Guide Needles TRIZ Cases

See how piezoelectric and strain gauge sensors detect catheter shaft deflection in real time, i

A protective sleeve with a depth gauge and adjustable magnetizer segments enables consistent needle magnetization without contamination or tip damage.

A deformable metal guide tube retains its bent shape to guide instruments through complex body lumens and stabilize access to treatment sites.

A telescoping anti-buckling tube stabilizes robotic catheter and guidewire delivery, reducing motion through long, tortuous neurovascular anatomy.

A shape-memory metal guide tube bends to match complex body lumens, then holds its form to guide instruments closer to treatment targets.

A dual retraction spring layout cuts inserter height while enabling perpendicular catheter placement and automatic introducer needle shielding.

Dual retraction springs in parallel barrels enable perpendicular catheter insertion with automatic needle withdrawal in a compact insulin infusion inserter.

Real-time sensor feedback lets an AI catheter tune sheath oscillation to remove large, hard clots faster with lower bleeding risk.

A synced user device handles PIN entry and transaction selection, cutting skimmer exposure and ATM keypad wear.

A mobile device handles PIN entry and transaction selection, cutting skimming risk while reducing ATM interface wear and component count.

A curved needle-catheter geometry aligns axially with the vein to prevent wall diving, reduce trauma, and improve blood draw and infusion success.

A telescoping tube with inner-diameter reduction shortens unsupported catheter length to limit buckling during deep neurovascular advancement.

Flexible interfaces and spacers at catheter and luer adapters reduce extension tubing kinks and maintain consistent fluid flow.

A sliding hollow-body septum improves catheter placement confirmation by controlling blood flow through sealed openings for clearer flashback.

Visible blood return in a flash chamber confirms vein entry, helping advance the catheter without over-advancing the needle.

Visible blood flashback confirms vein entry before catheter advance, helping avoid opposite wall piercing and insertion errors.

A combined axial-radial proximal bearing uses purge fluid to cut friction, block blood ingress, and support higher-speed intravascular pumping.

A bearing sleeve, outer ring, and purge-fluid gap reduce friction, block blood entry, and improve intravascular pump durability.

A purge-fluid bearing sleeve and outer ring reduce shaft friction, block blood ingress, and support higher-speed intravascular pumping.

A diaphragm with dual pressure-activated slit valves regulates catheter infusion and aspiration to reduce clot and embolism risk.

Interlocking ribs and wedge openings let a deflectable insertion tool bend through curved passages while staying rigid enough to apply force.

High-viscosity lubricant fills needle-septum gaps to limit blood leakage during catheter positioning and needle withdrawal.

Electrical sensing distinguishes tissue from blood or air during needle insertion, improving first-pass catheter placement and reducing repeat attempts.

Electrical impedance sensing distinguishes tissue from blood or air to guide catheter advancement and reduce repeat insertion attempts.

Guidewire sealing features shrink the needle annular space to limit blood egress while preserving wire movement and ISO 10555-5 compliance.

A single-shot molded catheter integrates the adapter and tube to remove weak junctions, improving impact durability and reducing leaks.

A splitter wedge lets the needle separate during withdrawal, keeping the guidewire in place and reducing trauma, contamination, and extra steps.

A flexible distal portion with graded rigidity helps the catheter avoid vessel wall catching at large puncture angles while preserving insertion control.

An invertible funnel tip helps clot retrieval catheters navigate tortuous vessels while improving aspiration and reducing distal embolization.

A soft catheter paired with a hard introducer adds column strength for faster central vein insertion with less trauma and contamination risk.

A stabilized near-patient port extension with removable needle-free connector improves blood draw reliability while easing flushing and reducing kinking.

A protected needle tip and returnable valve actuator enable repeated catheter fluid exchange while limiting exposure and coagulation.

A distal fenestration, flat relief, and transparent seal create two flashback cues for deep vein access while limiting blood leakage.

A flexible releasable coupling keeps catheter and dilator alignment stable with uniform retention force, tactile feedback, and low debris over repeated use.

Direct carotid access with aspiration and passive flow reversal shortens stroke thrombectomy while reducing embolic risk and brain injury.

Compressed shape memory polymer foam expands inside irregular aneurysms to improve occlusion, clot support, and delivery precision.

An inner and outer housing automatically trap the withdrawn cannula to prevent needle sticks and blood exposure during disposal.

Magnetic alignment and a sleeve-guided insert help locate subcutaneous graft cannulation sites accurately, reducing needle-stick damage and bleeding.

A passive seal-and-protector mechanism controls blood exposure and keeps the withdrawn needle tip enclosed for safer catheter removal.

Angled adaptors and side ports turn the ECMO circuit into a hemostatic vascular access route, reducing bleeding risk and device misdirection.

A lock nut and pusher compress the hub seal to limit blood leakage while securing and repositioning intravascular devices.

A notched cannula and flashback channel improve vein confirmation while a retention flange helps prevent septum dislodgement and blood leakage.

