Guide Needles TRIZ Cases

An elastic barrier layer with a normally closed slit opens during insertion to prevent blood leakage and infection risk in catheter assemblies.

A spring-loaded cover automatically retracts to shield a Huber needle upon extraction, enabling single-operator handling.

A composite catheter needle uses a light-permeable plastic shaft to enable visible primary flashback detection.

Segmented dilator shaft transitions from rigid proximal to flexible distal sections.

A tunneling sheath encloses an active agent coated balloon to protect the therapeutic layer during insertion.

A dynamic microvalve prevents reflux during systole, ensuring high drug concentration at the tumor site.

Alternating stiff and elastic wall portions allow temporary expansion for catheter passage while minimizing vessel trauma.

An integrated locking portion in a tubular body anchors a drainage stent and locks a guidewire, resolving positioning instability during biliary procedures.

Nested vascular access system bypasses tortuous arterial pathways to stabilize device delivery.

A rapidly insertable central catheter assembly uses a retractable needle device to advance the tube through vasculature.

An injection-molded needle tip guard uses integrated elastic jaws to snap shut over the needle.

A bifurcated catheter with a stabilization lumen anchors guide wires to prevent arterial wall trauma and cerebral embolism.

Magnetic indexing replaces mechanical locks on flexible catheters, maintaining tip alignment despite path length changes from bending.

A bump on the introducer needle contacts a septum assembly to provide tactile feedback during catheter insertion.

An expandable introducer sheath uses an inner shape-memory layer and outer elastomeric barrier to accommodate large profile devices.

Segmented mesh structures trap diverse particle sizes while nested delivery simplifies deployment.

A radially flaring abutment member creates a protective barrier between the catheter and myocardial tissue during intra myocardial injections.

A magnetic field detector tracks catheter tip position inside the patient body to enable rapid vascular access deployment.

A steerable guide uses a nitinol wire and spring mechanism to curve a needle within a rigid shaft.

A medical insertion head uses a pivot handle to move the device between protective and insertion positions.

A cannulation device uses a movable puncture needle nested within a protective cannula to enable safe access.

A catheter system uses a removable outer sheath to store an expandable medical device.

A catheter system uses a flashback chamber and hydrophobic membrane to facilitate direct blood collection.

A flushable catheter assembly uses a septum activator to selectively open fluid pathways within the adapter.

Visible depth indicators on the needle, guidewire, and cannula enable precise transcarotid access while reducing operator radiation exposure.

A medical coupling with an eccentric recess and thin wall segment enables smooth delivery of vascular devices.

A vascular access device needle features a fenestration and inner member to form a blood flash channel for immediate visual confirmation of vessel puncture.

A vascular catheter with a stylet creates subcutaneous tunnels for arteriovenous grafts.

A percutaneous ureteral catheter uses a protective surface area to shield drainage holes from tissue contact.

Elastic bellows allow a floating hemostasis valve seal to move orthogonally, preventing leaks caused by off-axis forces during catheter retraction.

A containing catheter with a stiff distal member guides inner tools through body conduits.

A compliant membrane with a separable outer covering expands radially to reduce vessel wall injury during percutaneous procedures.

A Huber needle assembly uses a sliding lower body catch to lock the needle tip during extraction.

A catheter retainer system uses recessed pushers and ribbed holders to engage stent junctions and cell openings during deployment.

Segmented guide tube lumens route displaced fluid away from the brain, preventing air bubbles that disrupt therapeutic agent distribution.

A non-invasive sheath securement device uses retention channels to hold the sidearm without obstructing fluid passage.

A slitting tool tail portion stabilizes an indwelling medical device during sheath removal.

A crimped cannula with a hook-shaped interlock secures the needle hub to prevent fluid leakage.

A positioning mechanism advances through vascular access to anchor leads within the internal thoracic vein for stable electrical contact.

A medical guide device maintains a constant needle insertion angle through a tilted guide hole and sliding member.

A movable sheath directs flush solution to the distal end of an imaging catheter, displacing blood from the optical path while reducing contrast media volume.

Pivoting lid with aperture captures access needle assembly inside holder body, preventing accidental needle sticks during blood collection.

An integrated catheter assembly merges introducer needle and extension components into a single unit for rapid vascular access.

A cannula positioning guide constrains delivery tube placement to ensure precise therapeutic agent deposition.

A septum with an offset slit transitions to a collapsed state under pressure to maintain sealing integrity.

An expandable introducer sheath transitions from a compressed profile to an expanded diameter during device delivery, then recoils to its original size.

Top-mounted finger pads advance the guidewire and catheter sequentially without manual repositioning, reducing procedural complexity during vascular access.

A brace constrains an extension tube into a curved shape, preventing kinks that block fluid flow and cause catheter dislodgment.

A needle tip protector assembly secures the sharp end of an intravenous catheter using a movable locking mechanism.

A splittable catheter sheath uses a tab with a serpentine outer edge to enable manual splitting.