Infusion Syringes TRIZ Cases

A sterile syringe uses a non-sliding seal to maintain fluid purity during plunger movement.

A male Luer connector accepts pen needles via threaded collar design.

A tubular safety device uses a variable slope ramp to move the needle cover, reducing activation effort.

Segmented plunger movement reduces blood loss and hematoma formation at vascular puncture sites by preventing sudden pressure drops during arterial hemostasis.

Segmented locking rings and plunger indicators align visually to prevent wrong-drug errors without increasing manufacturing complexity.

Flow valves regulate material supply during co-extrusion, eliminating coating steps and reducing waste while creating variable surface characteristics.

An inner gripping surface frictionally engages a needle shield on a medicament container, reducing needlestick injury risks during injection.

An adjustable lock member on the syringe barrel limits plunger travel to a preset distance, resolving dosage accuracy versus operational simplicity.

Segmented chambers in a single barrel reduce vascular access device connections, lowering catheter-related bloodstream infection risk.

A radiopharmaceutical fluid delivery system calculates multi-dose container configurations based on planned patient schedules to manage injection procedures.

Dynamic curvature allows precise ventral epidural placement, resolving low success rates and complication risks.

A medical device needle cap moves between protective and exposed positions to prevent contamination.

An axial groove in a dual-chamber carpule manages assembly pressure, enabling direct filling and pen system compatibility without lyophilization.

Segmenting the plunger rod central region reduces material usage and manufacturing cycle time while maintaining structural integrity against breakage.

Calibrating molten syringe inner surfaces during blow moulding resolves irregular junction edges that cause leakage.

A peristaltic pump mechanism delivers controlled fluid portions onto a collection medium for portable body fluid sampling.

A last dose stop mechanism prevents overdosing by locking the nut member against the piston rod thread when the cartridge is nearly empty.

Discontinuous threads on the syringe plunger and barrel allow rotational engagement to resolve dosage precision versus device complexity trade-offs.

A pivotable cover accessory holds an injection device and integrates a cap remover to simplify needle cap engagement.

Intersecting path curves in the limiting mechanism block movement beyond remaining cartridge volume, reducing coupling complexity.

An apparatus uses endothermic gas to numb and blanch mucosa, reducing pain during anesthetic injection.

Color-changing dose window signals near-empty medication before depletion, preventing cold injection delays.

A positioning apparatus guides an injection device through a housing channel to ensure precise needle placement on the target surface.

A cannula insertion device uses a compressible member to expand radially and secure the cannula during implantation.

Segmented sterile seal component prevents fluid ingress at the catheter-dressing exit, reducing infection risk and caregiver workload.

Replacing flex rings with a magnetic switch eliminates wear and leakage risks in medical injection systems.

Automated system transfers pharmaceutical agents from single-use capsules to product containers under pressure.

A smart dose monitoring device detects plunger motion and syringe orientation to calculate precise insulin delivery amounts.

Periodic motor rotation and stop cycles reduce initial sliding force, allowing smaller device size while maintaining administration rate.

A needle cover assembly uses a telescopic shield to protect and expose the injection needle.

Movable maximum stop component adjusts dose limits to prevent user errors and improve safety for patients with limited dexterity.

Polar and nonpolar polymer materials in a cylinder-piston system eliminate external lubricants, reducing stick-slip effects while maintaining biocompatibility.

Mechanical vibration reduces negative pressure by 30-70% during fluid extraction, improving pump ergonomics and accuracy.

A disposable microneedle patch delivers medicament via a pressurized reservoir and signals completion through an external indicator.

Specific needle tip geometries reduce insertion force and prevent particulate coring by minimizing contact with curved introducer surfaces.

A multi-stage conical plunger progressively compresses fluid to eliminate residual liquid, while V-shaped guides align the needle cap for easy fastening.

Composite medical rubber balances gas permeability for sterilization with non-elution reliability.

A syringe system uses density-matched buoys to separate blood components during centrifugation.

An enlarged coupling portion on a glass distal tip prevents adaptor deformation and ensures leak-proof connections under aging conditions.

A retractable sealing element accommodates a fluid delivery needle while preventing contamination during reservoir replacement.

A foam dispensing device uses a segmented waste outlet with a pressure valve to control material flow, enabling multiple syringe fillings from a single unit.

A syringe adapter uses a movable seal arrangement and lock mechanism to create a secure fluid connection between containers.

Segmented indicator member ruptures during tip cap removal, preventing closure detachment and providing visual tamper evidence.

Serrations and flexible arms constrain the lead screw to prevent proximal movement, ensuring accurate dose delivery.

Elastic interlocking seat retracts needle holder into barrel, eliminating manual cap insertion and preventing accidental needlestick injuries.

Segmented access mechanisms eliminate manual contact during automated dispensing, preventing contamination and unauthorized tampering of sensitive medications.

Segmented tissue-penetrating members with integrated fluid channels distribute medical agents uniformly within spinal disc volumes.

Reinforcing means on the radial protrusion reduce activation force variability, preventing inadvertent triggering while ensuring reliable needle shielding.

A resilient snap feature engages a piston rod to provide audible and visual empty status signals.