Peritoneal Dialysis Line Occlusion Detection via Pressure Profile Analysis
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Solution Overview
Problem
Existing peritoneal dialysis systems lack effective occlusion detection and intra-peritoneal pressure estimation, leading to inefficiencies and potential complications during treatment.
Innovation Solution
A peritoneal dialysis system with integrated pressure sensors and a control unit that analyzes pressure profiles to detect line occlusions and estimate intra-peritoneal pressure, using a dual lumen patient line with a disposable filter set and hydrophobic vents to enhance detection accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peritoneal dialysis systems operate without integrated pressure sensors and occlusion detection, then the device complexity is reduced, but the reliability and safety of treatment are compromised due to inability to detect line blockages and monitor intra-peritoneal pressure
Solution Approach 1:
The system employs pressure sensors to continuously monitor pressure profiles in the peritoneal dialysis line and provides feedback to the control unit. When an occlusion is detected through analysis of pressure profile changes, the system automatically responds by stopping the pump and alerting the user, creating a closed-loop feedback mechanism that enhances reliability without requiring complex additional hardware
Solution Approach 2:
Pressure sensors act as intermediaries between the peritoneal dialysis line and the control system. These sensors translate physical pressure conditions into electrical signals that can be processed by the control unit, enabling indirect detection of occlusions and intra-peritoneal pressure without direct intervention in the dialysis flow path
2Productivity
If manual peritoneal dialysis is used, then the device complexity is reduced, but the productivity and treatment efficiency are compromised due to significant time and effort required from the patient
Solution Approach 1:
The automated peritoneal dialysis system performs dialysis treatments automatically without requiring manual intervention from the patient. The system independently manages fluid exchange, monitors pressure profiles, detects occlusions, and alerts users, enabling patients to maintain productivity while receiving efficient dialysis treatment
Solution Approach 2:
The system replaces manual mechanical operations with automated electronic control. The control unit uses pressure sensor data and programmed algorithms to automatically detect occlusions and manage the dialysis process, substituting patient manual labor with electronic monitoring and automated response mechanisms
3Measurement precision
If pressure sensors are integrated into the peritoneal dialysis line, then the measurement precision of intra-peritoneal pressure is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The pressure sensors serve multiple functions: monitoring intra-peritoneal pressure, detecting line occlusions, and providing feedback for pump control. This multi-functionality justifies the added manufacturing complexity by delivering multiple clinical benefits through a single sensor integration approach
Solution Approach 2:
The system analyzes changes in pressure profile parameters (magnitude, rate of change, temporal patterns) to detect occlusions and monitor pressure. By focusing on parameter transformations rather than requiring complex sensor arrays, the system achieves precise measurement while controlling manufacturing 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
The system provides rapid and reliable occlusion detection, improving treatment efficiency and safety by preventing line blockages and allowing for precise intra-peritoneal pressure monitoring.
Implementation Method 1
A pressure sensor is positioned and arranged to sense the upstream pressure profile and to produce an output indicative of the upstream pressure profile
Implementation Method 2
A PD fluid pump is configured to pump PD fluid along a line under an upstream pressure
Implementation Method 3
a control unit configured to analyze the output indicative of the upstream pressure profile and to determine that an occlusion in the line has occurred
Data Source
AI summary
A peritoneal dialysis (“PD”) system includes a PD fluid pump configured to pump PD fluid along a line under negative pressure and to create a negative pressure profile having a maximum negative pressure and a minimum negative pressure; a pressure sensor positioned and arranged to sense the negative pressure profile and to produce an output indicative of the negative pressure profile including a maximum negative pressure output and a minimum negative pressure output; and a control unit configured to analyze the output indicative of the negative pressure profile and to determine that an occlusion in the line has occurred if both the maximum negative pressure output and the minimum negative pressure output change by at or more than a set pressure delta, wherein the set pressure delta is optionally the same pressure delta for the maximum negative pressure output and the minimum negative pressure output.