Duret hemorrhage Pons of uncinate herniation Brain Herniation скачать в хорошем качестве

Duret hemorrhage Pons of uncinate herniation Brain Herniation

Duret hemorrhages are a critical and often fatal complication of brain herniation, particularly involving the pons and midbrain. They are most commonly associated with uncal (uncinate) herniation, a type of transtentorial herniation where the medial part of the temporal lobe is displaced downward through the tentorial notch. 🧠 What Is a Duret Hemorrhage? Definition: Small linear or round hemorrhages in the brainstem, especially the pons and midbrain, caused by stretching and tearing of perforating arteries due to downward brain displacement. Cause: Rapid increase in intracranial pressure leading to descending transtentorial herniation Named After: Henri Duret, who first described these lesions in 1874 🔥 Connection to Uncal Herniation Uncal Herniation: The uncus of the temporal lobe herniates through the tentorial notch, compressing the brainstem Effect: This displacement stretches small vessels in the brainstem, especially branches of the basilar artery, leading to hemorrhage Result: Damage to vital centers in the brainstem controlling consciousness, respiration, and cardiac function 🩺 Clinical Features Rapid Decline in Consciousness Abnormal Breathing Patterns (e.g., Cheyne-Stokes respiration) Fixed and Dilated Pupils (due to cranial nerve III compression) Hemiparesis or Quadriparesis Coma and Death in severe cases 🔬 Imaging & Histology CT/MRI: Shows small hemorrhages in the midline of the pons or midbrain Histology: Parenchymal bleeding with evidence of vascular disruption #hemorrhage