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.