Tüm alıştırma soruları

68 soru

Soru 41Soru →

A practical nurse is preparing to administer cefdinir to a pediatric client who weighs 35.2 lb35.2\text{ lb} and has acute otitis media. The healthcare provider has prescribed 7 mg/kg7\text{ mg/kg} orally every 1212 hours. The medication available is cefdinir oral suspension labeled 125 mg/5 mL125\text{ mg}/5\text{ mL}. How many mL\text{mL} should the nurse administer per dose? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 4.5

Cevap

4.5
To determine the correct dose, first convert the weight from pounds to kilograms (35.2÷2.2=16 kg35.2 \div 2.2 = 16\text{ kg}). Next, calculate the required dose by multiplying the weight by the prescribed amount (16 kg×7 mg/kg=112 mg16\text{ kg} \times 7\text{ mg/kg} = 112\text{ mg}). Then, calculate the liquid volume needed by dividing the desired dose by the available dose and multiplying by the available volume: (112 mg÷125 mg)×5 mL=4.48 mL(112\text{ mg} \div 125\text{ mg}) \times 5\text{ mL} = 4.48\text{ mL}. Finally, round to the nearest tenth as instructed, which results in 4.5 mL4.5\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
35.2 lb÷2.2 lb/kg=16 kg35.2\text{ lb} \div 2.2\text{ lb/kg} = 16\text{ kg}
The medication dosage is prescribed based on the client's weight in kilograms, so the weight must be converted first.
2
Calculate the prescribed dose in milligrams.
16 kg×7 mg/kg=112 mg16\text{ kg} \times 7\text{ mg/kg} = 112\text{ mg}
This determines the exact amount of medication the client should receive for one dose.
3
Calculate the required volume in milliliters.
(112 mg÷125 mg)×5 mL=4.48 mL(112\text{ mg} \div 125\text{ mg}) \times 5\text{ mL} = 4.48\text{ mL}
Using the standard formula determines how much of the available liquid suspension is needed to deliver the prescribed dose.
4
Round the calculated volume to the nearest tenth.
4.5 mL4.5\text{ mL}
The question specifies recording the answer to the nearest tenth to ensure accurate measurement.

Anahtar Kavram

Weight-based pediatric dosage calculation and liquid medication volume conversion.
Soru 42Soru →

An older adult client with a history of dysphagia and seizures receives scheduled medications via a percutaneous endoscopic gastrostomy (PEG) tube. The healthcare provider prescribes valproic acid syrup at a dosage of 15 mg/kg/day15\text{ mg/kg/day} divided into two equal doses. The client's current weight is 143 lb143\text{ lb}. The pharmacy supplies valproic acid syrup with a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}.

How many mL\text{mL} should the practical nurse administer for one single dose? (Record the answer to the nearest tenth. Do not include units in your answer.)

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Cevap: 9.8

Cevap

9.8
The correct calculation requires sequential mathematical steps: converting weight to kilograms (143÷2.2=65 kg143 \div 2.2 = 65\text{ kg}), determining the total daily dose (65×15=975 mg65 \times 15 = 975\text{ mg}), dividing by two for a single dose (975÷2=487.5 mg975 \div 2 = 487.5\text{ mg}), calculating the required liquid volume (487.5×5250=9.75 mL487.5 \times \frac{5}{250} = 9.75\text{ mL}), and correctly rounding 9.759.75 to the nearest tenth to yield 9.89.8.

Adım Adım Çözüm

1
Convert the client's weight from pounds (lb) to kilograms (kg).
143 lb÷2.2 lb/kg=65 kg143\text{ lb} \div 2.2\text{ lb/kg} = 65\text{ kg}
Weight-based medication dosages require the client's weight to be in kilograms.
2
Calculate the total daily dose in milligrams (mg).
65 kg×15 mg/kg/day=975 mg/day65\text{ kg} \times 15\text{ mg/kg/day} = 975\text{ mg/day}
The prescription specifies 15 mg15\text{ mg} per kilogram for the entire 24-hour period.
3
Calculate the amount for a single dose.
975 mg/day÷2 doses=487.5 mg/dose975\text{ mg/day} \div 2\text{ doses} = 487.5\text{ mg/dose}
The total daily amount must be divided into two equal doses as prescribed.
4
Calculate the volume (mL) to administer based on the pharmacy concentration.
487.5 mg250 mg×5 mL=1.95×5 mL=9.75 mL\frac{487.5\text{ mg}}{250\text{ mg}} \times 5\text{ mL} = 1.95 \times 5\text{ mL} = 9.75\text{ mL}
Dimensional analysis is used to convert the ordered dose in milligrams to the deliverable volume in milliliters.
5
Round the final answer to the nearest tenth.
9.75 mL→9.8 mL9.75\text{ mL} \rightarrow 9.8\text{ mL}
The question explicitly asks to record the answer to the nearest tenth. Because the hundredths digit is 5, round up.

Anahtar Kavram

Weight-based dosage calculation, unit conversion, and liquid medication administration via enteral tube.
Soru 43Soru →

A client with hypokalemia is prescribed potassium chloride 40 mEq40\text{ mEq} by mouth daily. The pharmacy supplies an oral liquid labeled 20 mEq/15 mL20\text{ mEq}/15\text{ mL}. How many mL should the nurse administer per dose? (Record your answer as a whole number. Do not include units in your answer.)

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Cevap: 30

Cevap

30
To determine the correct volume to administer, the prescribed dose (40 mEq40\text{ mEq}) is divided by the available dose (20 mEq20\text{ mEq}) and then multiplied by the supplied volume (15 mL15\text{ mL}). The calculation is (40/20)×15=30(40 / 20) \times 15 = 30. Therefore, the nurse should administer 30 mL30\text{ mL}.

