Actuated Micropost Arrays for Biofluid Rheology Assessment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for measuring biofluid rheology, such as thromboelastography and point-of-care technologies, are limited by low throughput, sensitivity, and the need for macroscopic specimen quantities, making them inadequate for high-speed and quantitative analysis of biofluid properties like clot elasticity.
Innovation Solution
The use of surface-attached actuated microposts, which apply actuation forces to flexible micropost arrays to measure the viscoelastic properties of biofluids by detecting the motion of microposts in response to applied forces, allowing for the determination of properties like clotting characteristics and rheological properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laboratory techniques such as thromboelastography are used to measure biofluid rheology, then measurement precision and sensitivity are improved, but productivity deteriorates because tests must be performed essentially one at a time
Solution Approach 1:
The invention divides the measurement system into multiple parallel micropost arrays, each capable of independent operation. This segmentation allows simultaneous measurement of multiple samples or repeated measurements on the same sample, transforming a sequential testing process into a parallel one, thereby improving productivity without compromising measurement precision
Solution Approach 2:
The invention transitions from macroscopic measurement geometries (concentric cylinders) to microscopic-scale micropost arrays. This dimensional change enables high-throughput capability while maintaining sensitivity, as the microposts can be arranged in dense arrays that allow parallel processing of multiple measurements simultaneously
2Productivity
If point of care technologies are used for rapid measurement, then productivity is improved, but measurement precision and sensitivity deteriorate
Solution Approach 1:
The invention replaces traditional mechanical shear measurement systems with a magnetic actuation and optical detection system. Magnetic microposts are actuated by magnetic fields and their motion is detected optically, enabling rapid measurement while maintaining the sensitivity and precision of laboratory-grade analysis. This substitution allows the system to achieve both high productivity and high measurement precision simultaneously
3Reliability
If macroscopic quantities of specimens are used for laboratory analysis, then measurement reliability is improved, but loss of substance increases
Solution Approach 1:
The invention employs micropost arrays with extremely thin post structures that can be actuated and detected with minimal specimen volume. The flexible micropost structure allows for effective mechanical coupling with small amounts of biofluid, enabling reliable measurements while minimizing the quantity of specimen required. This approach dramatically reduces sample consumption compared to traditional macroscopic methods
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
This approach enables high-throughput, sensitive, and quantitative assessment of biofluid properties, potentially replacing laboratory tests with a more efficient and portable method, suitable for both point-of-care and laboratory settings.
Implementation Method 1
The viscoelasticity of biofluids, such as blood clots or mucus, is critical to their performance. Measurement of viscoelastic properties of these fluids can provide valuable information to medical professionals
Implementation Method 2
Another technology uses magnetic beads that become suspended in the developing clot, and the beads are caused to move through the application of a magnetic field
Implementation Method 3
The detection of the moving beads is performed by optics, and the cessation of the bead movement is an indication that the clot has formed
Data Source
Figure 1A(1)~1A(3)
Figure 1B(4)~1B(7)
Figure 1C(1)~1C(5)
AI summary
Methods, systems, and computer readable media for using actuated surface-attached posts for assessing biofluid rheology are disclosed. According to one aspect, a method for testing properties of a biofluid specimen includes placing the specimen onto a micropost array having a plurality of microposts extending outwards from a substrate, wherein each micropost includes a proximal end attached to the substrate and a distal end opposite the proximal end, and generating an actuation force in proximity to the micropost array to actuate the microposts, thereby compelling at least some of the microposts to exhibit motion. The method further includes measuring the motion of at least one of the microposts in response to the actuation force and determining a property of the specimen based on the measured motion of the at least one micropost.