Guide Needles TRIZ Cases

Segmenting the hemostasis seal into slitted and thickened zones resolves the sealing versus removal force trade-off in catheter hubs.

Invaginating tube connects to a runner on the catheter, enabling radial compression during retraction and preventing buckling via annular pressurization.

A multiple entry single lumen dilator sheath assembly supports large medical devices through a distal multi-hole configuration.

Rotatable grasping arms stabilize targeted leaflet tissue against a cutting arm to enable precise incision while protecting surrounding posterior structures.

A balloon catheter features a collection portion to entrap stagnated secretions while a dilation portion widens the stenosed site.

A medical needle movement restricting portion maintains the needle tip within the case using a sloped inner face.

An optical fiber inside the cannula provides continuous visual feedback on position, preventing vessel injury from delayed detection.

A movable cuff assembly slides along a catheter shaft to enable precise post-insertion positioning.

A valve mechanism uses side holes in an operation member to fill flow path dead spaces with infusion liquid.

A guidewire insertion tool with a tapered passageway guides the wire into proper alignment for medical procedures.

Multiple hollow needles penetrate skin to aspirate blood and confirm placement, eliminating reliance on ultrasound guidance systems.

An introducer integrates a Doppler flow sensor into the guide shaft for real-time blood flow detection during vascular access.

Serially movable push tags enable one-handed catheterization, resolving the two-hand constraint for ultrasound-guided insertion.

A septum housing secures a tapered sealing component within an intravenous catheter adapter to guide medical instruments through the fluid pathway.

A catheter adapter features a septum with two slits to accommodate an introducer needle and a winged needle set for blood withdrawal.

A winged needle protection body uses a movable tongue to widen the exit opening, allowing cap passage while keeping the inner chamber sealed.

Locking surfaces engage to restrict relative movement, suppressing catheter shrinkage and maintaining inner needle protrusion.

A temperature-responsive lubricating coating layer transitions from hydrophilic to hydrophobic characteristics at body temperature.

A shapeable guide catheter uses a malleable shaping member to plastically deform and hold a desired curvature.

An inverted conical tip contracts within a tracheostomy tube to eliminate abrupt tissue transitions during insertion.

A valve bypass tool with a locking tab secures to an access introducer during biostimulator transport.

An operation regulation portion constrains pressing actions on the movement mechanism, preventing erroneous operation that compromises safety during use.

Segmented inner needles resolve outer needle collapse by combining a thin tip with a thick proximal section to ensure stability.

Actuator advances catheter through closed system seal to enable blood aspiration while reducing patient pain and contamination risks.

An inner member slides within an outer cannula to change the distal tip orientation, enabling controlled puncture enlargement in the atrial septum.

A pre-loaded wire guide inside an access needle enables efficient placement and removal during minimally invasive procedures.

An integrated infusion device automates catheter insertion and needle retraction via push-button or rotary activation mechanisms.

An expandable percutaneous sheath uses a scored jacket to enlarge its lumen after insertion, reducing procedural steps and tissue trauma during nephrostomy.

Expandable support elements form a stable cage to reshape body lumens, preventing tissue collapse that hinders instrument maneuverability.

Segmented catheters prevent backflow while maintaining perfusion, reducing non-target embolization risks during balloon inflation.

Circumferential LED array bathes percutaneous insertion sites in therapeutic light to prevent pathogen infiltration.

A catheter distal tip with a stepped surface engages the introducer needle to prevent buckling and proximal movement, reducing insertion force.

A turnbuckle assembly shifts a cap to compress an exoskeleton within a medical device handle.

A flexible spring clip compresses a catheter tube to close the fluid passageway, preventing blood spillage without complex valve construction.

A dynamic introducer sheath distributes mechanical stress across the vessel wall, reducing trauma risks during catheter deployment and retrieval.

Stabilization wires anchor a sheath in small airways, enabling repeated nodule access without visual navigation.

Integrated catheter merges pre-dilation and drug delivery, reducing pressure requirements and improving material compatibility.

A hemostatic band secures a sheath tube to the patient's limb using a winding belt and hook-and-loop fastener.

A catheter insertion device integrates a needle cannula, guidewire, and release mechanism into one handle assembly for single-handed operation.

A handheld device uses a Doppler sensor to locate the femoral artery and guide automated sheath insertion.

A retractable centesis needle uses dual springs to bias an inner cannula for initial tissue contact sensitivity.

Segmented mortise and tenon connectors enable axial bending of the distal tube section, allowing deeper renal access to flush out stone fragments.

A hemodialysis catheter sleeve uses a movable structure to extend the device into vasculature through a distal valve.

An endoscope balloon employs an adhering portion on its inner surface to secure the shaft, preventing displacement and simplifying dilation procedures.

A needle with a curved distal tip geometry guides insertion through tissue.

A needle shield assembly uses a spring-biased ball to block the catheter introducer needle lumen.