Thromboelastic Analyzer Layout With Capacitive Clot Detection
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Solution Overview
Problem
Current thromboelastometric measurement devices face challenges with decreased signal-to-noise ratios and measurement accuracy, particularly in diluted or pre-treated blood samples, due to increased sensitivity to dust, aging effects, and weight load on bearings, leading to reduced diagnostic reliability and increased maintenance costs.
Innovation Solution
The design of a thromboelastic measurement apparatus with rotating means positioned below the cup and pin, reducing weight load and friction, combined with capacitive detection methods and a compact temperature control unit, enhances measurement accuracy and robustness while minimizing contamination sensitivity and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If rotating means are positioned above the cup and pin, then the apparatus structure is simplified, but weight load on bearings increases and measurement precision decreases
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the rotating means (motor and bearings) below the cup and pin assembly rather than above. This inversion reduces the weight load on the bearings that support the pin, thereby improving measurement precision while maintaining structural simplicity through the reconfigured layout
2Measurement precision
If optical detection means are used, then measurement capability is achieved, but sensitivity to dust and contamination increases
Solution Approach 1:
The patent replaces the optical detection system with a capacitive detection system. The capacitive sensors detect pin position through electrical fields rather than optical means, making the detection process insensitive to dust and contamination while maintaining accurate measurement capability
3Ease of manufacture
If standard bearing support is used, then manufacturing cost is reduced, but friction increases and measurement accuracy decreases
Solution Approach 1:
The patent extracts the rotating means (motor and bearings) from the upper support structure and relocates them to a lower position. This separation reduces the weight load on the bearings that support the pin, thereby reducing friction and improving measurement accuracy while using standard bearing components
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 configuration improves measurement precision, allowing for accurate evaluation of diluted or pre-treated blood samples with reduced variability, increased reliability, and extended apparatus lifespan, while maintaining usability and reducing service efforts.
Implementation Method 1
capacitive detection means for detecting variations in a rotation around a vertical axis caused by blood coagulation, comprising a rotatable capacitor element capable of rotating around the vertical axis, at least one fixed capacitor element, and an electrical circuit
Implementation Method 2
The design of a thromboelastic measurement apparatus with rotating means positioned below the cup and pin, reducing weight load and friction
Implementation Method 3
a compact temperature control unit, enhances measurement accuracy and robustness
Data Source
AI summary
An apparatus is for use in viscoelastic analysis, for example in coagulation testing of sample liquids, such as blood and/or its elements. In the apparatus for use in viscoelastic analysis, the rotating means are provided below the cup, pin and cup receiving element. A capacitive detection means and temperature control devices may be used in the apparatus for use in viscoelastic analysis. A method of performing viscoelastic analysis, e.g. coagulation analysis, on a sample may use the devices and apparatuses.