A nurse practitioner orders 1 liter of 0.9% normal saline to infuse over 6 hours. How many milliliters per hour will the nurse program the IV infusion device? Round off.
160 ml/hr
125 ml/hr
100 ml/hr
167 ml/hr
The Correct Answer is D
To calculate the milliliters per hour (mL/hr) for the IV infusion, you divide the total volume (in milliliters) by the total time (in hours).
In this case, the total volume is 1 liter, which is equal to 1000 milliliters, and the total time is 6 hours.
So, you divide 1000 mL by 6 hours:
1000 mL / 6 hours = 166.67 mL/hr
Rounding off, the nurse will program the IV infusion device to infuse at approximately 167 mL/hr.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
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Correct Answer is B
Explanation
Antihistamines primarily work by blocking the H1 receptors, which are the receptors responsible for mediating the actions of histamine in the body. By blocking these receptors, antihistamines prevent or reduce the effects of histamine, such as itching, sneezing, runny nose, and watery eyes. This is the main mechanism by which antihistamines provide their therapeutic effects. "Antihistamines block release of histamine from mast cells and basophils." This statement is incorrect. Antihistamines do not block the release of histamine; instead, they block the histamine receptors to prevent the effects of histamine.
"H1 antagonists can bind to H1 receptors, H2 receptors, and muscarinic receptors." This statement is incorrect. H1 antagonists, or H1 receptor blockers, specifically bind to H1 receptors and do not have significant affinity for H2 receptors or muscarinic receptors. "First-generation antihistamines are more selective than second-generation antihistamines." This statement is incorrect. First-generation antihistamines are generally less selective and can have more sedating and anticholinergic effects compared to second-generation antihistamines, which are designed to be more selective for H1 receptors and have reduced sedative properties.
Correct Answer is B
Explanation
Loop diuretics, such as furosemide, are known to cause potassium loss as they increase urine output. A potassium level of 1.5 mEq/L indicates severe hypokalemia (low potassium levels), which can be potentially dangerous and lead to various complications, including cardiac arrhythmias.
Hence, it is important to hold the dose of the loop diuretic and notify the physician so that appropriate interventions can be taken to address the low potassium level, such as prescribing potassium supplementation or adjusting the dosage of the loop diuretic.
A sodium level of 144 is within the normal range (135-145 mEq/L) and does not require immediate action.
A blood pressure of 102/78, although it may indicate hypotension, does not necessarily require holding the dose of the loop diuretic unless it is accompanied by other significant symptoms or clinical concerns.
A calcium level of 9 mg/dL falls within the normal range (8.5-10.5 mg/dL) and does not necessitate holding the loop diuretic dose.
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