Causes of bleeding after epidural needle aspiration

Most of the causes of epidural hemorrhage are caused by trauma to the head, which is caused by local skull fractures, deformation, and rupture of the middle meningeal artery or venous sinus barrier vein. Hemorrhages are located between the dura mater and the inner plate of the skull, mainly in the frontotemporal and parietotemporal areas. According to the length of the onset time, it can be divided into acute epidural hematoma, subacute epidural hematoma and chronic epidural hematoma, of which acute epidural hematoma is the most common. Severe epidural hemorrhage can cause brain herniation, which threatens the patient's life and requires prompt surgical treatment.

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