Guide Needles TRIZ Cases

Disposable sheath replaces expensive radiopaque materials with fluoroscopic markers to lower production costs while maintaining visualization.

A safety IV catheter needle guard assembly uses a bushing and biasing member to obstruct the needle tip after use.

A medical needle safety shield uses overlapping blocking walls to fully enclose the distal end within a connection hub space.

A catheter introduction system uses a tapered mandrel to guide large-diameter devices through veins.

An integrated vascular access sheath combines the sheath and closure device into one assembly, eliminating separate tools and reducing procedural complexity.

Elastomeric valve opens based on pressure differential between proximal and distal spaces to prevent blood reflux.

A flexible barrier over an outlet opening pulses with arterial blood flow to visually confirm vessel entry during puncture.

A tubular insertion tool with separation margins guides balloon catheters through hemostatic valves while shielding drug coatings from direct contact.

An integrated hub merges the needle cannula and guidewire to enable single-handed insertion, reducing contamination risks during vasculature placement.

Segmenting the delivery system into a thin guide wire and pre-formed catheter resolves maneuverability constraints while preventing vessel wall sticking.

A catheter insertion device uses a radially expandable bleedback valve to seal around the shaft for smooth passage.

A sheath device uses a detachable tubular section and clamping element to enable precise length adjustment during catheter insertion.

Splitting the needle body along seams removes the device from the guide wire, enabling immediate catheter preloading and reducing procedure time.

A removable cannula uses a longitudinal slot to slide within a tubular sheath, enabling controlled movement during medical procedures.

Self-activating one-way blood control valves prevent proximal fluid leakage while retractable needles eliminate healthcare worker exposure.

Distal anchoring protrusions increase external diameter locally to stabilize catheter placement while minimizing vessel wall contact and preventing occlusion.

A flexible sleeve covers intracardiac pump cannula openings to create a secure seal during device insertion.

Transverse housing design eliminates precise axial alignment requirements, enabling one-handed fluid connection even when visibility is obscured.

Layered compression-resistance portions reduce guide sheath foreshortening and kinking during navigation through tight vascular bends.

A vascular access device uses a sliding locking mechanism and transparent sheath to align needle and dilator components.

A telescoping dilator uses non-cutting threads to expand tissue gradually.

Pre-formed curved deflection section guides tip direction before needle exit, reducing unintended steering and radiation exposure.

A hub and sheath assembly uses a movable seam to transition between tubular and open configurations.

Segmented handle design allows one-handed catheter positioning and tool manipulation, resolving the two-hand coordination bottleneck in endoscopic procedures.

Applying polytetrafluoroethylene coatings to the V-clip shield interface reduces withdrawal force and eliminates grating sensations during needle removal.

A guidewire assembly uses a radially expanding distal section to engage body surfaces and maintain precise positioning during medical procedures.

Elastic protruding member grips medical tubes while applying stored lubricant, eliminating separate application steps and reducing user workload.

A catheter rotation drive uses multiple finite shafts to rotate an output shaft continuously.

A neural injection system uses a hollow cannula with a rounded blunt distal end and releasably locked stylet for precise medicament delivery.

A catheter sheath with an indifferent electrode grounds direct current pulses to create a localized electrical field adjacent tissue.

Lateral removal of a needle protector from an infusion part avoids axial forces that separate the hub, eliminating exposure risks during insertion.

An illuminating guidewire transmits light through an integrated fiber to provide real-time visual feedback on device placement.

A non-metallic introducer sheath with a microwave-transparent window reduces shaft heating while enabling smaller probe diameters.

A catheter sheath device uses a moveable member to reposition lumens for distinct flushing and delivery states.

A steerable catheter delivers a heart valve implant through the vascular system to correct mitral regurgitation.

A catheter septum with a thin Parylene coating prevents stagnant fluid flow and reduces blood exposure risks.

An intermediary funnel guides objects to the valve center, preventing perforation and eliminating blood leakage without requiring skilled user interaction.

Segmenting the flashback chamber with a seal and air-permeable vents allows controlled blood return for placement confirmation while preventing exposure.

Color-coded introducer sheaths display inner and outer diameter dimensions, resolving recognition issues caused by reduced wall thickness.

Replacing dual septums with one integrated unit reduces manufacturing cost, while a spring-loaded cover prevents accidental needle sticks.

Radial barbs anchor the catheter in subdermal tissue to prevent dislodgment while maintaining opening placement in the dermis for consistent drug absorption.

Varying pitch patterns in the multifilar coil resolve the pushability-flexibility trade-off, enabling navigation of tortuous pathways without losing strength.

Segmenting the blood collection pathway into separate segments eliminates contamination with priming fluid and reduces needle exposure hazards.

Segmenting the sheath into separate lumens allows continuous fluid evacuation during ablation, eliminating catheter withdrawal.

A nested dual-lumen catheter provides backup support for guidewires during vascular navigation.

Trocar with perimeter inflections creates free space inside catheters for therapeutic fluid pre-filling.

Combines needle insertion, guidewire advancement, and catheter placement to reduce procedural steps and needle exposure risk.

Lateral elastic elements exert restoring force on opposing jaws to snap shut and secure the needle tip within the safety device.