Automated Clinical Specimen Sampling with Spacer Fluid
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Solution Overview
Problem
Current methods for collecting and storing clinical specimens are manual, time-consuming, expensive, and limited in frequency and scope, leading to inefficiencies and reduced credibility of clinical trial results, particularly in community hospitals where standardized tools are lacking.
Innovation Solution
An automated system using microfluidic tubing with a pump and immiscible spacer fluid for continuous sample collection and storage, integrated with sensors and a microcontroller for data logging and analysis, enabling multiple sample collection from various body sites over extended periods while preventing contamination and allowing for real-time data analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual collection methods are used, then flexibility in collection techniques is maintained, but collection efficiency and productivity are severely limited
Solution Approach 1:
The system enables self-service through automated sampling where the robotic arm autonomously positions and operates sampling devices, the microfluidic system automatically transports and processes samples, and the data collection system automatically records and manages clinical information without requiring manual intervention for each sampling operation.
Solution Approach 2:
Manual mechanical sampling operations are replaced with an automated robotic system that uses computer-controlled mechanical arms for precise positioning and operation of sampling devices, microfluidic pumps for automated fluid transport, and electronic sensors for automatic data capture, thereby dramatically improving collection efficiency.
2Quantity of substance
If frequent sampling is performed manually, then more data points are obtained, but time consumption and labor costs increase significantly
Solution Approach 1:
The system achieves continuous sampling through automated operations where the robotic arm continuously positions sampling devices, the microfluidic system continuously transports samples through integrated channels, and the data system continuously records information, eliminating idle time between samples and enabling high-frequency data collection over extended periods.
Solution Approach 2:
The system performs preliminary actions by pre-positioning multiple sampling devices, pre-configuring microfluidic pathways, and pre-programming sampling schedules before actual sample collection begins, allowing immediate execution of sampling sequences without setup delays for each individual sample.
3Adaptability or versatility
If multiple body sites are sampled manually, then comprehensive data is collected, but complexity of coordination and contamination risk increase
Solution Approach 1:
The system achieves universality through a modular robotic platform that can perform multiple sampling functions using different specialized devices (needles, catheters, microdialysis probes) mounted on the same robotic arm, with a unified control system that manages all sampling operations across various body sites through standardized interfaces and protocols.
Solution Approach 2:
The system divides the complex sampling task into segmented operations where the robotic arm independently positions and operates different sampling devices for different body sites, with separate microfluidic pathways for each sample type, and dedicated data collection modules for each sensor, thereby managing complexity through modular organization.
4Reliability
If standardized collection methods are implemented, then data quality and reliability improve, but adaptability to different local practices is reduced
Solution Approach 1:
The system enables parameter changes by allowing configuration of sampling frequencies, volumes, and timing intervals to match different clinical protocols and patient needs, while maintaining standardized core operations, thereby adapting to various local practices and hospital capabilities without compromising data quality or reliability.
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 enables efficient, high-volume, and high-frequency sample collection and storage, reducing costs and labor, improving data quality, and enhancing the applicability of clinical trial results to community-based clinicians by automating the process and integrating with existing medical records and analytic techniques.
Implementation Method 1
A pump, for example a roller pump, moves the sample through the tubing.
Implementation Method 2
an immiscible spacer fluid for continuous sample collection and storage
Data Source
AI summary
A system and method are described that allow the autonomous collection of relevant data and samples from a patient during a clinical trial or during routine care. Sampling is accomplished by drawing multiple samples into tubing, such as microfluidic tubing, and using a pump to move the samples through the tubing. A spacer fluid is provided to separate each sample and to prevent contamination between each. A microcontroller is used to control the operation of the pump and to gather data about the patient from the electronic medical record or other alternative inputs, and the sampling, including data from onboard sensors.