A nurse is assessing a client who has a possible abdominal aortic aneurysm (AAA). Which of the following is an early manifestation of an AAA?

A. A CT angiogram will reveal any edema within the brain tissue: CT angiography primarily focuses on visualizing blood vessels and blood flow within the brain. While it may incidentally detect areas of edema, its primary purpose is to assess vascular structures rather than brain tissue changes such as edema.

B. A CT angiogram will reveal any overproduction of cerebrospinal fluid (CSF): CT angiography does not assess cerebrospinal fluid (CSF) production. Its main function is to visualize blood vessels and blood flow within the brain, particularly to detect abnormalities such as aneurysms, arteriovenous malformations, or vasospasm.

C. A CT angiogram will reveal any fractures within the skull or spine: CT angiography primarily focuses on imaging blood vessels and is not the preferred modality for detecting fractures within the skull or spine. CT scans or plain radiography are typically used to assess bony structures for fractures.

D. A CT angiogram will reveal any decreased blood flow related to vasospasm: This statement is correct. CT angiography is a specialized imaging technique that combines computed tomography (CT) scanning with contrast dye to visualize blood vessels and blood flow within the brain. It is commonly used to detect and monitor vasospasm, a potentially serious complication of subarachnoid hemorrhage, where blood vessels in the brain constrict, leading to decreased blood flow. CT angiography allows for the visualization of these changes in blood vessel diameter and blood flow dynamics.

A. Decrease sedation: Decreasing sedation may help reduce intracranial pressure (ICP) by allowing the client to have a more responsive level of consciousness. However, it is not a direct treatment for brain herniation. Sedation reduction should be done cautiously to prevent agitation and further increases in ICP.

B. Hyperventilate the client: Hyperventilation is a temporary intervention used to reduce intracranial pressure by inducing cerebral vasoconstriction, which decreases cerebral blood flow and intracranial volume. However, it is typically reserved for acute situations and is not considered a definitive treatment for brain herniation. Prolonged or excessive hyperventilation can lead to cerebral ischemia and should be used cautiously.

C. Lower blood pressure: Lowering blood pressure may help reduce cerebral perfusion pressure, which can mitigate the risk of further brain injury during herniation. However, lowering blood pressure alone is not a direct treatment for brain herniation. It may be part of the overall management strategy to prevent secondary injury.

D. Reduce the temperature in the room: Reducing the temperature in the room, or therapeutic hypothermia, is sometimes used in the management of elevated intracranial pressure and brain injury. Lowering body temperature can reduce metabolic demands and cerebral edema, thereby lowering intracranial pressure. However, it is not a direct treatment for brain herniation and should be implemented cautiously to prevent complications such as shivering and hypotension.