Tüm alıştırma soruları

68 soru

Soru 1Soru →

A practical nurse is preparing to administer an oral suspension to a client who weighs 154 lb154\text{ lb}. The healthcare provider has prescribed 15 mg/kg/day15\text{ mg/kg/day} to be administered in two equally divided doses. The pharmacy dispenses the medication with a concentration of 0.25 g/5 mL0.25\text{ g/5 mL}. How many mL\text{mL} should the practical nurse administer for each dose? Record your answer to the nearest tenth. Do not include units in your answer.

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Cevap: 10.5

Cevap

10.5
To arrive at the correct answer of 10.510.5, the practical nurse must systematically process multiple conversions. First, the client's weight is converted to kilograms (154÷2.2=70 kg154 \div 2.2 = 70\text{ kg}). Next, the total daily dose is calculated (70×15=1050 mg/day70 \times 15 = 1050\text{ mg/day}). Because the medication is divided into two equal doses, the single dose requirement is 525 mg525\text{ mg}. Before calculating the volume, the dispensed concentration of 0.25 g/5 mL0.25\text{ g/5 mL} must be converted to milligrams (0.25×1000=250 mg/5 mL0.25 \times 1000 = 250\text{ mg/5 mL}). Finally, using the desired over have formula: (525 mg÷250 mg)×5 mL(525\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} equals exactly 10.5 mL10.5\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
154 lb÷2.2 lb/kg=70 kg154\text{ lb} \div 2.2\text{ lb/kg} = 70\text{ kg}
Weight-based dosing requires the client's weight in kilograms.
2
Calculate the total daily dose in milligrams.
70 kg×15 mg/kg/day=1050 mg/day70\text{ kg} \times 15\text{ mg/kg/day} = 1050\text{ mg/day}
This establishes the total amount of medication the client needs over a 24-hour period.
3
Determine the amount required for a single dose.
1050 mg/day÷2 doses=525 mg/dose1050\text{ mg/day} \div 2\text{ doses} = 525\text{ mg/dose}
The prescription specifies two equally divided doses per day.
4
Convert the supplied medication concentration from grams to milligrams.
0.25 g×1000 mg/g=250 mg0.25\text{ g} \times 1000\text{ mg/g} = 250\text{ mg}. The available concentration is 250 mg250\text{ mg} per 5 mL5\text{ mL}.
Units of measurement must match between the desired dose (mg) and the available medication supply (g) before calculating volume.
5
Calculate the volume to administer for a single dose.
(525 mg÷250 mg)×5 mL=2.1×5 mL=10.5 mL(525\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 2.1 \times 5\text{ mL} = 10.5\text{ mL}
Applying the standard dimensional analysis or 'Desired over Have times Volume' formula yields the exact volume to administer.

Anahtar Kavram

Multi-step dosage calculation involving weight conversion, frequency division, and unit conversion.
Soru 2Soru →

A practical nurse is preparing to administer amoxicillin oral suspension to a pediatric client diagnosed with acute otitis media. The client weighs 4444 lb. The healthcare provider has prescribed 45 mg/kg/day45\text{ mg/kg/day} to be divided into three equal doses administered every 88 hours. The pharmacy supplies amoxicillin suspension at a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}. How many milliliters (mL) should the nurse administer for a single dose? (Record answer to the nearest whole number. Do not include units in answer.)

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Cevap: 6

Cevap

6
To determine the correct dose, the nurse must first convert the weight from pounds to kilograms by dividing by 2.22.2 (44÷2.2=20 kg44 \div 2.2 = 20\text{ kg}). Next, calculate the total daily dose by multiplying the weight by the prescribed dose (20 kg×45 mg/kg=900 mg/day20\text{ kg} \times 45\text{ mg/kg} = 900\text{ mg/day}). Since the medication is divided into three equal doses (every 8 hours), each individual dose is 300 mg300\text{ mg} (900÷3900 \div 3). Finally, using the supplied concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}, calculate the required volume: (300 mg÷250 mg)×5 mL=6 mL(300\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 6\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
44 lb÷2.2 lb/kg=20 kg44\text{ lb} \div 2.2\text{ lb/kg} = 20\text{ kg}
Weight-based medication dosages require the client's weight to be in kilograms.
2
Calculate the total daily dose prescribed.
20 kg×45 mg/kg=900 mg/day20\text{ kg} \times 45\text{ mg/kg} = 900\text{ mg/day}
This establishes the total amount of medication the client should receive over a 24-hour period.
3
Determine the amount required for a single dose.
900 mg÷3 doses=300 mg/dose900\text{ mg} \div 3\text{ doses} = 300\text{ mg/dose}
The prescription states the daily dose must be divided into three equal doses (every 8 hours).
4
Calculate the volume of liquid to administer per dose.
300 mg250 mg×5 mL=6 mL\frac{300\text{ mg}}{250\text{ mg}} \times 5\text{ mL} = 6\text{ mL}
This uses the supplied concentration (250 mg250\text{ mg} per 5 mL5\text{ mL}) to find the correct liquid volume to administer.

