Guide Needles TRIZ Cases

A dual-polymer catheter tube adds column strength for direct central insertion, avoiding Seldinger steps and lowering trauma and contamination risk.

Separate lumens and independent push rods enable repeat biopsy marker placement without reloading while reducing pneumothorax risk.

A nested introducer and auxiliary sheath uses detachable fastening and flushing to limit leakage, bacterial entry, and insertion trauma.

A compressed gas-permeable filter in the air vent passage stabilizes air discharge while blocking blood leakage under pressure.

Adjustable manifold branches spread reduced pressure across complex wound cavities through one incision, improving drainage while limiting tissue trauma.

A slidable suction extension and guide catheter maintain aspiration through tortuous cerebral vessels while pressure sensing helps reduce embolization.

A three-part film-hinged body supports automatic cannula retraction, simplifying assembly while reducing contamination and needlestick risk.

A snap-lock sheath and integral slider simplify IV catheter protector assembly while retracting the needle for secure containment.

An intermediate tubular sleeve boosts catheter pushability while preserving distal flexibility and a slender profile to reduce vessel injury.

A low-profile sheath expands for large-device passage while limiting vessel wall forces, trauma, and added axial contact.

A flow regulator modulates catheter blood draw pressure to limit shear stress, prevent vein collapse, and improve sample collection.

Real-time 3D navigation and transillumination improve guidewire placement, enabling more accurate balloon positioning in hard-to-visualize anatomy.

A nested needle guard and dual valves help the catheter hub prevent blood leakage after needle removal while reducing accidental needle pricks.

A two-piece central catheter and split introducer enable short-needle venipuncture, blood flashback confirmation, and artifact-free placement.

A finger-actuated hub retracts the needle during withdrawal, while a cotton-plastic shield covers the tip and absorbs residual blood.

A movable introducer and actuator let a catheter extend past the peripheral IV tip for blood extraction with less hemolysis, delay, and discomfort.

A tapered single-piece RICC tip dilates tissue and the vessel lumen during insertion, removing the separate dilator and reducing insertion force.

A slit guide tube enables sequential placement of multiple biliary stents over one guidewire, reducing repeat insertion and procedure complexity.

An expandable scraper and inverting tube remove large soft clots more completely while limiting vessel wall damage during thrombectomy.

A guide element with annular control features improves visibility and vessel access while reducing accidental punctures and deployment complexity.

A unified catheter insertion tool combines needle, guidewire, and catheter advancement to cut procedural steps and reduce placement errors.

A valve-aligned needle slot keeps the guidewire sealed and ready, enabling immediate vessel entry without syringe disconnection or access loss.

Pinch members move the catheter through a guide tube without direct contact, reducing kinking and microbial entry during blood draw.

Dual-friction inner liner zones let a braided catheter combine fast device insertion with temporary gripping for precise guidewire or balloon positioning.

A continuous puller wire, aligned washer holes, and a tight cover fit enable predictable bi-directional catheter deflection with less skewing.

A finger-driven wheel advances the guide wire and catheter with one hand, improving ultrasound-guided placement accuracy while maintaining sterility.

A sealing member closes the gap between the inner core tube and inner catheter to stop blood leakage and remove pre-procedure air removal.

A notched catheter hub shortens clip release travel, enabling compact needle shielding with lower assembly complexity.

A high pressure clip and needle protection clip create controlled fastening in a shorter catheter shield that supports one-hand use and simpler assembly.

A notched hub collar and spade-mounted clip shorten needle shield disengagement while keeping the catheter assembly compact and protective.

Nested sliding hollow bodies lock the catheter against slippage, then allow controlled one-handed advancement to the desired insertion length.

Tapered regions, side ports, and vibration at a blunt cannula tip reduce pressure buildup and keep drug flow continuous during delivery.

Real-time fiber-optic visualization and guidewire steering let a microcatheter navigate the subarachnoid space for minimally invasive therapy delivery.

A deployable anchor cuff lets a dilator and catheter advance as one smooth profile, cutting procedural steps and vessel trauma in small-vessel access.

A pre-assembled needle, dilator, and guidewire clamp layout cuts dialysis catheter placement steps while helping maintain sterility.

Bleed-back sensing triggers spring-driven catheter advancement after vessel entry, easing placement in small or collapsed vessels.

Adjustable pivot points and independent sheath deflection improve implant alignment in variable left atrial appendage ostia.