Guide Needles TRIZ Cases

A probe-driven activator attachment opens the blood control valve for sampling and guide wire insertion without septum damage.

A catheter wire deflects on tissue contact and uses fluoroscopy to verify shunt arm positioning before release.

This vascular puncture needle uses a localized bulb-shaped expansion to improve echographic tracking and provide a mechanical stop.

This case shows how a mitral repair delivery catheter separates anchor and suture translation paths to preserve spacing and orientation.

This case shows how nested non-circular members and elastomeric friction secure a catheter while indicators simplify clamping confirmation.

A catheter delivers bioabsorbable foam while vacuum removes residual cyst fluid, reducing size and recurrence potential.

This case shows how a compressed NITINOL sheath expands into a larger lumen, accommodating instruments while limiting ureteral trauma.

A sliding syringe barrel creates vacuum through a shorter fluid path, reducing blood volume and clotting risk during vascular access.

A detection unit triggers backflow inhibition when blood flow exceeds a threshold, reducing patient burden during puncture.

Segmented rigidity, snap-fit dilator attachment, and a sliding cover simplify insertion and provide adjustable negative pressure suction.

A repositioning sleeve preserves vascular access while a heart pump remains in place.

A moving ultrasound probe tracks needle position against vessel walls, supporting accurate puncture-state recognition and control.

A coated, expandable frame accommodates large devices while contracting for stable access and less bleeding during prolonged use.

This IV catheter case uses a pre-positioned safety clip to capture the needle tip and reduce stick risk during catheter release.

An integrated fluorescent coating and fiber optic waveguide provide real-time biomarker feedback during surgical needle placement.

Raised portions and channels restrict hub-to-housing motion, improving rigidity and manufacturing ease for small-gauge catheter assemblies.

A semi-annular cannula lets air escape while blood remains visible, enabling rapid introducer needle placement confirmation.

A relay connector positions the support tube proximal to its communication port, improving priming flow and pullback reliability.

This case uses separate locking and hemostasis seals to stabilize sheath position while preserving controlled catheter sliding.

This catheter valve uses side holes in its opening member to improve fluid flow, limit retention, and reduce bacterial growth.

A compressible outer housing biases inner arms closed, locking the retracted cannula tip inside for safer withdrawal and disposal.

A pre-locked dilator and sheath uses bridged valve halves to prevent disengagement, limit contamination, and simplify catheter removal.

A flexible cylinder and locking rings constrict the aperture to limit blood leakage when devices turn sharply in vasculature.

A small RF electrode delivers cutting energy while the larger insulated distal portion limits advancement into non-target tissue.

A slit inner tube, meltable outer jacket, and adjustable seal help capture large clots while preserving cannula flexibility.

A catheter insertion tool uses a valve stop and biased guide-tube valve to prevent hemostatic damage and fluid backflow.

A movable sleeve positions an inflatable balloon for precise sinus dilation, improving drainage while limiting tissue trauma.

This case uses a rotating footplate and dual wire paths to stabilize femoral access while easing exchanges and reducing radiation exposure.

A segmented insertion tool protects the hemostatic valve and seals the guide tube during catheter insertion and retraction.

Axially slotted, reduced-tip loading tools lower seal force during passage, preserving drug coating adherence and seal recovery.

A transparent needle hub and vented flashback pathway sharpen blood visualization during intravenous catheter placement.

Arcuate clot engagement members capture emboli for less invasive removal.

This case combines transcervical access, aspiration, and passive flow reversal for controlled clot removal during stroke treatment.

This case uses an inflatable balloon to create an adjustable working channel with fewer dilators during kidney access.

Negative pressure stabilizes fibrosed septal tissue, enabling controlled puncture while reducing opposite-wall perforation risk.

Nested catheters, aspiration, and passive flow reversal support rapid intracranial clot removal while limiting distal emboli.

This case uses mechanical interlocking, anti-rotation ribs, wings, passive release, and venting to simplify catheter assembly.

An RLC circuit converts needle movement through a lumen into voltage signals for precise, real-time longitudinal position guidance.

A needle-tip shielding mechanism uses a movable inner housing to trap the needle tip and selectively engage an interlock system.

A medical device holding assembly secures an embolization coil sheath within a compact housing for single-handed handling.

A catheter extension housing incorporates a probe mechanism to facilitate needle-free blood sampling, eliminating additional punctures.

Ribbed stiffening elements within a tubular sheath expand the interspace to reduce tissue irritation during food transit.

Venous access enables antegrade hemodynamic support, bypassing arterial complications while maintaining coaxial blood flow.

Stabilizer immobilizes the injection needle during subretinal delivery to prevent retinal tearing from manual handling errors.

Integrated catheter system uses segmented extension tubing and needle hub to reduce blood leakage during insertion.

A catheter-mounted sponge extends beyond a flexible lumen to absorb wound fluid and retracts into the device for removal.

A thin-walled tubular channel made of hard plastic material prevents accordion folding and blood leakage risk during intravascular introduction.

Extension tube bridges the gap between physician hands and fluoroscopic field, reducing direct radiation exposure during wire guide manipulation.

Angled lateral conduits and elastomeric covers direct retrograde fluid flow through a vascular catheter to prevent blood stasis.

Textured cannula stabilizer anchors muscle tissue while obturator protrusion prevents displacement during thoracic access.