Anahtar Kavram

Pediatric weight-based dosage calculation and safe medication administration
Soru 3Soru →

Before administering a PRN antipyretic, a practical nurse calculates the maximum safe dosage for a pediatric client weighing 3838 lb 88 oz. The healthcare provider's prescription reads: acetaminophen 1515 mg/kg/dose PO every 66 hours PRN for a temperature greater than 101.5∘F101.5^\circ\text{F} (38.6∘C38.6^\circ\text{C}). The unit's medication supply contains acetaminophen oral suspension with a concentration of 160160 mg/55 mL. What is the maximum total volume, in mL, that the practical nurse can safely administer to this client in a 2424-hour period?

(Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 32.8

Cevap

32.8
The correct safe administration volume is calculated through a multi-step conversion process. First, the client's weight is accurately converted to kilograms (3838 lb 88 oz is 38.538.5 lb, which equals 17.517.5 kg). Next, the single dose is found by multiplying the weight by the prescribed dosage (17.517.5 kg ×15\times 15 mg/kg = 262.5262.5 mg). Because the medication can be given every 66 hours, there is a maximum of 44 doses in 2424 hours, making the total daily dose 1,0501,050 mg. Finally, using the supplied concentration of 160160 mg/55 mL, the volume is calculated as (1,0501,050 mg ÷160\div 160 mg) ×5\times 5 mL = 32.812532.8125 mL, which rounds exactly to 32.832.8 mL.

Adım Adım Çözüm

1
Convert the client's weight into total pounds.
88 oz ÷16\div 16 oz/lb = 0.50.5 lb. Total weight = 3838 lb + 0.50.5 lb = 38.538.5 lb.
Ounces must be converted to a decimal fraction of a pound before converting to kilograms.
2
Convert the weight from pounds to kilograms.
38.538.5 lb ÷2.2\div 2.2 lb/kg = 17.517.5 kg.
The prescribed medication dosage is weight-based in kilograms.
3
Calculate the exact amount of medication required for a single dose.
17.517.5 kg ×15\times 15 mg/kg = 262.5262.5 mg/dose.
This establishes the therapeutic dose in milligrams for one administration.
4
Calculate the maximum number of doses allowed in a 24-hour period.
2424 hours ÷6\div 6 hours = 44 doses.
The medication is ordered every 6 hours, which limits administration to a maximum of 4 times per day.
5
Calculate the total daily dose in milligrams.
262.5262.5 mg/dose ×4\times 4 doses = 1,0501,050 mg.
This determines the maximum cumulative amount of the drug permitted in 24 hours.
6
Calculate the corresponding liquid volume for the total daily dose.
(1,0501,050 mg ÷160\div 160 mg) ×5\times 5 mL = 32.812532.8125 mL.
This converts the required milligrams into the administerable volume based on the pharmacy's supplied concentration.
7
Round the final answer to the nearest tenth.
32.812532.8125 mL rounds to 32.832.8.
Clinical standards and question instructions strictly require rounding to the nearest tenth of a milliliter.

