The nurse informs the patient to remain well hydrated while taking lithium because dehydration can lead to:
Lithium toxicity
Increased effectiveness
The need to increase the lithium dosage
Lower serum lithium levels
The Correct Answer is A
A. Lithium toxicity can occur if the patient becomes dehydrated while taking lithium, as dehydration can lead to higher concentrations of lithium in the blood.
B. Increased effectiveness is not a consequence of dehydration while taking lithium.
C. Dehydration would not typically lead to the need to increase the lithium dosage but rather to the risk of toxicity.
D. Dehydration can lead to higher, not lower, serum lithium levels, increasing the risk of toxicity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. ACE inhibitors primarily lower blood pressure and are not commonly used to treat coronary artery spasms.
B. Calcium channel blockers are commonly used to treat both stable angina and coronary artery spasms because they relax blood vessels, improving blood flow to the heart.
C. Beta blockers primarily reduce heart rate and blood pressure and are not typically used to treat coronary artery spasms.
D. Thrombolytics are used to dissolve blood clots and are not indicated for coronary artery spasms.
Correct Answer is C
Explanation
A. Organic nitrates do not increase contractility and heart rate; they typically decrease myocardial oxygen demand.
B. Organic nitrates do not slow heart rate or decrease contractility of the heart.
C. The mechanism of action of organic nitrates in the treatment of angina is the relaxation of arterial and venous smooth muscle, leading to vasodilation and decreased myocardial oxygen demand.
D. Organic nitrates do not increase peripheral resistance; they typically cause vasodilation.
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