A steerable multi-lumen catheter delivers retrograde cardioplegia through the coronary sinus, avoiding open-chest access and reducing trauma.

A nested dual-catheter structure improves passage through tortuous cerebral and coronary arteries while maintaining support for thrombectomy access.

Optical fibers inside the cannula lumen emit and detect reflected light to provide continuous tip-position feedback during placement.

Radial push-tab ribs on a catheter hub resist free spinning during insertion, improving stylet engagement and alignment.

A deactivatable stiffening structure lets a thin-walled introducer sheath resist buckling, pass larger devices, and retract the dilator without dislodging the sheath.

A concertina tube and hydrophobic filter cut dead space and priming needs, enabling secure one-hand pediatric catheter placement.

A liquid-filled injection path and valve body purge air from an introducer sheath during device insertion, reducing embolism risk.

Configurable catheter modules and a lock-grip handle streamline lesion access, recanalization, and dilation in complex CTO procedures.

Retainer rings and lumen bumps keep the annular valve from shifting proximally, preserving side-port sealing during catheter infusion.

A nested needle guard and independent septum sealing reduce blood exposure and accidental needle sticks in an IV catheter assembly.

A variable-flexibility sheath with an atraumatic tip and coupling device improves large-bore vessel access, alignment, and deairing.

A movable safety clip and elastomeric seal enable smooth catheter hub release while containing the needle tip to reduce needle-stick risk.

Keyed sheath-hub features and tactile dilator alignment improve coupling stability and deployment accuracy for LAA occluders.

A split needle, separable dilator, and pleated housing keep catheter components enclosed to reduce pathogen exposure during placement.

A removable vision probe guides a 3 mm catheter, then swaps to a biopsy probe while sensor feedback holds distal tip position.

A sliding sheath drives H-shaped gripping arms to secure and enclose a catheter tip during subcutaneous tunneling, reducing damage and tip complexity.

Integrated tapered and helical dilation features widen the skin insertion site during catheter placement, reducing extra instruments and over-dilation.

A rigid fluid-infusing inner member breaks dense thrombi and directs fragments into the catheter while limiting unintended blood aspiration.

A reinforced terminal sheath section prevents kinking during catheter advancement while preserving near-infrared imaging transmission and tip positioning.

A nested auxiliary sheath holds the catheter inside an introducer sheath while flushing helps limit contamination, leakage, and trauma.

Combining hemostatic sealing with adjustable aspiration, this valve lets physicians stabilize a catheter and control flow with one hand.

A flexible sheath and disc handle separate navigation from deployment force, supporting precise positioning and recapture through tortuous anatomy.

Reciprocal movement between nested interventional devices during fluid flushing removes microbubbles from the lumen during priming.

This case shows how angularly offset cross-slits and a tapered hub surface maintain hemostasis across varying device sizes.

A reinforced elongate device uses materials with different magnetic susceptibilities to provide clear MRI visualization and alignment.

A guide extension catheter and dilator use releasable engagement features to improve tracking through tortuous vasculature.

This case combines tapered lead tips, stiffness transitions, bends, and dilators for precise implantation in tortuous, obstructed veins.

This case combines a polymer shaft with a non-ferrous tip and variable bevel to limit RF heating and dilator skiving.

Separate lumens, hemostasis valves, and a locking mechanism support simultaneous device delivery through one patient access site.

This case combines ultrasound imaging and abnormality detection to guide puncture away from thrombi, stenosis, and aneurysms.

Rotating support arms automatically release via hub movement, preventing inner needle deflection and simplifying blood vessel puncture operations.

Sliding protection sleeve shields fragile needle tips during insertion and retracts to expose the tip, preventing bending or breaking in subretinal injections.

A guidewire assembly enables precise deployment of an occluding device within a vessel.

A single-lumen catheter integrates a light guide to deliver and activate photo-polymerizable gel in target tissue.

Internal capsule irradiates cancer tissue directly, bypassing subcutaneous fat absorption barriers.

Retroperfusion catheters extend the stroke treatment window by delivering neuroprotective agents directly to the penumbral region.

A tethering device with a deployable anchor stabilizes guide sheaths during intracranial delivery.

Optimized side port geometry and internal protrusions direct probes through vascular access devices, reducing frictional resistance and insertion obstructions.

A folding inserter pivots to store the introducer needle within the base.

A curved transseptal needle angles its end surface away from sheath walls, addressing shavings caused by close tip positioning during delivery.

Echogenic catheter stripes improve ultrasound detection reliability in difficult venous access without increasing thrombosis risk.

A one-handed catheter introducer uses a rotating wheel to advance the guide wire and catheter through the needle hub.

A safety catheter assembly uses a passive release feature to secure the needle tip after insertion.

A catheter shaft joins proximal and distal segments using a projecting portion penetrating a penetrating portion for secure connection.

Slidable sleeve diverts stomach reflux away from operator mouth during equine nasogastric intubation.