Question

lpn 101 dosage calculation exam 2

1. order: epinephrine 0.3 mg im

available: 1 mg/ml. how many ml? round to the nearest tenth.

1. 54. order: gentamicin 5 mg/kg im

patient weighs 60 kg. how many mg?

1. 60. order: phenobarbital 3 mg/kg im

child weighs 30 kg. how many mg?

1. order: insulin lispro 22 units sq

available: 100 units/ml. how many ml? round to the nearest tenth.

1. order: phenobarbital 3 mg/kg im

child weighs 30 kg. how many mg?

1. order: cefazolin 25 mg/kg im

child weighs 22 kg. how many mg?

Explanation:

Step1: Calculate Epinephrine volume

Use formula: $\text{Volume (mL)} = \frac{\text{Desired dose (mg)}}{\text{Concentration (mg/mL)}}$
$\text{Volume} = \frac{0.3}{1} = 0.3$ mL

Step2: Calculate Gentamicin dose

Multiply dose per kg by weight:
$\text{Dose} = 5 \times 60 = 300$ mg

Step3: Calculate Phenobarbital (Q9) dose

Multiply dose per kg by weight:
$\text{Dose} = 3 \times 30 = 90$ mg

Step4: Calculate Insulin lispro volume

Use formula: $\text{Volume (mL)} = \frac{\text{Desired units}}{\text{Concentration (units/mL)}}$
$\text{Volume} = \frac{22}{100} = 0.22 \approx 0.2$ mL

Step5: Calculate Phenobarbital (Q11) dose

Multiply dose per kg by weight:
$\text{Dose} = 3 \times 30 = 90$ mg

Step6: Calculate Cefazolin dose

Multiply dose per kg by weight:
$\text{Dose} = 25 \times 22 = 550$ mg

Answer:

1. 0.3 mL
2. 300 mg
3. 90 mg
4. 0.2 mL
5. 90 mg
6. 550 mg