Bubble Chamber Pressure Control for Fluid Line Air Management
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Solution Overview
Problem
Inadvertent delivery of bubbles in fluid lines, particularly in clinical and industrial applications, poses risks such as defective products, false laboratory results, and potential embolic infarcts, necessitating effective bubble detection and management systems.
Innovation Solution
A system utilizing a dual pressure network with a bubble chamber and pressure transducer to trap bubbles, combined with a controller unit for real-time monitoring and control, detects and manages bubbles by analyzing pressure changes and applying positive intraluminal pressure to prevent ambient gas entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bubbles are allowed to travel through the fluid delivery path, then the system is simpler without additional components, but bubbles cause harmful effects such as embolic infarcts and defective products
Solution Approach 1:
The patent extracts bubbles from the fluid delivery path by introducing a separate vent line that leads to a bubble trap chamber. Bubbles are removed from the main fluid path and collected in the trap chamber where they can be safely discharged to the atmosphere, eliminating the harmful effects of bubbles while maintaining system simplicity
Solution Approach 2:
The patent introduces a bubble trap chamber as an intermediary component between the fluid delivery path and the atmosphere. This mediator allows bubbles to be safely vented without directly exposing the fluid path to atmospheric pressure variations, thus preventing bubble formation while maintaining system simplicity
2Object-affected harmful factors
If a bubble trap chamber and vent line are added to remove bubbles, then bubble harmful effects are prevented, but device complexity increases
Solution Approach 1:
The patent combines the bubble trap chamber with the existing fluid delivery system by integrating the vent line into the pump housing or catheter structure. This merging approach allows bubble removal functionality to be added without requiring completely separate systems, thus reducing the increase in device complexity
Solution Approach 2:
The vent line serves multiple functions: it acts as a bubble escape route, a pressure equalization path, and a reference pressure source for detection. This multi-functionality reduces the need for additional components, thereby minimizing the increase in device complexity while effectively preventing bubble harmful effects
3Measurement precision
If pressure transducers and dual pressure networks are implemented for bubble detection, then bubble detection precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical bubble detection systems with pressure-based detection using transducers. By measuring pressure variations in the fluid path and comparing them against reference pressure from the vent line, the system achieves high bubble detection precision through electrical sensing rather than mechanical means, thus reducing overall system complexity
Solution Approach 2:
The patent implements a feedback mechanism where pressure transducer readings are continuously monitored and compared against threshold values. When abnormal pressure variations indicating bubble presence are detected, the system can trigger alarms or adjust pump operation. This feedback loop provides precise bubble detection while using simple computational logic, minimizing the increase in device complexity
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
Effectively prevents bubble propagation by trapping and removing bubbles, ensuring safe and precise fluid delivery through fluid lines, reducing the risk of embolic infarcts and ensuring product quality.
Implementation Method 1
A bubble chamber integrated into a proximal position of the second fluid path... the bubble chamber includes a bubble chamber outlet positioned towards gravity
Implementation Method 2
a first sensor integrated into a distal position of the second fluid path wherein the first sensor is a pressure transducer
Implementation Method 3
Bubbles that enter the fluid path may be advantageously managed by creating a positive intraluminal pressure and avoid ambient gas from entering the fluid path
Data Source
AI summary
A system for managing air bubbles in fluid lines includes a pump, valves, a bubble chamber, sensors, and a controller unit. The pump pulls fluid from a reservoir, valves create a dual pressure network, and the bubble chamber captures air bubbles. Sensors measure physical properties and the controller unit receives input from these sensors to control system components.