Passive Start Drip Chamber Float Flow Control
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Solution Overview
Problem
In medical infusion therapy, existing technologies fail to accurately control the flow of primary and secondary fluid sources to ensure complete and precise delivery of secondary fluids to patients without interrupting the primary fluid flow, often requiring caregiver adjustments.
Innovation Solution
A passive start drip chamber device with a float mechanism that occludes and opens the first input flow port based on fluid levels within the chamber, allowing precise control of fluid flow by diverting primary fluid flow during secondary fluid delivery and resuming it after secondary fluid cessation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a float mechanism is added to automatically control fluid flow, then automation and precision of fluid delivery are improved, but device complexity increases
Solution Approach 1:
The float mechanism automatically responds to fluid level changes without requiring external power sources, control systems, or human intervention. The float rises with fluid level to occlude the flow port and falls when fluid is depleted to reopen it, creating a self-regulating system that eliminates the need for complex electronic controls while maintaining precise fluid delivery.
Solution Approach 2:
The invention utilizes hydraulic principles by employing a float that responds to fluid level changes within the chamber. The float's buoyancy-driven movement automatically opens and closes the flow port based on fluid presence, leveraging fluid pressure and buoyancy forces to achieve automatic control without mechanical actuators or electronic systems.
2Device complexity
If manual monitoring and adjustment by caregiver is used, then device complexity is reduced, but precision and reliability of fluid delivery deteriorates
Solution Approach 1:
The float mechanism provides continuous feedback based on fluid level conditions. As fluid enters or leaves the chamber, the float responds immediately to level changes, automatically adjusting the flow port state to maintain precise delivery. This feedback loop ensures reliable operation without requiring manual monitoring or adjustment by the caregiver.
3Reliability
If primary fluid flow is interrupted during secondary fluid delivery, then complete delivery of secondary fluid is achieved, but total therapy time increases
Solution Approach 1:
The flow port state is dynamically adjusted based on real-time fluid level conditions in the chamber. When secondary fluid is present, the float rises to occlude the port and redirect flow. When secondary fluid is depleted, the float falls to reopen the port and resume primary fluid flow. This dynamic adaptation ensures complete secondary fluid delivery while minimizing interruptions to primary fluid therapy.
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
Ensures complete and accurate delivery of secondary fluids to patients with minimal caregiver intervention by automatically regulating fluid flow through the float's occluding and open configurations, preventing air from reaching the patient and optimizing fluid pathway management.
Implementation Method 1
a float within the interior chamber, the float comprising a portion configured to extend into the opening; wherein the float is configured to rise and fall in the chamber based on a fluid level within the chamber
Data Source
AI summary
A drip chamber is described that is used in medical infusion therapy, wherein the drip chamber utilizes valving to control flow of one or more fluids to a patient. The drip chamber includes a body forming a chamber, wherein fluid may enter via two or more flow ports, and an output port, where fluid may exit the chamber. A float controls fluid flow through one or more flow ports into the chamber such that the flow exiting the chamber may be limited to a single fluid or a combination of the fluids entering the chamber. The float is configured to be retained within the chamber, and the float moves within the chamber based on a level of fluid within the chamber. The control characteristics of the float are determinable by attributing specific buoyancy and dimensions to the float.