Cannulas TRIZ Cases

An integrated optical waveguide and ultrasound probe in a puncture needle enable direct visualization of the path, resolving positioning inaccuracies.

Segmented ports enable specimen removal without converting to open surgery, reducing complications.

Segmenting the septum into stationary and movable portions absorbs connection stress, preventing tearing while maintaining a secure fluid seal.

A single-port laparoscopic system uses a pivoting tool introducer to deliver interchangeable surgical instruments through a narrow channel.

A modular surgical tool uses an interchangeable working end to enable precise instrument exchange through minimal incisions.

A telescoping guide tube assembly transitions between extended and retracted positions within a surgical access port.

Segmented inflatable membranes anchor cannula and maintain pressure gradient without rigid protrusions, reducing patient discomfort.

Directional rigidity in the beam maintains stability under load while enabling multi-degree-of-freedom navigation through a single port.

Ultrasonic welding connects the trocar sleeve housing and sealing structure to resist surgical torque and prevent CO2 leakage.

A tubular diaphragm twist seal adjusts access channel size via motor spring power assisted rotation of an actuating ring.

Elbow coupling joint assembly with planetary gears enables abdominal cavity access without large incisions.

A robotic surgical tool assembly uses a locking mechanism to couple a working tool within a dilator for precise axial movement.

Segmented handle and needle assemblies allow independent sterilization, resolving single-use safety hazards in sling delivery systems.

Vacuum compression clamps laminar elements to counteract reactive forces during minimally invasive surgery.

Cannulated plug secures vacuum pressure in gastric tube lumen, preventing fluid spillage during bariatric navigation.

Slack in electrical wires accommodates a movable camera along a trocar cannula, preventing wire damage from motion while maintaining a fixed position sensor.

An elastomeric band mechanism cleans endoscope lenses through the port, eliminating removal time and infection risks.

Composite gel and fabric seal maintains pneumoperitoneum integrity around varying instrument diameters by adapting to angular manipulation.

Segmenting a cannula into rigid and flexible zones via overmolding resolves stability trade-offs while internal dams prevent fluid leakage.

A visualization stylet with an integrated light source and photodetector chip extends beyond the needle tip to illuminate tissue during insertion.

A sliding instrument sleeve creates a fluid flow gap that removes emboli, preventing air entry into the heart while maintaining secure anchoring.

Expandable catheter retractor stabilizes tissue against peristalsis to resolve working space collapse during minimally invasive procedures.

A trocar controller enables medical instrument functions only upon verified insertion via conductive or inductive detection.

An ultrasonic surgical instrument uses dedicated fluid ports to manage irrigation and suction for effective debris removal.

Flexible membranes and resilient rings allow multi-instrument access through a single incision, reducing surgical complexity.

Multiple overlapping seal segments reduce hoop stress and tearing risk, enabling reliable sealing for large diameter instruments without excessive normal force.

Wireless scanning detects adjacent organs to guide needle insertion, preventing tissue trauma during abdominal insufflation.

Segmented lumens with a selective valve prevent foam expansion from damaging the dressing seal during instillation, avoiding peri-skin maceration.

Deformable canopy routes liquids away from the camera lens, preventing soiling and maintaining visibility without interrupting surgery.

A self-adjusting perforating port retracts its blade upon entering a body cavity to maintain a hermetic seal.

Inflatable members in a surgical port assembly apply controlled force to instrument shafts, reducing reliance on complex robotic systems.

A flexible sheath system accommodates multiple surgical instruments through a dynamic passageway.

A cystotomy dilator uses a capture cup to guide the cutting tip along a predetermined path.

A mantle tube uses an angle holding mechanism to maintain a precise bent shape through friction between interconnected members.

Reusable cannula assembly slides along a rail mechanism to enable precise steering within the abdominal cavity.

Protruding insertion portion expands observation range in narrow nasal paths while maintaining navigation stability through nested guiding structures.

Elastic interlocking synchronizes endoscope and treatment tool motion, reducing coordination complexity during single-handed laparoscopic procedures.

Segmented support units and a nested mechanism allow independent instrument arrangement, reducing the size and cost of the surgical support device.

Segmented trocar and flexible cannula reduce patient discomfort during extended wear while maintaining reliable fluid pathway integrity.

Elastic and inelastic cables tension the shaft to resist side loading forces that deform bendable sections.