Which of the following are causes of hematoma formation?

• A. Failure to establish adequate hemostasis
• B. Presence of dead space intraoperatively
• C. Coagulopathies
• D. All of the above

Answer: (D)

Hematoma formation after a procedure happens when blood collects in tissue due to factors that allow ongoing bleeding or blood pooling. The main contributors are a failure to achieve adequate hemostasis, the presence of dead space created during surgery, and underlying coagulopathies.

If hemostasis isn’t properly achieved, vessels continue to bleed or ooze into the surgical site, making a hematoma more likely. Dead space provides a potential cavity where blood can accumulate; if tissue planes aren’t adequately closed or packed, blood has room to pool rather than being compressed out or reabsorbed. Coagulopathies, whether from inherent clotting disorders or from medications that impair clot formation, reduce the body’s ability to form a stable clot, increasing both the chance of bleeding and the volume of hematoma that can develop.

Because each of these mechanisms can independently and synergistically contribute to hematoma formation, all of the above are valid causes. Addressing risk involves meticulous hemostasis, eliminating dead space when possible, and correcting any coagulopathy or adjusting anticoagulant/antiplatelet therapy as appropriate.