Guide Needles TRIZ Cases

An elongated medical body uses a guide wire lumen sized larger than the shaft portion to accommodate thick 0.035 inch wires for easier catheter insertion.

A spring clip with flexible arms encloses the needle tip within a catheter adapter to prevent accidental exposure.

A catheter needle guard uses a spring-loaded hub to retract the sharp tip into a protective receptacle after insertion.

A nested vascular access device integrates a needle, dilator, and sheath for single-step insertion.

An elastic outer layer accommodates radial expansion while a low friction inner layer ensures smooth retraction, preventing vascular damage in curved vessels.

Segmenting the catheter assembly from a reusable gripper reduces waste volume and storage space while maintaining operator ease of use.

Segmented support cannulas fit within tapered catheters to prevent buckling during percutaneous placement.

A hinged clamp secures indwelling catheters using a linear ratchet mechanism that blocks syringe needles.

Removable stylet provides insertion rigidity then allows flexible anchoring to minimize therapeutic backflow during convection enhanced delivery.

Rotational mechanics replace manual pull-back to resolve control accuracy versus ease of operation trade-offs.

A balloon protector features a distal stop and peel-off tabs to maintain catheter integrity during handling.

An introducer device guides a conductive element into a catheter lumen for precise fluid sensing.

An echogenic multilayer catheter scatters soundwaves to detect positioning, replacing fluoroscopy to eliminate radiation exposure and reduce equipment costs.

A ribbed support member expands radially after insertion, reducing vessel wall trauma and insertion forces during percutaneous procedures.

Dynamic valve mechanism maintains vascular system closure to prevent air embolism while enabling low-friction catheter passage through a protruding hub.

Actuating a vent cap after priming releases trapped air and reduces system pressure, enabling clear blood flashback for reliable vein confirmation.

Telescoping lumen catheters prevent guidewire deflection into false lumens during chronic total occlusion treatment.

A vascular access system detects systemic pressure changes to verify device placement and patency status.

A vessel cannulation device uses a pressure sensor to automatically advance a guidewire upon detecting arterial pressure.

An everting catheter sleeve anchors near an obstruction to create a stable pathway for device access.

Segmented axial chambers in a coaxial catheter channel blood flow into distinct zones, providing two-stage visual confirmation of needle and catheter placement.

Segmented trays and pre-assembled modules reduce preparation time for stroke recanalization by eliminating manual equipment assembly.

Dynamic expandable sheath resolves ureteral stricture access contradictions by transitioning from small delivery profile to enlarged working channel.

Raised protective barriers segment drug coatings on medical balloons, preventing friction-induced loss and ensuring uniform delivery during sheath removal.

Segmented rotating element with lock prevents side tube tangling and kinking during vessel advancement.

A surgical instrument with a retractable needle sheath enables precise fluid delivery through controlled exposure and retraction.

Segmenting the assembly into a reusable introducer and disposable sheath reduces waste while maintaining sterility through physical separation of urine contact.

A medical introducer sheath uses a deformable elastomeric septum to isolate and connect multiple lumens for instrument passage.

A guide catheter with a distal stop member positions a balloon dilation device within the Eustachian tube to resolve chronic serous otitis media fluid buildup.

Pre-assembled vascular access device reduces procedural complexity and accidental needle stick risks through integrated holding bracket design.

An expandable sheath apparatus transitions from a collapsed profile to an enlarged lumen for instrument delivery.

Segmented elastic membrane protects needle guide interior from contamination, eliminating double sheath costs and procedure time.

A patient-specific needle guide body with a monolithic base defines a fixed insertion path.

Segmented hub, retaining member, and tubular member resolve unitary design defects to improve manufacturing yield and quality control.

A needle thoracostomy device uses a hinge mechanism to position the needle assembly for pleural cavity insertion.

A dual sheath system guides a fluid pump into a lumen while protecting the shaft catheter during insertion.

Expandable proximal and distal elements isolate embolic material to enable precise aspiration while preventing distal embolization.

A catheter access sheath features a dual channel structure that allows guide exit via peeling action.

A curved introducer extension reduces radiation exposure and bleeding risks by providing a stabilized pathway through tortuous vessels.

Segmented conductive sections in an introducer sheath enable electrical signal transmission to catheters, resolving isolation trade-offs.

Segmented delivery devices guide flexible suction catheters into airways, resolving manipulation difficulties that cause aspiration risks.

A biodegradable tubular prosthesis with pores receives therapeutic agents from an expanded drug-eluting balloon.

Antimicrobial coating on needle surfaces prevents pathogen adhesion, reducing infection risk from skin bacteria during vascular access.

Flexible vascular sheath with side access openings enables redirection to different target areas without second puncture.