Cannulas TRIZ Cases

Countersink inner surface prevents sample crushing and loss in small gauge needles.

A medical access trocar uses a helical tine to lift tissue surfaces for stable entry points.

A surgical film device uses a drawstring to form a sealed sterile pocket around extracted organs.

A multichannel cannula guides a stabilizing wire through bone while delivering substances via a dedicated fluid channel.

A minimally invasive intracardiovascular access system enables safe instrument introduction through small punctures while maintaining an air-free environment.

A grip section and thumb-operable input mechanism secure the instrument trunk via index finger friction.

Axial guide groove mediates step passage through dome seal, preventing radial instability during extraction.

A steerable puncture device uses direct vision imaging to position a needle within a protective sheath for precise tissue access.

Torque-driven nozzle rotation ensures uniform substance distribution, preventing selective spraying and uneven application.

An indicator rod detects dura mater surface contact, enabling accurate inner cannula piercing and reducing injury risk to adjacent brain anatomy.

A multi-lumen access port uses pivotally connected tubes to enable simultaneous instrument insertion through a single incision.

Retrograde diaphragm access creates a temporary cavity to visualize posterior heart surfaces without sternotomy.

An endoscope overtube hub uses an inflatable elastic sleeve to form a fluidtight seal around the instrument shaft.

An articulating mechanism pivots the cutter tip to reach off-axis locations, resolving limited excursion in minimally invasive spine surgery.

An insufflation retention device uses an expandable balloon to form a seal around a probe entering a body cavity.

Offset overlapping chambers in a surgical access device distribute inflation pressure to reduce wrist discomfort during laparoscopic procedures.

An ovalized cannula design increases contact patch area to reduce friction and stick-slip during single port access surgery.

A surgical retractor uses a gel pad to form a seal around the outer ring and sleeve.

Merges mounting and alignment functions into the introducer assembly, resolving the trade-off between surgical guidance precision and system complexity.

Segmented guide stems enable chronic burr hole placement without instrument perturbation during removal.

Flexible ring retracts tissue using hook fasteners to minimize trauma from rigid trocars.

Inner tubular member oscillates within outer body to cut uterine fibroids through small diameter access.

Speculum-mounted cannula stabilizer constrains hand tremors to prevent cervical canal injury and bleeding during embryo transfer.

Activation extensions on trocar seals open the wall before instrument contact, reducing fluid buildup and drag during surgical procedures.

An integrated sensory system in a sclerotomy port tracks eye orientation, resolving the contradiction between measurement precision and device complexity.

Integrating a camera and LED into an arthroscopic cannula eliminates separate portals, reducing incisions while enhancing real-time tissue monitoring.

A variably exposed cutter angles via a nitinol hinge to slice plaque, while high pressure jets evacuate debris and reduce embolization risk.

A soft tissue access support device integrates a sealing member and securement tube to stabilize puncture sites during minimally invasive procedures.

A guidance pad displays real-time depth and trajectory indicia to assist percutaneous access needle insertion.

Nested introduction system places large-bore scopes through small openings, reducing injury risk from multiple penetration attempts.

A suprasternal access device guides instruments through the pericardium to reach the left atrium without sternotomy.

Estimating the approximate center of rotation using existing gyro data corrects hand shake and rolling shutter distortion without adding sensors.

A multimodal gas delivery system maintains continuous flow to and from a body cavity using a processor-controlled pump.

Hyperbolic anchoring reduces abdominal trauma while a plenum chamber maintains peritoneal pressure via a constant gaseous seal.

Anchoring catheters deliver anesthetics into specific discs to pinpoint discogenic pain sources, reducing false positives from invasive traditional discography.

Injecting procoagulant material via a sheath nozzle into tissue tracts eliminates manual compression requirements and reduces hemostasis procedure time.

Automated tracking replaces manual assistant operation, maintaining a stable field of view for minimally invasive procedures.

A tissue cutting device with an adjustable delivery sleeve enables precise fluid and ancillary tool placement during neurosurgical procedures.

A hemostatic powder delivery device uses a manual air pump, porous filter, and spring to express powder through an elongated reservoir.

Segmented seal assembly reduces hoop stress and tearing by distributing strain across overlapping segments during instrument insertion.

A refrigerated pressurized vessel maintains vaccine infectivity by replacing heat-generating syringes with regulated air pressure.

A balloon port device maintains a stable aperture through natural body openings to enable minimally invasive intra-abdominal surgery.

Segmenting the outer sheath from removable obturators reduces tissue trauma while maintaining secure positioning through a rotation brake mechanism.

Self-sealing ports on surgical masks enable instrument access without compromising the particle filtration barrier.

Inflatable pad seals working channel to maintain cavity pressure during flexible endoscope and rigid instrument use.

Segmented lumen structure drains excess fluid from surrounding tissue via central apertures, preventing extravasation complications.

Segmented sealing channels resolve tissue collapse by enabling independent instrument motion within the surgical site.

An expandable surgical access device manages fluid delivery and removal through a pliable membrane structure.

Integrating MRI, ultrasound, and optical sensors into an access port enables high-resolution intraoperative imaging while minimizing tissue disturbance.