Samantha Hudson a two-year-old child in the ER with parents at the bedside. She came in not feeling well, irritable, crying all night, and not eating or drinking. Orders: Vistaril 15 mg IM q4h, Stat x 1 for nausea.
Available: Vistaril 50 mg/ml
How many mL will you administer to Samantha now?
1 mL
0.5 mL
0.3 mL
0.2 mL
The Correct Answer is C
Given:
Desired dose of Vistaril: 15 mg
Concentration of Vistaril: 50 mg/mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
15 mg / Volume = 50 mg/mL
Step 3: Solve for the unknown volume:
Volume = 15 mg / 50 mg/mL
Step 4: Calculate the volume:
Volume = 0.3 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A) 6 Units Regular Insulin sub-cut:
According to the sliding scale, a blood glucose level of 164 mg/dL would not fall within the range requiring 6 units of insulin. The 6-unit dose is for blood glucose levels between 301-490 mg/dL. Since the client's reading of 164 mg/dL is lower than 181 mg/dL, this dosage is not applicable.
B) 2 Units Regular Insulin sub-cut:
This is also incorrect. The 2-unit dose is prescribed for blood glucose levels between 181-240 mg/dL. Since the client's reading is 164 mg/dL, it falls below this range, so 2 units is not appropriate.
C) 0.5 Units Regular insulin sub-cut:
This is not correct because there is no provision in the sliding scale for administering 0.5 units of insulin. The scale provides dosing for specific ranges and does not include fractional doses. Additionally, the blood glucose reading of 164 mg/dL does not require any insulin according to the prescribed sliding scale.
D) No coverage:
According to the sliding scale, a blood glucose level of 164 mg/dL falls within the 0-180 mg/dL range, which specifies no coverage or insulin administration. The sliding scale clearly indicates that no insulin is needed when the blood glucose level is within this range.
Correct Answer is C
Explanation
Given:
Ordered dose of Heparin: 100,000 units
Concentration of Heparin: 25,000 units/10 mL
Step 1: Set up the proportion:
Desired dose (units) / Volume to administer (mL) = Concentration (units/mL)
Step 2: Substitute the values:
100,000 units / Volume = 25,000 units/10 mL
Step 3: Solve for the unknown volume:
Volume = 100,000 units / (25,000 units/10 mL)
Volume = 100,000 units x (10 mL / 25,000 units)
Volume = 40 mL
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