Guide Needles TRIZ Cases

Slit leaflets in a catheter valve assembly open during male luer insertion to control fluid flow while preventing proximal leakage and blood exposure.

Stepwise angle changes in a segmented dilator lower operator resistance during insertion.

A hub assembly secures a fiber-optic treatment member within an introducer sheath to enable precise medical device positioning.

An elongated needle support housing extends beyond a guard housing to provide continuous proximal access to the internal fluid path.

Arterial access sheath delivers prosthetic aortic valves via transcarotid routes, resolving positioning accuracy and embolic risk contradictions.

Foldable wings overlay a raised orientation member to prevent rotation, while a frangible cap breaks at a controlled point to expose the needle tip.

A needle assembly uses a hollow flashback chamber and air vent filter to detect vein entry.

A closed extravascular system incorporates a gas vent with sealing mechanisms to release trapped air from the fluid path.

A sealing catheter isolates a blood vessel section to enable localized therapeutic delivery.

Electromagnetic sensing resolves positioning precision trade-offs by enabling accurate device placement without complex mechanical guidance structures.

Segmented lobe design restricts retrograde flow while maintaining low delivery profile.

A needle retraction apparatus uses a rotatable tube to align and retract the needle into a rearward cavity.

A sliding safety device encloses a needle tip using an integrated closure element triggered by axial withdrawal motion.

A catheter hub assembly uses a snap-fit mechanism with lateral ribs to secure components without adhesives.

Platform maintains catheter stability at optimal insertion angle via angled upper surface, resolving instability risks during fluid infusion.

Integrating a porous coil into the catheter tube reduces wall shear stress and thrombosis risk by allowing blood to pass through the device wall.

Flattened flexible extension tube prevents kinking and vein damage in neonatal catheters.

Safety needle assembly with diagnostic sampling port enables flashback chamber fluid access.

A steerable introducer sheath uses a pull wire to deflect the distal end, reducing wall thickness and vessel trauma.

Expandable needles deliver ablative fluid through vessel walls to target sympathetic nerve fibers, avoiding thermal injury and stenosis risks.

A deforming member compresses the hemostatic valve passage after insertion, resolving leakage resistance issues while maintaining ease of operation.

A safety catheter uses a locking guide unit with a through-hole that deforms upon needle withdrawal to block re-penetration.

Segmented optical connectors and universal adapters reduce infection risks by minimizing tissue access points during photodynamic diagnosis.

Segmented needle components reduce friction-based drag forces, preventing catheter dislodgement and clinician needle-stick injuries.

A needle safety device adapts to variable needle thicknesses using a deflectable second jaw, reducing structural complexity and manufacturing costs.

Relay connector injection opening directs priming liquid through a support tube, reducing flow path resistance while preventing drive shaft deformation.

Silane coatings on tungsten particles preserve mechanical flexibility and prevent degradation during fluoroscopic imaging.

Nested inflatable members and dynamic control resolve raised profile issues in narrow vascular deployment.

Expandable catheter injects neurotoxic fluid into vessel walls to ablate nerve fibers, eliminating thermal injury risks from radiofrequency systems.

A deflectable mapping guide sheath positions pacing electrodes near the bundle of His using a pull wire mechanism.

An automatic disinfection mechanism uses a spring and antimicrobial flap to cover a vascular connector, resolving inconsistent manual cleaning protocols.

Nested helical packaging preserves catheter sterility while enabling compact storage, resolving the trade-off between volume reduction and contamination risk.

Exterior fluid injection avoids intimal injury and procedural pain while achieving complete circumferential nerve denervation.

Segmented housing and porous vents resolve delay in vein entry confirmation while maintaining negative pressure to prevent leakage.

Segmented cannula holders resolve manufacturing complexity by accommodating various gauge sizes within a single universal component.

Magnetic alignment positions the catheter electrode to ablate tissue with square wave voltage, reducing procedure time compared to surgical dissection.

A pre-formed barb on the needle connector end prevents disengagement under high pressure by creating a mechanical interlock secured with UV-cured adhesive.

A prostate catheter uses radial outflow openings to distribute injected agents across tissue.

A steerable guide member integrates an optical fiber to transmit illumination through a flexible coil structure.

A flash chamber in the needle hub provides visual confirmation of catheter placement.

A disposable cannula insertion device uses sliding parts and elastic retraction to hide the needle during administration.

A split-tip catheter uses nested venous and arterial segments to maintain a smooth columnar profile during insertion through tortuous vascular paths.

A syringe plunger advances a guidewire through a U-shaped channel to clear catheter obstructions, extending dwell time and maintaining patency.

A dual lumen hemostatic valve segments guide wire pathways to prevent entanglement during complex interventions.

A needle protection device uses a duckbill valve to shield the sharp distal tip within a hub.

Mechanical fluid injection via expandable balloons achieves circumferential nerve denervation without thermal injury or vessel stenosis.

Segmented stiffener breaks catheter-needle adhesion to enable deep vessel insertion without deformation.

A unified insertion tool integrates needle, guidewire, and catheter components into a single housing for streamlined medical procedures.

A proximal balloon on an extension catheter expands against a guide catheter wall to prevent slippage and improve axial stability.

A tapered guiding device moves along a guidewire to facilitate smoother catheter passage through blood vessels.