Chapter 63: Managing Neurologic Trauma

Managing Neurologic Trauma comprehensively details the management of life-altering neurologic trauma, encompassing both traumatic brain injury (TBI) and spinal cord injury (SCI). TBI involves initial damage, known as primary injury (e.g., contusions, hematomas, skull fractures), and subsequent secondary injury, which develops over hours to days from inadequate delivery of glucose and oxygen, resulting in cerebral edema and intracranial hypertension. The dynamics of intracranial pressure (ICP) are governed by the Monro-Kellie hypothesis, requiring compensation among the volumes of brain tissue, cerebrospinal fluid (CSF), and blood. Types of brain injuries discussed range from temporary loss of function such as a concussion (mild TBI) to focal injuries like cerebral contusions and critical hematomas (epidural, subdural, and intracerebral), and severe diffuse injuries such as Diffuse Axonal Injury (DAI), which carries a poorer prognosis and immediate coma. Early management focuses heavily on preventing secondary brain damage by stabilizing cardiovascular and respiratory function, controlling ICP, and utilizing continuous neurological assessment via the Glasgow Coma Scale (GCS). Skull fractures are classified by type (linear, depressed) and location (basal), with specialized considerations noted for blast injuries in veterans and for older adults who face higher mortality and increased risk for hematomas due to physiologic aging and use of anticoagulant agents. For SCI, primary injury is the irreversible result of initial trauma, while critical care focuses on mitigating secondary injury caused by edema and hemorrhage. Injuries are categorized as complete or incomplete lesions, resulting in paraplegia (lower body paralysis) or tetraplegia (all four extremity paralysis), depending on the neurological level. Immediate emergency protocols stress rigid immobilization of the head and neck to prevent further cord damage. Acute complications following SCI include spinal shock (temporary areflexia below the lesion) and neurogenic shock (autonomic dysfunction leading to hypotension and bradycardia). A unique, life-threatening emergency in patients with lesions above T6 is autonomic dysreflexia, characterized by severe hypertension triggered typically by bladder or bowel distention, necessitating prompt identification and removal of the noxious stimulus. Long-term nursing management and rehabilitation focus on maximizing mobility, preventing disuse syndrome and contractures, maintaining skin integrity to avoid pressure injuries, establishing effective urinary and bowel programs (like intermittent catheterization), and managing spasticity. Maintaining adequate cerebral perfusion pressure (CPP) in the brain, or mean arterial pressure (MAP) (greater than 85 mm Hg) in SCI patients, is crucial for optimal outcomes. The rehabilitation process requires extensive multidisciplinary collaboration to help patients and families cope with physical, psychological, and cognitive deficits, emphasizing adaptation and independence.