Infusion Syringes TRIZ Cases

Pressure-responsive valves isolate multiple wound sites from a shared suction source, preventing cross-contamination during simultaneous treatment.

Rotating a piston sleeve opens a valve channel within an insert, enabling closed-system medication mixing while maintaining sterility.

A pharmaceutical receptacle uses a lubricant layer on the barrel inner surface to modulate dynamic friction between the charge and side walls.

A fiber optic imaging catheter delivers selected wavelengths to activate and cure photodynamic agents, preventing device adherence during aneurysm treatment.

Segmented valve assembly with removable Luer cap prevents blood reflux and reduces bacterial colonization on connector surfaces.

A permeable tissue collection vessel with a vacuum system separates fat from fluids, reducing manual handling and contamination risks.

A disposable infusion pump uses a compressible tube and mechanical compressor to deliver liquid medicament.

Multi-liquid delivery device with dual hollow cartridges and removable funnel feeds separate biocomponents to a mixing manifold.

An adapter with an asymmetric flange resolves ergonomic inadequacies in standard syringe finger flanges.

A threaded spindle converts plunger rod movement into dial rotation to display injection progress visually.

An asymmetric connection device prevents accidental needle attachment, resolving the contradiction between assembly ease and sterility maintenance.

A foil counter element with indentations and a drive member catch tracks dispensed doses in drug delivery devices.

A thin, flexible sleeve collapses under low force to prevent needle contamination while allowing clear visualization of the injection site.

Radial snap engagement secures the needle set, eliminating axial displacement that causes injection discomfort and blood stasis.

A clip mechanism on an end cap secures the stylet distal portion, reducing manipulation time and effort during multiple tissue sampling.

Two diametrically opposite bumps with chamfered surfaces reduce activation force variability for consistent needle shielding.

An elastomeric sealing lip reduces friction while preventing reflux through partial deflection, ensuring complete dose delivery.

Elastic lip prevents cap refitting after needle release, ensuring single-use verification and contamination detection.

Frangible connections in tamper evident caps prevent injury and contamination risks by breaking under force while maintaining a secure seal.

A dual syringe system merges harvesting and transfer functions into a single closed assembly to move cells without external exposure.

A syringe pull-back element with a biasing force structure locks the needle after use.

Segmenting the cap allows independent removal of the tip while retaining illumination and grip for precise injection in low light.

A fluid delivery device uses an adhesive cannula and needle guide to enable continuous medication administration through a single skin insertion.

Segmented hub barrels isolate the infusion needle from the injection site, filtering contaminants while reducing insertion resistance against rubber vial seals.

Interlocking second member applies controlled compression to barrier membrane, eliminating premature wear and extending working life.

A plastic spring retracts the needle into the housing, preventing metal fatigue and ensuring complete coverage.

Segmented plunger design resolves the contradiction between container closure integrity and low dispensing force without flowable lubricants.

A nested second tube stores lubricant to replenish the plunger and prevent wear from oil shortages.

A potential control unit applies a tracking voltage to reduce parasitic capacitance effects in touch input sensing electrodes.

Segmented inflatable pouches adapt to varying device diameters, preventing fluid leakage during simultaneous multi-device insertion.

A self-blunting needle uses a curved blunting member to cover the puncture tip upon fluid expulsion.

A single-shot molded safety device shields the needle via an articulated arm, reducing manufacturing complexity and cost.

Patient-based plunger markings eliminate volumetric calculation errors by displaying direct dosage indicators correlated with patient weight and age criteria.

Nested needle guards and breakable seals eliminate visible needle exposure, reducing patient anxiety and preventing accidental finger pricks during use.

Thick-walled syringe barrel design enables precise measurement markings at 0.0025 mL increments.

Curved internal chamber generates fluid vortex that suspends air bubbles, delaying their passage to prevent patient harm during high-pressure injection.

Integrating a sealed cleansing swab within the needle cap eliminates separate supplies while preventing fluid evaporation.

Segmented plunger elements connected by a cord align to displace the piston, ensuring complete dose delivery while minimizing device length.

Relocating support structure to tubular distal end prevents plunger rod bowing under pressure while maintaining consistent dosage trajectory.

Automated injection mechanism eliminates nursing staff monitoring burden while ensuring accurate dosage timing.

Automated filling system uses flow restrictors to dose oral syringes accurately.

Segmenting electronics into a removable cap resolves the complexity trade-off while enabling passive compliance tracking.

A medical tubing sheath with a retention portion and ratcheting mechanism for secure connector attachment.

A telescopic needle shield uses a spring-biased lock arm to engage detents for controlled shielding.

Roughening male and female screw surfaces between Ra 1.0 and Ra 2.0 prevents stick slip during barrel engagement.

A polyoxymethylene composition uses a multi-agent stabilizer package to reduce formaldehyde emissions below 5 ppm.

An injector head uses a magnetic switch to detect syringes, eliminating optical misreadings and flex ring wear.

A syringe cap uses a displaceable viewing portion to indicate opening status through visible appearance changes.

Reflective ramps on the syringe barrel redirect light signals to activate sensors, eliminating flex ring wear and fluid leakage risks.