A nurse is caring for a client who experienced severe head trauma. The client's partner asks the nurse why they are concerned about the mean arterial pressure (MAP). The nurse should explain that MAP determines which of the following?
Cerebral blood flow
The client's intake and output needs
Regulation of blood pressure
Resorption of cerebrospinal fluid
The Correct Answer is A
A. Cerebral blood flow. MAP is crucial for maintaining adequate cerebral perfusion pressure, ensuring enough blood flow to the brain.
B. The client's intake and output needs. MAP does not directly influence intake and output needs; it is more directly related to blood flow and tissue perfusion.
C. Regulation of blood pressure. MAP is a measure of average blood pressure but not a regulator of it.
D. Resorption of cerebrospinal fluid. CSF resorption is not directly influenced by MAP; it’s regulated by intracranial pressure and other factors.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Creatine kinase-myocardial band (CK-MB) test: While CK-MB is also a marker of myocardial injury, it is less specific than troponin and can be elevated in other conditions, such as muscle injury.
B. Troponin T test. The Troponin T test is highly specific and sensitive for myocardial injury and is considered the gold standard for diagnosing a myocardial infarction. Troponin levels rise within hours of cardiac muscle injury and remain elevated for days, providing an early and reliable indicator of cardiac muscle damage.
C. Brain natriuretic peptide (BNP) test. BNP levels are used to assess heart failure and do not indicate acute cardiac muscle injury.
D. Creatine kinase (CK) test. CK measures overall muscle injury, not specific to cardiac muscle.
Correct Answer is B
Explanation
A. Fatigue. Fatigue can be a common symptom of various health conditions, including heart disease, and is not specific to pacemaker malfunction.
B. Rapid pulse. A rapid pulse or palpitations may signal a malfunction where the pacemaker is pacing too quickly or erratically.
C. Increased urine output. Increased urine output is not related to pacemaker function and does not indicate a malfunction.
D. Sneezing. Sneezing is unrelated to pacemaker malfunction and does not warrant provider notification.
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