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A doctor orders Vancomycin 500 mg to infuse at 5 mg/kg/hr. The patient weighs 98 lbs. You are supplied with a 500 mg/100 mL bag. How many mL/hr will you administer? (Round your answer to the nearest tenths)

A.

44 mL/dose

B.

44.5 mL/hr

C.

44.50 mL/dose

D.

44 units

Answer and Explanation

The Correct Answer is B

Given:

Ordered dose of Vancomycin: 500 mg

Infusion rate: 5 mg/kg/hr

Patient weight: 98 lbs

Concentration of Vancomycin: 500 mg/100 mL

 

Step 1: Convert patient weight from pounds to kilograms:

1 pound (lb) = 0.453592 kilograms (kg)

Patient weight in kg = 98 lbs x 0.453592 kg/lb = 44.462256 kg

 

Step 2: Calculate the total dose of Vancomycin in mg/hr:

Total dose (mg/hr) = Ordered dose (mg/kg/hr) x Patient weight (kg)

Total dose (mg/hr) = 5 mg/kg/hr x 44.462256 kg

Total dose (mg/hr) = 222.31128 mg/hr

 

Step 3: Calculate the infusion rate in mL/hr:

Infusion rate (mL/hr) = Total dose (mg/hr) / Concentration (mg/mL)

Infusion rate (mL/hr) = 222.31128 mg/hr / (500 mg/100 mL)

Infusion rate (mL/hr) = 222.31128 mg/hr x (100 mL/500 mg)

Infusion rate (mL/hr) = 44.462256 mL/hr

 

Step 4: Round to the nearest tenth:

Infusion rate (mL/hr) ≈ 44.5 mL/hr


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Related Questions

Correct Answer is A

Explanation

A) Nausea and vomiting:
Nausea and vomiting are common gastrointestinal side effects of ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID). Ibuprofen can irritate the stomach lining, leading to nausea, vomiting, or even gastritis and peptic ulcers with long-term use. This is a well-known side effect of NSAIDs, and clients are often advised to take the medication with food to reduce the risk.

B) Drowsiness:
While some individuals may experience fatigue or a mild sedative effect, it is not typically associated with ibuprofen. Other pain medications, such as opioids or certain antihistamines, are more likely to cause drowsiness, but this is rare for ibuprofen.

C) Blurred vision:
While serious side effects of NSAIDs can include vision changes (e.g., from elevated blood pressure or kidney dysfunction), blurred vision is not directly related to ibuprofen use. If blurred vision occurs, it is important to investigate other potential causes or conditions.

D) Increased heart rate:
Ibuprofen primarily affects the inflammatory pathways and the gastrointestinal system, and does not typically cause changes in heart rate. However, in rare cases, NSAIDs can lead to cardiovascular issues such as increased blood pressure, which could indirectly affect heart rate, but tachycardia is not a common or expected side effect.

Correct Answer is C

Explanation

Given:
Volume of fluid: 500 mL
Infusion time: 12 hours

Formula:
Flow rate (mL/hr) = Volume (mL) / Time (hr)

Step 1: Calculate the flow rate in mL/hr:
Flow rate (mL/hr) = 500 mL / 12 hr
Flow rate (mL/hr) = 41.66666667 mL/hr

Step 2: Round to the nearest whole number:
Flow rate (mL/hr) ≈ 42 mL/hr

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