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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Correct Answer is B
Explanation
A. "I am constipated." Constipation is not a common indicator of digoxin toxicity; it may be more related to diet or other medications.
B. "My vision seems yellow." Yellow or blurred vision, also called xanthopsia, is a classic sign of digoxin toxicity and should be reported immediately.
C. "My tongue is red and beefy." A red and beefy tongue may indicate vitamin B12 deficiency, not digoxin toxicity.
D. "I am gaining weight." Weight gain is usually a sign of fluid retention or worsening heart failure, not specifically digoxin toxicity.
Correct Answer is C
Explanation
A. S3 heart sounds. An S3 sound is more indicative of heart failure rather than PVCs specifically.
B. Increase in point of maximum impulse (PMI). PMI is typically displaced in conditions like ventricular hypertrophy or heart failure, not PVCs.
C. Irregular pulsations. PVCs are extra beats that interrupt the heart’s normal rhythm, leading to irregular pulsations on palpation.
D. Bradycardia. PVCs usually occur in the context of normal or elevated heart rates rather than bradycardia.