Cannulas TRIZ Cases

Segmented openings and a slidable sleeve maintain strong suction force at the distal end, preventing clogging from blood clots during surgery.

A motor-driven inner cannula and outer coax cannula system performs precise drilling and sawing actions for core tissue sampling.

A trocar stability assembly uses a rotatable cannula retention member to secure surgical tubes within a base passage.

Spiral and slide grooves guide a reciprocating member to adjust needle exposure length, preventing bending while maintaining skin tension via suction.

Inflating a placement balloon creates reactive resistance against the flaccid bladder wall, enabling controlled blunt force dilation via an obturator.

Nested hollow members adjust overlap to change passageway sizes, eliminating instrument exchanges that increase anesthesia duration.

A flexible nozzle applicator adjusts its head orientation via an outer tube to deliver therapeutic agents across a wide surgical area.

A multi-channel biopsy sheath uses a hyperbolic cross-section to house separate instrument pathways for independent advancement and retraction.

An elongate tissue modification device applies tensioning force to abrade impinging neural tissue via abrasion, preserving spinal stability and mobility.

A medical instrument fixation device connects to a trocar housing and uses a translational actuation member to shift between open and closed configurations.

A built-in slider moves the treatment tool axially to track the field of view without enlarging incisions.

A cannula assembly incorporates a locking device to guide functional medical threads through its lumen.

A transparent anoscope housing integrates ligation band deployment and vacuum suction ports for simultaneous tissue manipulation.

Mechanical fire lock prevents inadvertent firing during unarticulated navigation, reducing tissue damage risk while maintaining reliable operation.

A percutaneous biopsy needle features an expandable distal section and a rotating inner cannula for tissue sampling.

Segmented overtube channels guide endoscope and treatment tool independently to maintain stable observation images during surgical procedures.

A catheter with a self-expanding distal tip expands to receive and aspirate clots from blood vessels.

A detachable converter rotates around a cylindrical retractor to position surgical ports for versatile organ access.

An elastomeric cannula with an interference seal preserves pneumoperitoneum and enhances tactile feedback during minimally invasive surgery.

An articulated medical instrument shaft employs a three-bar linkage to pivot segments, providing force support at hinges while maintaining a compact profile.

A trocar assembly uses a retractable protection assembly to cover the cutting component during insertion.

A catheter with unlocking features engages locking features on a medical instrument to control stiffness during procedures.

Electronic adaptor integrates dual imaging sensors within a compact guide to deliver stereoscopic visualization through narrow surgical ports.

An arcuate seal member adjustably engages instrument valve housing surfaces to maintain reliable sealing contact during surgical manipulation.

A universal fluid flow valve directs gas through distinct pathways within a surgical access port, reducing component count and assembly complexity.

An expandable tube secures a tether member within a catheter shaft to prevent misalignment during implantation.

An expandable protective device guides medical instruments through nasal cavities while shielding delicate mucosal tissue from mechanical trauma.

Sheath-mounted flap-tips engage the frenulum to prevent reattachment while reducing caregiver discomfort during infant stretching procedures.

A retractable snare loop energized as an electrosurgical tip dissects tissue and engages gastric implants.

A single-pass expandable tissue dilator reduces muscle trauma and procedure time by replacing sequential instruments with one radial expansion mechanism.

Catheter uses an annular seal to confine high-pressure fluid flow, preventing vessel damage while enhancing aspiration efficiency.

A permanent umbilical hollow tube provides direct body access via a valve and guiding member system.

A collapsible trocar set uses a retractable sleeve design to shorten the external length for safer minimally invasive surgery.

A manual pump system uses a dual one-way valve mechanism to deliver fluid through a nozzle assembly.

Deflectable struts stabilize the distal tip to form a passageway from subintimal areas back into true lumens.

Expandable buttresses in an insufflation retention device create reliable seals around probes, preventing gas leakage during abdominal interventions.

Gas jets directed through trocar outlets remove fluid from seals, preventing lens contamination during laparoscopic procedures.

A fluid feed maintains counterpressure in an extraction bag during morcellation, preventing tissue compression and re-introduction risks.

Segmented seal design maintains pressurization for visualization while allowing graft introduction.

Vacuum lumens or radially biased stabilizing members anchor the duodenum, reducing peristaltic motion and enabling precise cannulation of the ampulla of Vater.

Screw-driven adjustable flexible aspiration cannula reduces cortical trauma by adapting to curved vertebral body geometry.

Segmented incisions and 3D visualization reduce scarring and infection risk during arteriovenous fistula creation.

A sliding distal component assembly uses a pulley system and pull wire to move the catheter tip.

Segmented retractors and integrated illumination reduce tissue trauma by eliminating sequential dilation and external light sources.

A flexible elastomeric seal accommodates proximal and distal translation of movable endoscope members.

Segmented trocar segments adjust working length to maintain maneuverability while preventing organ displacement and gas pocket formation.

An access device integrates a camera, balloon, and illumination to stabilize instruments within the pericardial space.

Integrating a light source into a transparent blunt tip improves navigation accuracy and reduces procedure time for bariatric surgeries.