Medical Devices TRIZ Cases

Dynamic hinged body closes to compress elastic sleeve around catheter, preventing slippage during high-pressure infusion.

Wrapping the sensing component around the catheter circumference preserves maneuverability while enabling precise pressure monitoring.

Doppler velocimetry calculates cumulative shear stress and residence time to optimize LVAD pump speed, reducing hemolysis and thrombosis risks.

A medical liquid infusion device uses reciprocating piston motion and contact sensors to verify mechanical operation.

A porous dielectric film separates electrodes in an electroosmotic micropump to drive fluid flow.

A catheter housing integrates a displaceable collection component with a self-filling reservoir to capture blood samples directly through the cannula.

Semi-permeable membrane mixes gastrointestinal fluid with dry powder medicine to form a pasty dispersion for accurate metering.

Audifying EEG data enables personalized music therapy that avoids damaging side-effects from invasive treatments.

A two-section nasogastric tube uses a combining member to connect detachable internal and external segments for precise length selection.

Porous bodies in metered dose valves prevent sedimentation and creaming, ensuring consistent aerosol delivery.

An asymmetric barrier inside the male connector blocks standard locking Luer fittings, preventing accidental fluid delivery to tracheal tube cuffs.

Segmented vibration transfer and absorption members isolate vibrators from the mask periphery, resolving structural stability versus comfort trade-offs.

A catheter loop uses a radially-constrictive sleeve to confine the contraction wire alongside the support member.

A vent cap with a hydrophobic membrane vents air while retaining liquid in the chamber.

Single-cycle electroforming maintains optimal wafer thickness while increasing aperture density, enabling standard drive controller compatibility.

A catheter port housing integrates a yarn guide channel between the sealing membrane and the fluid connection to secure fixation elements.

A vascular access port uses a compression member to distribute insertion forces and prevent vessel damage.

A dialyzer compressor supplies compressed air to a blood pressure cuff, integrating measurement into the treatment device.

A hearing system generates output signal modulation at Gamma wave frequencies to induce neural entrainment.

Loading board with optimized second through hole aperture ratio reduces invalid vibration and noise while increasing small-particle aerosol proportion.

A medical fluid pump uses its battery as a counterweight to position the center of gravity below the carrying handle.

A dry powder inhaler uses a sliding actuating element and locking clips to advance blister cavities for precise medicament delivery.

An intermediary support rod maintains catheter straightness inside the urinary bag body, preventing urine blockage caused by bag deformation under weight.

Bioelectrical impedance sensors detect minute ventilation changes to control IV pump flow rates automatically.

A cannula piercing tip with a rounded external shape and axially curved peripheral edge improves fluid dispensing accuracy.

Spring-biased retention structures resolve contradictions between needle insertion trauma and operational control in portable medical systems.

Segmenting the storage vial from the heating mechanism prevents liquid contamination and leakage while enabling easy maintenance.

An elastomeric fitment compensates for PVC stress relaxation to ensure reliable air-in-line detection.

A microporous ceramic coating on titanium nails prevents wear debris toxicity while enabling targeted, slow-release drug delivery.

Integrating a UV light source into reduced-pressure systems kills pathogens in wound fluids, eliminating biohazard disposal requirements.

A gearing mechanism transmits axial movement between a dose selector and piston rod.

Segmented indexing wheel rotation aligns blisters for piercing, reducing mechanical complexity in sequential dose delivery.

An electronic vaporiser uses an IMU to detect removal from its case, triggering automatic e-liquid delivery and heating without manual button operations.

A self-closing sealing element at the liquid storage cup bottom enables automated cigarette liquid injection after full component assembly.

High-gradient S-band cavities accelerate carbon ions to 450 MeV/u, enabling rapid energy switching that reduces treatment time compared to bulky cyclotrons.

Amorphous copolyester inner surfaces in medical fluid connectors eliminate plasticizer leaching risks for patient safety.

A rotationally asymmetric menstrual cup uses a curved central axis to improve ergonomic fit and positioning stability.

A curved guide directs an intravenous line along a specific path within a housing that secures to a patient, preventing subcutaneous damage from movement.

Offset visual and audio alarm signals by a predetermined time difference to resolve difficulty identifying alarm sources among multiple devices.

Sensors detect tracer compounds in medical fluids to adjust injection parameters, resolving operator fatigue and pressure consistency issues.

An automated drainage spigot guard employs internal swabs to disinfect spigot surfaces, resolving inconsistent manual cleaning practices that cause CAUTIs.

Segmenting the feeder and energizing chambers minimizes residual medication wastage while maintaining a constant supply for effective aerosol delivery.

A metabolic monitoring system correlates food intake and physical activity data with glucose, ketone, and lactate levels to calculate individualized metrics.

A read request mechanism triggers device operations without explicit write commands.

Segmented catheter with rigid proximal portion prevents trajectory deviation and backflow, ensuring accurate therapeutic agent placement.

Composite construction reduces MRI artifacts and clotting risks while maintaining self-sealing reliability.

Vent holes in the flange exhaust gas to prevent pressure buildup that blocks through-holes and reduces filtration efficiency.