Dual-Lumen PD Line Occlusion Detection Using Pressure Sensors
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Solution Overview
Problem
Existing automated peritoneal dialysis systems often fail to accurately detect line occlusions, leading to cumbersome treatments and patient disruption due to the need for manual intervention.
Innovation Solution
A peritoneal dialysis system with a dual lumen patient line and a control unit that uses pressure sensors to monitor fluid flow and pressure differences to detect occlusions, providing precise occlusion detection and alerting the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated peritoneal dialysis systems are used, then treatment efficiency is improved, but occlusion detection accuracy deteriorates
Solution Approach 1:
The system divides the patient line into multiple segments by placing pressure sensors at different locations (proximal and distal to the patient connection). This segmentation allows independent monitoring of different line sections, enabling accurate identification of occlusion locations while maintaining automated operation.
Solution Approach 2:
Pressure sensors are introduced as intermediary detection devices between the pump system and the patient line. These sensors act as mediators that convert physical occlusion conditions into measurable pressure signals, enabling the control unit to detect occlusions without manual intervention while preserving automated treatment efficiency.
2Ease of operation
If manual occlusion detection methods are used, then detection simplicity is maintained, but treatment interruptions increase
Solution Approach 1:
The system implements self-service occlusion detection through automated pressure monitoring by sensors and algorithmic analysis by the control unit. The system detects and identifies occlusions autonomously without requiring patient or operator intervention, eliminating treatment interruptions while maintaining operational simplicity.
Solution Approach 2:
The system establishes a continuous feedback loop where pressure sensors continuously monitor line pressure, the control unit analyzes pressure differentials, and the system automatically responds to detected occlusions. This closed-loop feedback mechanism enables real-time occlusion detection without manual checks, preventing treatment interruptions.
3Reliability
If pressure sensors are installed in the patient line, then occlusion detection capability is improved, but device complexity increases
Solution Approach 1:
The pressure sensors serve multiple functions: detecting occlusions, monitoring patient pressure, and providing flow rate verification. The control unit uses pressure differential data for both occlusion detection and treatment parameter verification. This multi-functionality justifies the added complexity by providing comprehensive monitoring capabilities from a single sensor installation.
Solution Approach 2:
The system merges occlusion detection functionality with the existing automated dialysis control unit. Rather than creating a separate detection system, the occlusion detection algorithms are integrated into the control unit that already manages pump operation and treatment parameters. This consolidation reduces overall system complexity while maintaining reliable occlusion detection.
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
Enables accurate and automated occlusion detection, reducing treatment interruptions and enhancing patient convenience by minimizing manual intervention.
Implementation Method 1
a fill pressure sensor configured to detect PD fluid pressure in the fill lumen of the dual lumen patient line; a return pressure sensor configured to detect PD fluid pressure in the return lumen of the dual lumen patient line
Data Source
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AI summary
A peritoneal dialysis ("PD") system includes a housing; a PD fluid pump housed by the housing; a dual lumen patient line extending from the housing, the dual lumen patient line including a fill lumen and a return lumen; a PD fluid fill line in fluid communication with the fill lumen and an outlet of the PD fluid pump; a PD fluid return line in fluid communication with the return lumen and an inlet of the PD fluid pump; a fill pressure sensor configured to detect PD fluid pressure along the PD fluid fill line; a return pressure sensor configured to detect PD fluid pressure along the PD fluid return line; and a control unit configured to use outputs from the fill and return pressure sensors to determine if one of the fill lumen or the return lumen of the dual lumen patient line is occluded.