Automated DBS Extraction System with Optical Recognition
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Solution Overview
Problem
Current methods for analyzing dried biological samples, such as Dried Blood Spots (DBS) and Dried Matrix Spots (DMS), are time-consuming and labor-intensive, lacking automation, which hinders efficient processing and analysis of large sample volumes, especially in drug screening and clinical examinations.
Innovation Solution
A fully automated system utilizing a robotics-based gripper and optical recognition system for precise handling and extraction of DBS/DMS cards, coupled with a Dried Matrix Spot Mass Spectrometer (DMS-MS) for direct and efficient analysis, eliminating manual intervention and enhancing sensitivity and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual extraction and analysis methods are used for DBS/DMS samples, then operational flexibility is maintained, but productivity is low and time consumption is high
Solution Approach 1:
The system enables self-service automation where the robotic device autonomously performs sample extraction, transfer, and analysis without human intervention. The automated liquid handling system independently manages solvent delivery, extraction, and waste removal, eliminating the need for manual operation while significantly increasing productivity.
Solution Approach 2:
Manual mechanical operations are replaced with an automated robotic system that uses programmed mechanical movements for sample handling. The robotic arm with specialized grippers substitutes human hands, while automated liquid handling systems replace manual pipetting, achieving high-speed processing without sacrificing precision.
2Productivity
If automated extraction systems are implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The robotic system is designed with multi-functionality to handle various sample types (DBS, DMS, different matrices) and extraction protocols using the same core platform. The universal gripper design and programmable control allow the system to perform multiple operations (extraction, transfer, cleaning) without requiring separate specialized equipment for each function.
Solution Approach 2:
The system employs a nested structure where the robotic gripper contains the extraction chamber, which in turn contains the sample substrate. The liquid handling system is integrated within the robotic arm structure, and the entire extraction assembly is housed within the analytical instrument housing, creating a compact nested configuration that reduces space requirements despite high functionality.
3Measurement precision
If manual sample handling is used, then device complexity is low, but measurement precision and reliability are reduced
Solution Approach 1:
The system incorporates feedback mechanisms where sensors monitor sample position, liquid volume, and extraction progress in real-time. The robotic control system receives feedback from position encoders and force sensors to adjust movements and maintain precise sample handling. Analytical instruments provide feedback on sample quality to optimize extraction parameters dynamically.
Solution Approach 2:
The system creates digital copies of sample positions and characteristics through optical scanning and imaging systems. These digital representations are used to plan and execute precise robotic movements, ensuring accurate sample identification and handling without physical contact until the extraction phase, thereby maintaining precision while reducing contamination risk.
4Productivity
If high-volume sample analysis is performed, then productivity increases, but loss of time for setup and operation increases
Solution Approach 1:
The system performs preliminary actions by pre-positioning samples in accessible locations, pre-programming extraction protocols, and pre-loading solvents before analysis begins. The robotic system is pre-calibrated with sample positions identified through preliminary scanning, and extraction parameters are pre-optimized based on sample type, eliminating setup time during high-volume operation sequences.
Solution Approach 2:
The system maintains continuous useful action through uninterrupted automated operation where the robotic arm continuously transfers samples, the liquid handling system continuously delivers solvents, and the analytical instrument continuously processes data. The system is designed to operate in continuous cycles without idle periods, with automatic sample loading and waste removal ensuring that useful action persists throughout the entire analysis sequence.
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 rapid, reliable, and reproducible analysis of hundreds of samples without human interaction, reducing errors and costs, while improving detection sensitivity and sample identification, thus supporting the widespread adoption of DBS technology in pharmacology and toxicology.
Implementation Method 1
a measuring head (100) for optical recognition of the DBS cards and the samples (11)
Implementation Method 2
The samples (11) are thus spatially tightly enclosed and the desired substances are then extracted from the sample by a liquid being supplied via an inlet line, flowing through the sample and flowing out via an outlet line
Implementation Method 3
Direct coupling to the mass spectrometer (MS) is therefore of great interest for the blood analysis industry
Data Source
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Figure 3~4
AI summary
A fully automatic extraction and analysis system for biologically active samples significantly simplifies the analysis of, for example, DMS samples and has significant advantages over the manual technology and the partially automated technology (punching out). The described extraction system is the first economical alternative to conventional blood analysis and supports the spread of said time-, cost-, and animal-saving technology in pharmacology and toxicology.