Guide Needles TRIZ Cases

Using tungsten carbide and carbodiimide in the tip resin preserves X-ray visibility while suppressing hydrolysis during hot, humid storage.

A central flow diverter and expansion channel push flush fluid into circumferential dead space, clearing blood residue and lowering infection risk.

A multilayer sheath tip expands for device passage and returns to a smaller profile, reducing vessel trauma, tears, and procedure time.

An integrated introducer sheath cuts delivery profile for smaller vessels while maintaining hemostatic sealing and stable valve deployment.

A radially expandable sheath widens for pump delivery, then contracts to limit vessel opening, bleeding, friction, and clotting risk.

A tapered inner curvature at the adapter tip supports catheter bending, preventing kinks and occlusion while maintaining flow.

A coupled guidewire and safety slider keeps the guidewire secured until needle withdrawal, reducing shearing and retention risk.

A fluidly isolated gas-filled chamber eases large-bore device movement while maintaining hemostatic sealing in introducer sheaths.

A translatable balloon presses the drug-eluting catheter against the vessel wall to improve contact and achieve more uniform lesion drug delivery.

Magnetic nanoparticles are guided to the catheter tip and heated on demand to prevent thrombus and biofilm buildup without antibiotic lock therapy.

A flexible split sleeve seals the intravascular pump inlet during insertion, limiting blood loss without longer sheaths or rushed placement.

A tapered distal tip and reversible inner-outer lock help a coaxial catheter reach lesions with less vessel trauma and fewer dissection risks.

An adjustable clamshell slitter captures and cuts a tubular shaft without securing to the lead, easing removal and reducing transition jerk.

A tapered coaxial guide extension uses a releasable inner-outer catheter interface to deliver balloons and stents through tortuous vessels with less dissection risk.

A flexible split sleeve seals the pump inlet during insertion to limit blood loss without longer sheaths or rushed placement.

A collapsible introducer tip compresses an expandable catheter in tapered sheaths, cutting push force and limiting deformation.

A conical introducer with clip and suture combines dilation and device entry, reducing sheath changes, blood loss, and air introduction.

A dual-lumen catheter enables simultaneous tubal distension and precise agent delivery to the uterine cornua and proximal ostium.

A catheter-delivered Potts shunt prosthesis creates an aorta-pulmonary artery bypass to reduce surgical trauma and recovery burden.

An asymmetric joined-tube layout frees more guiding catheter lumen space for multiple auxiliary devices while limiting interference during procedures.

A lead screw dilator expands the sheath in a controlled way to lower prosthetic delivery push force and reduce vessel trauma.

An expandable memory-wire stent stabilizes the sheath in the vessel while enabling guidewire redirection without secondary punctures.

A polygonal cannula tube suppresses shaft echo while a retroreflective tip returns a strong echo for clearer ultrasound-guided positioning.

A protective cap with a sealed adhesive cavity fixes an IV catheter after insertion, reducing accidental removal, leakage, and contamination.

A locally expanding sheath enables single-insertion valve delivery, reducing vessel trauma, plaque dislodgement, and procedure time.

A zig-zag strut frame lets an expandable sheath pass curved vasculature with less kinking and insertion force during prosthetic delivery.

A mesh-and-liner sheath expands from a small insertion profile to a larger lumen, reducing vascular trauma while accommodating transcatheter devices.

Direct cisterna magna infusion of cooled CSF enables rapid brain hypothermia with feedback control and reduced tissue injury risk.

A flexible bushing with a corrugated or spiral seat keeps the catheter aligned with the hub, preventing kinks and preserving fluid flow.

A pin-flared catheter entry port widens the opening without increasing catheter profile, reducing device catching during delivery.

A retractable elastomeric sheath expands for device passage and recoils for removal, reducing vessel injury, procedure time, and infection risk.

A nested instrument lumen and cavity with spray apertures preserves cryospray coverage while allowing cryodecompression tubes in the catheter.

A splitable docking station holds the introducer during central catheter insertion, cutting steps while preventing guidewire embolism and contamination.

Internal fluoroscopic visualization with angled guidewires and catheters enables precise central vessel puncture while avoiding blind access risks.

Tissue expansion creates space to reorient a puncture needle during TIPS access, reducing withdrawals, procedure time, and injury risk.

A multi-path valve separates priming and dispensing flow so saline returns to the syringe instead of entering the catheter before medication.

A slit valve and safety clip stop blood backflow and lock the withdrawn needle tip to prevent spills and needle-stick injury.

Dedicated catheter ports and a nested flow tube enable blood draws and concurrent medication delivery without IV configuration conflicts.

A resilient snap-fit coupling keeps sheaths and dilators aligned while delivering uniform insertion force, tactile feedback, and clean release.

A spring-biased plunger advances the guidewire through the needle in one hand, preserving sterility and reducing needle movement risk.

A guidewire through the syringe and needle helps place a pliable catheter quickly in central veins while reducing dislodgement and improving access confirmation.

A locking protrusion and guide surface simplify valved needle assembly while replacing coil springs with an elastic disc valve for stable closure.

A deformable catheter creates a variable annular gap inside one introducer sheath, allowing multiple devices to pass through a single access point.

A bent wire tip clears thrombus and debris from indwelling catheters, helping maintain blood withdrawal without extra needle sticks.

A radially expandable sheath frame and smooth coating let large devices pass while limiting vessel opening, bleeding, friction, and clot risk.

A spring-based force gauge gives real-time feedback during access sheath insertion to limit ureter force and reduce perforation risk.

A curved needle with a pivotable base and expandable conduit improves vessel access, stabilizes placement, and lowers needle-stick risk.

A friction-zoned steering wire improves sheath deflection control while reducing mechanical interference during occlusive implant delivery.

A crank tip rotates on vessel-wall contact to turn axial push into deflection, helping vascular access wires avoid perforation and dissection.

Localized catheter delivery to cardiac ganglia uses biologics or denervation energy to reverse neuropathy while avoiding broad, nonspecific treatment.