Anahtar Kavram

Weight-based pediatric dosage calculation and liquid concentration conversion.
Soru 4Soru →

An 8-year-old client weighing 39.6 lb39.6\text{ lb} is being treated for a severe respiratory infection in an outpatient clinic. The healthcare provider prescribes cefdinir oral suspension at 40 mg/kg/day40\text{ mg/kg/day} to be administered in equally divided doses every 8 hours8\text{ hours}. The pharmacy dispenses a reconstituted suspension with a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}. How many milliliters will the 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: 4.8

Cevap

4.8
The correct calculation requires sequential conversion: establishing the weight in kg, determining the 24-hour milligram total, dividing by the number of daily administrations (every 8 hours = 3 doses), and utilizing dimensional analysis with the dispensed concentration to find the liquid volume per dose.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
18 kg18\text{ kg}
The medication dosage is prescribed in mg/kg, requiring the weight to be in metric units (39.6 lb÷2.2=18 kg39.6\text{ lb} \div 2.2 = 18\text{ kg}).
2
Calculate the total daily medication requirement.
720 mg/day720\text{ mg/day}
Multiply the client's weight in kg by the daily dosage rate (18 kg×40 mg/kg/day=720 mg/day18\text{ kg} \times 40\text{ mg/kg/day} = 720\text{ mg/day}).
3
Calculate the amount of medication required for a single dose.
240 mg/dose240\text{ mg/dose}
The medication is given every 8 hours, which equals 3 doses per 24-hour period. Divide the daily total by 3 (720 mg÷3=240 mg/dose720\text{ mg} \div 3 = 240\text{ mg/dose}).
4
Calculate the volume in milliliters to administer for one dose.
4.8 mL4.8\text{ mL}
Use the formula (Desired / Have) * Volume. (240 mg÷250 mg)×5 mL=0.96×5 mL=4.8 mL(240\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 0.96 \times 5\text{ mL} = 4.8\text{ mL}.

Anahtar Kavram

Weight-based pediatric dosage calculation and liquid medication volume conversion.
Tahmini Süre:2m 0s
Soru 5Soru →

A pediatric client diagnosed with acute otitis media is receiving care in a clinic. The practical nurse (PN) reviews the electronic health record:

Vital Signs & Measurements:
Temperature: 101.4∘F101.4^\circ\text{F} (38.6∘C38.6^\circ\text{C})
Weight: 35.2 lb35.2\text{ lb}
Allergies: Penicillin (mild rash)

Provider Prescriptions:
Ceftriaxone 50 mg/kg/day50\text{ mg/kg/day} intramuscularly, divided into two equal doses.

Pharmacy Dispenses:
Ceftriaxone 1 g1\text{ g} vial of sterile powder.
Reconstitution instructions: Add 2.1 mL2.1\text{ mL} of sterile water for injection to yield a final concentration of 350 mg/mL350\text{ mg/mL}.

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

Cevabı ve açıklamayı göster

Cevap: 1.1

Cevap

1.1
To administer the correct dose, the nurse must first convert the weight to kilograms, find the individual dose by dividing the daily total in half, and then use the final yield concentration (350 mg/mL350\text{ mg/mL}) to determine the volume to administer. The volume of diluent added (2.1 mL2.1\text{ mL}) is a distractor and is not used in the formula.

Adım Adım Çözüm

1
Convert pounds to kilograms.
16 kg16\text{ kg}
The medication is prescribed based on kilograms of body weight.
2
Calculate the total daily dose.
800 mg/day800\text{ mg/day}
Multiply the weight (16 kg16\text{ kg}) by the prescribed daily amount (50 mg/kg50\text{ mg/kg}).
3
Determine the single dose amount.
400 mg/dose400\text{ mg/dose}
The daily dose is divided into two equal doses (800 mg÷2=400 mg800\text{ mg} \div 2 = 400\text{ mg}).
4
Calculate the volume to administer.
1.1428... mL1.1428...\text{ mL}
Divide the desired single dose (400 mg400\text{ mg}) by the concentration (350 mg/mL350\text{ mg/mL}). The 2.1 mL2.1\text{ mL} of diluent is required for reconstitution but is irrelevant to the final volume calculation.
5
Round to the nearest tenth.
1.11.1
Follow the explicit rounding instructions provided in the question stem.

Anahtar Kavram

Weight-based pediatric dosage calculation and medication reconstitution
Soru 6Soru →

An older adult client is admitted to the medical-surgical unit with dehydration and orthostatic hypotension. The client's blood pressure is 98/60 mm Hg98/60\text{ mm Hg} and heart rate is 112 beats/minute112\text{ beats/minute}. The healthcare provider prescribes a continuous intravenous (IV) infusion of 0.9%0.9\% sodium chloride 1,000 mL1,000\text{ mL} to infuse over 8 hours8\text{ hours}. The available IV administration set has a drop factor of 15 drops/mL15\text{ drops/mL}.

How many drops per minute (gtt/min) will the practical nurse regulate the IV flow rate to deliver? Record your answer to the nearest whole number. Do not include units in answer.