Adım Adım Çözüm

1
Identify the desired dose prescribed by the healthcare provider.
Desired dose = 40 mEq40\text{ mEq}.
This is the target amount of medication the client needs to receive.
2
Identify the available concentration supplied by the pharmacy.
Have = 20 mEq20\text{ mEq}, Volume = 15 mL15\text{ mL}.
These values are required to determine how much liquid contains the target dose.
3
Set up the dimensional analysis or desired-over-have formula: DesiredHave×Volume\frac{\text{Desired}}{\text{Have}} \times \text{Volume}.
40 mEq20 mEq×15 mL\frac{40\text{ mEq}}{20\text{ mEq}} \times 15\text{ mL}
This formula accurately converts the prescribed dose into the deliverable liquid volume.
4
Perform the calculation.
2×15 mL=30 mL2 \times 15\text{ mL} = 30\text{ mL}.
Dividing 4040 by 2020 yields 22. Multiplying 22 by the volume of 1515 yields the final answer of 3030.

Anahtar Kavram

Liquid oral dosage calculation
Soru 44Soru →

A healthcare provider prescribes levothyroxine 0.05 mg0.05\text{ mg} orally once daily for a client managed for hypothyroidism. The medication drawer contains levothyroxine 25 mcg25\text{ mcg} tablets. How many tablets should the practical nurse administer for the scheduled dose? Record the answer as a whole number. Do not include units in the answer.

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Cevap: 2

Cevap

The practical nurse should administer 2 tablets.
To safely calculate the dose, the prescribed amount (0.05 mg0.05\text{ mg}) must first be converted to the same unit as the available medication (25 mcg25\text{ mcg} tablets). Multiplying 0.05 mg0.05\text{ mg} by 10001000 yields 50 mcg50\text{ mcg}. Using the standard formula (Desired divided by Have), 50 mcg50\text{ mcg} divided by 25 mcg25\text{ mcg} equals 22 tablets.

Adım Adım Çözüm

1
Convert the prescribed dose to match the unit of the available medication.
0.05 mg=50 mcg0.05\text{ mg} = 50\text{ mcg}
Safe medication administration requires calculations to be performed using the same unit of measurement.
2
Calculate the number of tablets using the standard dosage formula.
50 mcg25 mcg×1 tablet=2 tablets\frac{50\text{ mcg}}{25\text{ mcg}} \times 1\text{ tablet} = 2\text{ tablets}
This determines the exact physical quantity to administer to the client to achieve the prescribed dose.

Anahtar Kavram

Basic unit conversion and oral dosage calculation
Tahmini Süre:1m 0s
Soru 45Soru →

A practical nurse (PN) is preparing to administer a scheduled dose of amoxicillin/clavulanate to a pediatric client diagnosed with acute otitis media. The client's current weight is 41.8 lbs41.8\text{ lbs}.

The primary health care provider's prescription reads: "Amoxicillin/clavulanate 45 mg/kg/day45\text{ mg/kg/day} PO divided in equal doses every 12 hours."

The pharmacy dispenses a bottle of amoxicillin/clavulanate powder for oral suspension. The reconstitution instructions on the label state: "Add 67 mL67\text{ mL} of purified water to the bottle in two parts to yield 100 mL100\text{ mL} of suspension. Each 5 mL5\text{ mL} of the reconstituted suspension contains 250 mg250\text{ mg} of amoxicillin."

How many mL should the PN administer for the morning dose? (Record your answer to the nearest tenth. Do not include units in your answer.)

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Cevap: 8.6

Cevap

8.6
To safely administer a weight-based pediatric medication, the practical nurse must systematically convert the weight to kilograms, determine the daily dose, divide by the frequency to find the single dose, calculate the volume based on the correct final concentration, and round appropriately. The total daily dose is 855 mg855\text{ mg}, meaning each of the two doses is 427.5 mg427.5\text{ mg}. Using the concentration of 250 mg250\text{ mg} in 5 mL5\text{ mL}, the exact calculated volume is 8.55 mL8.55\text{ mL}, which rounds to 8.6 mL8.6\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds (lbs) to kilograms (kg).
41.8 lbs÷2.2 lbs/kg=19 kg41.8\text{ lbs} \div 2.2\text{ lbs/kg} = 19\text{ kg}
The medication dosage is prescribed based on the client's weight in kilograms.
2
Calculate the total daily dose in milligrams (mg).
19 kg×45 mg/kg/day=855 mg/day19\text{ kg} \times 45\text{ mg/kg/day} = 855\text{ mg/day}
This establishes the total amount of medication the client needs to receive over a 24-hour period.
3
Determine the amount required for a single dose.
855 mg/day÷2 doses=427.5 mg/dose855\text{ mg/day} \div 2\text{ doses} = 427.5\text{ mg/dose}
The prescription states the medication is divided into equal doses every 12 hours, which means 2 doses per day.
4
Calculate the volume of the reconstituted suspension needed for one dose.
Using dimensional analysis: 427.5 mg×5 mL250 mg=8.55 mL427.5\text{ mg} \times \frac{5\text{ mL}}{250\text{ mg}} = 8.55\text{ mL}
The label indicates the final concentration is 250 mg250\text{ mg} per 5 mL5\text{ mL}. The diluent volume (67 mL67\text{ mL}) and total bottle volume (100 mL100\text{ mL}) are distractors and not used in this step.
5
Round the final volume to the nearest tenth as instructed.
8.55 mL8.55\text{ mL} rounds to 8.6 mL8.6\text{ mL}.
Standard medical rounding rules dictate that when the hundredths digit is 5 or greater, the tenths digit is rounded up.

Anahtar Kavram

Weight-based pediatric dosage calculation with reconstitution
Tahmini Süre:3m 0s
Soru 46Soru →

A practical nurse is preparing to administer a scheduled dose of potassium chloride oral solution to a client who is receiving diuretic therapy. The provider has prescribed 30 mEq30\text{ mEq} of potassium chloride by mouth daily. The pharmacy provides the medication in a bulk bottle labeled 20 mEq/15 mL20\text{ mEq}/15\text{ mL}.

How many mL\text{mL} should the nurse administer per dose? (Record the answer to the nearest tenth. Do not include units in the answer.)

