Guide Needles TRIZ Cases

A wound coil, sleeve, and loop wire limit elongation and radial expansion to stabilize implant deployment through complex vascular anatomy.

An asymmetric flange and sheath-hub opening inhibit rotation and axial disengagement to maintain alignment during heart access.

A metallic reinforcement layer between resin layers helps prevent kinking while preserving contrast visibility for distant lesion delivery.

Multiple devices can pass through a straight-loading sheath hub while elastomeric seals limit blood leakage and preserve hemostasis.

A pre-closed barrier with slit-forming leaflets opens for male-luer insertion, then closes rapidly to limit blood loss, leakage, and infection risk.

An integrated handle lock engages the actuation member to prevent unintended sheath movement and maintain stent positioning during deployment.

A compound needle, dilator, and flexible cannula separate puncture from access maintenance to reduce dialysis infiltration risk.

Limited flexibility and stability hinder catheter navigation; a variable-density composite sheath enables precise multi-directional alignment.

A distal spacer keeps the puncture component off the catheter lumen wall, helping the needle pass bends without jamming.

Continuous distal and side slits help a catheter valve self-open under drug pressure while closing against blood backflow.

A nested outer-and-inner catheter path helps overcome severe right-atrial angles for precise tricuspid valve fixation-device deployment.

External fluoroscopy can limit thrombectomy success and expose patients and operators to radiation; a fiberoptic angioscope provides direct, real-time vessel viewing.

A bifurcated hub routes an Impella device and PCI catheter through one access site while dedicated valves maintain hemostasis.

Graduated catheter indicators show insertion position and movement, supporting early dislodgement detection without complex electronics.

A plug expands the sheath during withdrawal, avoiding multiple progressive dilators while simplifying delivery apparatus access through the vessel.

During cardiac arrest, an expandable catheter blocks downstream flow and infuses oxygenated blood retrograde to target the heart and brain.

Imaging-guided delivery targets specific cardiac ganglia with regenerative or ablative therapies for localized neuropathy treatment.

External ridges and a flexible body accommodate movement at tubing joints, reducing fatigue cracks where infusion tubing meets connectors.

The malleable sheath changes from oval to circular for blood-pump insertion while preserving space for additional devices through one access point.

A tapered catheter junction with protrusions or helices dilates the skin insertion site during insertion, reducing extra tools and over-dilation.

Ribbed flow channels and an internal conduit limit fluid stagnation while a valve controls blood leakage during catheter placement.