Guide Needles TRIZ Cases

Force sensors detect tissue resistance changes as a pusher-probe advances, enabling precise epidural targeting without blind injection errors.

Nested steerable catheters with rotational locking maintain first catheter orientation while second catheter steers, resolving precision stability trade-offs.

Movable split-tip catheter segments switch configurations to prevent fibrin sheath occlusion and recirculation.

A slitter with a mechanical holding finger secures guide catheters during removal.

A thrombus-inducing coating on the catheter surface accelerates hemostasis upon removal, reducing patient physical burden and treatment time.

A manual venous catheter assembly uses a movable puncture needle fixing barrel to retract the needle into the catheter fixing barrel.

An e-PTFE catheter tip delaminates under strain to transition from stiff to soft, resolving the trade-off between delivery rigidity and tissue trauma.

A catheter puncture device integrates a safety housing and retractable needle assembly for streamlined clinical handling.

Integrating needle, guidewire, and hub components reduces procedural complexity and minimizes needle stick injuries during vascular access.

Radial prongs actuated by a cam mechanism secure catheters in the introducer hub without increasing device bulk.

A guide sheath apparatus incorporates a bifurcating stabilization wire to enhance support during endovascular procedures.

An angled atraumatic catheter tip navigates tortuous vasculature to reduce hemorrhagic complications during thrombectomy.

An integrated catheter hub valve mechanism opens via pressure differential to eliminate manual occlusion and reduce blood exposure risks.

A trapping dilator secures the distal tip of an expandable introducer sheath to enable radial profile reduction during insertion.

An introducer valve maintains hemostasis by using a piston-driven compliance chamber to inflate a sealing membrane around varying device sizes.

A removable flash chamber couples to a needle hub to collect and store blood samples directly from the introducer lumen.

A microcatheter guidewire port uses a movable valve member to permit rapid exchange access while maintaining fluid tightness when no guidewire is present.

An expandable introducer sheath uses a trapping dilator to secure the distal tip for controlled tensioning and profile reduction.

A deflectable sensing instrument uses a flexure control apparatus to bend the distal portion and orient the sensing element.

A resilient clip compartment covering blocks openings to prevent blood leakage and splash during needle withdrawal.

A catheter system featuring a tapered tip and balloon enables rapid advancement through blood vessels without fluoroscopic guidance.

Segmenting insertion stages with a pilot needle and dilating cannula reduces vessel wall trauma during large gauge access.

A catheter sheath uses a separable connector to allow extraction without guide wire interference, resolving operability trade-offs.

Biased needle guard arms reduce retraction friction, preventing accidental sticks.

A guide catheter features a preformed curved distal portion with a flattened transversal section for precise vessel navigation.

A vascular access housing retracts the needle hub via a translation feature to shield the sharp tip.

Concentric inner and outer tubes enable lateral articulation of the distal tip, preventing guiding catheter material carving and reducing emboli risk.

Interlocking wings on a central body secure the needle tip via a hook-and-loop fastener, preventing needle stick injuries during removal.

A splittable sheath integrates a valve element with a resilient plate to seal the inner cavity during medical article insertion.

An inflatable cuff enlarges kidney openings to guide nephroscope tubes, reducing flesh tearing and X-ray checks.

A safety cannula assembly uses a sliding body with integrated rotation blocking and stop surfaces to secure the needle tip during operation.

Segmented curved sections navigate tissue planes to compress varicose veins, preventing blood entry and reducing nerve injury during ablation.

A balloon everts a catheter sleeve distal portion to create a stable pathway, preventing vessel perforation during device advancement.

An indwelling needle assembly uses an asymmetric finger hold to guide smooth outer needle advancement along its axis.

Integrating multiple sensors into an IV catheter enables continuous patient vital monitoring while managing increased manufacturing complexity.

Segmented slotted shaft resolves the contradiction between flexibility and outer diameter by varying slot density along the catheter length.

Ultrasound and infrared sensors provide real-time imaging guidance for precise needle placement, reducing errors from variable tissue thickness.

A mapping probe assembly with a skived loop section expands radially to contact tissue walls.

An enlarged microcatheter distal section fills the ledge gap at vessel bifurcations to ensure smooth guide catheter tracking.

Notched introducer needle creates separate fluid pathways to facilitate pressure-driven blood flashback, resolving saline priming interference.

A catheter assembly uses a sliding chassis to retract and shield the needle after insertion.

Compliant seal members manage compressive forces during infusion, enabling controlled flashback while preventing fluid leakage from the septum interface.

An enlarged diameter portion engages a nested guard to invert it over the tip, preventing accidental sticks without adding complexity.

A tracheostomy insertion aid uses a positive-locking connection between a guide element and dilator to secure the shield during device assembly.

Non-conductive PEEK and fiberglass materials allow microwave radiation through the introducer, enabling precise percutaneous tumor treatment.

Radially enlarged dilator bump pre-stretches sheath tip during removal, preventing permanent expansion and tissue trauma at the transition point.

A liquid absorbing seal swells upon flushing fluid contact, reducing blood leakage and static friction during endovascular prosthesis introduction.

A catheter support structure elastically deforms to sandwich the medical tube, absorbing dimensional tolerances during assembly.

Flexible catheter shaft features a distal light emitting portion with length constrained to six times its outer diameter.

Emergency decompression relies on a blunt stylet ahead of a sharp cannula to address organ damage, tissue-core blockage, and limited air flow.