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Cevap: 22.5

Cevap

22.5
To determine the correct volume to administer, the practical nurse uses the standard medication calculation formula: (Desired Dose/Available Dose)×Volume(\text{Desired Dose} / \text{Available Dose}) \times \text{Volume}. The desired dose prescribed is 30 mEq30\text{ mEq}, the available dose is 20 mEq20\text{ mEq}, and the volume those 20 mEq20\text{ mEq} are dissolved in is 15 mL15\text{ mL}. Dividing 3030 by 2020 equals 1.51.5. Multiplying 1.51.5 by the volume of 15 mL15\text{ mL} yields a final administrable volume of 22.5 mL22.5\text{ mL}.

Adım Adım Çözüm

1
Identify the prescribed desired dose and the available medication concentration.
Desired dose: 30 mEq30\text{ mEq}. Available: 20 mEq20\text{ mEq} per 15 mL15\text{ mL}.
Extracting the correct values from the prescription and medication label is the first necessary step for accurate dosage calculation.
2
Set up the calculation using the formula: (Desired/Have)×Volume=X(\text{Desired} / \text{Have}) \times \text{Volume} = X.
(30 mEq/20 mEq)×15 mL=X(30\text{ mEq} / 20\text{ mEq}) \times 15\text{ mL} = X
This formula ensures the unit of milliequivalents (mEq) cancels out, leaving the final answer in the requested unit of milliliters (mL).
3
Perform the mathematical operation to solve for X.
1.5×15 mL=22.5 mL1.5 \times 15\text{ mL} = 22.5\text{ mL}.
Solving the equation provides the exact volume the nurse needs to pour for the client.

Anahtar Kavram

Liquid Medication Dosage Calculation
Soru 47Soru →

A client with mild fluid retention is prescribed furosemide 30 mg30\text{ mg} by mouth every morning. The client's morning vital signs include a blood pressure of 122/78 mmHg122/78\text{ mmHg} and a heart rate of 76 beats/min76\text{ beats/min}, with a recent serum potassium level of 4.1 mEq/L4.1\text{ mEq/L}. The pharmacy delivers furosemide oral solution labeled 40 mg40\text{ mg} per 5 mL5\text{ mL}. How many milliliters (mL) should the practical nurse administer for the morning dose? Record your answer to the nearest tenth. Do not include units in your answer.

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Cevap: 3.8

Cevap

The practical nurse should administer 3.8 mL3.8\text{ mL} of the furosemide oral solution.
The correct answer is derived by applying the standard dosage calculation formula DesiredHave×Quantity\frac{\text{Desired}}{\text{Have}} \times \text{Quantity}. Substituting the given values (30 mg40 mg×5 mL\frac{30\text{ mg}}{40\text{ mg}} \times 5\text{ mL}) yields 3.75 mL3.75\text{ mL}. Rounding to the nearest tenth gives 3.83.8. The vital signs and potassium level provided (4.1 mEq/L4.1\text{ mEq/L}) are within normal limits, confirming it is safe for the practical nurse to proceed with the administration.

Adım Adım Çözüm

1
Identify the prescribed dose and available concentration from the scenario.
Desired = 30 mg30\text{ mg}, Have = 40 mg40\text{ mg}, Quantity = 5 mL5\text{ mL}.
Accurate extraction of clinical data is required before performing any medication calculation.
2
Apply the standard dosage calculation formula: DesiredHave×Quantity\frac{\text{Desired}}{\text{Have}} \times \text{Quantity}.
30 mg40 mg×5 mL=3.75 mL\frac{30\text{ mg}}{40\text{ mg}} \times 5\text{ mL} = 3.75\text{ mL}.
This formula determines the exact liquid volume needed to deliver the prescribed dose safely.
3
Round the final answer to the nearest tenth according to the instructions.
3.75 mL3.75\text{ mL} rounds to 3.8 mL3.8\text{ mL}.
Liquid medications measured in small syringes are typically rounded to the nearest tenth for precise administration, adhering to standard rounding rules where the hundredths place is 55 or greater.

Anahtar Kavram

Oral liquid dosage calculation using the Desired over Have formula.
Soru 48Soru →

A 6-year-old6\text{-year-old} client weighing 55 lb55\text{ lb} is admitted to the pediatric unit with a soft tissue infection. The client's vital signs are temperature 100.8∘F100.8^\circ\text{F} (38.2∘C38.2^\circ\text{C}), heart rate 110 beats/min110\text{ beats/min}, and blood pressure 98/64 mm Hg98/64\text{ mm Hg}. The client has no known drug allergies. The healthcare provider prescribes oral cephalexin 25 mg/kg/day25\text{ mg/kg/day} divided into two equal doses every 12 hours12\text{ hours}. The medication available is cephalexin oral suspension 250 mg/5 mL250\text{ mg}/5\text{ mL}. How many mL\text{mL} should the practical nurse administer per dose? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 6.3

Cevap

6.3
To safely administer this medication, the nurse must accurately compute a multi-step calculation. First, convert the child's weight to kilograms (55 lb÷2.2=25 kg55\text{ lb} \div 2.2 = 25\text{ kg}). Next, determine the total daily dose by multiplying the weight by the prescribed rate (25 kg×25 mg/kg=625 mg/day25\text{ kg} \times 25\text{ mg/kg} = 625\text{ mg/day}). Because the medication is divided into two equal doses given every 12 hours12\text{ hours}, divide the daily dose by 2 (625 mg÷2=312.5 mg/dose625\text{ mg} \div 2 = 312.5\text{ mg/dose}). Using dimensional analysis or the ratio-proportion method with the available concentration of 250 mg250\text{ mg} in 5 mL5\text{ mL}, the volume is calculated: (312.5 mg÷250 mg)×5 mL=6.25 mL(312.5\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 6.25\text{ mL}. Following the instruction to record the answer to the nearest tenth, 6.256.25 rounds up to 6.36.3.

