Peritoneal Effluent Optical Detection for Early Peritonitis Diagnosis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting peritonitis in patients undergoing peritoneal dialysis are often delayed, relying on clinical symptoms and laboratory tests, which can lead to undue patient distress and potentially more extensive treatment, as existing automated systems for early detection have proven unreliable due to poor signal-to-noise issues.
Innovation Solution
An automated medical testing system that uses an illumination source and detector to analyze the optical characteristics of peritoneal effluent at a cellular scale, distinguishing white blood cells and other components, and signaling the onset of peritonitis through changes in cell counts or trends over time, utilizing a laser diode, pin diode, or charge-coupled device for accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If automated optical detection is used to detect peritonitis early, then detection timing is improved, but reliability deteriorates due to poor signal-to-noise ratio
Solution Approach 1:
The effluent flow path is divided into discrete detection zones within the chamber, allowing the optical system to focus on specific regions where cellular components are most concentrated. This segmentation enables targeted measurement of scattering signals from white blood cells while minimizing background noise from other effluent components.
Solution Approach 2:
The patent introduces optical scattering as an intermediary mechanism to detect white blood cells. Rather than directly observing cellular properties, the system measures how cells scatter light, providing an indirect but reliable signal that amplifies the detectability of early-stage cellular changes while filtering out unrelated background interference.
2Measurement precision
If light scattering detection is used to detect cellular components, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The optical detection system is designed to perform multiple functions: detecting white blood cells, monitoring effluent flow characteristics, and identifying turbidity changes. This multi-functionality reduces the need for separate specialized sensors and simplifies the overall device architecture while maintaining cellular-scale measurement precision.
Solution Approach 2:
The effluent chamber structure itself serves dual purposes: it guides fluid flow and simultaneously acts as the detection region for optical measurements. The chamber's geometric features (such as tapered sections and defined flow paths) naturally concentrate cellular components in measurement zones, eliminating the need for additional mechanical manipulation devices.
3Measurement precision
If effluent is monitored continuously for turbidity, then detection accuracy is improved, but ease of operation deteriorates for blind or visually impaired patients
Solution Approach 1:
The patent replaces manual visual inspection with automated optical sensing. The mechanical/optical detection system continuously measures light scattering properties of effluent, converting physical measurements into electrical signals that can be processed and displayed. This substitution eliminates the need for patients to visually assess turbidity while maintaining high detection accuracy.
Solution Approach 2:
The system incorporates continuous feedback through automated monitoring and alert mechanisms. When cellular counts or optical properties indicate early signs of peritonitis, the system generates alerts or notifications to healthcare providers, creating a closed-loop feedback system that maintains high detection accuracy while requiring minimal patient intervention.
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 early and accurate detection of peritonitis, reducing patient distress and treatment complexity by providing real-time monitoring of peritoneal effluent, thereby facilitating timely intervention.
Implementation Method 1
The source is arranged to illuminate peritoneal effluent in a chamber that forms part of the flow path, and the detector is arranged to detect illuminant scattered by the effluent. The detector detects that scattered illuminant at a cellular scale of resolution
Data Source
Figure 1A~1E
Figure 2A~2C
Figure 3A~3A1
AI summary
The invention provides, inter alia, automated medical methods and apparatus that test PD effluent in a flow path (e g, with an APD system or CAPD setup) to detect, for example, the onset of peritonitis, based on optical characteristics of the effluent resolved at cellular scales of distance For example, according to one aspect of the invention, an APD machine includes, in an effluent flow path, apparatus for early stage peritonitis detection comprising an illumination source and a detector The source is arranged to illuminate peritoneal effluent in a chamber that forms part of the flow path, and the detector is arranged to detect illuminant scattered by the effluent.