An automated method for fibrin clot permeability assessment

Area of Science:

• Biomedical Engineering
• Hematology
• Biophysics

Background:

• Fibrin clot permeability coefficient (Ks) is a key indicator of fibrin network porosity.
• Current methods for evaluating Ks are labor-intensive, time-consuming, and provide limited data.
• Understanding factors influencing Ks is crucial for various physiological and pathological conditions.

Purpose of the Study:

• To develop and validate an automated method for measuring the fibrin clot permeability coefficient (Ks).
• To assess the correlation between the automated method and existing manual techniques for Ks measurement.
• To identify additional parameters derived from the automated method that describe fibrin clot structure.

Main Methods:

• An automated system was developed involving individual drop weighing, precise buffer dosing, and software-controlled clot washing.
• The method utilizes the linear relationship between drop mass and dripping time to reduce measurement duration.
• The study involved 40 healthy individuals, measuring Ks, drops to plateau (DTP), time to plateau (TTP), and DTP/TTP ratio (DTR).

Main Results:

• A strong positive correlation (r=0.69) was observed between Ks values obtained from the automated and manual methods.
• The automated method demonstrated higher correlation (r=0.85) in clots with fewer drops to plateau (DTP ≤ 7).
• Significant associations were found between DTP, TTP, DTR, and various biomarkers including total homocysteine (tHcy), activated partial thromboplastin time (APTT), fibrinogen, and C-reactive protein (CRP).

Conclusions:

• The automated method provides a reliable and efficient alternative for measuring fibrin clot permeability (Ks).
• This automated approach offers additional quantitative parameters (DTP, TTP, DTR) for a more detailed characterization of fibrin clot structure.
• The developed method shows potential for both research applications and clinical diagnostics in hematology.