Medical Devices TRIZ Cases

A contact trigger release needle guard uses a biased device shield to automatically cover the needle after injection.

Impenetrable packaging part with adhesive retention stabilizes infusion set positioning, reducing contamination risks during insertion.

Spaced protrusions on a planar body route drainage tubing to prevent dependent loops, reducing urine trapping and infection risk.

Tangential bypass inlet generates cyclone vortex to deagglomerate drug particles, resolving inconsistent particle size distribution in dry powder inhalers.

A mechanical fluid delivery device uses a spring-driven piston to move liquid from a reservoir through a positioned needle.

A single pressure sensor at the tissue site detects leaks and blockages, reducing system complexity and weight compared to dual-sensor designs.

A tubular drug injection device uses a needle assembly and pneumatic port to deliver medication through the skin.

Pivoting the needle entrance straightens the internal fluid path, eliminating hemolysis from ninety-degree bends and enabling high flow rates for hemodialysis.

An elastic coupling element eliminates air gaps between the sensor and container wall to resolve measurement precision versus device complexity.

Replacing metal springs with a plastic restoring element eliminates corrosion and electronic interference while simplifying assembly.

Automated infusion system adjusts hypnotic and morphinomimetic concentrations using electrocortical activity signals.

Sliding window maximum operations reduce noise in capnography signals without introducing systematic errors common with low pass filters.

A rotating bearing plate provides selective access to dialysis components while maintaining solution stability through automated mixing sequences.

A portable valve assembly uses a deflectable diaphragm to control fluid flow between chamber cavities for ambulatory drainage.

Apical anchor stabilizes magnetically driven pump, eliminating shaft vibration and aortic valve trauma.

A vacuum port in a drainage container removes excess air to maintain pressure equilibrium and prevent bag inflation.

Fixing pins stabilize the catheter shaft in the mold cavity during high-pressure injection, preventing axial movement and reducing residual stress.

Segmented disposable fluid paths prevent cross-contamination in non-sterile environments while preserving reusable injector components.

A sterile cartridge separates and mixes two-phase bone cement using a frangible membrane for controlled release.

Electronic drive replaces mechanical cams with audio-controlled magnetic fields, eliminating the need for multiple specialized machines.

A slidable cover member on a tube joining device enables visual alignment verification, preventing distorted tube settings and reducing joining failures.

Ozone treatment sanitizes dialysis kits, eliminating microbial growth risks and reducing replacement frequency.

Segmenting the elastomeric valve from the plunger enables single-sided molding, resolving manufacturing complexity while maintaining seal integrity.

Integrating a vibrator into the cap assembly intensifies massaging effects, widening pores to improve active ingredient penetration and dirt removal.

A smart obturator assembly integrates a distal sensor to monitor blood conditions and transmit real-time signals via electronic circuitry.

A dual-impeller catheter pump creates a low-pressure region in the vena cava to draw blood away from renal veins.

Magnetic sensing elements detect external keys to align and open fluid pathways, preventing accidental injection during refill operations.

Segmented fluidic connectors resolve reliability complexity trade-offs by enabling real-time blockage detection through controlled air leak monitoring.

Retainers secure the flexible vessel in an expanded configuration to prevent collapse under vacuum pressure during hysteroscopic fluid collection.

A biomedical injection device uses a vacuum chamber and sliding cannula to position the apparatus securely against patient skin.

A hemodynamic pressure sensor uses a compliant tube to transmit fluid pressure changes to the transducer while maintaining continuous fluid communication.

Segmenting pull wires and using a threaded member resolves single-direction limitations, enabling active bidirectional sheath deflection for vascular access.

Sensor-based detection triggers automated medication delivery to mucous membranes, eliminating manual timing errors and improving dosage precision.

A single-use syringe plunger assembly uses a frangible releasable member to mechanically disable the device after injection.

Attachable ultrasonic detector transmits multi-frequency waves to identify tissue layers and blood vessels, preventing ineffective drug absorption.

Segmented barrel and neck design maintains sharp fraction delineation while minimizing contamination risks.

A fluid management system uses an intermediary pressure sensor to measure working space pressure directly at the cassette level.

Ground thick wires in the coil body maintain constant diameters and reduce sliding resistance.

An asymmetric cross-sectional deflection mechanism biases the steerable catheter tip section to deflect in one plane while resisting out-of-plane movement.

A stop surface and release detector identify the fill level of a flexible medicine reservoir.

A detachable monitoring device senses pump strokes and generates tactile feedback to track dosing history without visual displays.

A segmented counting and blocking assembly tracks actuations and restricts reservoir movement in inhalation devices.

An implantable dialysis device uses a semi-permeable membrane to filter waste while retaining essential proteins.

A specific orifice diameter generates a pressure differential across the fluid delivery line, eliminating false alarms from bouncing bubbles.

Printing a battery on a flexible carrier eliminates rigid compartments, enabling radiation sterilization without shielding for compact subcutaneous devices.

Dual frequency RFID tags store unique identifiers on medical containers, ensuring continuous traceability through packaging and sterilization barriers.

A movable optical sensor tracks bubbles in fluid conduits to calculate flow characteristics, resolving slow measurement times at low flow rates.

Mouthpiece insert with sealing lip increases flow resistance to slow inhalation speed, reducing aerosol impaction in the mouth and pharynx.

Helical flow paths on phase-change heat pipes maintain 37°C infusion fluids while eliminating complex circulating water systems.

Pressure sensor support mounts holding elements to isolate mechanical forces from the drive head housing structure.