Dialysis Drain Line Insulation for Electrical Isolation
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Solution Overview
Problem
During peritoneal dialysis treatments, there is a risk of creating an uninterrupted electrical current path from the patient to earth ground through the drain line, which can be dangerous due to the conductive nature of used dialysis fluid.
Innovation Solution
Implementing a flow path insulator along the drain line that creates flow segments or increases resistance to electrical current, using various mechanisms such as pumps, valves, siphons, and coiled tubing to separate the flow path and prevent continuous electrical conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drain line provides a continuous flow path for used dialysis fluid, then the system is simple and efficient, but it creates an uninterrupted electrical current path from the patient to earth ground
Solution Approach 1:
The drain line is divided into multiple segments by inserting flow path insulators at specific locations. These insulators create discrete flow segments separated by air gaps, breaking the continuous electrical conduction path while maintaining fluid drainage functionality. The segmentation approach allows the system to retain simplicity while eliminating the electrical hazard.
Solution Approach 2:
Air gaps introduced by flow path insulators serve as intermediary elements between sections of the drain line. These air gaps act as electrical insulators, preventing current flow while allowing the drainage system to function. The intermediary air segments break the direct electrical connection without requiring complex insulation materials or structures.
2Object-affected harmful factors
If flow path insulators are inserted into the drain line to break electrical continuity, then patient safety is improved, but the device complexity increases
Solution Approach 1:
The flow path insulators are designed as disposable components that can be easily inserted and discarded. This approach minimizes the long-term complexity burden on the system, as the insulators are single-use items that eliminate electrical hazards without requiring maintenance, replacement, or complex integration mechanisms. The simplicity of insertion and disposal offsets the added component count.
Solution Approach 2:
The insulators change the physical parameters of the drain line by introducing air gaps and increasing flow resistance at specific points. This parameter modification breaks electrical continuity while maintaining adequate fluid flow for drainage. The parameter changes are achieved through simple geometric features of the insulators rather than complex active mechanisms.
3Reliability
If multiple flow path insulators are used to ensure complete electrical isolation, then safety is enhanced, but the installation and operation become more complex
Solution Approach 1:
The drain line is divided into multiple segments by inserting flow path insulators at specific locations. These insulators create discrete flow segments separated by air gaps, breaking the continuous electrical conduction path while maintaining fluid drainage functionality. The segmentation approach allows the system to retain simplicity while eliminating the electrical hazard.
Solution Approach 2:
Air gaps introduced by flow path insulators serve as intermediary elements between sections of the drain line. These air gaps act as electrical insulators, preventing current flow while allowing the drainage system to function. The intermediary air segments break the direct electrical connection without requiring complex insulation materials or structures.
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 electrical currents from flowing from the patient to earth ground, ensuring patient safety by creating discontinuous flow paths and increasing resistance, while being adaptable and cost-effective.
Implementation Method 1
flow path insulator configured to separate used dialysis fluid flowing along the drain line to limit current flowing from the patient to a house drain
Data Source
AI summary
A peritoneal dialysis system includes a cycler, a disposable set operable with the cycler and including a patient line and a drain line, one of (i) a water purifier for supplying purified water for mixing to form fresh dialysis fluid at the disposable set, (ii) at least one fresh dialysis fluid container provided as part of the disposable set for supplying fresh dialysis fluid, or (iii) a dialysis fluid preparation unit configured to supply fresh dialysis fluid to the disposable set, and at least one flow path insulator provided at the cycler, the water purifier, the dialysis fluid preparation unit, and/or along the drain line. The flow path insulator is configured to separate used dialysis fluid flowing along the drain line into flow segments to limit any current flowing from the patient to a drain.