Cannulas TRIZ Cases

Angled nozzle ejects fluid directionally to clean surgical instrument lenses, reducing water residue and mold deformation in access assemblies.

A continuum robot control apparatus estimates angle restriction values based on detected end positions and lumen structural information to restrict driving units.

A gun-shaped injection apparatus uses a movable head and needle holder to deliver medicament at predetermined angles.

A catheter uses a mechanical oscillator to inject liquid pulses into an aspiration lumen.

Optical imaging system monitors tissue oxygen saturation to detect vascular proximity during lateral spine surgery instrument advancement.

Segmented barrels allow simultaneous guide path establishment and stone extraction, eliminating repeated invasive procedures.

Networked subordinate pumps in a multi-modal surgical gas circulation system generate gaseous seals at access ports, reducing leakage and mechanical wear.

A medical implement uses a pivoting rocker to actuate adjacent valve assemblies, enabling independent control of suction and irrigation flow.

Integrating ultrasound guidance and electrical stimulation into a single control clip reduces procedural time by enabling single-person operation.

An elastic silencer buffers impact forces between sealing components, eliminating noise generated during laparoscopic instrument insertion and removal.

Variable thickness sections in the obturator assembly prevent rotational movement while maintaining a secure seal during minimally invasive procedures.

A skin treatment device atomizes liquid at a pre-defined pH value to cleanse the skin surface.

A pleated trocar shield guides instruments through a convergent opening to protect elastomeric seals from mechanical damage during insertion.

Segmenting the vision module from the reusable body enables autoclaving, reducing complexity while improving sterilization reliability.

A tubular sleeve with a temporary closure maintains insufflation pressure during instrument insertion, resolving seal complexity trade-offs.

Rear support surface stabilizes the syringe barrel during dispensing, preventing tip damage and contamination risks from sideways cap removal.

Segmented trocar holder adapts to varying diameters via interchangeable clamps, reducing tissue strain and maintaining sterility.

Collimated beam display optical system resolves incision size versus visualization quality trade-off in minimally invasive surgery.

Segmented retractor segments retain a silicone sleeve to stabilize muscle tissue, eliminating rigid fixation movement.

A cannula seal with symmetrical insertion and retraction friction enables precise instrument control.

A smoke collecting trocar uses charged plates to ionize and attract surgical smoke particles via electrostatic precipitation.

A radially expanding trocar uses an internal balloon to inflate the cannula diameter for safe extraction of enlarged gallbladders.

Nesting the implant within a cannula simplifies surgical complexity while reducing intraocular pressure.

Retractable blades on a dissection instrument expose the presacral space, enabling safe graft fixation while avoiding middle sacral vessels.

Nested inner needle and elastic cover portion restrict relative axial movement, preventing erroneous puncture during interatrial septum procedures.

Flexible blade hinges and separate anchor ports resolve the trade-off between structural stability and surgeon view obstruction.

A rotation biopsy handle drives a cannula assembly to sever tissue samples using an integrated partoff tab mechanism.

A conformable wound dressing applies negative pressure to remove exudate while delivering therapeutic agents through integrated fluid channels.

Lobes sutured to the skull secure a hub that stabilizes wands, while demarcations on the wand provide depth control within limited burr holes.

Side window in the cannula allows direct visualization of cerebrospinal fluid flow, reducing procedure time and improving placement accuracy.

A magnetic clamp mediator secures the endoscopic camera cable during retrieval through the abdominal wall.

Staple cartridge chassis support protrusions raise the inner peripheral surface of a surgical port to allow knife passage underneath.

A conformable wound dressing recirculates irrigant fluid through a biodegradable scaffold to cleanse the wound bed.

Heat-set braided sheaths reduce tissue trauma and friction during endoscopic procedures by combining flexible structural support with lubricious coatings.

Segmented parallel channels in the optical cannula allow independent scope repositioning to prevent obstruction during minimally invasive surgery.

A percutaneous access pathway system uses a lockable port and sterile barrier to enable safe re-accessing of body spaces.

Radial deployment of flexible fingers enables precise mesh placement while preventing damage during insertion.

A positioning system aligns instrument shafts with entry guide channels, controlling bending stresses that damage instruments during single-port insertion.

A fluid jet device uses a piezoelectric element to generate high-frequency pulsation within a small fluid chamber.

Segmented apertures in the nasal rinse tip distribute flow to prevent tissue displacement while maintaining high fluid delivery efficiency.

Centralizing wires center cutting wires inside the valve lumen to remove stenosis while preventing vessel wall damage during minimally invasive repair.

Segmented needle articulation resolves the trade-off between tissue penetration strength and navigational adaptability in complex vascular environments.

Flexible sleeve constrains annular dam diameter to prevent tissue trauma during surgical portal creation.

A transapical introducer uses a translucent tube and wiper seal to detect and remove air bubbles during minimally invasive heart procedures.

Nested optical fiber lumen within an aspiration channel enables precise laser control and stone fragmentation in narrow body lumens.

A cannula mounts a camera proximally with an optical prism to redirect light into the lumen, resolving visualization obstruction during brain surgery.

Segmented sealable openings in a resilient valve member enable simultaneous passage of multiple elongate medical devices while maintaining secure hemostasis.

A medical container uses a permanent gas tube to transmit pressure changes for controlled liquid discharge.