The patient is receiving nitroglycerin 55 mcg/min.
Available: Nitroglycerin in 5% Dextrose Injection 25 mg per 250 mL (100 mcg/mL)
What is the flow rate?
3 mL/hr
55 mL/hr
30 mL/hr
33 mL/hr
The Correct Answer is D
Convert the dosage to mcg per hour:
55 mcg/min × 60 min = 3300 mcg/hr
Determine the concentration of nitroglycerin available:
The concentration is 25 mg per 250 mL, which converts to 100 mcg/mL.
Calculate the flow rate in mL per hour using the dosage and concentration:
Flow rate (mL/hr)=(Dose (mcg/hr)/Concentration (mcg/mL))
(3300 mcg/hr100 mcg/mL)=33 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Given:
Ordered volume of Isomil: 12 oz
Step 1: Determine the volume of Isomil needed for 1/4 strength:
Volume of Isomil for 1/4 strength = Original volume x (1/4)
Volume of Isomil for 1/4 strength = 12 oz x (1/4)
Volume of Isomil for 1/4 strength = 3 oz
Step 2: Calculate the volume of solvent (water) needed:
Solvent volume = Original volume - Volume of Isomil for 1/4 strength
Solvent volume = 12 oz - 3 oz
Solvent volume = 9 oz
Step 3: Convert ounces to milliliters:
1 oz = 29.5735 mL
Solvent volume (mL) = 9 oz x 29.5735 mL/oz
Solvent volume (mL) = 266.1615 mL
Step 4: Round to the nearest whole number:
Solvent volume (mL) ≈ 270 mL
Correct Answer is B
Explanation
A) Neutropenia
Neutropenia refers to an abnormally low level of neutrophils, a type of white blood cell. While certain medications, such as chemotherapy agents and some antipsychotic drugs, can cause neutropenia, atenolol (a beta-blocker) is not typically associated with this side effect. Atenolol primarily affects the cardiovascular system by reducing heart rate and blood pressure, and it is not known to cause significant changes in white blood cell counts.
B) Bradycardia
Bradycardia, or a slower-than-normal heart rate, is a well-known and common adverse effect of beta-blockers, including atenolol. Beta-blockers work by blocking beta-adrenergic receptors, which decreases the heart rate and the force of contraction, as well as lowering blood pressure. In some individuals, this can lead to excessively low heart rates, which could be dangerous if the heart rate drops too much. Bradycardia can lead to symptoms such as dizziness, fainting, or fatigue, and may require dose adjustments or discontinuation of the medication
C) Anemia
Anemia, which is a condition characterized by a low red blood cell count or low hemoglobin levels, is generally not a common adverse effect of atenolol. While certain medications like some chemotherapeutic agents, NSAIDs, or antibiotics may cause anemia due to their effects on the bone marrow or by causing gastrointestinal bleeding, atenolol is not typically linked to this side effect.
D) Hypokalemia
Hypokalemia (low potassium levels) is typically associated with the use of diuretics or other medications that cause the kidneys to excrete more potassium, such as some classes of antibiotics and corticosteroids. However, atenolol, being a beta-blocker, does not directly affect potassium levels.
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