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Cevap: 31

Cevap

31
To safely regulate the IV gravity infusion, the practical nurse must determine the drops per minute. This is achieved by multiplying the total fluid volume (1,000 mL1,000\text{ mL}) by the tubing drop factor (15 gtt/mL15\text{ gtt/mL}) to find the total number of drops. That sum (15,000 drops15,000\text{ drops}) is then divided by the total infusion time in minutes (480 minutes480\text{ minutes}). The resulting mathematical value is 31.2531.25, which must be rounded to the nearest whole number, giving a final rate of 31 gtt/min31\text{ gtt/min}.

Adım Adım Çözüm

1
Convert the prescribed infusion time from hours to minutes.
8 hours×60 minutes/hour=480 minutes8\text{ hours} \times 60\text{ minutes/hour} = 480\text{ minutes}
The gravity IV drip rate formula requires the total time to be expressed in minutes.
2
Set up the IV drip rate formula.
Drip Rate=Total Volume (mL)×Drop Factor (gtt/mL)Total Time (minutes)\text{Drip Rate} = \frac{\text{Total Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Total Time (minutes)}}
This is the mathematical standard for determining gravity infusion flow rates.
3
Substitute the given values into the formula and calculate the unrounded rate.
1,000×15480=15,000480=31.25 gtt/min\frac{1,000 \times 15}{480} = \frac{15,000}{480} = 31.25\text{ gtt/min}
Performing the multiplication and division operations yields the exact mathematical delivery rate.
4
Round the result to the nearest whole number.
31.2531.25 rounds down to 3131.
Because standard IV tubing cannot deliver a fraction of a drop, the calculated rate must be rounded to the nearest whole drop.

Anahtar Kavram

Calculating IV flow rates for gravity infusions requires converting the total prescribed time into minutes and applying the administration set's drop factor to determine the required drops per minute.
Soru 7Soru →

A pediatric client weighing 33 lb33 \text{ lb} is diagnosed with acute otitis media. The primary healthcare provider prescribes amoxicillin 80 mg/kg/day80 \text{ mg/kg/day} by mouth, to be administered in two equally divided doses. The pharmacy dispenses a powder for oral suspension with the manufacturer instructions: 'Reconstitute with 68 mL68 \text{ mL} of purified water to yield a final volume of 100 mL100 \text{ mL} and a concentration of 400 mg/5 mL400 \text{ mg}/5 \text{ mL}.' Based on this prescription, how many milliliters should the nurse administer for a single dose? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 7.5

Cevap

7.5
The correct dose is calculated by first converting the child's weight to kilograms (33 lb/2.2=15 kg33 \text{ lb} / 2.2 = 15 \text{ kg}). Next, the total daily dose is found by multiplying the weight by the prescribed rate (15 kg×80 mg/kg/day=1200 mg/day15 \text{ kg} \times 80 \text{ mg/kg/day} = 1200 \text{ mg/day}). Since the medication is divided into two doses, the single dose requirement is 600 mg600 \text{ mg}. Finally, using the supplied concentration of 400 mg400 \text{ mg} per 5 mL5 \text{ mL}, the required liquid volume is calculated as 600 mg×(5 mL/400 mg)=7.5 mL600 \text{ mg} \times (5 \text{ mL} / 400 \text{ mg}) = 7.5 \text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
15 kg15 \text{ kg}
The prescribed dosage is weight-based in mg/kg, so the weight must first be converted by dividing pounds by 2.2 (33÷2.2=1533 \div 2.2 = 15).
2
Calculate the total daily medication dose.
1200 mg/day1200 \text{ mg/day}
Multiply the client's weight in kilograms by the prescribed daily amount (15 kg×80 mg/kg/day=1200 mg/day15 \text{ kg} \times 80 \text{ mg/kg/day} = 1200 \text{ mg/day}).
3
Determine the required milligrams for a single dose.
600 mg/dose600 \text{ mg/dose}
The total daily dose is prescribed to be given in two equally divided doses, so it must be divided by 2 (1200 mg÷2=600 mg/dose1200 \text{ mg} \div 2 = 600 \text{ mg/dose}).
4
Calculate the liquid volume to administer per dose.
7.5 mL7.5 \text{ mL}
Use the final concentration ratio (400 mg/5 mL400 \text{ mg}/5 \text{ mL}) to find the volume: 600 mg×(5 mL/400 mg)=7.5 mL600 \text{ mg} \times (5 \text{ mL} / 400 \text{ mg}) = 7.5 \text{ mL}. The diluent volume (68 mL68 \text{ mL}) and total bottle volume (100 mL100 \text{ mL}) are distractor data points not used in calculating the individual dose.

