Medical Devices TRIZ Cases

Gravity-fed IV delivery uses flow sensing and regulator feedback to offset liquid-level changes and occlusions.

Two spring members automate needle insertion and retraction while a transverse control element sequences release in a compact medication device.

A longitudinal outflow hose keeps pump intake and discharge ports on opposite sides of a heart valve despite shifts, without extending the intake cannula.

Separated fluid pathways help sustain negative pressure while limiting leaks and blockages that interrupt tissue-site therapy.

Offset, angled inlet and outlet paths plus powder-collecting troughs help protect inhaler powder from leakage during rotation.

A balanced isopropyl alcohol-fragrance formulation in an infused pad masks antiseptic odor while preserving effective disinfection and user comfort.

A liquid supply portion moistens the support surface as a medical sheet slides to the treatment site, reducing drying and breakage.

Automatic authentication using biometrics, passwords, or RFID helps block unauthorized vaping while preserving easy use for approved users.

Silica, alumina, and lithium oxide in the modification layer improve thermal matching, helping ceramic heaters resist thermal shock and microcracks.

A centered liquid channel balances e-liquid supply to the longitudinal atomizer core and reduces thickness without sacrificing infiltration.

A sliding plug closes the connector when infusion pressure rises, helping protect veins while preserving flushing efficacy.

Separate scented-media vessels and electromechanical valves enable precise gas release while limiting leakage and cross-contamination.

A movable connection means separates pump and injection actuation, using the full piston stroke to reduce power consumption in transdermal drug delivery.

A spring-loaded needle valve divides the inhaler flow path into gaps that support fine, uniform aerosol ejection and reduce oral wetting.

Age verification switches the device from inoperable to operable, then restores lockout after a variable time or usage period.

A guide curve and mating guide cam convert rotation into axial motion, helping the cannula enter the skin perpendicularly.

Specialized compartments organize APD components while heating dialysis fluid and reducing setup effort and sanitation risks.

A copolyester blend resists aggressive chemicals, preserves molded-article integrity, and supports thinner walls in vapor delivery devices.

When CGM readings become unreliable, the pump switches to a stored open-loop basal profile while tracking insulin on board for safer therapy.

A swivelable, foldable chamber and one-way valve address pMDI inhalation timing issues while supporting compact aerosol delivery.

Segmenting phase opposition from clamping conflicts keeps at least one pad pair clamped during rapid translation and rotation of a flexible medical element.

Peroxide- and oxygen-based electrodes cross-check glucose readings to shorten stabilization and enable real-time diagnostics without finger sticks.

Two pumps separately deliver air and liquid to a nozzle, creating inhalable aerosol while avoiding combustion by-products.

A rounded distal hub and flared lumen distribute bending stress, ease gripping, and help prevent catheter kinking during use.

Pressure and flow sensing flags muscle-contraction spikes so staff can adjust insufflation before body-cavity pressure drops.

Integrating chlorine dioxide into catheter gels, coatings, or wetting fluids helps reduce germs while preserving easy insertion.

Movable prongs stay flush during connection, then block reattachment after disconnection to protect fluid flow and reduce infection risk.

A drive-shaft encoder determines blood bag tray position, reducing manual calibration and errors from mechanical or electromagnetic disturbances.

A fixed reservoir, angled nozzle, and storage chamber support precise aerosol delivery to a horse's nostril.

Baseline compressibility data and a pressurization sequence help quantify and purge 0.1–20 mL of air from a medical-fluid injector reservoir.

A common-well cassette uses mechanical valve seats and peristaltic pumping to reduce sealing delays and acoustic noise in APD.

Axial engagement, rotation, and snap-arm feedback simplify sensor attachment with a stable, user-friendly transmitter connection.

A pinch clamp compresses flexible tubing without sealing it, slowing blood flow to preserve leukocyte removal across 24°C–30°C.

A layered dressing separates oxygen transfer from exudate absorption to improve delivery reliability in wound treatment.

A modular semi-disposable patch pump separates reusable pump hardware from a disposable reservoir to reduce waste and handling complexity.

A baffle plus tortuous passage disrupts airflow to improve fine particle fraction while limiting breathing resistance and drug hold-up.

An internal reflective surface redirects optical signals to detect IV drip-chamber levels despite discoloration, cloudiness, or condensation.

A detachable retention frame and adhesive patch let the insulin pump support direct-cannula or remote-tubing infusion while reducing dislodgement risk.

A bidirectional recirculation circuit equalizes pressure between piston sub-chambers, reducing pulsations and preserving suspension homogeneity during delivery.

Osmotic pressure moves the piston, while real-time sensing regulates a one-way valve for consistent implantable drug dosing.

A V-shaped guideway and biasing member limit tattoo needle-bundle wobble and rotation during high-speed reciprocation.

Photoconductive switching controls pulsed beam current to reach FLASH dose rates above 100 Gy/s without sustained high-power operation.

An end-emitting optical fiber and cap reflector redirect UV or blue light into medical-device lumens to kill bacteria without chemical agents.

A tapered cyclone chamber separates dry powder particles by size during inhalation, improving delivery uniformity without complex mechanical components.

An integrated annular cord reinforces the septum flange to prevent separation from an implantable access port during power injection.

A perforated serpentine tube spreads fluid through an absorbent container while a pump supports discreet, mobile collection.

Discontinuous activation channels conduct heat across the carrier while limiting liquid contact and residue buildup.

An angled jig aligns the piercing element during holder assembly, creating consistent capsule apertures for predictable dry powder delivery.

Debris-prone check valves can under-deliver secondary drugs; this buoyant valve uses fluid level to limit backflow into the primary IV line.

Radial raster orientations distribute proton-beam heat across the target, reducing degradation during neutron beam generation.