Adipose tissue location and contribution to postinjury hypercoagulability

Area of Science:

• Trauma and Injury Research
• Coagulation Science
• Obesity Medicine

Background:

• Obesity is linked to a hypercoagulable state, increasing thrombotic event risk.
• Adipose tissue distribution (visceral vs. subcutaneous) may differentially impact arterial and venous thrombosis.
• The relationship between adipose tissue quantity, location, and coagulation markers post-trauma requires further investigation.

Purpose of the Study:

• To investigate the correlation between adipose tissue amount and location with coagulation measures in trauma patients.
• To determine if visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) influence specific coagulation parameters.

Main Methods:

• Adult trauma patients with admission abdominal CT scans and rotational thromboelastometry (ROTEM) were included.
• VAT and SAT areas were quantified using novel software.
• Spearman correlation and stepwise linear regression analyzed associations between adipose tissue and coagulation markers.

Main Results:

• Neither SAT nor VAT correlated with standard coagulation tests (PT, INR, PTT).
• SAT positively correlated with platelet count.
• Both VAT and SAT correlated with ROTEM parameters indicating hypercoagulability (e.g., reduced clot formation time, increased clot firmness), with stronger associations for SAT.

Conclusions:

• Increased adipose tissue is associated with relative hypercoagulability after trauma.
• Subcutaneous adipose tissue demonstrates a stronger relationship with functional coagulation measures than visceral adipose tissue.
• SAT may play a significant role in post-injury hypercoagulability and hemorrhage resistance.