Microfluidic Chip Automates Nested PCR Analysis
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Solution Overview
Problem
Conventional nucleic acid detection methods using nested polymerase chain reactions are inefficient and prone to DNA contamination and pipetting errors, requiring manual intervention and resulting in longer process times and higher costs.
Innovation Solution
A microfluidic chip with fluidically connected reaction chambers allows for automated nested polymerase chain reactions, enabling spatial separation of PCR steps and simultaneous detection of multiple DNA sequences without manual handling, reducing contamination risks and personnel costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual distribution of PCR products to reaction chambers is performed, then flexibility in detecting different target sequences is maintained, but process time increases and risk of DNA contamination and pipetting errors occurs
Solution Approach 1:
The system performs automated self-service through the controller that automatically distributes PCR products from the first reaction chamber to multiple second reaction chambers based on pre-programmed protocols, eliminating manual intervention and reducing both contamination risk and process time
Solution Approach 2:
Manual mechanical pipetting operations are replaced by an automated fluid distribution system controlled by a controller, which uses electronic control signals to manage fluid transfer, thereby eliminating human error and reducing process time
2Measurement precision
If multiple PCR reactions are performed in separate manual steps, then detection precision for different target sequences is maintained, but personnel costs and process complexity increase
Solution Approach 1:
Multiple separate PCR reaction processes are merged into a single integrated system where the first reaction chamber and multiple second reaction chambers are connected through fluid channels, allowing automated sequential processing that maintains detection precision while reducing operational complexity
Solution Approach 2:
The analysis unit is designed with multi-functionality to perform different nested PCR protocols for detecting various target sequences using the same physical apparatus, with the controller adapting reaction parameters and fluid distribution patterns to maintain precision across different applications
3Productivity
If manual intervention is used for distributing PCR products, then adaptability to different detection protocols is maintained, but productivity decreases and costs increase
Solution Approach 1:
The system incorporates dynamic adaptability where the controller can be programmed with different protocols for distributing PCR products to various second reaction chambers, allowing the same physical system to adapt to different detection requirements while maintaining automated high-speed operation
Solution Approach 2:
The system achieves adaptability through parameter changes in the control software, which adjusts fluid distribution patterns, timing, and reaction conditions to match different detection protocols, thereby maintaining both productivity and versatility
Data Source
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AI summary
The invention relates to an analysis unit (100) for performing a nested polymerase chain reaction (200). Said analysis unit (100) comprises at least one preparation chamber (105) for obtaining a fluid by means of a first polymerase chain reaction, and at least one evaluation structure (110) for evaluating the fluid by means of a second polymerase chain reaction. The evaluation structure (110) is or can be fluidically connected to the preparation chamber (105). The evaluation structure (110) further comprises at least two segmental chambers (115) which are fluidically connected in parallel.