Medical Devices TRIZ Cases

An intermittent urinary catheter assembly incorporates an extendable urine discharge sleeve to direct fluid flow from the device.

Color-changing CO2 sensing stylets verify pleural space entry, reducing human error and improving pneumothorax treatment reliability.

An optical detection system replaces magnets to verify feeding set alignment, preventing inaccurate fluid delivery and false alarms.

Segmented false air inlets rebalance internal aerodynamics and de-agglomeration efficiency to improve lower lung deposition profiles.

An adjustable arm device immobilizes moving subcutaneous ports to prevent accidental needle sticks during medical access.

A transabdominal tube and pump extract ingested food from the upper digestive system to reduce caloric intake.

Hybrid metal-plastic gear construction minimizes transmission error in lightweight insulin pumps, ensuring accurate drug delivery.

Segmented plunger head assembly reduces device complexity while maintaining precise fluidic media delivery in portable infusion systems.

A pressure-sensitive syringe pump mounts to an ultrasound probe for single-operator anesthesia delivery.

Pre-positioned sealing elements resolve the contradiction between ease of operation and sealing reliability in compact rotatable magazine inhalers.

Rotational sensor locking resolves device complexity trade-offs by eliminating decoupling mechanisms for reliable dose logging.

An optical element array detects droplets using overlapping light regions.

A shape memory alloy driving mechanism uses a magnetic latch to hold the drive member at precise positions.

A wound interface device uses spacers to define a therapy space for fluid instillation and removal.

An analgesic border adhesive reduces pain during dressing changes by targeting periwound skin while a drug-blocking layer prevents contact with the wound bed.

A two-piece powder inhaler uses an air swirling structure to transport and disperse medication.

Conical geometry limits insertion depth to prevent nasal cavity damage while disposable design eliminates contamination risk.

A medicine sprayer pivots a movable section to conceal the capsule puncture needle within the body structure.

Segmenting flow into withdrawal and return phases with dedicated pumps eliminates clamps, reducing noise and extracorporeal volume during CHF therapy.

A medical fluid cassette uses a pre-biased elastomeric member to apply outward force on a membrane for chamber volume expansion.

A customized sleep management system classifies sleep steps and detects disorders using multi-modal bio-signals.

An open furrow in the catheter channel allows inflexible oxygen sensors to exit parallel to the axis, preventing blockages and patient discomfort.

A pressure-activated emergency supply valve reroutes drug infusion through a subcutaneous bypass using a movable piston and needle.

Segmenting the power supply into a stationary docking station resolves the contradiction between device mobility and battery complexity.

A porous membrane catheter dispenses fluid medication uniformly across the infusion section surface area.

Selective application of antimicrobial coatings on the septum and actuator surfaces prevents pathogenic colonization while maintaining device compatibility.

Video cameras analyze pupil dynamics to measure anesthesia depth, resolving unreliable electrical monitoring limitations.

Heat shrink tubing nests a radiopaque band against a cannula wall, improving imaging visibility while maintaining a smooth surface free of sharp edges.

A wearable drug delivery device uses a closed-loop controller to adjust peristaltic pump parameters based on inlet and outlet pressure sensor data.

Tapered sleeve with porous layer anchors subcutaneously, resolving infection resistance versus catheter replacement difficulty.

A gear mechanism indexes a blister package inside an inhaler to deliver dry powder medicament.

Pre-sterilized connecting members with a piercing member and septum establish sterile fluid paths, eliminating operator swabbing and contamination risks.

Segmented adhesive bases and seal caps anchor tubes to skin, eliminating suture-related necrosis and infection risks.

Continuous optical irradiation through semi-permeable membranes reduces microbial load at catheter sites without disrupting sterile barriers.

An embedded heat conductor inside a quartz cup maintains controlled temperatures to prevent material burning and reduce harmful substance generation.

A multi-part spindle nut and control sensor block drive head infeed movement during syringe changes.

Resilient barrier with internal cavity creates interference fit to seal fluid pathways, preventing reflux and catheter occlusions.

A segmented connector device uses an air feeding port and filter to manage fluid flow in negative pressure wound therapy systems.

Controller monitors electrical characteristics to detect the aperture plate drying state and reduces actuator power.

A laminated PKU test card uses a flexible film barrier to contain blood samples within designated circular areas.

A coaxial counter structure with a knob, counting disc, and transmission gear tracks remaining doses in dry powder inhalers.

Rotating the motor housing relative to the grip adjusts needle depth, removing wire constraints that hinder visibility and precision.

Environmental sensors analyze sleep patterns to generate personalized recommendations, eliminating reliance on inaccurate self-reported data.

A delivery adapter uses a micro-tube to transport liquid embolic material directly from the syringe to the catheter hub.

A nasal aspirator attaches to the user's arm via a strap, freeing hands for head stabilization.

Sensors detect pet behavior deviations while beacons emit sensory stimuli to alleviate anxiety without harmful drug side effects.

Merging irrigation channels into the outer member wall eliminates external tubing, reducing instrument bulk and portal size.

A patch-sized fluid delivery system uses redundant controllers and shape-memory actuators for precise therapeutic dosing.