Chest Drainage Pressure Control for Pooling and Clog Detection
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Solution Overview
Problem
Current chest tube systems suffer from pooling of liquid in the drainage tubing, which prevents proper drainage, and clogging, which obstructs suction, leading to increased risk of pericardial tamponade and respiratory compromise, while also providing inaccurate fluid volume and air leak measurements.
Innovation Solution
A chest drainage system with integrated pressure sensors and controllers that actively monitor and adjust suction levels to prevent pooling and clogging, using active and passive valves to clear obstructions and provide accurate fluid volume and air leak measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid drains freely from the chest toward the suction container, then drainage efficiency is improved, but liquid pools in the drainage tubing preventing negative pressure transmission
Solution Approach 1:
The system performs preliminary action by continuously monitoring pressure and proactively adjusting suction levels before pooling occurs. The controller detects pressure changes indicating liquid accumulation and increases suction to prevent pooling, maintaining reliable negative pressure transmission while ensuring continuous drainage.
Solution Approach 2:
The system implements feedback by continuously monitoring pressure in the drainage tubing and using this information to dynamically adjust suction levels. The controller receives pressure signals and modifies pump operation accordingly, resolving the contradiction between maintaining drainage efficiency and preventing pooling that compromises negative pressure transmission.
2Reliability
If suction level is increased to prevent pooling, then negative pressure transmission is improved, but clogging may occur obstructing the chest tube
Solution Approach 1:
The system applies dynamics by continuously varying suction levels based on real-time pressure conditions rather than maintaining a fixed high suction level. The controller dynamically adjusts pump operation to provide sufficient negative pressure transmission while avoiding excessively high suction that could cause clogging, adapting to changing drainage conditions.
Solution Approach 2:
The system changes parameters by adjusting suction level based on pressure feedback. When pressure indicates proper drainage, suction is maintained at therapeutic levels; when pressure changes suggest approaching clog conditions, suction is modulated to prevent obstruction, thus maintaining reliable negative pressure transmission without causing clogging.
3Reliability
If clinicians use cautious clinical decisions based on inaccurate measurements, then patient safety is prioritized, but hospital stay duration increases
Solution Approach 1:
The system replaces subjective mechanical measurement methods with electronic pressure sensing and automated measurement. The pressure sensor and controller provide objective, accurate measurements of drainage parameters, eliminating the need for cautious clinical decisions based on inaccurate subjective assessments, thereby enabling earlier safe discharge without compromising patient safety.
Solution Approach 2:
The system performs self-service by automatically monitoring and measuring drainage parameters without requiring manual assessment. The automated pressure monitoring and measurement capabilities provide continuous accurate data, eliminating the need for clinicians to make cautious decisions due to measurement uncertainty, thus reducing unnecessary hospital stays while maintaining safety.
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 system effectively reduces pooling and clogging, ensuring continuous negative pressure, providing objective and accurate fluid volume and air leak measurements, thereby reducing patient risk and hospital stay duration.
Implementation Method 1
A pressure sensor may be positioned proximal to the chest tube and in communication with the chest tube drainage lumen
Implementation Method 2
suction is commonly applied continuously to remove excess air and/or fluid from the chest
Implementation Method 3
applying a first suction level to the chest tube drainage lumen sufficient to drain the fluid from the chest tube
Data Source
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AI summary
Devices and methods for managing chest drainage include a drainage system with a chest tube having a chest tube drainage lumen and a drainage reservoir in fluid communication with the chest tube drainage lumen. A pump may be in fluid communication with the chest tube drainage lumen and a pressure sensor may be positioned proximal to the chest tube and in communication with the chest tube drainage lumen. A controller may be in communication with the pressure sensor and the pump, wherein the controller is configured to actuate the pump at a first suction level sufficient to drain a fluid from the chest tube drainage lumen. The controller is further configured to actuate the pump at a second suction level which is different from the first suction level such that an absence of attenuation in the second suction level over time is indicative of an obstruction in the chest tube.