Adım Adım Çözüm

1
Convert weight from pounds to kilograms.
25 kg25\text{ kg}
Pediatric weight-based dosages are calculated using metric weight.
2
Calculate the total daily dose prescribed.
625 mg/day625\text{ mg/day}
The prescription is for 25 mg/kg/day25\text{ mg/kg/day}.
3
Calculate the individual dose amount.
312.5 mg/dose312.5\text{ mg/dose}
The daily dose is divided into two equal doses given every 12 hours.
4
Calculate the volume needed per dose.
6.25 mL6.25\text{ mL}
The medication concentration is 250 mg250\text{ mg} per 5 mL5\text{ mL}.
5
Round the final volume to the nearest tenth.
6.3
Standard rounding rules dictate that a hundredths digit of 5 rounds the tenths digit up.

Anahtar Kavram

Pediatric Weight-Based Dosage Calculation
Soru 49Soru →

A practical nurse is caring for a pediatric client who weighs 60 lb 8 oz60\text{ lb } 8\text{ oz}. The health care provider originally prescribed valproic acid 18 mg/kg/day18\text{ mg/kg/day} PO divided into equal doses administered every 8 hours. Due to a recent subtherapeutic serum trough level, the provider wrote a new prescription to increase the client's total daily dose by 25%25\%. The pharmacy dispenses valproic acid oral syrup at a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}.

How many mL should the practical nurse administer for ONE dose? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 4.1

Cevap

4.1
The correct calculation requires converting the client's weight from pounds and ounces to kilograms, determining the base daily dose, applying a 25% increase, dividing that amount by 3 to account for the every 8-hour schedule, and finally using the pharmacy's supplied concentration to find the liquid volume per dose.

Adım Adım Çözüm

1
Convert the client's weight from pounds and ounces to kilograms.
27.5 kg27.5\text{ kg}
Since 16 ounces equal 1 pound, 8 ounces is 0.5 pounds, making the total weight 60.5 pounds. Dividing by 2.2 lb/kg yields the weight in kilograms (60.5÷2.2=27.560.5 \div 2.2 = 27.5).
2
Calculate the baseline total daily dose of valproic acid.
495 mg/day495\text{ mg/day}
Multiply the client's weight in kilograms by the prescribed base rate of 18 mg/kg/day18\text{ mg/kg/day} (27.5×18=49527.5 \times 18 = 495).
3
Calculate the newly prescribed increased total daily dose.
618.75 mg/day618.75\text{ mg/day}
The provider increased the dose by 25%25\%. Multiply the baseline daily dose by 1.25 (or add 25%25\% of 495) to find the new required daily amount (495×1.25=618.75495 \times 1.25 = 618.75).
4
Determine the amount of medication required for a single dose.
206.25 mg/dose206.25\text{ mg/dose}
The medication is scheduled to be administered every 8 hours, which equals 3 doses per 24-hour period (24÷8=324 \div 8 = 3). Divide the new total daily dose by 3 (618.75÷3=206.25618.75 \div 3 = 206.25).
5
Calculate the volume of oral syrup to administer for one dose.
4.125 mL4.125\text{ mL}
Use the desired over have formula: (Desired / Have) * Volume. The desired dose is 206.25 mg206.25\text{ mg}, and the supplied concentration is 250 mg250\text{ mg} per 5 mL5\text{ mL} ((206.25÷250)×5=4.125(206.25 \div 250) \times 5 = 4.125).
6
Round the final volume to the nearest tenth as instructed.
4.1 mL4.1\text{ mL}
The hundredths place is 2 (which is less than 5), so the tenths place remains unchanged.

Anahtar Kavram

Complex pediatric weight-based dosage calculation including percentage adjustments and fractionated daily dosing.
Soru 50Soru →

A practical nurse is preparing to administer a scheduled dose of gabapentin 300 mg300\text{ mg} PO to a client with neuropathic pain. The medication is supplied as an oral solution with a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}. How many milliliters should the nurse administer? (Record answer as a whole number. Do not include units in answer.)

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Cevap: 6

Cevap

6
To determine the correct volume to administer, the nurse uses the formula: (Desired / Have) \times Quantity. The desired dose is 300 mg300\text{ mg}, the available dose (Have) is 250 mg250\text{ mg}, and the Quantity is 5 mL5\text{ mL}. Therefore, (300 mg/250 mg)×5 mL=1.2×5 mL=6 mL(300\text{ mg} / 250\text{ mg}) \times 5\text{ mL} = 1.2 \times 5\text{ mL} = 6\text{ mL}. The practical nurse should administer 6 mL6\text{ mL} of the gabapentin oral solution.

Adım Adım Çözüm

1
Identify the prescribed dose and the available concentration.
Prescribed dose = 300 mg300\text{ mg}; Available concentration = 250 mg250\text{ mg} in 5 mL5\text{ mL}.
These values are required to set up the dosage calculation formula accurately.
2
Apply the basic dosage calculation formula: (Desired / Have) \times Quantity.
(300 mg250 mg)×5 mL\left( \frac{300\text{ mg}}{250\text{ mg}} \right) \times 5\text{ mL}
This formula determines the correct volume of medication to administer to achieve the prescribed dose.
3
Perform the calculation.
1.2×5 mL=6 mL1.2 \times 5\text{ mL} = 6\text{ mL}.
Mathematical computation provides the final volume in milliliters to administer.

Anahtar Kavram

Oral Dosage Calculation
Soru 51Soru →

A practical nurse is caring for an adult client who weighs 143 lb143\text{ lb} and is prescribed cyclosporine oral solution. The prescribed dosage is 8 mg/kg/day8\text{ mg/kg/day} divided into two equal doses. The pharmacy dispenses cyclosporine oral solution 100 mg/mL100\text{ mg/mL}. How many mL should the nurse administer for one dose?

Record your answer using one decimal place. Do not include units in your answer.

