Cannulas TRIZ Cases

Orthogonal slit membranes accommodate varying instrument cross-sections while maintaining fluid-tightness without complex adaptive mechanisms.

A directional dilation system uses a stimulating probe to map neural elements during surgical access.

Segmented anoscope design balances insertion ease with precise band application for hemorrhoid treatment.

Rotatable V-shaped members adapt to bird anatomy to prevent injury during automated grading, resolving the trade-off between throughput and animal welfare.

Resilient members deflect radially outward to snap onto the wound retractor, securing the clamp while maintaining insufflation pressure in single-port surgery.

Retention features on support arms prevent inadvertent sliding of the retrieval bag, containing specimens without spillage through small incisions.

An inverted retrieval sleeve prevents sample loss and contamination by surrounding the tissue before it passes through organ walls.

Mating interfaces constrain oversleeve positioning to prevent bending while valve assemblies manage fluid flow.

A flexible cannula features a monolithic body and an asymmetric distal flange that engages tissue.

Segmented gelatinous elastomeric seals prevent pneumoperitoneum leakage during multi-instrument manipulation, resolving seal reliability trade-offs.

A surgical access device uses a pressurized fluid plenum and nozzle assembly to create a gaseous seal around inserted instruments.

Segmented cannula shaft uses a compression spring to enable distal articulation while preventing collapse during robotic surgery.

An insertion apparatus integrates optical transmitters and impedance electrodes to detect tissue type during medical procedures.

Nested needles with tracking elements resolve positioning accuracy trade-offs during minimally invasive vagus nerve stimulation procedures.

A single-entry umbilical port combined with vaginal access enables complete hysterectomy and organ removal through minimal incisions.

A balloon dilation catheter expands constricted sinus ostia to restore drainage pathways.

A hydratable hemostatic membrane expands upon contact with fluid to seal vessel puncture wounds introduced by interventional procedures.

Titanium-polymer ports enable MRI compatibility while maintaining structural strength for accurate hematoma drainage.

Coupled control automates instrument retraction before entry guide reorientation, preventing tissue damage during robotic surgery.

Porous foam and hydrophilic channels prevent skin maceration while maintaining closure integrity during wound swelling.

Segmentation isolates the endoscope from manipulation forces while rotation enables visualization.

A needle handle assembly uses a release sleeve and retention clip to attach surgical needles.

Undercut ports on compressible seal anchors prevent fluid leaks while accommodating surgical objects in narrow incisions.

A pericardial access device uses a deployable suction skirt to engage tissue and create a working volume for safe puncture.

A clot retrieving device uses an inverting flexible cover to ensheath the capture structure and engage obstruction material within a blood vessel lumen.

Axial compression from tissue anchors secures the apical cuff, reducing surgical time and bleeding compared to manual suturing.

Fluid pump and pressure-controlled valve recirculate insufflation gas through supply and return conduits.

Segmenting the sleeve and port maintains insufflation pressure while allowing flexible tissue site access.

Advancing the inner cylinder shortens the exposed manipulator arm length, reducing deformation and shaking during single incision laparoscopic surgery.

Segmented actuator assemblies with nested couplings resolve alignment issues and size constraints in robotic surgical end effectors.

A reusable tissue morcellator system uses interchangeable trocar heads and integrated gas inflow inlets for precise surgical control.