Cannulas TRIZ Cases

A biopsy needle assembly uses a rotating stylet to open and close a distal window for tissue capture.

A coaxial capture tool holds a blood vessel while an inner sealing tool cauterizes branches.

Piezoelectric actuators drive a drilling wire to fracture occlusive plaques while a guiding sleeve protects artery walls from thermal damage.

Flexible curved arms yield to align eggs automatically, eliminating manual orientation errors and preventing shell fracture during vaccination.

A cannula assembly combines a scope tube with a tool tube to enable single-hand control of an endoscope and surgical instruments.

An integrated ultrasonic cannula synchronizes irrigation, emulsification, and suction to reduce surgery time and minimize tissue trauma.

Segmented conduits and dynamic actuation resolve the rigidity-maneuverability contradiction, enabling precise lesion targeting during biopsy procedures.

A motor-driven electrosurgical device coordinates electrode movement with RF power and vacuum aspiration for precise tissue resection.

Micro-nanobubble systems resolve hypoxia in chronic wounds by delivering high oxygen tension through simple pneumatic generation.

Foldable light panels deploy from the trocar body to widen illumination, resolving endoscope head size constraints.

Flared base tips create suction to remove earwax without damaging the eardrum.

Sealing elements prevent fluid reflux along the internal lumen, ensuring precise therapeutic agent delivery to brain targets.

A braided access sheath uses a Teflon coating to reduce friction and protect nasal tissue during endoscopic procedures.

A tissue removal system uses electrosurgical energy to break down specimens within a conductive specimen bag.

Rollable disposable cover prevents cross-patient infection by creating a sterile barrier on the nozzle, eliminating complex sterilization steps.

Hybrid surgical devices convert manual instruments into robotically controlled ones to resolve force feedback and training contradictions.

A bellows biases a gimbal mount to align with the seal housing axis, preventing friction damage during angular instrument manipulation.

A medical device suction member applies negative pressure to a bursiform cavity through communication passages.

A syringe featuring a piston and cylinder opening delivers medication directly into livestock mouths.

An obturator uses a distal electrode to cut tissue for surgical access.

A minimally invasive heart stabilizer uses a revolute joint and suction end-effector to anchor cardiac tissue.

A parametric torso model computes permissible surgical port locations to replace subjective virtual reality simulations with objective geometric analysis.

Segmented sealing ports allow variable angular instrument insertion to eliminate the chopstick effect while maintaining insufflation pressure.

A cannula assembly uses a modular switching stick inserter to enable single-step placement over a standard 4 mm arthroscopy stick.

A torsion spring and cam assembly slowly advance a piercing member, reducing patient trauma during insertion.

A wound therapy device regulates fluid instillation via a pressure sensor and control unit. The system monitors negative pressure to manage drainage and supply lines.

Overtube sensors isolate instrument collision forces from bodywall loads, providing accurate force feedback during minimally invasive surgery.

Segmented arcuate elements in the gimbal ring constrict to hold a heart-mounted device, reducing tightening force while maintaining attachment reliability.

Independent pneumatic nozzles deliver uniform vaccine spray across multiple tiers, resolving clogging and distribution issues.

A spiral vaginal dilator with a buckling edge and control rod expands the field of view.

A universal coupling device connects conventional and laparoscopic instruments to a robot arm using an articulated joint system.

A telescoping cannula assembly uses a helical thread to extend and retract an inner tubular member for precise surgical portal positioning.

Evoked potential monitoring on surgical instruments determines nerve proximity, resolving measurement precision limits in neurophysiological tracking.

Radial biasing members extend inward to center surgical tools within trocar cannulas, minimizing unintended oscillation and vibration during robotic procedures.

A rectal catheter couples directly to a waste collection bag via an internal mating mechanism.

Segmented elastic coils bias the valve assembly to maintain seal integrity during radial instrument movement, preventing dynamic leaks.

Automated spray applicator mounts to poultry feeders via magnets for precise vaccine dosing.

A CO2 deflector assembly directs gas flow across a laparoscope lens to prevent fogging during minimally invasive surgery.

A thrombus engagement tool featuring a helical thread tip mechanically captures embolic material within an aspiration catheter lumen.

Flexible wipers in a cleaning cap remove debris from surgical lenses via friction, eliminating device removal delays.

A laparoscopic camera module switches operational modes using magnetic or photoelectric sensors to detect instrument position.

A modular surgical handle unit adapts to various vessel severing instruments for one-handed operation.

Spring-biased rollers maintain instrument alignment with the portal axis, resolving sealing efficiency versus precision trade-offs.

A retracting unit transforms a circular vascular puncture into a slit-like aperture for orthogonal device deployment.

Rotatable internal hub increments cannula depth to prevent lens damage during pars plana vitrectomy.

A surgical access system uses a mapping spacer and trocar to enable precise advancement of a distal cutting tip through tissue.

A disposable silicone valve with elastically deformable lobes seals abdominal trocar cannulas during instrument insertion.