Medical Devices TRIZ Cases

Angled gas passages, an insulation chamber, and iris control improve catheter heating uniformity, cut waste heat, and handle multiple diameters.

A foldable mouthpiece cover with spring-assisted opening keeps the inhaler hygienic while preserving quick access and dose counting.

A mechanical counter and lock stop nebulizer rotation after a preset number of sprays, preventing unnoticed overuse of the bottle.

A distal color sensor identifies the installed syringe, enabling accurate sub-microliter dispensing while reducing user error.

An adjustable catheter angle improves vessel alignment to reduce kinking, occlusion, and tip adherence during blood draw and infusion.

An angled shoulder and collar guide the spray tip to the right depth and orientation for accurate nasal tissue targeting with less user error.

Optical sensing in a surgical waste manifold measures blood concentration and fluid volume in real time for faster, more accurate blood loss tracking.

Segmented inflatable chambers help negative-pressure wound therapy conform to irregular surfaces while maintaining safe, controlled pressure.

A cassette holder with bayonet locking moves solid-dose cassettes without direct handling, preserving sterility and reducing loading errors.

Reinforcing ribs and chimney guides stiffen the holder, limiting loaded deflection and keeping medical containers aligned for accurate filling.

A locking part and plunger let the IUS enter the cervical canal without inserting the tube, reducing pain and deployment risk.

A flexible heating region deforms against an unbonded wick to improve aerosol heat transfer while limiting residue buildup and overheating.

A dose wheel and movable dosing element open two medicament cavities together for repeatable dry powder mixing and inhalation delivery.

Negative pressure from sprayed refrigerant draws composition into a cooled spray, improving penetration without separate pumps or compressed air.

A manual suction cartridge with a collapsible tank and disposable drainage path helps prevent wound cross contamination and support faster healing.

Simultaneous dual-pump control enables accurate dialysis fluid exchange at different flow rates without costly high-precision sensors.

Expansion chambers and an air buffer smooth peristaltic dialysis flow, remove bubbles, and improve low-flow accuracy.

Continuous position sensing guides the eye wetting dispenser to the correct distance for consistent liquid delivery despite poor vision or dexterity.

A valve-equipped refill adapter isolates filling and airflow ports to prevent leakage and user exposure during aerosol precursor refilling.

A shape-memory brake drive fits inside a pre-filled cartridge to advance the plunger incrementally while keeping wearable drug delivery compact and precise.

Helical grooves in a deformable hemostatic valve body cut insertion force while preserving reliable sealing during catheter exchanges.

Small affinity particles capture antibodies and leukocytes, while a hydrophilic membrane retains the particles and keeps treated blood flowable and clean.

Combined 40 Hz auditory and visual stimulation induces gamma oscillations and microglial clustering to reduce amyloid load without drug toxicity.

Acoustic sensing captures click and vibration signals to detect dose dialing and dispensing without invasive sensor changes to the drug delivery device.

An angled rotating attachment improves gastrointestinal tissue insertion and drug absorption while reducing moving-part failure in oral delivery.

A non-contact pusher and pre-use switch test prevent false end-of-dose detection in liquid medicine administration sets.

A modular wound trainer uses pumped fluid, haptic response, and thermochromic overlays to simulate realistic treatment conditions and feedback.

A disposable cartridge with membrane pump and check valves separates wetted parts from the actuator to enable precise low-power infusion.

Tangential airflow spins a sealed dose reservoir to open and disperse powder efficiently while reducing contamination and mechanism complexity.

Heated filament arrays create controlled skin micropores, enabling safer and more consistent transdermal delivery of large-molecule drugs.

A longer constant-diameter flow path lowers shear stress and hemolysis risk during blood collection from peripheral IV catheters.

A movable holder, hook, and linear drive simplify chemical-liquid circuit handling while preventing reverse blood flow during refilling.

Multi-pin contact detection identifies cartridge type and applies the right heating profile to avoid mismatched heating and device damage.

A segmented membrane cartridge retains powder during handling, then releases a metered inhaled dose without bulky deagglomeration hardware.

A capillary groove in the atomization cavity absorbs aerosol substrate, cools the cavity wall through endothermic atomization, and reduces leakage.

A sensor-equipped IV hanger tracks bag weight to detect infusion flow deviations in real time, alert caregivers, and help prevent overdelivery.

A wedge-shaped connector support stabilizes the PIVC connector at the insertion angle to prevent rocking and tip displacement.

A bellows pump with one-way valves and motor feedback maintains target negative pressure, cuts energy use, and limits fluid ingress.

Loose inhaler containers advance by contact pressure in a guide wheel, enabling defined dosing, optional mixing, and simpler filling.

Segmented attachment elements let a safety cap hold and remove the medicament shield without tight alignment, simplifying assembly and handling.

Position and acceleration sensing release fill-level readings only when a medical fluid container is stable, reducing errors from tilt, motion, and compression.

Controlled air-volume purging clears instillation fluid from wound therapy conduits while maintaining stable negative pressure at the wound site.

A polymer waveguide and optical cladding deliver bright surgical-site lighting through suction while reducing interface heat and glare.

A movable piston meters powder into pressurized fluid to prevent clogging and deliver consistent hemostatic dosing to deep GI treatment sites.

Pressure profiling during priming detects residual liquid in injector administration lines, helping block unsafe reuse and contamination.

A closed valve flushes cooled dialysis fluid from the fresh lumen into the used lumen so low-volume PD patients receive body-temperature fill.

An L-shaped airflow path with a side-wall air inlet limits condensate buildup, protects electronics, and improves aerosol delivery.

Power-output and heater-resistance sensing between puffs lets the controller adjust heating profiles to avoid dry out and overheating.

Sequential visual objects and rule-based responses raise cognitive load to stimulate the hippocampus and improve memory and spatial perception.

A rotating collar scrubs VAD connectors while mixing colored fluids to confirm adequate disinfection time and technique.