Guide Needles TRIZ Cases

Nested dilation delivery system uses pivoting flaps to create a tract, reducing blood loss during heart wall cannula installation.

Nested inner shaft compresses outer distal end, reducing tissue damage and kinking during vessel navigation.

Valve manifold enables selective fluid switching to reduce manual intervention and air embolism risk.

An integrated sliding guard secures the needle in a hub recess, eliminating complex assembly steps and reducing injury risk.

Retainer mechanism enables passive disconnection of the hub from the needle shield, preventing interference with hemostatic valves and seals.

A catheter assembly uses a distal flexible portion with stable flexibility to prevent vessel wall damage during insertion.

A dilator with movable lateral portions transitions between closed and open configurations via sheath movement.

A radially expandable introducer sheath uses a circumferentially discontinuous inner layer that shifts relative to an outer layer during diameter changes.

A modular hemostatic valve uses segmented semi-cylindrical shells connected by living hinges to create a secure fluid seal.

A spring-powered retractable needle mechanism shields the sharp distal point within a hollow handle grip portion after catheter insertion.

A resilient plastic engaging element expands to lock onto a catheter hub, providing secure needle tip shielding without metal debris.

A safety needle uses a spring-loaded blunt stylet to shield internal organs during minimally invasive body cavity access.

Selective antimicrobial coating on noncritical catheter surfaces prevents pathogenic colonization while preserving critical dimensional tolerances.

A vascular access device uses a pre-installed septum to seal the catheter lumen after needle withdrawal.

A venous cannula uses a puncture needle with a solid distal tip and hollow proximal section to enable blood aspiration.

A unified insertion tool integrates needle, guidewire, and catheter advancement assemblies into a single housing for controlled medical procedures.

Magnetic catheters attract each other to align blood vessels, eliminating surgical dissection and reducing tissue damage during fistula formation.

A slidable septum isolates blood and priming solution pathways, resolving flashback clarity and material softening trade-offs.

A trapping catheter stopper abuts a guide catheter to fix insertion depth and secure the guidewire position during exchange.

Movable valve housing creates a friction-free pathway for catheter insertion, resolving vascular access challenges caused by high frictional forces.

Distributed orifices and vibration overcome inflammatory barriers to improve insulin absorption reliability.

A concentric catheter assembly uses a flexible inner layer to dampen vibrations, reducing backflow and tissue disruption during neurosurgical infusion.

A steerable catheter uses a sliding subassembly to position an implant near a cardiac valve annulus.

A medical device featuring a hollow supporting element and manually actuated selector for catheter application.

A nonuniform axial-stiffness ureteral access sheath varies stiffness along its length to enhance pushability and minimize tissue trauma.

Sliding needle guard covers tip upon withdrawal to reduce friction and drag force, resolving the trade-off between safety and device complexity.

Segmented retaining arms with tension elements prevent premature guard release, ensuring reliable needle tip protection in fluid-filled environments.

Segmented expandable sheath assembly lifts distal sheath via sliding proximal sheath, reducing insertion trauma and calcification dislodgment risks.