Chapter 61: Acute Intracranial Problems

Students learn about cerebral autoregulation mechanisms, cerebral perfusion pressure calculations, and how compensatory systems maintain adequate brain perfusion under normal conditions. The chapter extensively explores increased intracranial pressure as a life-threatening emergency, detailing the three types of cerebral edema—vasogenic, cytotoxic, and interstitial—and their distinct pathophysiological mechanisms. Clinical manifestations are thoroughly examined, including altered consciousness levels, Cushing triad presentation, pupillary changes, abnormal motor responses, and other neurological deterioration signs. Diagnostic approaches receive detailed attention, covering neuroimaging techniques, electroencephalography, cerebral angiography, and invasive intracranial pressure monitoring through ventriculostomy systems. Management strategies encompass both medical and surgical interventions, including positioning techniques, mechanical ventilation protocols, osmotic therapy with mannitol and hypertonic saline, corticosteroid administration, temperature regulation, and advanced treatments like barbiturate coma induction. The chapter provides extensive coverage of traumatic brain injuries, progressing from minor scalp wounds and skull fractures to severe conditions like diffuse axonal injury, cerebral contusions, and various hematoma types including epidural, subdural, and intracerebral collections. Brain tumor pathophysiology and treatment modalities are explored, encompassing primary tumors like gliomas and meningiomas as well as metastatic disease management through surgical resection, radiation therapy, and chemotherapeutic approaches. The content concludes with inflammatory brain conditions including bacterial and viral meningitis, encephalitis, and brain abscess formation, emphasizing rapid recognition, antimicrobial therapy, and prevention of devastating complications like hydrocephalus and systemic sepsis.