Chronologic echogenicity changes and histologic correlates in experimental blood clots: a serial sonographic study

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Hematology

Background:

• Blood clot echogenicity is crucial for diagnosis and monitoring.
• Understanding clot evolution aids in developing targeted therapies.

Purpose of the Study:

• To identify echogenicity changes in blood clots over time.
• To correlate sonographic findings with histologic characteristics.

Main Methods:

• B-mode sonography was used to assess clot echogenicity at 2, 6, 24, and 48 hours post-formation.
• Echogenicity was quantified using normalized grayscale median measurements.
• Clots were histologically classified based on red blood cell (RBC) density.

Main Results:

• Significant chronologic changes in grayscale median were observed, with a minimum at 6 hours and a peak at 24 hours (P = .027).
• Higher grayscale median values were associated with dense RBC clots, while lower values indicated loose RBC clots (P < .0353).

Conclusions:

• Sonography effectively captures chronologic echogenicity changes in clots over 48 hours.
• The grayscale median is a reliable indicator of clot echogenicity and correlates with RBC density.