Guide Needles TRIZ Cases

A movable conductive needle and outer electrode measure resistance changes to identify puncture depth and limit excessive penetration.

A dynamic sheath expands for catheter delivery while reducing radial artery friction and trauma.

A wheel-fed guidewire mechanism integrates with the syringe and needle, freeing one hand to maintain continuous ultrasound imaging.

A nested rigid inner tube and flexible outer support enable MRI-guided delivery and aspiration while limiting patient trauma.

A movable-fit introducer and dual-component toggle-suture closure address larger sheath punctures under vessel pressure.

Radio-opaque markers align the sheath and dilator while an internal deflector redirects guidewires into side vessels.

A resiliently closed cannula enables repeat dialysis access while reducing fistula damage, bleeding, and closure complexity.

A flexible advancement element and integrated aspiration path support single-operator access through tortuous neurovascular anatomy.

This cardiac pacing case uses insulated intercostal lead receptacles to improve placement precision and protect tissue during implantation.

An anchored push assembly between the liner and jacket supports flexible, low-profile catheter navigation through tortuous vessels.

A tapered sheath collapses the introducer’s distal extensions, easing catheter advancement while preserving a larger distal opening.

A braided atraumatic catheter end expands around a leadless pacemaker for controlled implantation and retrieval with less tissue damage.

A smooth elastomeric tube with enclosed longitudinal supports resists axial compression while preserving flexibility and radial expansion.

A balloon catheter creates a controlled shunt through the coronary sinus.

A mechanical transmission converts longitudinal input into rotary-thrusting motion to compress and release catheter functional elements.

Nested steerable catheters deliver pulsed microwave energy to hard-to-reach tissue while coolant channels limit overheating.

Rail-guided needles expand around the vessel to deliver therapeutic agents uniformly along lesion length.

A nested outer and inner tube guides a basket and crushing rod for stone removal under local anesthesia.

This case shows how localized nitinol reinforcement balances distal torque transmission with catheter flexibility during pump placement.

A locally expanding strain relief layer lowers delivery push forces while helping limit sheath damage and vessel trauma.

A torque-isolated steering mechanism rotates the blood pump precisely, reducing catheter kinking during intracardiac placement.

Distributed playback devices detect keywords locally, limiting cloud audio transmission while reducing response delays and false positives.

This case uses compression, friction, and selective securing to grip catheters while transferring torque during procedures.

A nested push assembly reinforces a flexible catheter for delivery through tortuous, calcified vessels.

A tapered, D-shaped push assembly telescopes within the catheter to support large-device delivery through tortuous vasculature.

Elastic snap-fit coupling reduces debris and inconsistent forces while supporting rotation of sheaths and dilators.

A curved or reduced-diameter sheath section creates controlled friction, enabling target-site retention while accommodating varying device sizes.

A dual-catheter aspiration assembly uses a distal valve, irrigation, and shear forces to reduce clogs during clot removal.

A thumbwheel advances the guidewire through the needle, while nested withdrawal protects against puncture and contamination.

A shuttle member transfers push force to the guide extension catheter, supporting two-stage deployment and reducing dislodgement risk.

A vascular frame anchors the catheter on opposite sides while routing fluid internally to reduce snagging, irritation, and dislodgement.

Independent balloon sectors adapt pessary pressure to left and right uterosacral ligaments while enabling intermittent relief.

This case shows how elastic valve flaps open with a Luer opener and self-close after removal to control blood exposure.

A sliding inner tube arcs around the sacral promontory, enabling suction and irrigation through one abdominal incision.

This case uses a side aperture and preloading to preserve a catheter’s distal shape and align it for sheath insertion.

A flexible distal sheath with radiopaque depth markers and retrograde shunting supports precise carotid access and emboli control.

This case uses a tissue stabilizer and expandable cutter to form a sized interatrial aperture without a stent or valve.

A preloaded RICC assembly adds hard-sheath support for faster, lower-trauma catheter insertion.

This catheter assembly combines sliding needle support with distributed liquid passages to stabilize puncture and maintain blood suction.

A stiffening frame around intersecting arms limits lateral displacement and keeps the hollow needle tip covered during handling.

A movable support member stabilizes the catheter during insertion, preventing warping and needle-point retraction.

A spring-tensioned dilator hub and step-catch interlock support sheath insertion while limiting vessel trauma and bleeding risks.

A longer guide wire creates a stable path, helping prevent needle and catheter deflection in meandering or branching vessels.

Learn how distal support limits needle bending and kinking, enabling touch-free catheter placement across patient sizes.

A torsion spring rotates a drive wheel and linear slide to insert and secure a cannula, addressing failure, pain, and apprehension.

A barrier-and-actuator reservoir primes the catheter in line, reducing contamination risk and maintaining a bubble-free fluid pathway.

This case combines needle insertion, guidewire advancement, and catheter deployment with a sliding housing and locking safety cap.

This case uses tissue-contacting catheter surfaces to place biologic grafts and form vessel anastomoses without open surgery.

This needle guard uses variable slot widths, HDPE rigidity, and a tactile latch to secure wings during needle withdrawal.

The spade clip, release notch, and washer simplify catheter needle protection and support safe needle retraction.