Anahtar Kavram

Weight-based pediatric dosage calculation and filtering of extraneous reconstitution data.
Soru 8Soru →

A school-aged child who weighs 33 lbs33\text{ lbs} requires antipyretic therapy. The healthcare provider prescribes oral ibuprofen at 10 mg/kg/dose10\text{ mg/kg/dose} every 6 hours6\text{ hours}. The pharmacy dispenses an ibuprofen oral suspension with a concentration of 100 mg100\text{ mg} per 5 mL5\text{ mL}. Calculate the volume, in milliliters (mL\text{mL}), the practical nurse should administer for a single dose. Record the answer to the nearest tenth. Do not include units in your answer.

Cevabı ve açıklamayı göster

Cevap: 7.5

Cevap

7.5
To determine the correct volume, the nurse must first convert the child's weight to kilograms (33 lbs÷2.2=15 kg33\text{ lbs} \div 2.2 = 15\text{ kg}). Next, the weight is multiplied by the prescribed dosage parameter (15 kg×10 mg/kg=150 mg15\text{ kg} \times 10\text{ mg/kg} = 150\text{ mg}). Finally, using the desired-over-have method, the liquid volume is calculated: (150 mg÷100 mg)×5 mL=7.5 mL(150\text{ mg} \div 100\text{ mg}) \times 5\text{ mL} = 7.5\text{ mL}. The value is exactly 7.57.5, so it meets the requirement of being recorded to the nearest tenth.

Adım Adım Çözüm

1
Convert the patient's weight from pounds to kilograms.
33 lbs÷2.2 lbs/kg=15 kg33\text{ lbs} \div 2.2\text{ lbs/kg} = 15\text{ kg}
Standard pediatric medication dosages are calculated based on weight in kilograms.
2
Calculate the total required dose in milligrams.
15 kg×10 mg/kg=150 mg15\text{ kg} \times 10\text{ mg/kg} = 150\text{ mg}
The prescribed dose must be multiplied by the patient's body weight to find the individualized dose.
3
Calculate the final liquid volume to administer based on the pharmacy's concentration.
150 mg100 mg×5 mL=7.5 mL\frac{150\text{ mg}}{100\text{ mg}} \times 5\text{ mL} = 7.5\text{ mL}
The ordered milligram dose must be converted into the administrable liquid volume.

Anahtar Kavram

Weight-based pediatric dosage calculation and liquid medication administration
Soru 9Soru →

A healthcare provider prescribes ceftriaxone 50 mg/kg/day50\text{ mg/kg/day} intramuscularly (IM) to be given in two divided doses for a toddler who weighs 26.4 lbs26.4\text{ lbs}. The pharmacy supplies ceftriaxone as a powder in a vial labeled 1 g1\text{ g}. The reconstitution instructions on the vial state: "Add 2.1 mL2.1\text{ mL} of sterile water for injection to yield a final concentration of 350 mg/mL350\text{ mg/mL}."