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Cevap: 2.6

Cevap

The practical nurse should administer 2.6 mL per dose.
To determine the correct volume, the client's weight must first be converted to kilograms (143 lb÷2.2=65 kg143\text{ lb} \div 2.2 = 65\text{ kg}). The total daily dose is calculated by multiplying the weight by the prescribed rate (65 kg×8 mg/kg=520 mg/day65\text{ kg} \times 8\text{ mg/kg} = 520\text{ mg/day}). Because the medication is divided into two equal doses, the single dose is 260 mg260\text{ mg} (520 mg÷2520\text{ mg} \div 2). Finally, using the available concentration of 100 mg/mL100\text{ mg/mL}, the required volume is 2.6 mL2.6\text{ mL} (260 mg÷100 mg/mL260\text{ mg} \div 100\text{ mg/mL}).

Adım Adım Çözüm

1
Convert pounds to kilograms.
143 lb÷2.2=65 kg143\text{ lb} \div 2.2 = 65\text{ kg}.
The prescribed dose is weight-based in kg, so the client's weight must first be converted.
2
Calculate the total daily dose.
65 kg×8 mg/kg=520 mg/day65\text{ kg} \times 8\text{ mg/kg} = 520\text{ mg/day}.
To find the total amount of medication required for a 24-hour period.
3
Determine the single dose amount.
520 mg÷2 doses=260 mg/dose520\text{ mg} \div 2\text{ doses} = 260\text{ mg/dose}.
The prescription states the daily dose is divided into two equal doses.
4
Calculate the liquid volume to administer.
(260 mg÷100 mg)×1 mL=2.6 mL260\text{ mg} \div 100\text{ mg}) \times 1\text{ mL} = 2.6\text{ mL}.
To determine how many mL provide the required single dose of 260 mg using the available concentration.

Anahtar Kavram

Weight-based dosage calculation and administration of divided doses.
Soru 52Soru →

A practical nurse is caring for a client with heart failure who receives enteral nutrition and medications via a percutaneous endoscopic gastrostomy (PEG) tube. The client's current weight is 73 kg73\text{ kg}. The health care provider prescribes a maintenance dose of digoxin oral solution at 6 mcg/kg6\text{ mcg/kg} daily. The pharmacy dispenses digoxin liquid with a concentration of 0.05 mg/mL0.05\text{ mg/mL}. Prior to administration, the nurse notes a regular apical pulse of 68 beats/min68\text{ beats/min} and a serum potassium level of 4.3 mEq/L4.3\text{ mEq/L}. How many milliliters will the nurse administer? Record answer to the nearest tenth. Do not include units in answer.

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Cevap: 8.8

Cevap

8.8
To safely administer this medication, the practical nurse must first verify that the apical pulse and potassium levels are within safe parameters. After verifying safety, the weight-based dose (438 mcg438\text{ mcg}) is calculated. Because the supplied liquid is measured in mg (0.05 mg/mL0.05\text{ mg/mL}), it must be converted to mcg (50 mcg/mL50\text{ mcg/mL}). Finally, dividing the needed dose by the concentration yields 8.76 mL8.76\text{ mL}, which rounds appropriately to 8.88.8.

Adım Adım Çözüm

1
Evaluate pre-administration assessment data.
The nurse determines it is safe to proceed with administration.
Digoxin requires an apical pulse of at least 60 beats/min in adults and normal potassium levels (3.5-5.0 mEq/L) to prevent toxicity.
2
Calculate the total required dose in micrograms (mcg).
73 kg×6 mcg/kg=438 mcg73\text{ kg} \times 6\text{ mcg/kg} = 438\text{ mcg}
The prescription is weight-based, requiring multiplication of the client's weight in kg by the prescribed mcg/kg dose.
3
Convert the available concentration to matching units (mcg).
0.05 mg=50 mcg0.05\text{ mg} = 50\text{ mcg}, making the concentration 50 mcg/mL50\text{ mcg/mL}.
Dosage calculations require the ordered dose and the available dose to be in the same unit of measurement before division.
4
Calculate the volume in milliliters (mL).
438 mcg÷50 mcg/mL=8.76 mL438\text{ mcg} \div 50\text{ mcg/mL} = 8.76\text{ mL}
Dividing the desired dose by the available concentration yields the required liquid volume.
5
Round to the nearest tenth.
8.8
The question specifically requests the final answer to be recorded to the nearest tenth without units.

Anahtar Kavram

Weight-based dosage calculations, unit conversions, and pre-administration safety checks for cardiac glycosides.
Soru 53Soru →

A practical nurse is preparing to administer the morning dose of a prescribed oral antibiotic to a pediatric client. The child weighs 35 lb 4 oz35\text{ lb } 4\text{ oz}. The primary health care provider has prescribed cefdinir 14 mg/kg/day14\text{ mg/kg/day} PO to be administered in two equally divided doses. The pharmacy dispenses cefdinir oral suspension with a concentration of 125 mg/5 mL125\text{ mg}/5\text{ mL}. How many mL\text{mL} should the nurse administer for the morning dose? (Record the answer to the nearest tenth. Do not include units in your answer.)

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Cevap: 4.5

Cevap

4.5
The correct calculation requires six sequential steps: accurately representing ounces as a decimal of a pound, converting to kilograms, finding the total daily dosage, splitting it into a single dose, computing the volume using the provided concentration, and rounding to the nearest tenth.

