Piezoelectric Transducer for Continuous EHT Contraction Measurement
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Solution Overview
Problem
Current methods for measuring contraction characteristics of engineered heart tissue constructs are laborious, error-prone, and unsuitable for simultaneous analysis of multiple samples, lacking the ability to perform continuous and cost-effective measurements necessary for effective drug screening and tissue implantation assessment.
Innovation Solution
A method involving mechanical coupling of engineered heart tissue constructs to support elements with integrated piezoelectric elements, allowing for direct and continuous measurement of contraction forces, enabling real-time data collection and analysis of multiple constructs simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual fixation of EHTs to force transducers in an organ bath is used, then contraction force can be measured, but the method is laborious and error-prone and does not allow simultaneous analysis of multiple samples
Solution Approach 1:
The measurement system is segmented into multiple independent measurement channels, each with its own force transducer and organ bath well. This allows simultaneous measurement of multiple EHT constructs without requiring manual transfer or complex multi-sample handling procedures, thereby increasing throughput while maintaining operational simplicity
Solution Approach 2:
A microhook is introduced as an intermediary element that simplifies the attachment process. The microhook serves as a standardized interface between the EHT construct and the force transducer, enabling easy and reproducible fixation without requiring complex manual manipulation or specialized skills, thus improving both throughput and ease of operation
2Productivity
If EHTs are manually fixed to force transducers, then contraction characteristics can be assessed, but the process is time-consuming and not suitable for high-throughput screening
Solution Approach 1:
The force transducers are pre-mounted in the organ bath wells and the measurement system is prepared in advance. EHT constructs are cultured in the same wells where they will be measured, eliminating the need for manual transfer and setup time. The microhook attachment is designed for rapid fixation, enabling high-throughput screening with minimal measurement time
Solution Approach 2:
The system is designed to minimize manual intervention. Once the EHT construct is attached to the microhook, the measurement process proceeds automatically with continuous force recording. The system self-regulates the measurement parameters and data collection, reducing time loss and enabling unattended operation for multiple samples simultaneously
3Productivity
If continuous measurement of multiple EHT constructs is required, then drug screening efficiency improves, but the complexity of the measurement system increases
Solution Approach 1:
The force transducers and organ bath wells are designed as universal, standardized components that can be used for both EHT construction and continuous measurement without modification. The microhook serves as a universal attachment mechanism compatible with all transducers. This multi-functionality allows continuous measurement of multiple constructs simultaneously while keeping the system design simple and modular
Solution Approach 2:
The measurement system uses identical copies of force transducers and organ bath wells for each measurement channel. This replication of standardized components enables simultaneous measurement of multiple EHT constructs without increasing the complexity of individual measurement units. The modular copied design simplifies system expansion and maintenance while maintaining high screening efficiency
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
Facilitates efficient, automated, and cost-effective measurement of contraction characteristics, reducing data volume and analysis time, while allowing for the assessment of multiple constructs of varying geometries over extended periods.
Implementation Method 1
each first support element comprises or is mechanically coupled to at least one piezoelectric element which forms a sensing element of a piezoelectric transducer
Data Source
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AI summary
The invention is directed to a novel method for measuring contraction characteristics of engineered heart tissue constructs (16) which is based on the mechanical coupling of the construct (16) to a support element (8) which comprises or is mechanically coupled to a piezoelectric element (10). An apparatus (1) for carrying out the method of the invention is also provided.