Guide Needles TRIZ Cases

Segmented extension tubes dynamically adjust flow resistance to reduce shear stress and prevent hemolysis during high-pressure blood collection.

A blocking member prevents inadvertent retraction during shipping, ensuring the needle remains extended until the sheath is removed.

Segmented anchor deployment through a coaxial balloon catheter reduces surgical invasiveness while maintaining implantation reliability.

Biased arms confine the needle tip to prevent accidental exposure during withdrawal.

A curved catheter system uses rotational orientation indicators to guide precise medication delivery.

A catheter tapered portion conforms to an inner needle blade surface, reducing vessel wall damage risk during puncture.

A cylindrical coupling member aligns the catheter lumen axis with the insertion port for secure engagement.

A tubular sealing member sits between the valve element and operation member to block liquid passage while allowing air flow.

A stent delivery system uses a thermal insulation sleeve to protect the inner tubular member during electrode-based access site creation.

Longitudinal incision and trough-like depression in the protective sleeve simplify guide wire insertion while preventing coating damage.

An inverted catheter sleeve everts via balloon inflation to bypass obstructions while preventing vessel perforation.

A nested collection catheter extends beyond an intravenous conduit to extract blood samples directly from the vein.

Side flow apertures redirect fluid exit away from the longitudinal axis, preventing backflow along the catheter track and reducing therapeutic agent wastage.

A guidewire incorporates an intermediary obstruction portion that compresses during insertion to facilitate catheter placement.

A tapered nosecone expands the introducer sheath lumen to reduce friction and peak push forces, minimizing vessel damage risk.

A catheter hub assembly uses resilient projections to enable controlled longitudinal movement between proximal and distal components.

Curved buffer mechanism absorbs impact energy to eliminate collision noise while securely housing the needle tip.

A single-handed insertion device merges needle holding and guidewire advancement into one integrated instrument.

Segmenting the catheter into a stiff proximal section and compliant distal tip reduces wall thickness while enabling precise anatomy alignment.

Sequential pinch valves manage needle withdrawal and connector insertion, reducing needlestick injury risks.

An expandable sheath uses shape memory materials to temporarily increase diameter for device delivery and contract upon removal.

A telescoping catheter delivery system guides instruments into the left ventricle through a transseptal puncture.

A medical sheath integrates multiple electromagnetic sensors to determine precise three-dimensional location data.

Cyclic aliphatic polyamide tubular body balances thin wall thickness and kink resistance to prevent deformation during medical procedures.

A catheter assembly with an integrated guidewire and slider mechanism.

Dual transmission windows shift circumferentially to reveal blood absorption changes, resolving depth position visualization limits in vascular puncture.

Non-uniform taper geometry reduces insertion resistance while eliminating protective shrouds for slit septum access.

A surgical needle with a movable stylet extends a deformable tip to protect the femoral head during blind portal creation.

An abrasive distal tip on a balloon catheter penetrates calcified plaque, resolving high-grade stenosis crossing challenges without damaging the vessel wall.

Segmented stiffness zones in a coaxial guide catheter resist dislodging forces while protecting coronary artery walls from damage.

A rail anchor system stabilizes catheter access in the hepatic vein using inflatable balloons or hooks.

A fluid injection needle unit uses a detachable cover to house the needle body after insertion.

Multiple movable tubular bodies constrain drive shaft curvature to prevent sheath deformation and maintain rotational force transmission.

Segmented drill and guide wire assemblies anchor leads via magnetic attraction, preventing axial dislodgement during patient movement.

A pre-assembled dilator expands the sheath lumen after single trans-septal puncture, reducing procedure time and tissue damage.

A rigid spring clip needle guard uses a solid lubricant coating to shield the needle tip securely.

Elastically deflectable bolsters anchor a PEG tube to abdominal tissue, preventing damage from rigid fixation while maintaining secure positioning.

Hydrophobic filter seals blood within the viewing chamber during needle withdrawal, preventing leakage risks associated with manual disconnection.

An inflatable balloon seals the gap to stop body fluid leakage while a suction system manages accumulated liquid.

Dielectric sensing via fixed electrodes determines tissue parameters during puncture, eliminating fluoroscopy radiation exposure and procedure time.

Concentric tubes house catheters and guidewires, reducing assembly time during emergency stroke procedures.

An insulated cannula enables electrostimulation positioning while a tapered flexible sleeve reduces neural tissue damage risk.

Segmenting the welded wire away from the proximal pipe end prevents axis inclination and catheter breakage during stent delivery.

A catheter distal end portion uses harder or more slippery materials to minimize guide wire damage during delivery.

A pliable sheath segment with a tensile filament forms a cinching loop to encapsulate calculus pieces during endoscopic procedures.

A spring-driven plunger mechanism propels an intravascular catheter into a vessel once the needle pierces tissue.

Telescopic sleeve retraction reduces activation stroke distance while maintaining clear needle visibility for safer injection procedures.

A medical safety device uses active and passive retraction mechanisms to pull a needle and guidewire into a protective housing.

Intravascular catheters with inflatable balloons anchor in the pericardial space, resolving inconsistent drug washout and prolonged placement times.