Adım Adım Çözüm

1
Convert the client's fractional weight from ounces to pounds.
4 oz÷16 oz/lb=0.25 lb4\text{ oz} \div 16\text{ oz/lb} = 0.25\text{ lb}. Total weight is 35.25 lb35.25\text{ lb}.
Weight must be in a standard decimal format before converting to kilograms.
2
Convert the weight from pounds to kilograms.
35.25 lb÷2.2 lb/kg=16.022... kg35.25\text{ lb} \div 2.2\text{ lb/kg} = 16.022...\text{ kg}, which rounds to 16.0 kg16.0\text{ kg}.
The medication dosage is prescribed based on the client's weight in kilograms.
3
Calculate the total daily medication requirement.
16.0 kg×14 mg/kg/day=224 mg/day16.0\text{ kg} \times 14\text{ mg/kg/day} = 224\text{ mg/day}.
This establishes the maximum therapeutic amount the child should receive over a 24-hour period.
4
Calculate the individual dose amount.
224 mg/day÷2=112 mg/dose224\text{ mg/day} \div 2 = 112\text{ mg/dose}.
The order specifies administration in two equally divided doses, not as a single bolus.
5
Determine the liquid volume required for the single dose.
(112 mg÷125 mg)×5 mL=4.48 mL(112\text{ mg} \div 125\text{ mg}) \times 5\text{ mL} = 4.48\text{ mL}.
This matches the ordered dose to the available physical concentration provided by the pharmacy.
6
Round the final answer according to instructions.
4.48 mL4.48\text{ mL} rounds up to 4.5 mL4.5\text{ mL}.
Standard medication calculation rules and the stem's instructions require rounding to the nearest tenth for volumes greater than 1 mL1\text{ mL}.

Anahtar Kavram

Multi-step pediatric weight-based dosage calculation requiring unit conversion, fractioned dosing, and liquid concentration computation.
Soru 54Soru →

An adult client is prescribed cefazolin 0.75 g0.75\text{ g} intramuscularly for surgical prophylaxis. The medication is supplied as a 1 g1\text{ g} vial of dry powder. The manufacturer's instructions state to reconstitute the powder by adding 2.0 mL2.0\text{ mL} of sterile water for injection, yielding a total volume of 2.5 mL2.5\text{ mL} with a final concentration of 400 mg/mL400\text{ mg/mL}. How many mL\text{mL} should be administered to the client? (Record the answer to the nearest tenth. Do not include units in your answer.)

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Cevap: 1.9

Cevap

1.9
To determine the correct volume, the prescribed dose must first be converted to match the available unit: 0.75 g=750 mg0.75\text{ g} = 750\text{ mg}. When a final concentration is provided (400 mg/mL400\text{ mg/mL}), the diluent amount and total volume become extraneous information. Using the standard formula, divide the desired dose (750 mg750\text{ mg}) by the available concentration (400 mg400\text{ mg}) and multiply by the base volume (1 mL1\text{ mL}), which equals 1.875 mL1.875\text{ mL}. Rounding to the nearest tenth yields 1.9 mL1.9\text{ mL}.

Adım Adım Çözüm

1
Convert the prescribed dose from grams to milligrams.
0.75 g×1000 mg/g=750 mg0.75\text{ g} \times 1000\text{ mg/g} = 750\text{ mg}.
The available concentration is provided in milligrams, so the prescribed dose must be in the same unit of measurement.
2
Identify the final medication concentration from the provided instructions.
The final concentration is 400 mg/mL400\text{ mg/mL}.
Extraneous information such as the diluent volume (2.0 mL2.0\text{ mL}) and total reconstituted volume (2.5 mL2.5\text{ mL}) should be ignored when the final concentration is explicitly provided.
3
Calculate the volume to administer.
750 mg400 mg×1 mL=1.875 mL\frac{750\text{ mg}}{400\text{ mg}} \times 1\text{ mL} = 1.875\text{ mL}.
This formula determines the exact liquid volume containing the required dose.
4
Round the final answer to the nearest tenth.
1.875 mL1.875\text{ mL} rounds to 1.9 mL1.9\text{ mL}.
Standard rounding rules state that if the hundredths digit is 5 or greater, the tenths digit is rounded up.

Anahtar Kavram

Medication Reconstitution and Dosage Calculation
Soru 55Soru →

A school-aged child weighing 4444 lb is receiving care in an outpatient clinic for a severe skin infection. The healthcare provider prescribes clindamycin 2424 mg/kg/day orally, to be divided into equal doses administered every 88 hours. The clinic pharmacy dispenses clindamycin oral suspension at a concentration of 7575 mg/55 mL. How many mL should the practical nurse administer for a single dose? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 10.7

Cevap

10.7
To determine the correct administration volume, the practical nurse must first ensure the client's weight is in kilograms (4444 lb ÷2.2=20\div 2.2 = 20 kg). Next, the total daily dose is calculated by multiplying the weight by the prescribed rate (2020 kg ×24\times 24 mg/kg/day = 480480 mg/day). Because the prescription states the medication is to be administered every 88 hours, there are 33 administration times per day. The single dose amount is 480480 mg ÷3=160\div 3 = 160 mg/dose. Finally, using the desired over have formula multiplied by the vehicle (160160 mg ÷75\div 75 mg ×5\times 5 mL), the total volume per dose is calculated as 10.666...10.666... mL. Following standard rounding rules to the nearest tenth, the final answer is 10.710.7 mL.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
2020 kg
Weight-based medication dosing requires the client's weight to be in kilograms. (4444 lb ÷2.2\div 2.2 lb/kg = 2020 kg)
2
Calculate the total daily dose of the prescribed medication.
480480 mg/day
The prescribed dosage rate is 2424 mg/kg/day. Multiply the client's weight by this rate: 2020 kg ×24\times 24 mg/kg = 480480 mg for the entire day.
3
Determine the amount of medication required for a single dose.
160160 mg/dose
The medication is ordered to be administered every 88 hours, which equates to 33 doses in a 2424-hour period (24÷8=324 \div 8 = 3). Divide the total daily dose by 33: 480480 mg ÷3\div 3 doses = 160160 mg per dose.
4
Calculate the liquid volume to administer using the available pharmacy concentration.
10.666...10.666... mL
Use the formula (Desired ÷\div Have) ×\times Vehicle. The desired dose is 160160 mg, the available strength is 7575 mg, and the vehicle volume is 55 mL. (160160 mg ÷75\div 75 mg) ×5\times 5 mL = 10.666...10.666... mL.
5
Round the calculated volume to the nearest tenth as instructed.
10.710.7 mL
The digit in the hundredths place is 66, which means you round the tenths digit up from 66 to 77, resulting in a final answer of 10.710.7.

