Medical Devices TRIZ Cases

Spiral-wound composite shaft layers, a bearing coil sleeve, lubrication, and thrust bearing help blood pump catheters resist fatigue, wear, and breakage.

A liquid storing member acts as a stopper and redirects droplets to side outlets, preventing non-atomized liquid tobacco from reaching the user.

An axial catch-and-release tubing connector keeps valve-biasing parts outside the fluid path to improve secure disconnection and reduce biofilm risk.

A curved bevel that tapers toward the tip removes ridge formation in puncture needles, lowering insertion resistance and patient pain.

Projection lengths, blocking members, and keyed grooves stop wrong Luer pairings between IV and epidural lines while maintaining a fluid-tight seal.

A rotary valve body integrates the flushing inlet to save housing space, guide flushing flow, and reduce leak-prone sealing points in infusion therapy.

A contact-actuated switch powers the dispenser evaluation unit only when attached, cutting battery drain while preserving monitoring and data transfer.

Bottom or side needle filling keeps the wick dry to vent air, enabling complete vaporizer cartridge filling without leakage.

A simplified implantable IC clock tree cuts delay elements to lower power use, save chip area, and keep data timing aligned.

A slotted hollow pin and deformable elastic element simplify assembly while keeping infusion line connectors hermetically sealed under high pressure.

A segmented braided microcatheter with a braid-free distal tip improves peripheral vessel access and bead delivery while limiting reflux.

Deformable membranes let pump sensors verify liquid flow without tube material or size limits, while simplifying attachment and sealing.

A heater-through-capsule structure generates aerosol from plant substrates while staying below pyrolysis to limit combustion byproducts.

Per-path pressure sensing lets one NPWT unit detect leaks, blockages, and overpressure while treating multiple wounds with separate dressings.

Multiple piezoelectric vacuum sources on a wound dressing improve pressure uniformity and fluid removal for large or irregular wounds.

A three-part cap with a tubular body, shield remover, and lid simplifies assembly while keeping shield attachment secure and removal reliable.

Textured plate surfaces agitate powdered hemostatic agents during endoscopic delivery to prevent clogging and improve dosing consistency.

A nested sheath-cannula hub enables ECMO flow and interventional access through one puncture while reducing air embolism and clamp-related damage.

A rotating maceration wire and vacuum aspiration path remove thrombus in one disposable setup, simplifying sterilization and reducing reuse risk.

An LC resonant circuit detects frequency shifts from aerosol articles to verify authenticity and prevent counterfeit use in heat-not-burn devices.

Programmable burst dosing through a transdermal patch uses solvent evaporation and a vent gap to maintain effect while limiting tolerance and overdose risk.

A channel-and-undercut cannula retains the sensor during insertion while combining sensing and infusion at one site to reduce trauma.

A shaft encoder replaces direct Hall sensing to auto-calibrate blood bag tray motion and improve position accuracy under disturbance.

A smooth cannula, rounded obturator, and hydrodissection reduce subcutaneous pellet insertion trauma, scarring, and extrusion risk.

Sequential neutron irradiation from different directions with patient posture changes improves dose uniformity and protects drug delivery lines.

A CMOS microfluidic aerosolizer avoids nebulizer shear, preserving lipid nanoparticle structure and mRNA encapsulation for lung delivery.

Disposable training cartridges isolate fluid reservoirs to prevent cross-contamination while enabling realistic medical pump practice.

A buckle-linked atomization and battery assembly enables separate replacement, longer use time, and leak-safe e-liquid handling.

Cyclically varying the left-right ear frequency difference improves binaural beat induction and sustains user focus without manual tuning.

A grooved buckle and contoured clamping design secure the infusion line, improve bubble detection, and reduce wear and part count.

A rigid capillary gap replaces the wick to feed vaporizable material evenly to the heater, reducing clogging, volume use, and manufacturing complexity.

A movable protective cover shields the refill opening, balancing easy refilling with child-resistant sealing and leak prevention.

Real-time pressure feedback pauses and resumes pump flow to prevent fluid line leaks and delivery failures in wearable drug delivery.

Dual translation and rotation locks keep a needle shield closed until a set pull force is applied, improving sterility and handling.

A capillary wall structure absorbs and evaporates aerosol substrate to cool the vaporization cavity, limiting scorching, oil frying, and leakage.

A sealed wetting chamber and movable insert release lubricant onto the catheter tube without wetting the grip, improving handling and shelf life.

A motor-driven locking ring blocks repeat actuation for a set time, helping fluid dispensers prevent overdose and unauthorized use.

A porous wick and impermeable barrier collect urine away from the urethral area, improving comfort, hygiene, and fluid monitoring.

Microgrooves and a porous vaporization core regulate e-liquid by capillary action to prevent leakage, burnt flavor, and liquid explosion.

A bidirectional peristaltic APD pump uses pressure-sensing pods and PID control to cut noise, avoid sealing issues, and keep patient pressure safe.

A movable septum core and linear cannula guide keep piercing perpendicular, improving sealing and reducing leakage in modular infusion pumps.

A reciprocating coloring rod and sleeve mimic tattoo tool motion, helping trainees build muscle memory and shorten microblading practice time.

Periodic excitation pulses and current-voltage feedback improve tissue impedance monitoring while limiting motion error and tissue heating.

Optical pushrod tracking plus magnetic encoder cross-checking detects occlusions and encoder faults without extra force sensors.

Dual pressure sensors and pulsatile gas flow improve body cavity pressure measurement and detect hose occlusions during minimally invasive surgery.

