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Updated: Jun 5, 2026
08:50
Thrombus Profiling Assay: A Microfluidics-Based Platform for Comprehensively Characterizing Biomechanical Thrombogenesis
Published on: January 9, 2026
[The effect of changing body posture on thrombin activity and concentration]
Su-Zhen Li1, Ling-Fei Lu, Li-Ming Zhang
1Taizhou Central Hospital, Taizhou 318000, China.
Summary
Changing body position significantly alters thrombin activity, impacting coagulation tests like fibrinogen (FIB) and prothrombin time (PT). These variations are crucial for evidence-based medicine and quality control in laboratory diagnostics.
Area of Science:
- Biomedical Science
- Physiology
- Clinical Chemistry
Context:
- Thrombin activity plays a critical role in hemostasis and is a key indicator in coagulation testing.
- Standardized laboratory procedures are essential for accurate diagnostic interpretation.
- Understanding physiological variations is vital for evidence-based medicine and quality assurance.
Purpose:
- To investigate the impact of body position on thrombin activity measurements.
- To assess the physiological variations in coagulation parameters due to posture changes.
- To provide data for improving the reliability of thrombin activity testing.
Summary:
- Blood samples from 105 volunteers were analyzed for thrombin activity in both standing and lying positions across different seasons.
- Significant variations (P < 0.01) were observed in coagulation indices, with fibrinogen (FIB), thrombin time (TT), and activated partial thromboplastin time (APTT) increasing, while prothrombin time (PT) and international normalized ratio (INR) decreased.
- These postural changes affected thrombin activity, with values returning to near baseline after sitting, highlighting physiological variability.
Impact:
- Body position changes can cause significant physiological variations in thrombin activity, affecting coagulation test results.
- Awareness of these postural effects is essential for accurate interpretation of coagulation diagnostics.
- This research contributes to enhancing quality control and evidence-based practices in clinical laboratories.
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