Anahtar Kavram

Pediatric weight-based dosage calculation and liquid oral suspension conversion.
Soru 56Soru →

A practical nurse (PN) is preparing to administer a prescribed dose of cefdinir oral suspension to a pediatric client with acute otitis media. The client's weight is 27 pounds 8 ounces. The provider's prescription reads: cefdinir 14 mg/kg/day by mouth, divided in equal doses every 12 hours. The pharmacy supplies a bottle of cefdinir powder for oral suspension. The reconstitution instructions on the label state: "Add 38 mL of sterile water to the bottle to yield a final concentration of 125 mg/5 mL." How many milliliters (mL) should the PN administer for a single dose? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 3.5

Cevap

3.5
To determine the correct volume to administer, the nurse must execute four specific calculations. First, convert the weight of 27 pounds 8 ounces to kilograms (27.5 lbs÷2.2=12.5 kg27.5\text{ lbs} \div 2.2 = 12.5\text{ kg}). Second, calculate the total daily dose (12.5 kg×14 mg/kg/day=175 mg/day12.5\text{ kg} \times 14\text{ mg/kg/day} = 175\text{ mg/day}). Third, divide the daily dose by the frequency (every 12 hours = 2 doses per day; 175 mg÷2=87.5 mg/dose175\text{ mg} \div 2 = 87.5\text{ mg/dose}). Finally, use dimensional analysis with the reconstituted concentration (125 mg125\text{ mg} in 5 mL5\text{ mL}) to find the volume: (87.5 mg125 mg\frac{87.5\text{ mg}}{125\text{ mg}}) ×5 mL=3.5 mL\times 5\text{ mL} = 3.5\text{ mL}. The 38 mL38\text{ mL} of diluent is distractor information required only during the actual mixing process.

Adım Adım Çözüm

1
Convert the client's weight from pounds and ounces to kilograms.
12.5
Weight-based dosing requires the client's weight in kilograms. 88 ounces is 0.50.5 pounds (8÷168 \div 16), making the total weight 27.527.5 pounds. Dividing 27.527.5 by 2.22.2 yields 12.5 kg12.5\text{ kg}.
2
Calculate the total daily dose in milligrams.
175
Multiply the prescribed dose of 14 mg/kg/day14\text{ mg/kg/day} by the client's weight of 12.5 kg12.5\text{ kg} to get 175 mg/day175\text{ mg/day}.
3
Calculate the single dose amount.
87.5
The total daily dose is divided every 12 hours, which means 2 doses per day. 175 mg175\text{ mg} divided by 2 equals 87.5 mg87.5\text{ mg} per dose.
4
Calculate the volume of the single dose using the final concentration.
3.5
Using the final reconstituted concentration of 125 mg125\text{ mg} per 5 mL5\text{ mL}: 87.5 mg125 mg×5 mL=3.5 mL\frac{87.5\text{ mg}}{125\text{ mg}} \times 5\text{ mL} = 3.5\text{ mL}.

Anahtar Kavram

Pediatric Weight-Based Dosage Calculation with Reconstitution
Soru 57Soru →

A practical nurse is assigned to a client whose morning laboratory results indicate a serum potassium level of 3.1 mEq/L3.1\text{ mEq/L}. The health care provider prescribes a one-time dose of potassium chloride 45 mEq45\text{ mEq} orally. The medication is supplied in a bulk bottle as an oral solution containing 20 mEq/15 mL20\text{ mEq}/15\text{ mL}. How many milliliters of the medication should the nurse pour to administer this dose? (Record your answer to the nearest tenth. Do not include units in your answer.)

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Cevap: 33.8

Cevap

33.8
To calculate the correct administration volume for an oral liquid, use the formula: (Desired Dose/Dose on Hand)×Volume(\text{Desired Dose} / \text{Dose on Hand}) \times \text{Volume}. The desired dose prescribed is 45 mEq45\text{ mEq}. The dose on hand is 20 mEq20\text{ mEq}, which is contained in a volume of 15 mL15\text{ mL}. Plugging these values into the formula yields: (4520)×15=2.25×15=33.75 mL(\frac{45}{20}) \times 15 = 2.25 \times 15 = 33.75\text{ mL}. According to standard clinical rounding rules, because the hundredths digit is a 55, the value is rounded up to the nearest tenth, resulting in 33.8 mL33.8\text{ mL}.

Adım Adım Çözüm

1
Identify the prescribed dose (Desired).
The desired dose is 45 mEq45\text{ mEq}.
This is the specific amount of potassium chloride ordered by the health care provider.
2
Identify the concentration of the available medication (Have and Volume).
The medication on hand is 20 mEq20\text{ mEq} per 15 mL15\text{ mL}.
This information is needed to set up the dosage calculation equation.
3
Set up the dosage calculation equation.
45 mEq20 mEq×15 mL=X mL\frac{45\text{ mEq}}{20\text{ mEq}} \times 15\text{ mL} = X\text{ mL}.
The standard formula for liquid medication calculation is (Desired/Have)×Volume(\text{Desired} / \text{Have}) \times \text{Volume}.
4
Perform the calculation and round to the nearest tenth.
2.25×15=33.75 mL2.25 \times 15 = 33.75\text{ mL}, which rounds to 33.8 mL33.8\text{ mL}.
Standard rounding rules state that if the digit to the right of the target decimal place is 5 or higher, round up.

Anahtar Kavram

Medication dosage calculation for oral liquids using the desired over have formula
Soru 58Soru →

A practical nurse is preparing to administer phenytoin oral suspension to a client with a seizure disorder. The provider's prescription is for phenytoin 150 mg150\text{ mg} PO every 12 hours. The medication label indicates a concentration of 125 mg/5 mL125\text{ mg}/5\text{ mL}.

How many mL\text{mL} should the nurse administer for one dose? (Record the answer as a whole number. Do not include units in your answer.)

