Guide Needles TRIZ Cases

A tissue cutting device modifies fibrous septa through a single entry site using an integrated hook and blade mechanism.

Segmented grooves on the catheter plug accommodate varying blood pressures, ensuring reliable flashback visualization during placement.

An adjustable catheter restricts venous return to enhance diuretic efficiency, addressing inadequate fluid removal in refractory heart failure.

A steering engagement catheter uses a deformable skirt to retract the atrial wall and create pericardial space.

A needle retracts into a sleeve via a slider mechanism to maintain structural integrity during insertion.

Annealing polycarbonate-urethane copolymer tubes at 248°F prevents kinking during bending, maintaining fluid flow in vascular sheaths.

A vascular catheter system deploys a preformed guide tube and stylet actuator to pierce vessel walls at remote entry points.

A catheter hub cover enables reduced-touch insertion by providing a dedicated gripping interface that isolates the user from the device.

Port valve flexible tube covers side port openings to prevent fluid leakage through catheter adapters.

A reusable catheter design enables easy mounting and separation of a micro biopsy tool for single-invasion tissue sampling.

A catheter insertion device uses a biasing element to retract the needle and guide wire into the housing.

A flexible catheter with a pre-shaped tip and movable inner tube enables variable curvature for precise medical fluid delivery.

A sinus access sheath features distal cutting grooves to create a passageway for therapeutic instruments.

A manual neuropilot device guides surgical probes into the brain using pre-calculated angles from MRI data.

A dilator covering layer constrains a spiral protruding portion on the outer peripheral surface of a hollow shaft.

Orientation detection triggers a locking mechanism to prevent needle protrusion when held incorrectly, reducing needle stick injury risk.

A tubular insertion element uses a sheath with circumferential segments of different elasticity to reversibly expand its diameter for implant passage.

A thermoformed inserter tube uses folded reduced thickness regions to transition between expanded and collapsed diameter configurations.

Merging an endoscope into the dilation catheter eliminates separate device coordination, enabling single-handed balloon inflation control.

Laminated structure with braided support layer prevents kinking under pushing forces.

A conical diffuser tip reduces infusant exit velocity to lower recoil force during catheter insertion.

Segmenting the housing into two frames allows easy one-handed separation while a guidewire prevents kinking in extended dwell catheters.

An expandable impeller housing resolves the contradiction between small insertion size and large operational volume, enabling full cardiac flow rates.

A ureteral access sheath integrates a force meter and disengagement mechanism to measure insertion pressure.

An adjustable shroud accommodates varying guide catheter diameters, eliminating the need for multiple size-specific tools while maintaining secure positioning.

Segmented tapered dilator tips maintain consistent axial dilation force to prevent left atrial perforation and tissue damage.

A vascular graft system integrates a hemostatic valve and clamp to enable controlled device insertion.

A valved catheter assembly uses a dynamic flap valve to enable selective fluid flow through the hub.

Axially-directed oscillatory motion reduces insertion force and tissue deformation during vascular access.

Segmented hinged sections close around tools to prevent gas leakage and preserve pressure integrity.

A catheter assembly uses a removable guide wire and attachable guide member to enable selective insertion assistance.

Segmented introducer with locking hub minimizes vessel trauma and reduces procedure time during prosthetic device delivery.

Helical expandable member enables device retrieval after stenosis treatment, resolving permanent implant trade-offs.

Color-coded introducer sheaths display inner and outer diameter indices to resolve wall thickness recognition trade-offs.

A safety needle assembly features a slidable grip mechanism that moves the needle holder to cover the sharp distal tip.

A transanal catheter uses a dumbbell balloon to anchor securely in the rectum without protruding.

A cannula insertion device uses a sliding hub to shield the needle during operation.

Sliding inner and outer branch segments expand a receiving opening to secure a catheter, enabling precise bending within the confined left atrium space.

Nested catheters and seals in this stent graft delivery device reduce blood flow obstruction while enabling accurate placement through tortuous lumens.

Medicated covers cushion the catheter-urethral interface to reduce tissue abrasion and infection risks while maintaining urine flow.

A rotatable catheter hub part repositions the extension tube coupling to accommodate left or right-handed users.

A medical overtube device uses independent wire and pulley mechanisms to fix the shape of nested unit groups.

A catheter assembly uses a movable deflection suppressing member to stabilize the inner needle during insertion.

An obtuse angle between the grip plate and needle axis accommodates varied clinician grasping techniques while maintaining flashback chamber visibility.

Perfusion openings in the distal shaft maintain blood flow while providing structural stability to prevent guide catheter dislodgment.

Infrared detector and projector system visualizes needle position relative to vasculature, reducing cannulation attempts and patient anxiety.

A stoma dilator system uses segmented telescoping tubes with radial bars to enable sequential dilation and easy grasping of each component.

Radially expanding sheath shields deflated balloon, preventing vessel plaque disruption and emboli formation.

A valved catheter uses a solid stylet to maintain fluid pathways, preventing brain tissue from entering the tip and clogging the device.