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Order: 1 liter or 1000 mL of D5W to infuse over 6 hours

Available: Macrodrip set: 10 gtt/mL

The IV flow rate would be ______gtt/min.

A.

28

B.

27

C.

16.67

D.

17

E.

17

Answer and Explanation

The Correct Answer is A

Given:

Volume of fluid: 1 liter = 1000 mL

Infusion time: 6 hours

Drop factor: 10 gtt/mL

 

Formula:

Flow rate (gtt/min) = (Volume (mL) / Time (hr)) x Drop factor (gtt/mL) / 60 min/hr

 

Step 1: Calculate the infusion rate in mL/hr:

Infusion rate (mL/hr) = Volume (mL) / Time (hr)

Infusion rate (mL/hr) = 1000 mL / 6 hr

Infusion rate (mL/hr) = 166.67 mL/hr

 

Step 2: Calculate the flow rate in gtt/min:

Flow rate (gtt/min) = (Infusion rate (mL/hr) x Drop factor (gtt/mL)) / 60 min/hr

Flow rate (gtt/min) = (166.67 mL/hr x 10 gtt/mL) / 60 min/hr

Flow rate (gtt/min) = 1666.7 gtt/hr / 60 min/hr

Flow rate (gtt/min) = 27.78 gtt/min

 

Step 3: Round to the nearest whole number:

Flow rate (gtt/min) ≈ 28 gtt/min


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Related Questions

Correct Answer is B

Explanation

Given:

Ordered dose of amoxicillin: 30 mg/kg/day divided every 12 hours

Toddler's weight: 33 lbs

Concentration of amoxicillin suspension: 200 mg/5 mL

Step 1: Convert the toddler's weight from pounds to kilograms:

1 pound (lb) = 0.453592 kilograms (kg)

Weight in kg = 33 lbs x 0.453592 kg/lb = 14.968 kg

Step 2: Calculate the total daily dose of amoxicillin:

Total daily dose (mg) = Ordered dose (mg/kg/day) x Weight (kg)

Total daily dose (mg) = 30 mg/kg/day x 14.968 kg

Total daily dose (mg) = 449.04 mg/day

Step 3: Calculate the dose per administration:

Since the medication is given every 12 hours, there are 2 administrations per day.

Dose per administration (mg) = Total daily dose (mg) / Number of administrations per day

Dose per administration (mg) = 449.04 mg/day / 2 administrations/day

Dose per administration (mg) = 224.52 mg

Step 4: Calculate the volume to be administered:

Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)

Volume (mL) = 224.52 mg / (200 mg/5 mL)

Volume (mL) = 224.52 mg x (5 mL / 200 mg)

Volume (mL) = 5.613 mL

Step 5: Round to the nearest tenth:

Volume (mL) ≈ 5.6 mL

Correct Answer is C

Explanation

Given:

Ordered dose of acetaminophen: 10 mg/kg

Child's weight: 22 lb

Concentration of acetaminophen liquid: 160 mg/5 mL

Step 1: Convert child's weight from pounds to kilograms:

1 pound (lb) = 0.453592 kilograms (kg)

Child's weight in kg = 22 lbs x 0.453592 kg/lb = 9.976824 kg

Step 2: Calculate the total dose of acetaminophen:

Total dose (mg) = Ordered dose (mg/kg) x Child's weight (kg)

Total dose (mg) = 10 mg/kg x 9.976824 kg

Total dose (mg) = 99.76824 mg

Step 3: Calculate the volume to be administered:

Volume (mL) = Total dose (mg) / Concentration (mg/mL)

Volume (mL) = 99.76824 mg / 160 mg/5 mL

Volume (mL) = 99.76824 mg x (5 mL / 160 mg)

Volume (mL) = 3.1177575 mL

Step 4: Round to the nearest tenth:

Volume (mL) ≈ 3.1 mL

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