intrakranielle

Intrakranielle, or intracranial, describes anything related to the contents within the skull: the brain parenchyma, the meninges, the cerebrospinal fluid in the ventricles and subarachnoid spaces, and the blood within the cranium. The cranial cavity is a fixed-volume compartment; therefore, increases in one component can raise intracranial pressure and affect cerebral perfusion.

Normal intracranial pressure (ICP) in awake adults is typically 7-15 mmHg. Values persistently above about 20-25 mmHg are a medical concern and can require intervention. Cerebral perfusion pressure (CPP) is the difference between mean arterial pressure and ICP, and it should be maintained to ensure adequate brain blood flow.

Intrakranielle conditions include traumatic brain injury with hemorrhage (epidural, subdural, and intraparenchymal hematomas), intracranial hemorrhages such as subarachnoid hemorrhage, brain tumors, hydrocephalus, and cerebral edema. Infections like meningitis or encephalitis, abscesses, and inflammatory processes can also involve intracranial structures. All of these can increase ICP or disrupt brain function.

Diagnosis in acute cases relies on neuroimaging, with computed tomography (CT) as the first-line tool, followed by magnetic resonance imaging (MRI) for further detail. In severe cases, intracranial pressure monitoring may be employed to guide therapy.

Management focuses on treating the underlying cause and protecting brain tissue. Measures to control ICP include head elevation, normoxemia, blood pressure optimization, and, when needed, hyperosmolar therapy or sedation. Surgical interventions such as burr-hole drainage, craniectomy, or tumor removal may be required. Prognosis varies with the etiology, severity, and speed of treatment.