A viscous-filled seed applicator contains radiation during handling and placement, enabling precise brachytherapy delivery with less exposure to healthy tissue.

Motor current and temperature are used to estimate wound vacuum, enabling quieter, smaller negative pressure therapy pumps with longer battery life.

A removable magnetic module senses dose wheel rotation and injection events without bulky electronics or complex EMI shielding.

Controlled forearm warming expands veins for clearer access, helping first-stick phlebotomy while limiting overheating and electrical exposure.

A movable, lockable needle entrance creates a straight flow path in an implantable access port to reduce hemolysis and ease thrombosis clearing.

A medical device uses conductivity measurements to determine solution concentration for accurate administration.

A medical fluid injector uses an intracorporeal sensing system to monitor tissue pressure and adjust pump velocity for precise delivery.

A biofluid monitoring system uses trained models to analyze input parameters from medical devices and generate alerts.

Longitudinal grooves house deployable tines that prevent stomach content occlusion during suction.

Wearable medical device uses capacitive coupling communication and body energy harvesting to reduce power consumption.

Segmented transmission paths enable independent pump speed control, resolving the trade-off between single-motor simplicity and multi-parameter adaptability.

A floatation isolation chamber applies cymatic frequencies to stimulate brain activity via a liquid medium.

An integrated filter in the transfer set removes contaminants from dialysate, preventing bacterial infection risks during peritoneal dialysis therapy.

A catheter backend mechanism uses a pulley and capstan to steer elongate medical instruments with precision.

A dry powder inhaler uses a locking mechanism to prevent accidental multiple dosing during medication delivery.

Automated temperature profiles tailored to pod contents ensure consistent vapor quality while reducing contamination risks.

Intravesical trospium delivery device releases drug into bladder urine to achieve sustained therapeutic concentrations in tissue.

Offset sensors detect capacitance changes from applied force, resolving non-specific measurements in cardiac tissue mapping.

An elastic return spring pushes a liquid stopper against an e-liquid hole in the atomizing sleeve, preventing leakage when the atomizing core is removed.

An expandable housing dynamically retracts a piercing needle to minimize infection risk and patient discomfort during infusion therapy.

Internal ribs center the catheter while an aspiration port removes air from the chamber, preventing embolisms without manual intervention.

A swallowable capsule deploys an aligner to position against the intestinal wall for targeted drug release.

Segmenting internal channels prevents fluid interaction while merging separate infusion sets into a single device, improving patient compliance.

A drug delivery pump drive mechanism uses parallel biasing members and a retainer to move a piston for dispensing medicine.

Removable housing enables aseptic seal and filter replacement without surgical intervention, reducing patient risk.

A symmetrical channel tube heater integrates sensors directly into hollow channels to ensure homogeneous radial heating.

A stereotactic device uses a laser line beam to indicate the brain coordinate reference point for primate surgery.

Movable chambers adjust metered dose volume while a universal adapter interfaces with multiple medication containers to eliminate needle-stick risks.

Segmenting storage and mixing chambers resolves the contradiction between device size and delivery precision while extending medication shelf life.

Radially expanding diffuser resists omental blockage, enabling sustained 100-200 ml/min flow during peritoneal dialysis.

Replacing quartz cuvettes with disposable UV transmissive adapters removes ambient light shielding requirements while maintaining measurement precision.

Flexible nosepiece expands sagittally to open the nasal valve, enabling precise olfactory region deposition despite anatomical constraints.

Waterproof gasket with unequal openings creates a non-horizontal surface to drain liquid medicament from the nebulizing unit.

Radial piston brake sensors detect syringe presence and position, resolving reliability complexity trade-offs by preventing incorrect medication delivery.

Increasing air chamber volume and pressure improves powder deposition on ethmoid sinuses.

A motion sickness mitigation device generates electrical stimulation pulses to reduce nausea in vehicle occupants.

Segmented stop mechanism constrains actuator movement to prevent incorrect dosing and indicate empty status.

Motor-driven reel assembly uses a triangular pressure transducer to detect line contact and trigger automatic extension.

Feedback-controlled extrusion using laser gauges and gear pumps eliminates defects while maintaining dimensional accuracy over long tubing lengths.

A braided polyimide tube with a spring coil provides column strength and torque transmission for medical catheters.

Corrugated edges on a workpiece carrier enable vertical stacking of drug delivery components, reducing logistics costs.

A feeding tube uses a Luer-Lock connector to attach a suction line directly to the device.

A medical injection device uses a retaining channel to orient a flexible conduit segment perpendicular to the needle axis during extraction.

Isolating the organ in a closed-loop ex vivo perfusion system eliminates systemic side-effects from uncontrolled stem cell infusion.

Elastomeric mechanical vacuum dressing creates negative pressure through one-way valves, addressing bulky NPWT systems.

An inclined guide portion on the gripping member directs the plunger flange outward during syringe removal.

Replacing heavy electrical heaters, a chemical heat generation layer activates via ambient oxygen to warm infusion liquid without power or maintenance.

An infusion pump detects air in the fluid line by measuring pressure changes within a confined section during each cycle.

A multi-lumen coupler system separates external connectors from the indwelling catheter.

Atomizing transducer mounted below an energy accumulation aperture concentrates ultrasonic vibration for efficient vapor generation.

A flexible pressure-actuated flow control valve uses an annular flange projection to restrict radial movement within a fluid passageway.

A movable atomization core shifts position to engage the e-liquid chamber only upon battery connection.

An inclined duct reduces noise in a monolithic thoracic drainage device while maintaining constant vacuum levels for accurate air loss measurement.