Medical Devices TRIZ Cases

Skin-contact sensing blocks unintended negative pressure startup and lets wound therapy control conserve power as energy declines.

A peristaltic-pump manifold with expansion chambers improves low-flow accuracy, smooths pulsation, and removes bubbles in peritoneal dialysis.

An elastomeric clamp segment resists tubing compression set, keeping an IV roller clamp fixed and fluid flow accurate over time.

Flexible flat cables isolate aperture-plate vibration from the contact pin head, reducing fretting wear and spring fatigue in nebulizers.

Current-sensed startup sweeps find and lock the nebulizer head resonance, limiting temperature rise and preserving aerosol quality.

A dual-nostril inserter uses columella-guided self-positioning to improve nasal targeting and reliable delivery across anatomical variation.

Cold-air Venturi atomization draws essence into a fast air stream to disperse fine droplets without heat, dilution, or surface damage.

Chemical reagent test components analyze spent peritoneal dialysate quickly, enabling more objective home peritonitis detection.

Flexible tubes replace membrane-based flow paths in a PD cassette, cutting leaks and simplifying actuator demands for more reliable dialysis.

A forehead-contact EEG unit in an eyeshade enables brain-state sensing and adaptive eye heating while keeping the controller detachable for maintenance.

Wireless ear electrodes and a chest band replace ECG-wired vagus stimulation, preserving respiratory-cycle timing and user mobility.

A sliding mouthpiece and pre-positioned piercing unit perforate the capsule while creating an air inlet space for smoother dry powder delivery.

Blue light generates reactive oxygen species while low-dose UV damages DNA, boosting sterilization without increasing harm to the human body.

A removable cannula infusion set separates disposable and reusable parts to cut wearable size and weight while enabling easier repositioning.

A segmented flow path inside a centrifugal separator improves white blood cell removal by combining pre-separation with in-device filtration.

An outflow hose keeps intake and discharge ports on opposite sides of the heart valve, improving shift tolerance without added hydraulic loss.

A folded evaporator film creates a thermally decoupled supply channel to raise vaporization rate in compact inhalers without enlarging the wick.

A rotating multi-vial cartridge enables equal nasal dosing across nostrils while reducing waste and simplifying repeated drug delivery.

A weakened capsule opening and built-in desiccant keep inhalation powder dry, prevent clumping, and support reliable delivery.

Fine 5-10 micron droplets pass through hair-parting comb teeth to spread care solution evenly from scalp and roots to hair tips.

A spring-loaded footplate senses skin contact and deflects a membrane to shut off fluid flow when a needle becomes dislodged.

A weakened capsule portion guides needle piercing to form consistent openings, improving powder dosing accuracy and reducing powder retention.

Pull tabs, rings, and side grips help on-body injector adhesives stay secure during delivery while allowing easier, less uncomfortable removal.

Gravity fills the metering chamber while capillary action retains one dose, enabling comfortable nasal spraying without head tilting or complex dosing parts.

Audible and tactile feedback from simple movable elements helps simulate needle penetration and dose delivery for more effective auto-injector training.

An axial projection in the storage box locks the inhaler reservoir outside the chamber, preventing impact-driven movement, powder loss, and contamination.

A weakened pierce zone, desiccant, and flow obstruction keep inhaled powder from solidifying and reaching the user as clumps.

Tangential airflow spins a single-dose reservoir in the chamber to improve powder dispersion, simplify dosing, and support near-complete emptying.

Weight sensing, gravity drain, and a reusable trolley cut peritoneal dialysis disposable cost and waste while simplifying fluid handling.

Rotational friction melting joins a metal or ceramic sleeve to a flexible tube without adhesives, improving retention and production efficiency.

Vaporized steam mixes with particulate drug to improve lung delivery, reduce residue in the inhaler, and avoid excessive inhalation.

Ultrasonic levitation and venturi de-agglomeration keep dry powder aerosols concentrated and stable while reducing clogging over time.

A solenoid field and in-field collimator converge on-axis particles and stop off-axis beam components to cut beam loss, heat, and accelerator damage.

A fenestrated external collector with wicking layers, shape retention, and suction diversion improves urine capture while reducing leakage and discomfort.

Colored indicator zones and an axially offset spring keep the viewing window clear, helping users verify each dispensed dose.

Combining topical oxygen generation with negative pressure helps treat stalled or infected wounds while supporting stable long-term operation.

A wearable patch pump uses a reusable cap, sensors, and a cam-lever microdosing mechanism to deliver precise insulin with fewer user errors.

Water-disintegrable sealing zones let self-expandable GI compartments deploy for tissue contact, then break apart for safe evacuation.

A downstream outflow hose preserves valve-side separation during pump shifts, reducing hemolysis risk without a longer high-loss intake cannula.

A sliding cartridge and releasable lock keep the septum sealed until use, improving hygiene, dose precision, and safe self-administration.

Strain sensors in an abdominal negative-pressure dressing enable closed-loop pressure adjustment to maintain consistent closure forces as tissue changes.

Adaptive ASMR volume and massage pressure are synchronized to sleep state, improving deep sleep induction without disturbing user comfort.

A flexible trapping assembly stays at the ileocecal valve, blocks ingestible drug carriers, and allows chyme flow for steadier local release.

A resilient manual pump built into the bandage applies wound suction, limits excess negative pressure, and simplifies NPWT use.

Pressure differentials move a wearable injector needle between retracted and extended positions, reducing discomfort and mechanism complexity.

Independent spacer clamping in a dialysis conductivity probe preserves sealing while allowing quick correction of assembly errors.

Pressure sensing and staged air bursts clear pooled urine from dependent drainage loops, reducing CAUTI risk without patient trauma.

Humid air delivered through an integrated or remote humidifier keeps wounds moist without liquid instillation or separate NPWT hardware.

A flexible base lets the sensor and infusion hub move independently, reducing see-saw motion, cross-talk, and glucose reading errors.

Dynamic leak thresholds in NPWT adapt to dressing quality and leak events to cut false alarms, improve compliance, and save battery life.

Segmented scratching barbs deliver distinct allergens simultaneously, eliminating cross-contamination risks inherent in sequential needle pricks.

An expander rib on the door engages a biased spring clamp to prevent uncontrolled infusion when the hose is not fully inserted.

A therapeutic focus strap integrates rotatable beads and textured patterns to deliver tactile stimulation for cognitive engagement.

Motion sensors detect user gestures to activate tattoo machine power supplies, eliminating direct interface contact and reducing biological contamination risks.

Curving the capillary tube increases surface area contact, reducing energy consumption while maintaining compact device size.

Segmented piercers create multiple evenly spaced holes in the blister body, ensuring complete powder delivery and resolving dosing precision issues.

Internal protrusions in a hollow needle selectively retain fatty tissue while sparing the dermis, reducing bleeding risks.

A method controls adhesive viscosity via precise temperature matching between contact surfaces and bonding material to ensure reliable connections.

Segmented fluid receptacle design reduces priming volume in implantable vascular access ports.