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Cevap: 6

Cevap

6
To calculate the correct volume of medication to administer, the nurse uses the formula: Desired DoseDose on Hand×Quantity\frac{\text{Desired Dose}}{\text{Dose on Hand}} \times \text{Quantity}. Substituting the known values, the calculation is 150 mg125 mg×5 mL=1.2×5 mL=6 mL\frac{150\text{ mg}}{125\text{ mg}} \times 5\text{ mL} = 1.2 \times 5\text{ mL} = 6\text{ mL}. Therefore, the nurse should administer 6 mL6\text{ mL} per dose.

Adım Adım Çözüm

1
Identify the known variables for the dosage calculation.
Desired (D) = 150 mg150\text{ mg}, Have (H) = 125 mg125\text{ mg}, Quantity (Q) = 5 mL5\text{ mL}.
Correctly identifying the prescription and medication label information is essential before performing any math.
2
Set up the dosage calculation formula.
150 mg125 mg×5 mL\frac{150\text{ mg}}{125\text{ mg}} \times 5\text{ mL}
Using the standard dimensional analysis or desired-over-have method ensures accurate dose calculation.
3
Perform the mathematical calculation.
1.2×5 mL=6 mL1.2 \times 5\text{ mL} = 6\text{ mL}
Solving the equation provides the final volume to be administered.

Anahtar Kavram

Oral Dosage Calculation
Tahmini Süre:1m 0s
Soru 59Soru →

A pediatric client who weighs 28.6 lb28.6\text{ lb} is being treated for a severe bacterial infection. The primary health care provider prescribes oral amoxicillin at a dosage of 40 mg/kg/day40\text{ mg/kg/day} to be administered in equally divided doses every 8 hours8\text{ hours}. The medication bottle states a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL} after reconstitution. How many milliliters should the practical nurse administer for a single dose? (Record the answer to the nearest tenth. Do not include units in the answer.)

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Cevap: 3.5

Cevap

3.5
To solve this calculation, first convert pounds to kilograms: 28.6 lb÷2.2 lb/kg=13 kg28.6\text{ lb} \div 2.2\text{ lb/kg} = 13\text{ kg}. Next, determine the total daily dose: 13 kg×40 mg/kg/day=520 mg/day13\text{ kg} \times 40\text{ mg/kg/day} = 520\text{ mg/day}. Because the medication is prescribed every 8 hours, it is administered 3 times per 24 hours. The single dose is 520 mg÷3=173.33 mg/dose520\text{ mg} \div 3 = 173.33\text{ mg/dose}. Using the concentration of 250 mg250\text{ mg} per 5 mL5\text{ mL}, the volume to administer is (173.33 mg÷250 mg)×5 mL=3.466 mL(173.33\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 3.466\text{ mL}. Rounding to the nearest tenth yields 3.5 mL3.5\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
13 kg13\text{ kg}
The prescribed dosage is weight-based in mg/kg, so the weight must be in kilograms (28.6÷2.2=1328.6 \div 2.2 = 13).
2
Calculate the total daily dose of the medication.
520 mg/day520\text{ mg/day}
Multiply the client's weight in kg by the prescribed daily dosage (13×40=52013 \times 40 = 520).
3
Determine the amount of medication required for a single dose.
173.33 mg/dose173.33\text{ mg/dose}
The order states every 8 hours, which means 3 times a day (24 / 8 = 3). Divide the total daily dose by 3 (520÷3=173.333...520 \div 3 = 173.333...).
4
Calculate the volume needed for one dose and round to the nearest tenth.
3.5 mL3.5\text{ mL}
Use the available concentration (250 mg/5 mL250\text{ mg}/5\text{ mL}) to find the volume: (173.33÷250)×5=3.466 mL(173.33 \div 250) \times 5 = 3.466\text{ mL}. Rounding to the nearest tenth gives 3.53.5.

Anahtar Kavram

Weight-based pediatric dosage calculation and conversion
Soru 60Soru →

An 1111-month-old infant is admitted with acute otitis media. The infant weighs 1818 lb 1212 oz. The primary healthcare provider prescribes amoxicillin-clavulanate 4545 mg/kg/day by mouth, in equally divided doses every 88 hours. The pharmacy supplies amoxicillin-clavulanate oral suspension with a concentration of 200200 mg/55 mL.

How many milliliters will the practical nurse administer for a single dose?
*(Record your answer to the nearest tenth. Do not include units in your answer.)*

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Cevap: 3.2

Cevap

3.2
The correct calculation requires converting the infant's weight to kilograms accurately (including converting ounces to a fraction of a pound), calculating the weight-based daily dose, dividing by the frequency of administration to find the individual dose, and finally converting the ordered dose to a volume based on the supplied concentration, rounding only at the final step to prevent compounding rounding errors.

Adım Adım Çözüm

1
Convert the infant's weight from ounces to pounds.
The total weight is 18.75 lb.
Standard weight conversion is required because 16 ounces equal 1 pound.
2
Convert the weight from pounds to kilograms.
The infant weighs 8.5227 kg.
The medication dosage is prescribed based on body weight in kilograms.
3
Calculate the total daily medication dose in milligrams.
The total daily dose is 383.5227 mg.
Multiplying the infant's weight in kg by the prescribed 45 mg/kg/day yields the 24-hour dose requirement.
4
Determine the amount of medication required for a single dose.
A single dose is 127.8409 mg.
The medication is given every 8 hours, which equals 3 divided doses per day.
5
Calculate the liquid volume to administer per dose based on the pharmacy supply.
The calculated volume is 3.196 mL.
Using the desired-over-have formula with the 200 mg / 5 mL concentration determines the volume.
6
Round the final calculated volume to the nearest tenth.
3.2
Standard rounding rules apply; since the hundredths place is 9, round up the tenths place.

Anahtar Kavram

Weight-Based Pediatric Dosage Calculation
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Tüm alıştırma soruları — NCLEX-PN | Examkin