Guide Needles TRIZ Cases

A steerable endoluminal punch features an articulating distal tip controlled by concentric inner and outer tubes.

Segmented containment structures prevent flashback blood leakage through introducer needle notches, preserving vein entry visibility and system integrity.

Nested resilient arms inside a catheter hub cover the needle tip, reducing volume and preventing unintended release during use.

A protective barrel houses a displaceable needle hub secured by a spring clip, eliminating separate holding means to prevent accidental puncture.

Exterior fluid injection avoids thermal injury and restenosis risks while achieving complete sympathetic nerve denervation.

A bi-directional cannula uses a retractable tubular extension to provide antegrade and retrograde perfusion, eliminating obstruction during device withdrawal.

An expandable access sheath accommodates larger device diameters during insertion.

Segmented chambers with vent geometries compensate for compression forces, preventing blood exposure while maintaining placement verification.

Transparent sheath components allow direct visualization of blood flow to confirm vessel puncture while locking mechanisms prevent accidental needle sticks.

A catheter guide integrates a shield member and dual conduits to stabilize insertion.

A safety device housing tilts via a biasing member to misalign the needle tip upon withdrawal.

A multi-shell puncture system integrates a needle, cannula, and catheter tube into one assembly.

Segmented grip members constrain the safety member to resolve complexity and assembly efficiency trade-offs.

An asymmetric locking mechanism prevents collar rotation back to the starting position, eliminating needlestick injury risks from reused devices.

A segmented introducer system employs a collapsible sheath and tapered dilator to minimize vessel trauma while accommodating large-bore devices.

A steerable hook catheter extends a cutting mechanism to sever cardiac valve leaflets.

A rotating safety pad on an extension clip covers the needle tip automatically during insertion, eliminating manual activation steps.

Separate upper and lower support portions engage directly to prevent separation, resolving puncture precision issues.

Passive needle guard covers tip during connection to prevent accidental sticks.

A vascular access system uses a shuttle member to advance multiple parallel needles through skin tissue.

Dynamic spine transitions enable rapid access and effective clot removal while minimizing distal emboli generation during acute stroke intervention.

An introducer catheter rotates a hollow needle 180 degrees inside the target vessel to prevent double-wall puncture and reduce vascular complications.

A flower-shaped introducer sheath transitions from a collapsed profile to an expanded state when accommodating medical apparatus.

Segmenting the needle from the sheath prevents axial lead movement during removal, maintaining precise electrode positioning in complex implant arrangements.

An expandable introducer membrane transitions from a folded state to an expanded configuration for device delivery.

An elastic valve element shifts between open and closed states via fluid pressure deformation within a catheter housing.

A modular retractable needle catheter hub uses interchangeable activation hubs to support both manual and automatic retraction mechanisms.

A rigid needle guard uses a sharp folded-in portion to secure the remover member.

A needle guard clip secures the device during use.

Segmented sheath allows balloon inflation and guide wire accommodation while preventing contamination for safe reuse.

Segmented needle guards employ a harder stopping element to resist excessive force and prevent accidental dislodgement during medical procedures.

Tubing assembly positions a signal generator on a stylet to guide catheters accurately while eliminating X-ray radiation exposure.

An integrated heating feature ablates Eustachian tube tissue to resolve persistent patulousness.

Segmenting the introducer needle from the catheter adapter minimizes vein damage risk while maintaining ease of operation during insertion.

A nested overtube system guides a larger endoscope into a body lumen after removing the initial imaging setup.

A self-activating vent cap shifts to a venting position upon rotation.

Inverted septum design with preformed openings eliminates piercing complexity while preventing compression setting during storage.

An inflatable balloon secures the catheter tip at the nerve site, preventing displacement from patient movement and reducing anaesthetic leakage risks.

Segmented vascular dilators feature adjustable circumferential shoulders and internal recesses for sequential retraction.