A nurse is caring for a client who is to receive liquid medications via a gastrostomy tube. The client is prescribed phenytoin 250 mg. The amount available is phenytoin oral solution 25 mg/5 mL. How many mL should the nurse administer per dose?
(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["50"]
To calculate the mL of phenytoin oral solution needed for a 250 mg dose, we can use the following equation:
Dose (mg) = Volume (mL) × Concentration (mg/mL)
Given:
Dose = 250 mg
Concentration = 25 mg/5 mL
We need to find the volume (mL):
Volume (mL) = Dose (mg) / Concentration (mg/mL)
Volume (mL) = 250 mg / (25 mg/5 mL)
Volume (mL) = 250 mg / (5 mg/mL)
Volume (mL) = 50 mL
So, the nurse should administer 50 mL of phenytoin oral solution per dose.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Polyuria (excessive urination) is not a symptom of hypoglycemia; it is more commonly associated with hyperglycemia (high blood sugar).
B. Deep rapid respirations are more characteristic of diabetic ketoacidosis (DKA), a complication of uncontrolled diabetes that leads to high blood sugar levels and metabolic acidosis.
C. Dry, flushed skin is not a typical symptom of hypoglycemia; it might be associated with conditions like dehydration or heat exposure, but not with low blood sugar.
D. Tachycardia
Explanation: The symptoms described by the adolescent (feeling shaky, difficulty speaking, difficulty concentrating) along with a blood glucose level of 55 mg/dL indicate hypoglycemia, which is low blood sugar. Tachycardia, or a rapid heart rate, is a common physiological response to hypoglycemia. The body increases the heart rate in an attempt to improve blood flow and deliver glucose to the brain and other vital organs. This is part of the body's fight-or-flight response to low blood sugar.
Correct Answer is A
Explanation
Fluid Requirement (mL/24 hours) = Weight (kg) × Fluid Requirement (mL/kg)
Given that the child weighs 70.4 pounds, we first need to convert this weight to kilograms (1 lb = 0.453592 kg):
Weight in kg = 70.4 lb × 0.453592 kg/lb ≈ 31.89 kg
Now, let's calculate the fluid requirement using the given choices:
A) 1740:
Fluid Requirement = 31.89 kg × 55 mL/kg = 1753.95 mL
B) 134056:
This number is significantly larger than any reasonable fluid requirement and is likely an error.
C) 2:
This value is far too low to represent the fluid requirements of a child.
D) 12:
This value is also too low to represent the fluid requirements of a child.
So, the correct answer is A) 1740 mL. The child's estimated daily fluid requirement would be around 1740 mL in a 24-hour period, based on a weight of 70.4 pounds.
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