Medical Devices TRIZ Cases

A pressure chamber and flexible container automate peritoneal dialysis fluid pumping while cutting APD setup time, waste, and machine bulk.

An identification member lets the pump detect nutritional liquid characteristics and automatically set flow rates for accurate enteral feeding.

A reduced-pressure zone amplifies inhalation energy to improve dry powder deagglomeration, stabilize fine particle delivery, and cut throat deposition.

An L-shaped airflow path with a side-wall air inlet reduces condensate overflow, improves aerosol delivery, and protects electrical connections.

A carrier-backed adhesive support holds stretchable thin films within distortion limits, preserving via registration for flexible microelectronic fabrication.

Capacitance-based sensing detects no-tube, dry-tube, and fluid states in dialysis tubing without errors from ambient light or fluid type.

Detachable electrode modules and reconfigurable channel linkages let one facial stimulator deliver both eye treatment and sleep treatment.

Rotatable textured wings fold into a compact form, giving portable tactile stimulation that supports focus and calming during daily use.

A microtextured nonfibrous wick improves liquid delivery to the heater, reducing uneven vaporization, charring, and atomizer wear.

Varying outer-layer resin hardness smooths rigidity transitions in catheters, reducing stress concentration, kinks, and breakage in bent vessels.

Contoured low-friction interface features cut needle shield removal force while preserving sterile syringe sealing and needle-stick safety.

A pressurized chamber and inflatable bladder replace bulky APD disposables, enabling precise fluid control in a more portable dialysis setup.

A harder outer shield supports a flexible inner shield to cut syringe needle shield removal force and prevent deformation during use.

Multi-modal sensing with eye tracking and cameras enables real-time behavioral assessment and immediate feedback for toddler developmental care.

A sealed shuttle, desiccant chamber, and permeable membrane limit moisture ingress to keep multi-dose powder inhalers stable in humid use.

A reconfigurable rotating body lets one centrifugal separator handle multiple bag sets while automating liquid transfer and balancing rotation.

A dual-rigidity overhanging adhesion member bends along the housing yet returns planar on detachment, improving skin adhesion and handling.

A removable expansion chamber lets one extracorporeal tube set support single- and dual-needle hemodialysis while simplifying hospital inventory.

Dynamic pressure feedback lets an insufflator maintain minimal cavity expansion during leaks and suctioning while reducing manual setting effort.

Electrochemical sensing in the drain line measures spent dialysate urea and glucose in real time, replacing slow manual dialysis checks.

A concave conical baffle creates reverse vortex flow to keep aerosol output stable and prevent liquid leakage, even when tilted.

Tailored functional sounds are synthesized for specific cognitive symptoms to improve awareness, safety, and daily response quality.

High-frequency vibration through a linear channel substrate atomizes fluid into uniform droplets while reducing heat exposure and cleaning needs.

An angled release flap and chamfered inlet cut insertion force, avoid skin interference, and prevent latch breakage in skin-mounted modules.

Recirculation within a disposable pump module maintains fluid homogeneity while supporting high-pressure, accurate multi-fluid delivery.

A translucent cartridge housing diffuses internal light and combines charging contacts to mimic smoking while keeping vapor delivery portable.

A spring-actuated implant lets patients trigger fixed drug doses after implantation, avoiding batteries while keeping dosing and timing precise.

A covered syringe nest protects open sterile syringes from particulates while enabling precise dosing under stable laminar airflow.

A porous substrate and surface heater replace fragile wicks to speed liquid replenishment, simplify manufacturing, and keep vaporizer cartridges compact.

Asymmetrical cartridge faces and a one-sided viewing window force correct insertion in aerosol delivery devices and prevent misalignment.

Absorption spectrophotometry with point-of-care sample preparation enables faster, precise drug concentration evaluation for dose adjustment.

Private therapeutic sound is delivered through bone conduction while compensating for tissue attenuation and adapting to motion and ambient noise.

Drive signal phase shifts reveal fluid presence in a membrane nebulizer, enabling accurate dosing and lower power use without interrupting aerosol generation.

Force sensors in the pump platen verify tube occlusion during each cycle, detecting incomplete valve closure before leakage affects dosing.

Integrated sensor SoCs inside a catheter digitize pressure, temperature, and flow signals to improve cardiac output assessment and cut cable noise.

A shared drive coordinates piston pumping and valve motion to cut back-pressure volume, leakage risk, and dosing error in wearable pumps.

Angled flow and a softer vessel-contacting section spread infusion, reduce wall shear, and limit biofilm buildup in vessels.

Localized heating expands a lubricious catheter liner against the tube wall, increasing contact area while preventing floating and stretching.

A ratchet-guided switch assembly combines dose-setting motion with power switching to cut parts, simplify assembly, and manage power reliably.

An angled stem block redirects actuation force so users with weak or stiff hands can trigger aerosol release with less thumb pressure.

Two wide Dacron bands and a hooked polysulfone anchor ring improve catheter stability and hinder bacterial migration.

A disposable vortex spray dryer turns plasma into aseptic dried particles, enabling safe use by minimally trained operators and rapid rehydration.

A sliding hub and longitudinal shearing device let clinicians trim catheter length without cutting the locking stay suture, improving comfort and fit.

Absorbent antiseptic caps disinfect medical connectors before use, creating a barrier that helps reduce catheter-related bloodstream infections.

Detachable atomizing and power modules let reusable aerosol devices replace only the consumable cartridge, cutting cost and waste.

Visible collars and lumen filaments mark the catheter soaker region, helping clinicians place fluid openings accurately during infusion or drainage.

A sectioned mounting platform enables one-hand securement device retrieval, site visibility, and sterile repositioning during hemodialysis.

Post-manufacture adjustment of counter and discharge electrode spacing lets one inhaler platform match different formulations and respiratory tissues.

A spring-driven trigger and adhesive base improve infusion set placement while reducing wearable size, weight, and skin-lift failures.

A power spring take-up spool peels and tensions the lid sheet to prevent misfeeding, over-tensioning, and premature dose exposure.