A nurse is caring for a client who has a subarachnoid hemorrhage and asks why they are having a CT angiography. Which of the following should the nurse understand about CT angiography?
A CT angiogram will reveal any edema within the brain tissue.
A CT angiogram will reveal any overproduction of cerebrospinal fluid (CSF).
A CT angiogram will reveal any fractures within the skull or spine.
A CT angiogram will reveal any decreased blood flow related to vasospasm.
The Correct Answer is D
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. The heart's electrical transmission through the atrioventricular (AV) node is unusually slow: This statement does not align with the manifestations of dizziness and palpitations in atrial fibrillation. A slow conduction through the AV node would typically manifest as bradycardia or heart block rather than rapid and irregular palpitations.
B. The heart's electrical signals are rapid, chaotic, and irregular: This is the correct answer. Atrial fibrillation is characterized by rapid, chaotic, and irregular electrical signals in the atria, leading to ineffective atrial contractions and an irregular ventricular response. The irregularity and rapidity of the heart rate can lead to symptoms such as palpitations and dizziness.
C. An early electrical signal occurs before the expected sinoatrial (SA) node signal: This statement does not accurately describe the mechanism of atrial fibrillation. Atrial fibrillation involves disorganized electrical activity in the atria, rather than a single early electrical signal.
D. The SA node sends an electrical signal greater than 100/min: While a heart rate greater than 100/min (tachycardia) is commonly associated with atrial fibrillation, this statement does not fully explain the manifestations of dizziness and palpitations. These symptoms are more directly related to the irregularity and chaotic nature of the heart's electrical signals in atrial fibrillation.
Correct Answer is B
Explanation
A. "Medications for Alzheimer's disease will help to increase my energy levels": This statement is not accurate. Medications for Alzheimer's disease, such as cholinesterase inhibitors (e.g., donepezil, rivastigmine) and memantine, are not intended to increase energy levels. Their primary goal is to improve cognitive function and help manage symptoms associated with Alzheimer's disease, but they do not directly affect energy levels.
B. "Medications for Alzheimer's disease will help slow the progression of my disease": This statement is correct. Medications used to treat Alzheimer's disease, such as cholinesterase inhibitors and memantine, are aimed at slowing the progression of cognitive decline and managing symptoms associated with the disease. While these medications cannot cure Alzheimer's disease, they can help improve cognitive function and quality of life for some individuals.
C. "Medications for Alzheimer's disease will help me remember what I forgot": This statement oversimplifies the effects of Alzheimer's medications. While these medications may help improve memory and cognition to some extent, they are not capable of restoring lost memories or reversing the effects of significant memory impairment caused by Alzheimer's disease.
D. "Medications for Alzheimer's disease will cure the disease": This statement is incorrect. Currently, there is no cure for Alzheimer's disease. Medications used to treat Alzheimer's, such as cholinesterase inhibitors and memantine, can help manage symptoms and slow disease progression, but they do not cure the underlying condition.
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