Intravenous Devices TRIZ Cases

Segmented barrels merge irrigation with aspiration to prevent apical perforation and remove necrotic debris.

An integral closure unit with a frangible link severs upon removal to indicate tampering.

A wound healing system applies combined positive and negative pressure through porous foam to promote granulation tissue growth.

Segmented screw threads with varying leads allow a tilting nut member to detect the final dose position and prevent under-dosing.

A medical suction handle integrates an on/off valve and thumb-control port within a single housing to manage airflow.

Relocating sensors from disposable blades to the handpiece eliminates blade complexity while maintaining optimal fluid flow through precise window control.

Convex stopper heads reduce capillary adhesion during storage, preventing sticking while minimizing dead space and pharmaceutical residue.

Raised sections with bevels align pharmaceutical containers, preventing twisting and bouncing during transport.

Retaining collars secure a pliable suction tube around teeth, maintaining consistent proximity to aerosol sources while preventing procedure disruption.

Dynamic coupling prevents accidental dispensing during dose correction by locking reverse rotation while allowing precise unidirectional delivery.

A suction apparatus evacuates surgical smoke using an extendable tube and interchangeable tip extensions positioned adjacent to the electrocautery electrode.

Automated meat quality detection system using artificial vision to locate puncture points for precise pH signal measurement.

A compensatory container uses a pressure-reactive volume chamber to attenuate peak blood pressures.

Ratchet grooves on the injecting piston-rod engage with an anti-return member to prevent backward motion, ensuring single-use functionality.

A pressure-reduction module creates localized negative pressure to expand underlying veins for easier cannulation.

Segmented pouches and tortuous closures maintain sterility while preventing accidental needle sticks during bulk storage.

A modular training device uses transparent elastomeric layers to simulate human skin and subcutaneous tissue for realistic negative pressure therapy practice.

A dual flow restriction device measures pressure differences across defined resistances to determine fluid flow rates in infusion systems.

A syringe assembly uses a locking element to disable the plunger rod after use.

Spiral groove and stop ring limit dose setting to remaining medicament quantity, preventing incorrect dosing.

A disposable purging device expels air bubbles from medical tubing during blood pump connections.

A pen injector actuator uses a track with distinct portions to limit plunger travel, eliminating the need for multiple devices and reducing user error.

Segmented cap segments move dynamically to seal female connectors while housing integrates tamper evidence without increasing complexity.

An ion exchange member reduces ionic concentration in wound fluid before it reaches the absorbent.

Optical proximity sensor detects eye state to time therapeutic drop release.

Sealed coupling flanges and a sliding cartridge enable precise powder dosing while preventing contamination risks in sterile applications.

Segmented holding elements secure primary packaging containers within secondary structures to maintain equilibrium orientation during transport.

Segmented components including a clutch and stop means resolve contradictions between dose precision and operational simplicity in drug delivery devices.

A vein holder with a bottom flange stabilizes skin and compresses the target vein to enable precise needle access.

Telescopic dose drums and snap-fit sleeves reduce component count and rattling noise while preventing over-dosing in medicament devices.

A tapered collet mechanism clamps fine gauge cannulas during injection molding, preventing crimp damage while ensuring reliable retention.

Segmented coupling mechanism prevents accidental dose dial rotation while allowing independent driver part movement.

Reusable drainage tube attachment allows fluid collection container replacement without removing the patient tube, reducing operating expenses.

A push button connection uses a pivot bearing to minimize friction between the push button and driving part.

An integrated suction hose extracts pharyngeal saliva before it enters the trachea, preventing aspiration pneumonia in stroke patients.

A reciprocating syringe uses mechanically coupled plungers to enable stable one-handed fluid control.

Replacing straight inter-rib surfaces with a curved geometry reduces insertion friction by 10-50%, easing plunger movement while maintaining closure integrity.

Automated peristaltic pumping and sensor feedback control accurate fluid volume delivery while eliminating air bubbles in the tubing.

An electromagnetic pumping system assists heart contractions using magnetic force interactions between electromagnets and permanent magnets.

Pre-formed tapered teeth shear plunger and support structures, reducing activation force while maintaining manufacturing simplicity.

A graft syringe assembly with a rotatable delivery tube enables precise bone graft placement.

A syringe assembly uses an indexing locking element to prevent reuse after a set number of plunger strokes.

Adjustable plunger stop limits injection depth to deliver precise medication volumes, reducing administration errors during high-stress emergency procedures.

A unitary vacuum regulator houses a concentric gauge, rotating to adjust air bleed through a helical shoulder mechanism.

Detachable interface devices increase plunger surface area, reducing thumb pressure and easing medication administration for users with limited dexterity.

A hydraulic picker uses pressure gradients to aspirate and dispense target analytes with precision.

A surgical aspiration and irrigation device uses a sliding inner cylinder and valve to manage fluid flow through dual lumens.

A sterile packing system uses a rigid container with small holes and a porous non-rigid part to allow water vapor diffusion.

Raised plateaus on a supporting plate increase stiffness to reduce deflection below 2.5 mm, preventing misalignment between containers and filling machines.