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Exam Review

Dosage calculation (hellen fluid college)

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Total Questions : 63

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Question 1:

Find the total volume to administer. ___________.

Ordered: D5W @ 20 gtt/min over 6 h via 60 gtt/ml tubing 120 mL

Answer and Explanation
Correct Answer: "120" mL

Explanation

Given values:

Flow rate = 20 gtt/min

Infusion time = 6 hours

Drop factor = 60 gtt/mL

  • Convert the infusion time from hours to minutes.

Infusion time in minutes = 6 hours × 60 minutes/hour

= 360 minutes.

  • Calculate the total volume in milliliters (mL) using the formula:

Total Volume (mL) = (Flow rate (gtt/min) × Infusion time (min)) / Drop factor (gtt/mL)

= (20 gtt/min × 360 min) / 60 gtt/mL

= 7200 / 60

= 120 mL.


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Question 2:

Find the flow rate in gtt/min.

Ordered: 1,800 mL RL q24h using tubing calibrated to 10 gtt/mL

Answer and Explanation
Correct Answer: "13" gtt/min

Explanation

Total volume = 1,800 mL

Infusion time = 24 hours

Drop factor = 10 gtt/mL

  • Convert the infusion time from hours to minutes.

Infusion time in minutes = 24 hours × 60 minutes/hour

= 1440 minutes.

  • Calculate the flow rate in drops per minute (gtt/min) using the formula:

Flow rate (gtt/min) = (Total volume (mL) × Drop factor (gtt/mL)) / Infusion time (min)

= (1800 mL × 10 gtt/mL) / 1440 min

= 18000 / 1440

= 12.5 gtt/min.

  • Round the answer to the nearest whole number.

= 13 gtt/min.


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Question 3:

Calculate the flow rate to be administered by an infusion pump: (Round to the nearest whole number)

Ordered: 475 mL LR over 2 h

Answer and Explanation
Correct Answer: "238" mL/h

Explanation

Calculation:

Given values:

Total volume = 475 mL

Infusion time = 2 hours

  • Calculate the flow rate in mL/h using the formula:

Flow rate (mL/h) = Total volume (mL) / Infusion time (h)

= 475 mL / 2 h

= 237.5 mL/h.

  • Round the answer to the nearest whole number.

= 238 mL/h.


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Question 4:

The manufacturer's instructions for an autoclave (sterilizing unit) in a clinic specify that the autoclave must reach a temperature of 121 °C under 15 pounds per square inch of pressure for a minimum of 15 minutes to ensure sterilization. The technician who is doing routine maintenance on the machine will check the operating temperature using a Fahrenheit thermometer, the autoclave is working properly the temperature should be __________ (round to the nearest whole number).

Answer and Explanation
Correct Answer: "250" °F

Explanation

  • Conversion formula:

F= (C×1.8)+32

F= (121×1.8) + 32

=217.8 + 32

=249.8

  • Round the answer to the nearest whole number.

= 250°F.


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Question 5:

How many milligrams of sodium chloride are contained in 1,000 mL of D5 (1/2) NS?

Answer and Explanation

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Question 6:

What is the route for this medication?

Answer and Explanation

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Question 7:

On the advice of his physician, a patient purchases a bottle of over-the-counter cough syrup to treat the cough associated with his cold. The bottle contains 16 tablespoons (tbsp) of medication, and 1 dose of the medication is 1 ½ tbsp. After the patient takes 3 doses of the medication, how many tablespoons of medication are left in the bottle?

Answer and Explanation

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Question 8:

There are __________ doses in this container if a 5 mL dose is ordered.

Answer and Explanation
Correct Answer: "40" doses

Explanation

Calculation:

  • Total volume in the container from the label.

The label states the total volume is 200 mL (when reconstituted).

  • Volume of a single dose.

Ordered dose is 5 mL.

  • Calculate the total number of doses.

Total doses = Total volume / Volume per dose

= 200 mL / 5 mL

= 40 doses


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Question 9:

Mr. Jones is to receive 2.25 mL of a liquid medication every 4 hours. How much medication will he receive during 3 days

Answer and Explanation

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Question 10:

Mr. Anderson is to receive a medication that was prepared, prepackaged, and labeled with his name by the hospital pharmacy. The medication technician greets Mr. Anderson and verifes his identity, then removes the medication from its storage container and checks it against the MAR. She then administers the medication to Mr. Anderson. What did the medication technician do wrong?

Answer and Explanation

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