Dual-Pump Syringe Control Assembly for Accurate IV Priming

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Solution Overview

Problem

Conventional syringes often deliver excess medical fluid to patients during infusion processes, particularly in IV catheter setups, which can be problematic for fluid-restricted patients, and require manual operation prone to errors.

Innovation Solution

A syringe control assembly with integrated pump units that control fluid flow, allowing for automated priming and delivery of medical fluids, reducing excess delivery and simplifying the operation by using pump units to manage fluid flow between syringes and tubing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual syringe operation is used for fluid delivery, then the device complexity is low, but the reliability is reduced due to human error and excess fluid delivery

Engineering Contradiction:
Improvefluid delivery accuracyVSAvoidsystem structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical syringe operation with an automated pump system that uses a drive mechanism to advance the plunger. This substitution eliminates human error in fluid delivery while maintaining manageable system complexity through modular design.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The syringe system is designed to automatically control fluid delivery through the pump mechanism, which self-regulates the plunger advancement and fluid flow rate without requiring manual intervention, thereby improving reliability.

Inventive Principle:
Principle #25Self-service

2Adaptability or versatility

If extended length tubing is used in IV sets, then the adaptability is improved for patient positioning, but the loss of substance increases due to excess priming fluid delivery

Engineering Contradiction:
Improvepatient positioning flexibilityVSAvoidpriming fluid volume
Core Design Contradiction:
Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The pump system incorporates feedback control to monitor and adjust fluid delivery based on the actual volume required to prime the extended tubing. This ensures minimal priming fluid is used while still achieving proper patient positioning flexibility.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system uses controlled partial action by the pump to deliver only the necessary amount of priming fluid for the extended tubing length, avoiding excessive delivery while maintaining adaptability for various patient positions.

Inventive Principle:
Principle #16Partial or excessive action

3Productivity

If automated pump control is implemented, then the productivity is improved through simplified operation, but the device complexity increases

Engineering Contradiction:
Improveoperation efficiencyVSAvoidpump assembly structure
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The pump assembly is designed as a multi-functional unit that combines fluid delivery, priming, and control functions in a single integrated system. This universality improves operational efficiency while managing complexity through functional consolidation.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the syringe mounting rack, pump mechanism, and control system into an integrated assembly, improving productivity by simplifying operation while containing device complexity through unified design.

Inventive Principle:
Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The syringe control assembly effectively minimizes excess medical fluid delivery and simplifies the infusion process, ensuring timely and accurate medication administration without manual errors.

Implementation Method 1

a pump assembly coupled to the assembly body, the pump assembly comprising: a first pump unit in fluid communication with the first syringe port via a first pump tubing; and a second pump unit in fluid communication with the second syringe port via a second pump tubing

Methodology Applied
Scientific EffectPump: Pump

Data Source

PatentUS12403240B2Syringe control assembly
Publication Date: 2025.09.02 CAREFUSION 303 INC
  • US12403240B2 patent drawing
  • US12403240B2 patent drawing
  • US12403240B2 patent drawing

AI summary

Syringe control assemblies are described herein. A syringe control assembly includes an assembly body, a first syringe, a second syringe, and a pump assembly. The first and second syringes are releasably coupled to a syringe mounting rack of the assembly body. The pump assembly includes a first pump unit and a second pump unit. Each pump unit is in fluid communication with each respective syringe. In a priming configuration, the first pump unit is configured to draw fluid flow from the first syringe cavity and the second pump unit is configured to pump fluid flow into the second syringe cavity.