Medical Devices TRIZ Cases

An insufflator determines residual gas volume using pressure and flow sensors to enable precise cavity evacuation.

An electronic control system replaces mechanical linkages in fluid injectors, allowing intuitive piston operation regardless of device orientation.

A manual delivery pump uses a plunger to push blenderized diet through an enteral feeding device.

Potassium-loaded ion-exchange resin stabilizes dialysate electrolyte levels by selectively removing potassium and organic waste without releasing sodium.

Curved edges on the holding plate reduce friction against packaging walls, preventing particle contamination of medical containers.

A segmented wound dressing uses discrete blocks to determine instillation fluid volume through block counting.

Electrolysis-driven Parylene C bellows expand to dispense fluid, resolving diaphragm reliability issues and power inefficiency in microfluidic drug delivery.

An infusion set adapter integrates proximity and connection sensors to detect device status, preventing medication delivery errors.

A liquid injector displays injection conditions as a graphical image with width and position mapping to time and rate.

Creased paperboard spacer prevents static charge attraction while enabling compact portability.

Compressed elastic member expands along a bent path to drive a plunger and insert an injection needle in a wearable pharmaceutical delivery device.

Enlarged primary flow channel distal opening limits fluid flow rate and prevents mixing of incompatible medical fluids.

Cap removal triggers the activation mechanism, powering the battery module and enabling data transmission without compromising the sterile barrier.

Rotating the atomizer relative to the power supply maintains indicator light visibility and port alignment.

Internal reservoir with refillable ports maintains therapeutic antibiotic levels in synovial fluid, eliminating uncontrolled elution from cement spacers.

Segmented aluminum foil flaps create venturi airflow patterns that lift closures and dispense dry powder from compact inhaler pockets.

A dialysis machine sets constant pump energy to control dialysate flow volume.

A wearable drug delivery system operates in normal and reserve modes to ensure continuous medication administration.

Segmented elliptical doorways isolate speaker vibrations from the main enclosure, eliminating rattling while supporting multi-user therapy.

Sensor-controlled ultrasonic liquid jet prevents dry firing and overheating by detecting supply status before atomization.

A subcutaneous infusion set features a rotatable septum cap and blunt cannula for discreet wearability.

Air displacement boluses displace residual fluid in drainage tubes to eliminate manual manipulation risks like pressure spikes and reflux.

Automated controller applies geometric models to user inputs for precise fluid delivery, resolving measurement precision versus device complexity.

Rotor cam elements displace the stator against a sensor contact element, enabling detection circuit monitoring of axial position for occlusion identification.

Variable force springs compress a collapsible container to deliver controlled medicinal fluid flow, preventing medication errors during uninterrupted infusion.

Composite surgical adjuncts use activator-triggered medicant release to prevent staple line leaks and reduce inflammation.

A dry powder inhaler uses a movable dividing wall to separate blister compartments and arcuate surfaces to support coiled strips.

Dynamic rotation speed compensates for tissue deformation to correct asymmetric deflection errors during insertion.

A wound therapy controller regulates nitric oxide delivery and negative pressure application to a dressing.

Nested sealing mechanisms in this NPWT canister connection system resolve the trade-off between compact footprint and reliable fluid engagement.

A cardiac pump feed line uses a contoured inner surface to guide fluid flow into the unit.

A blood pump balloon inflates to augment flow and deflates to a planar shape.

Movable sensor carriage detects plunger position and volume without manual manipulation, resolving measurement inaccuracies caused by misalignment.

A portable sprayer uses a thumb-press trigger to dispense disinfectant liquid from an internal chamber.

Elastomeric tubing tension retains the feeding set on the pump panel, preventing accidental disconnection during daily changes.

A flexible plasma applicator uses fibrous layers to generate dielectric barrier discharge for rapid surface sanitization.

An automated apparatus extracts blood components and uniformly mixes them with additive solutions in satellite bags.

A control module adjusts voltage duty cycles based on position feedback to reduce power consumption in stepper motors.

A reusable ejection head structure attaches to multiple fluid reservoir bodies in vapor generating devices.

Dual optical sensors measure light transmission differences across the fluid path to quantify air volume and prevent patient harm from inadvertent injection.

A sensor insertion device uses a holding mechanism to maintain the upper case in a pushed-down position after attachment.

Controller switches between low sensing and high insufflating gas flow rates to prevent waste while maintaining required distention pressure.

An indicator agent within the drainage tube dissolves after fluid exposure, preventing contamination by triggering timely replacement.

Radiopaque shielding segments protect gastric band tubing from misplaced needle punctures while maintaining tube flexibility.

A perforated hydrophobic film layer directs airflow while blocking liquid exudate in wound therapy assemblies.

Asymmetric spray jets generate rotational torque from back pressure, eliminating external power sources and reducing thrombolytic agent requirements.

An automated drive system moves a stopper to fill the reservoir, reducing manual intervention and filling time.

A subcutaneous vascular port uses a movable lock with an inward force yoke to secure the catheter.

Alternating drug and biodegradable polymer layers enable precise in-vivo concentration maintenance without complex mechanical structures.