Medical Devices TRIZ Cases

A refill container uses a valve to isolate filling and airflow ports, limiting precursor leakage during aerosol device refilling.

An indexed roller ball maps the skin surface while dispensing formula and coordinating light treatment for more uniform care.

A hemostasis valve nested entirely in the sheath handle seals its lumen to block air entry and blood leakage during steerable procedures.

A steel plate returns and holds the solenoid magnet when unpowered, preventing unintended discharge while reducing power consumption.

Fresh treatment fluid passes through a sterilizing membrane while used fluid bypasses it, preserving purity and limiting filter clogging.

A fixed riser pipe with a moving hollow cylinder reduces flow resistance for rapid, reproducible aerosol delivery from viscous liquids.

An annular cryostat uses distinct material zones to reduce radiation beam scatter while combining MRI with compact therapy.

Port formation, guidewire-lumen insertion, and thermal bonding create a rapid-exchange interface that improves catheter control and manufacturability.

Automated transport, heating, and exchangeable tooling shape tube ends precisely while keeping the inner diameter open.

An integrated filter and absorbent in a fat-graft syringe separate viable cells from aspirate while limiting handling, contamination, and mechanical trauma.

A translating inner lumen redirects guidewires through side openings while the outer tube preserves flexibility and structural integrity in complex vascular navigation.

Flexible arms and ribs help remove an autoinjector needle shield reliably, replacing costly stainless steel parts with disposable plastic.

Variable-frequency ultrasonic vibration atomizes liquid without direct heat, helping control vapor density while avoiding coil overheating.

A modular external-catheter path diverts urine away from skin and uses quick-disconnect tubing for sanitary bag replacement.

A sliding piston changes dosing-chamber volume to fill and dispense fluid, avoiding priming actuations, fluid loss, and added assembly complexity.

A disposable cartridge and reusable pump automate cannula insertion and reservoir filling, reducing insulin device size and user setup effort.

A tapered throat and resilient seals limit air-bubble entrapment above the vibrating aperture plate, supporting consistent aerosol generation.

Uneven current loops create hot spots; through-hole resistance tuning spreads heat across the vaporizer sleeve.

Monitoring the atomizing sheet’s heating rate identifies dry heating in real time without liquid-contact sensors, protecting vaporizer performance.

Outgoing dialysate transfers heat to incoming permeate through a separate exchanger, improving configuration flexibility and maintenance for dialysis systems.

Turbulent flow in a disposable dialysis cassette improves in-line dialysate heating while limiting cassette size and temperature variation.

Linear feeding, a tool core, and heated forming tools automate precise hose-end shaping for cleanroom production.

Unequal nostril dosing complicates self-administration; a mechanical stop pauses two-stage nasal delivery for a controlled dose switch.

An endoscope advances supply and depot conduits to form a submucosal pocket, improving local bioavailability while limiting systemic exposure.

Separated distal and rear tube sections vary rigidity at the catheter tip, improving flexibility for navigation through curved blood vessels.

A boost converter and controller reduce pump power and target pressure as the power source depletes, extending NPWT operation.

Because the macula lies beneath delicate retinal tissue, a flexible cannula and oblique needle route therapy through the choroid to a localized subretinal target.

Radiopaque indicia molded into an implantable venous access port appear on X-rays, revealing power-injection capability after implantation.

Drop, pressure, and fluid-level sensing reveals gradual drip changes, partial occlusions, backflow, and empty reservoirs so pump operation can adjust.

Air bubbles can stagnate at the aperture plate and disrupt aerosol output; textured hydrophilic sealing and downstream piezo actuation support steady flow.

A pressure sensor and programmable controller regulate a bellows pump to maintain target negative pressure and support wound-fluid removal.

An aerosol component uses one heater to vaporize wick-fed liquid and heat a channel-held material element for tobacco-derived flavor modification.

Conical geometry and multiple sealing rings reduce plunger tilt and pushing force while preserving syringe seal tightness.

Separate nicotine and acid components until heating to extend shelf life and limit caustic damage in aerosol devices.

Sensor feedback detects leaks and blockages during wound therapy, helping maintain negative pressure and instillation delivery while reducing waste.

Pre-pressurizing the second fluid before phase transition helps the injector reach its target ratio faster and avoid concentrated or diluted doses.

The cam mechanism ejects a syringe and pierces the package seal with one hand, helping reduce opening delays, contamination, and needle-injury risk.

Negative pressure collapses a flexible catheter section to improve penile sealing, reduce leakage, and limit tissue irritation during use.

A built-in reservoir, pump, conduits, and one-way valve automate catheter flushing to limit occlusions and reduce manual hub access.

Proximal suction openings keep tissue from blocking flow while bipolar wires coagulate tissue in delicate nasal and sinus surgery.

Micro-flow measurement between a cassette membrane and vacuum reservoir reveals leaks before treatment, helping prevent interruptions and machine damage.

Alternating driving portions push wheel teeth to stabilize screw-and-piston delivery, while an intermediate needle position helps exhaust air.

Targeted radiosurgery uses radiosensitizers, radioprotectants, and focused ultrasound to modulate neurons while limiting injury to critical brain structures.

A collapsible sleeve contains lubricity-enhancing liquid around a hydrophilic catheter, reducing spillage during storage and insertion.

Capacitance or induction sensing gives real-time needle alignment alerts, helping access smaller ports while reducing mis-sticks.

Irregular flexible lines raise compression resistance, helping gastric residence systems avoid premature passage through the pylorus.

A single cranial access point supports fluid injection and discharge while reducing puncture burden, occlusion risk, and infection exposure.

A derivatizing agent detects debris and microorganisms in the waste stream, giving objective feedback on cavity flushing.

A spiral spring and U-shaped rail package the needle mechanism compactly while supporting rapid, painless insertion and retraction.

Removable end coupling seals mouthpieces during storage, prevents accidental activation, and supports interchangeable flavor and nicotine consumables.