Wound Drains TRIZ Cases

Barbed proximal anchors and a distal pigtail help keep an intrauterine shunt positioned while stiffer tubing resists kinking and occlusion.

A conduit, valve, pressure sensor, electrodes, and optical emitter combine CSF pressure control with continuous brain-activity monitoring for ambulatory care.

Flexible drainage members let users pinch or bend a urinary catheter outlet to control flow and prevent leaks and splattering.

Existing reusable catheters can face contamination and coating deterioration; disinfecting hydration fluid supports safer, lower-waste reuse.

A magnetic rotor enables finite-increment shunt pressure adjustment while a control device verifies settings without X-rays.

A closed-loop CSF circuit varies pump and drug flow rates to localize therapy and limit excess CSF drug volume.

Controlled CSF circulation and separate drug infusion rates help localize therapeutic material to cortical or subcortical brain targets.

Positive air pressure creates a vortex that clears retained urine from drainage tubing, improving measurement accuracy and reducing bladder pressure.

A dynamic occlusion mechanism switches the stent between open and closed states for controlled, periodic, or intermittent drainage.

Segmented stabilizing sections collapse under negative pressure to draw wound edges together while removing fluids and limiting filler compression.

A dedicated suture lumen keeps the drainage path clear while enabling catheter-tip anchoring and stylet insertion and removal.

Complex conduits and electronic valves can cause NPWT leaks; segmented chambers and a passive one-way valve stabilize wound pressure.

A knitted or braided monofilament tube inside an impermeable sheath supports flexible drainage while limiting kinking and fiber shedding.

Staged sheath constraints release flanges before the intermediate portion, replacing cumbersome suturing with controlled expansion for endoscopic anastomosis.

A compressible contact layer uses 2–6 mm and 8–15 mm orifices to balance tissue engagement and fluid management in negative-pressure therapy.

Perforated manifold layers let negative pressure contract an incisional dressing across its width while preserving flexibility and fluid flow.

A catheter coupler links old and replacement catheters, enabling exchange in place while maintaining drainage and reducing tissue trauma.

A pre-curved, variable-stiffness outer sheath improves shunt placement while supporting stable anchoring and natural blood flow.

Integrated electrodes, pressure sensing, and a drainage conduit support simultaneous neurological monitoring and responsive CSF treatment.

This case separates the wound interface from the vacuum pump to simplify negative pressure therapy and support home mobility.

Pressure sensors trigger pumps to redirect lymph into the venous system, reducing congestion without external thoracic duct drainage.

Channels in the collapsible sleeve circulate sterilization fluid, supporting reusable catheter storage and sterilization between uses.

Fill multiple fluid containers at once with elastic fasteners that seal them automatically.