Medical Devices TRIZ Cases

Calibrated leak paths let a controller detect blockages across multiple wound dressings, improving flow monitoring and therapy reliability.

A two-part port expands under the skin to create a stable implant base, reducing tissue trauma and simplifying repeated vascular access.

Maintaining a constant pressure differential and sensing gas flow or concentration helps quantify suture leak size for surgical retesting.

A thermoformed web with raised openings spreads wound exudate laterally in NPWT dressings while lowering material and production cost.

Structured web elevations keep a vacuum wound therapy tube open under suction while preserving fluid flow and lowering material cost.

Control circuitry uses a valve, flow restrictor, and pressure sensing to detect leaks, low flow, and unsafe pressure before therapy.

A segmented O-ring sealing structure helps soft mist inhalers maintain 1-5 micron aerosol delivery, avoid repriming waste, and improve dose tracking.

A pressurized tubular stiffening structure raises catheter stiffness during insertion, then relaxes for vessel conformity to prevent blood pump kinking.

A variable-volume suction body with one-way valves and detachable parts helps nasal aspirators maintain suction and simplify cleaning.

A detachable hub inserts a CGM sensor and infusion catheter in one step, then removes the introducer needles while keeping the wearable pump compact.

Signal-quality tracking and placement guidance help infusion pumps and CGM devices maintain reliable medical data transmission.

Adhesive columns through peripheral mesh openings secure non-bondable membranes, enabling finer aerosol droplets and lower nebulizer production cost.

A pressed-fiber tampon uses a body-melting cannabinoid fat coating to absorb fluids while relieving menstrual cramps and spasms.

A hydrophobic membrane and one-way valves separate vented gas from collected liquid, enabling compact chest drainage for safe home mobility.

A dual-rigidity overhanging adhesion sheet stays planar after attachment removal, improving stable skin adhesion in compact drug delivery.

A strip-shaped tobacco tar guide reduces heat absorption at the atomizing surface, enabling quicker smoke release and steadier atomization.

A rotating collar scrubs female medical connectors and reveals a visual indicator, improving disinfection compliance and reducing CRBSI risk.

A flexible latch joint enables secure linear cartridge attachment without rotation, making non-circular e-cigarette connections easier to use.

A retractable UV-sterilized platform built into a dialysis machine keeps tubing and components aseptic in space-limited treatment setups.

Acoustic reflections in the airway are analyzed through a respiratory therapy interface to detect obstruction-related conditions before symptoms appear.

Ultra-short high-energy beam delivery enables FLASH treatment of large deep tumors while reducing healthy-tissue damage.

Surface-wicking microtextures and patterned resistance heating improve aerosol liquid distribution, reduce charring, and boost heating uniformity.

Dual orientation sensors align a nasal dispenser to the user's head for repeatable targeting of hard-to-reach nasal regions.

A new analyte sensor uses calibration data from the previous sensor to shorten startup and avoid gaps in monitoring.

Localized iontophoresis and controlled release improve ocular drug residence time and bioavailability while reducing systemic distribution loss.

Bridges ISO 80369-3 and non-ENFit enteral connectors with a dual-format coupling that maintains fluid flow while reducing misconnection risk.

Electromagnetic induction warms refrigerated medicament before injection, improving patient comfort while preserving cold-storage stability.

A pre-sterilized wound therapy pump uses pressure sensing, controller feedback, and a one-way valve to detect leaks and maintain sterile negative pressure.

Pressurized fluid deforms the drug reservoir to deliver pegfilgrastim with fewer mechanical parts, reducing size, power use, and dislodging risk.

A porous body with an embedded sheet heater simplifies atomizer assembly, improves fastening reliability, and reduces heat loss and dry burning.

A positive-pressure air-jet DPI and 3D rod array interface generate small aerosols for children while reducing exhalation risk and throat losses.

Guided needle paths and locked disposal compartments organize pen needles, prevent reuse, and reduce sticking and bending risks.

A nested inner-outer housing with a fluid seal reduces friction, buckling, and leakage during instrument delivery through vascular access devices.

Optical sensing and AI-guided fluid management track urine output without an indwelling catheter to adjust diuretic and hydration therapy.

Overmolding bonds a porous adhesive patch directly to infusion sets or patch pumps, removing a second adhesive layer and simplifying manufacture.

An angled bezel rim exposes the pod inlet to reduce airflow blockage while maintaining secure electrical contact and smart pod connectivity.

A loose-coupled inhaler housing records every dose through relative movement, improving compliance tracking without altering airflow.

Multiple antennas and control circuitry enable remote monitoring and automated wound therapy adjustments with less provider intervention.

Peristaltic positioning and metal attachment parts help stabilize low-permeable drugs and improve gastrointestinal wall absorption.

A friction-driven telescoping piston and plug pump cuts valve leakage, shrinks pump volume, and improves dose accuracy for wearable insulin delivery.

An elongate track and movable key transfer rotation to a flexible shaft while allowing axial adjustment and reducing strain in endoscopic instruments.

A snap-fit base connector and biasing member create a secure low-profile catheter connection that reduces snag hazards and patient pressure points.

Segmented smooth and ridged introducer surfaces give clear tactile and audible cues while reducing vibration during flow tube positioning.

Integrated antimicrobial reservoirs keep lock solution at minimum inhibitory concentration between catheter uses to suppress hub contamination.

Blown airflow mixes with the spray through a swirl chamber to accelerate droplets deeper into the nasal cavity with a reusable nozzle.

Intracranial and surface brain signals are fused to model sleep-stage transitions and adapt stimulation to avoid over- or under-stimulation.

