navigate anatomical pathways, reducing instrument collision risk in robotic surgery.

Interlocking handle and hub formations transmit torque to a bent stylet, enabling effective adult bone penetration despite manufacturing constraints.

A multimodal surgical gas delivery system dynamically adjusts insufflation flow to maintain stable body cavity pressure during laparoscopic procedures.

Integrated gas mixing chamber and sterile filter reduce preparation complexity and error risk in retinal detachment treatments.

A self-anchoring surgical access port uses convex and concave regions to secure itself without sutures.

A frameless stereotactic access device uses mounting arms and a rotating sphere to guide medical instruments.

A heart closing device integrates sensors and actuators into a ring structure for physiological monitoring.

A cranial access guidepiece establishes optimal trajectories using an imaging device.

Adjustable linkages and locking mechanisms in a surgical support frame enable precise positioning of multiple cannulas relative to the patient.

An expandable access device creates a temporary cavity to visualize posterior thoracic structures through the diaphragm.

Universal surgical instrument guide channels robotic arms to align instruments along a single axis, eliminating k-wire complications during spinal procedures.

Port tracking device maintains neuronavigation accuracy during minimally invasive surgery by integrating multi-segment path trajectories.

Segmented internal and external retractor components resolve electrical discharge risks while maintaining surgical access through small incisions.

A surgical seal anchor member adjusts its length through folding to match patient tissue thickness.

An invaginator grips the esophagus with vacuum pressure to enable precise rotational tissue manipulation.

A medical instrument lever pivots without a shaft to couple pushbutton movement with an effecting device.

A fistula plug incorporates a removable core material to boost column strength, enabling safe delivery through complex tracts while reducing infection risks.

A multi-chamber dosing apparatus uses a spring-loaded magazine and plunger to automatically expel antibiotic paste and teat sealant through a single nozzle.

A coaxial surgical needle assembly integrates multiple instruments within a hollow shaft to enable precise manipulation through small access ports.

A slotted transparent cannula enables direct visualization through the instrument shaft, resolving trade-offs between surgical precision and device complexity.

A laser cleaning arrangement directs a beam through a light guide to sterilize medical instrument channels using steam bubble agitation.

Magnetic introducers couple via attractive force to position treatment devices, reducing surgical site crowding and improving visualization.

An external magnetic field moves a detachable endoclamp inside the body cavity, reducing surgical trauma and post-operative scarring from multiple incisions.

A three-chamber cannula uses an inflatable balloon to anchor in the vena cava while maintaining a constant internal diameter for blood flow.

A ring-shaped protective device uses asymmetric elements connected by film hinges to swivel and cover surgical sealing components.

Stacked coil antenna detects conductive piston position via electromagnetic induction for precise substance quantification.

Converging sensors create a stereoscopic view that restores depth perception lost in monoscopic minimally invasive surgery.

Rotating an adjustment cap moves radial jaws to vary the drill guide cavity diameter, reducing instrument count and soft tissue injury during surgery.

A low-friction hemostasis seal uses a hydrophilic coating to reduce friction during vascular access device insertion.

Segmented cutting elements on a rotating helical coil penetrate and sever fibrin strands while the dull ramp edges protect vessel walls from damage.

Inflatable proximal member adjusts radial dimension to fit tissue tracts, resolving adaptability complexity trade-offs.

A flexible surgical shield with varying wall thickness protects collateral soft tissue during trans-orbital procedures.