Fluidic Assay Supports for Time-Domain Multiplex Decoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bead-based multiplexed diagnostics methods face limitations in the number of multiplexing levels due to the need for well-resolved spectral properties of encoding dyes, requiring costly equipment and limiting detection speed.
Innovation Solution
Employ time-domain decoding methods that utilize encoding agents with similar spectral properties but different stabilities, allowing for physical and chemical changes in response to defined events to distinguish populations, without the need for additional optical filters or costly equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional spectral decoding methods are used with multiple dyes at different intensity levels, then multiple analytes can be detected, but the number of multiplexing levels is limited and costly equipment is required
Solution Approach 1:
The patent changes the decoding parameter from spectral properties to temporal stability. Encoding agents with different photostabilities are used, and decoding is achieved by measuring fluorescence intensity changes over time during photobleaching. This allows multiple multiplexing levels to be distinguished using a single optical filter, dramatically reducing equipment complexity while increasing adaptability for multiplexed detection
Solution Approach 2:
The patent transitions from spectral dimension decoding (different wavelengths) to temporal dimension decoding (different time behaviors during photobleaching). By measuring fluorescence intensity as a function of time during controlled photobleaching, the system extracts multiple encoding states from encoding agents that would appear identical in static spectral measurements, effectively adding a temporal dimension to the decoding process
2Adaptability or versatility
If multiple encoding dyes with different spectral properties are used, then multiplexing can be achieved, but detection speed is reduced and equipment cost increases
Solution Approach 1:
The patent employs periodic illumination to induce controlled photobleaching of encoding agents. By applying light in periodic pulses and measuring fluorescence intensity changes during each pulse cycle, the system rapidly decodes multiple multiplexing levels through temporal analysis of photobleaching kinetics, significantly increasing detection speed compared to static spectral measurements
Solution Approach 2:
The patent maintains continuous monitoring of fluorescence intensity during the photobleaching process, extracting decoding information from the entire temporal trajectory of intensity changes rather than relying on discrete spectral snapshots. This continuous measurement approach maximizes information extraction from each encoding agent, improving detection speed and efficiency
3Measurement precision
If encoding agents with different intensity levels are used, then bead populations can be distinguished, but spectral resolution requirements increase and practical upper limits are reached
Solution Approach 1:
The patent changes the measurement parameter from static fluorescence intensity to dynamic photobleaching rate. By monitoring how fluorescence intensity changes over time during controlled photobleaching, the system can distinguish encoding agents with similar initial intensities based on their different decay kinetics, eliminating the need for high spectral resolution while maintaining precise bead population distinction
Solution Approach 2:
The patent transitions from static intensity measurement to dynamic temporal analysis. Encoding agents are differentiated by their time-dependent fluorescence decay characteristics during photobleaching rather than by their steady-state intensity levels. This dynamic approach allows precise distinction of multiple bead populations without requiring high spectral resolution, as the temporal evolution of fluorescence provides additional discriminatory information
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
Increases multiplexing capabilities by resolving more distinct encoding states, enhancing detection speed and efficiency with a low-cost analytical platform.
Implementation Method 1
encoding agents with similar spectral properties but different stabilities, allowing for physical and chemical changes in response to defined events
Implementation Method 2
encoding agents with similar spectral properties but different stabilities, allowing for physical and chemical changes in response to defined events
Implementation Method 3
beads functionalized with biorecognition elements (such as antibodies, oligonucleotides, etc.)
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Decoding methods are provided for identifying populations in assays, particularly multiplexing assays and those associated with fluidic devices.