Thrombelastography Device Rotating Test Bar Optical Detection
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Solution Overview
Problem
Current thrombelastography devices lack high measurement precision in evaluating blood coagulation and fibrinolysis, particularly in reflecting the dynamic changes of blood coagulation processes relevant for cardiovascular and cerebrovascular disease diagnosis.
Innovation Solution
A thrombelastography device with a rotating test bar and position correction mechanism, combined with a heating apparatus for temperature control, uses light emission and reception to accurately measure blood coagulation parameters by analyzing changes in light reflection from a reflective surface, ensuring high precision in coagulation analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional thrombelastography device measures only time segments of blood coagulation, then the device structure is simple, but the measurement precision and ability to reflect dynamic changes in blood coagulation are insufficient
Solution Approach 1:
The patent replaces conventional mechanical time-segment measurement with an optical detection system. A light emitting device emits light that reflects off a reflective surface on the test bar, and a light receiving device detects the reflected light. The intensity of reflected light changes with the rotational angle of the test bar, providing high-precision measurement of blood coagulation dynamics without complex mechanical timing mechanisms.
Solution Approach 2:
The patent changes the measurement parameter from time segments to rotational angle. The test bar rotates as blood coagulates, and the rotational angle is measured through optical reflection principles. This parameter transformation enables continuous, high-precision monitoring of the entire coagulation and fibrinolysis process, capturing dynamic changes that time-segment methods miss.
2Measurement precision
If the test bar rotates to measure blood coagulation dynamics, then the measurement accuracy improves, but the position stability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism using a position correction device with a hair spring. The hair spring connects the test bar to the rack and automatically corrects positional deviations of the test bar during rotation. This feedback system maintains position stability while allowing the test bar to rotate for measuring coagulation dynamics, resolving the contradiction between measurement accuracy and position stability.
3Measurement precision
If temperature control is added to the thrombelastography device, then the blood coagulation analysis accuracy improves, but the device complexity increases
Solution Approach 1:
The heating apparatus serves multiple functions: it heats the blood sample to maintain physiological temperature for accurate coagulation analysis, and it can be integrated with the existing thrombelastography device structure. This multi-functionality approach adds temperature control capability without proportionally increasing device complexity, as the heating system shares space and control infrastructure with other device 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
The device achieves high accuracy in evaluating blood coagulation by accurately measuring changes in light reflection due to the rotating test bar and temperature control, providing objective guidance for clinical diagnosis of cardiovascular and cerebrovascular diseases.
Implementation Method 1
a light emitting device and a light receiving device are arranged inside the at least two second through holes respectively, the light emitting device is able to emit light to the reflective surface, and the light receiving device is able to receive light reflected by the reflective surface
Implementation Method 2
the position correction device comprises at least one hair spring, wherein an inner ring of each of the hair springs is fixedly connected to the outer circumferential surface of the test bar, and an outer ring of each of the hair spring is fixedly connected to the rack, and the position correction device is used for generating, when the test bar rotates away from a balanced position, an acting force for rotating the test bar back to the balanced position
Implementation Method 3
at least one heater which is in contact with the container and used for heating the liquid in the container
Data Source
AI summary
A thrombelastography device, a heating apparatus, a blood coagulation analysis system, and a rotational angle measurement method are disclosed. The thrombelastography device consists of a plurality of thrombelastography device splits (2) that are horizontally arranged in parallel. The thrombelastography device split (2) comprises a worktable (4), a rack (5), a test bar (6), a tester (8), and a processor (9). The thrombelastography device overcomes the defect in the prior art that the measurement result of a thrombelastography device is inaccurate. The amount of reflected light is used as a reference for thrombelastographic evaluation, and thus the result is more accurate.