Contactless pressure sensing through a membrane detects occlusions in wearable fluid delivery while keeping sensors outside the sterile fluid path.

A switchable flow blocking unit isolates body fluid backflow at the replaceable-common conduit boundary, extending common conduit use.

Micro-coring needles excise small amounts of subdermal fat through fine punctures, reducing tissue disruption, bleeding, and procedure time.

Segmented liquid feeding channels with offset inlet corners create bubble expansion space, improving wick supply and preventing dry burning.

A detachable atomizing assembly connects to a battery via a regulating ring and connector with stop pins.

An insufflator detects the pressure-volume inflection point to maintain optimal working volume.

Distinctive marks on disposable injection devices guide personalized site rotation plans, reducing lipohypertrophy and improving medication absorption.

A detachable housing holds an absorbent pad releasing scents, adding olfactory stimulation without increasing device complexity.

Uniform cylindrical aerosolisation chamber eliminates precursor accumulation zones, preventing leakage and ensuring consistent droplet sizes.

Aiming guides direct spray plumes to the olfactory epithelium, bypassing the blood-brain barrier for targeted central nervous system delivery.

A dry powder inhaler advances a flexible strip of sealed reservoirs using a spring-loaded receiving element to pull the carrier through the device.

External actuator aligns with implantable pump via magnetic attraction to dispense therapeutic compounds through the skin.

Resilient spacers create an air space around the feeding tube aperture, preventing skin necrosis by enhancing air circulation.

Multiple dispensing openings on a tapered applicator prevent leakage and contamination while enabling application in any orientation.

A medical waste fluid collection cart uses a ramped base interior to direct solids away from the drain opening.

A locking mechanism for an aerosol drug delivery device uses a screw-driven fastening member to engage a housing contact portion.

Varying cross-sectional areas in the aerosol carrier path redirect aerosol streams toward the discharge port, increasing discharge amount per unit time.

A test housing with input and output electrodes applies voltage to measure dispensed fluid volume via electrical conductivity.

Inverting reader placement below the drawer bottom resolves reading reliability issues caused by misaligned tags while maintaining storage space flexibility.

Protective element in drainage channel prevents vacuum source contamination while maintaining suction power.

A compact infusion pump uses a gas-filled bellows to drive medicants through a microchannel panel and reinforced catheter.

A drug delivery device uses a single attachment part to anchor into gastrointestinal tissue via an actuator mechanism.

Segmenting the electronic dose counter into a detachable module resolves bulkiness and cost issues by allowing reuse across different inhaler housings.

A cap covers a pressure compensation opening on an inhalation cartridge to seal the inner bag.

Mechanical pressing removes the fat phase from adipose tissue, avoiding enzymatic damage and simplifying stem cell isolation.

Dynamic signal analysis distinguishes stuck droplets from air by adjusting sensor thresholds, reducing false alarms and maintaining detection sensitivity.

A Joule vaporizer generates medication vapor triggered by active suction detection from a flow module.

A portable inhalation device connects directly to standard vials via a puncture mechanism for immediate atomization.

A reusable fluid dispenser uses a movable perforator member to access single-dose reservoirs.

A binding layer in the therapy bridge captures proteins and bacteria from high-viscosity exudate, preventing occlusions that cause pressure drops.

Secondary filter captures extruded clots during primary retrieval, preventing fragmentation.

Pressure sensors monitor wound dressing volume to stop fluid delivery at a set threshold, preventing overfilling and leakage during therapy.

A flow directional infusion device uses a filter valve to deliver embolic agents into an aneurysm.

Tangential airflow in the swirl chamber breaks down large powder agglomerates through wall collisions, improving lung uptake efficiency.

Segmented audio system fades masking sounds in specific bands to deliver effective sleep stimulation tones without external noise interference.

A bending die with a recess permits lateral insertion of medical instruments to form precise bends, resolving manual angle control issues.

Color-coded light indicators on a surgical smoke evacuator provide real-time vacuum and clog data, eliminating display panel checks during procedures.

Augmented flow passages in the connector prevent occlusion of thick fluids while reduced-diameter interfaces maintain ISO safety standards.

Multi-layer dressings sustain nitric oxide delivery by reacting nitrite salts with acidic groups activated by wound exudate.

A porous insert traps residual fluid by capillary action, preventing clogging and contamination in fluid dispenser devices.

A microdermabrasion tip incorporates solid active ingredients for direct skin delivery.

Electrode structures apply localized stress to rupture membranes, enabling precise drug release while minimizing energy consumption.

A portable suction pump uses a rotating fluid collection container to establish a leak-tight seal along a common axis.

A refill assembly lockout override mechanism enables dose release without a reusable base.

Magnetic coupling eliminates shaft seals to reduce blood damage while hydrodynamic grooves lower power consumption for extended operation.

A spiral ring pump uses an eccentric cam to compress a tube, reducing device size and vibration while maintaining reliable drug delivery.

Dual-layer sleeve expands for device delivery and retracts passively, reducing vascular injury during TAVR procedures.

Solid separating agents coat slit walls to prevent closure during gamma sterilization, maintaining transparency and material properties without bulk additives.

A liquid medicine administration device uses a rib and attachment detection sensor to determine cartridge status.

A syringe pump occlusion detection system calculates force slope differences to establish a dynamic baseline for pressure monitoring.

Acoustic transducers eject fluid droplets through skin, eliminating invasive needle insertion and reducing infection risk in implantable medical devices.

A wearable electronic device detects mechanical vibrations and acoustic noise from injection devices to monitor dose setting.