Guide Needles TRIZ Cases

Segmented anchors with varying widths hold tissue to prevent leakage while reducing surgical complexity during minimally invasive implantation.

A soft tissue biopsy device uses a modified syringe to actuate a beak assembly for precise coring.

A protective sheath encloses implantable medical electrical leads to prevent bacterial contamination during insertion.

Two overlapping C-shaped shaft elements detach to expose a probe, solving incomplete splitting risks and sharp edge injuries in urology.

Segmented dilators combine proximal stiffness with distal flexibility to advance carotid sheaths, preventing guidewire displacement during vascular access.

A venous catheter sealer uses a coaxial guide passage to direct an occluding wire into the lumen for reliable sealing.

A puncture wire shielded in a sheath advances through a ureteroscope to place the tip into a selected calyx under direct vision.

Coaxially embedded anchor rings distribute tensile forces to eliminate stress concentration and prevent fractures in thin-wall medical tubes.

Segmentation and preliminary action principles stabilize the catheter interface, reducing time loss caused by patient movement in emergency settings.

Thumb-operated slider retracts a protective sheath over the needle tip for precise transversus abdominis plane block injection.

A guide extension catheter with a retractable wire stabilizes positioning within coronary arteries.

A catheter deploys an evertable balloon to contact the inner surface of the Fallopian tube.

A deflectable injection needle pivots relative to a flexible elongate member via a clevis mechanism.

Flexible nitinol loops rotate 360 degrees to fragment clots, resolving the trade-off between effective debris removal and vessel wall trauma.

A rapidly insertable central catheter integrates a suture wing and hub to streamline insertion procedures.

Longitudinal reinforcing members in the thin wall portion decrease push force and increase consistency during device insertion.

A needle introducer system couples a flared head guide to a beveled cannula body, maintaining a stable injection portal in soft tissue.

An electronic control unit measures electrical potential within a created field to determine interior electrode position.

Alignment marks and segmented retaining members resolve the trade-off between ease of operation and device complexity in medical therapy systems.

A segmented indwelling assembly prevents long needle deflection during puncture, allowing secure blood vessel positioning.

A medical safety needle uses a resilient cantilever to press a collar radially inward, securing the detent portion over the needlepoint.

Segmented pawl geometry and spring bias prevent premature separation, resolving the reliability versus complexity trade-off.

Piezoelectric sensors detect shaft deflection while the drip chamber seals to prevent air embolism during electrophysiology procedures.

A pre-curved guide sheath maintains its shape within a specialized overtube lumen, reducing friction and instability during tissue treatment.

A vascular access device integrates a local reception coil element to receive magnetic resonance signals at the insertion site.

A tapered dilator bridges a small needle and large catheter, while a proximal port enables rapid blood flashback detection to reduce procedural delays.

A flexible push tab deflects under dressing pressure to prevent punctures while enabling one-handed IV catheter configuration.

A vascular introducer sheath incorporates a recoil section with higher radial compressibility to facilitate tissue recovery at the puncture site.

Segmented internal construct flow grooves control blood velocity to prevent uncontrolled bleeding during vascular access.

A semi-tubular device guide directs intravascular tools through catheters with reduced resistance.

A catheter tip uses a wavelength conversion member to transform near-infrared light into visible light for direct visual observation.

Multiple sheath side holes maintain pressure control when liquid blocks distal openings.

A biased distal portion positions within the anterior chamber angle to deploy intraocular shunts without optical apparatus.

A tube extension catheter shifts between elongated and shortened configurations to enable precise percutaneous heart valve deployment.

A one-handed indwelling needle assembly uses an elastic body to automatically extend a protective sleeve over the sharp tip.

A catheter uses a mesh sleeve and serrated grasping fingers to capture embolic material.

A suture delivery device dilates an arteriotomy puncture and places sutures across the vessel access site to achieve hemostatic closure.

Conformal flexible sheath eliminates gaps between round catheter and skin to prevent contamination while allowing non-longitudinal movement.

Axial slits in the tubular member allow the loading tool to shift configurations, protecting pharmacological coatings from compromise during handling.

A trap balloon catheter features a slidable retainer mechanism that adjusts the working length of the catheter shaft to prevent balloon extension beyond the guide catheter distal end.

Segmented tubular member with longitudinal slots and helical coil joints balances bending flexibility with torsional stiffness in medical guidewires.

An inflatable balloon catheter occludes portal vein branches to enable precise embolic material delivery and reduce blood loss.

An expandable balloon within a trocar device applies compressive pressure to minimize bleeding at the penetration site while reducing insertion force.

Wings enclose the needle tip and fasten via hook-and-loop material, resolving the contradiction between reliable protection and ease of use.

Automated non-return valves prevent air intrusion during pleural puncture, eliminating manual switching complexity.

A catheter system with a guidewire advancement device and needle safety mechanism.

Nested needle guard with angled retaining arm prevents accidental clinician pricking while minimizing structural complexity.