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

Cevabı ve açıklamayı göster

Cevap: 0.9

Cevap

0.9
To determine the correct volume to administer, first convert the weight to kilograms (26.4 lbs÷2.2=12 kg26.4\text{ lbs} \div 2.2 = 12\text{ kg}). Next, calculate the total daily dose by multiplying the weight by the prescribed rate (12 kg×50 mg/kg=600 mg12\text{ kg} \times 50\text{ mg/kg} = 600\text{ mg}). Because the medication is given in two divided doses, divide the total daily dose by 2 (600 mg÷2=300 mg600\text{ mg} \div 2 = 300\text{ mg}). Finally, use the reconstituted concentration of 350 mg/mL350\text{ mg/mL} to find the volume: (300 mg÷350 mg/mL=0.857... mL300\text{ mg} \div 350\text{ mg/mL} = 0.857...\text{ mL}). Rounding to the nearest tenth yields 0.9 mL0.9\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
26.4 lbs÷2.2 lbs/kg=12 kg26.4\text{ lbs} \div 2.2\text{ lbs/kg} = 12\text{ kg}
The medication dosage is prescribed based on the client's weight in kilograms.
2
Calculate the total daily dosage in milligrams.
12 kg×50 mg/kg/day=600 mg/day12\text{ kg} \times 50\text{ mg/kg/day} = 600\text{ mg/day}
This establishes the total amount of medication the toddler needs over a 24-hour period.
3
Determine the required milligrams for a single dose.
600 mg/day÷2 doses=300 mg/dose600\text{ mg/day} \div 2\text{ doses} = 300\text{ mg/dose}
The prescription states the medication is to be given in two divided doses per day, and the question asks for the volume of one dose.
4
Calculate the volume of the medication to administer based on the reconstituted concentration.
300 mg÷350 mg/mL=0.85714... mL300\text{ mg} \div 350\text{ mg/mL} = 0.85714...\text{ mL}
The final concentration yield (350 mg/mL350\text{ mg/mL}), not the diluent volume, must be used to calculate the physical volume to draw up into the syringe.
5
Round the final answer to the nearest tenth.
0.9 mL0.9\text{ mL}
The question explicitly asks to record the answer to the nearest tenth.

Anahtar Kavram

Weight-based pediatric dosage calculation and medication reconstitution
Soru 10Soru →

A client residing in a long-term care facility requires scheduled medications via a percutaneous endoscopic gastrostomy (PEG) tube. The primary health care provider prescribes liquid levetiracetam 750 mg750 \text{ mg} every 12 hours12 \text{ hours} for seizure management. The supplied medication concentration is 100 mg/mL100 \text{ mg/mL}. According to the facility's enteral medication protocol, the practical nurse must flush the tube with 30 mL30 \text{ mL} of purified water immediately before and 30 mL30 \text{ mL} immediately after administering the medication. Calculate the total fluid volume in milliliters the nurse will administer for a single medication sequence, including the flushes. Record answer to the nearest tenth. Do not include units in answer.

Cevabı ve açıklamayı göster

Cevap: 67.5

Cevap

67.5
To determine the total volume administered, the nurse must first calculate the medication volume using the standard formula: Dose desired / Dose on hand = Volume to administer. Therefore, 750 mg÷100 mg/mL=7.5 mL750 \text{ mg} \div 100 \text{ mg/mL} = 7.5 \text{ mL}. Next, the nurse must add the flush volumes required before and after the medication to find the total fluid amount for this procedure: 7.5 mL+30 mL+30 mL=67.5 mL7.5 \text{ mL} + 30 \text{ mL} + 30 \text{ mL} = 67.5 \text{ mL}.

Adım Adım Çözüm

1
Calculate the volume of the prescribed medication dose.
7.5 mL7.5 \text{ mL}
The required dose (750 mg750 \text{ mg}) must be divided by the concentration available (100 mg/mL100 \text{ mg/mL}) to determine how many milliliters of the liquid medication to draw up.
2
Calculate the total volume of fluid to be administered by adding the medication volume and both flush volumes.
67.5 mL67.5 \text{ mL}
To accurately document the client's fluid intake and ensure proper administration, the nurse must combine the medication volume (7.5 mL7.5 \text{ mL}), the pre-administration flush (30 mL30 \text{ mL}), and the post-administration flush (30 mL30 \text{ mL}).

Anahtar Kavram

Enteral Medication Administration and Dosage Calculation
Soru 11Soru →

A healthcare provider prescribes cefazolin 350350 mg intramuscularly (IM) every 88 hours for a client with a respiratory infection. The medication is supplied in a vial containing 500500 mg of cefazolin powder. The reconstitution instructions on the label state: 'Add 2.02.0 mL of sterile water for injection to provide a total reconstituted volume of 2.22.2 mL.' How many milliliters (mL) should the practical nurse (PN) withdraw to administer one dose? Record your answer to the nearest tenth. Do not include units in your answer.

Cevabı ve açıklamayı göster

Cevap: 1.5

Cevap

1.5
To calculate the correct volume for a reconstituted medication, the nurse must use the total volume yielded after the powder is dissolved, not just the volume of the diluent added. The formula is DesiredHave×Volume=350500×2.2=1.54\frac{\text{Desired}}{\text{Have}} \times \text{Volume} = \frac{350}{500} \times 2.2 = 1.54 mL. Rounded to the nearest tenth, the correct amount to administer is 1.51.5 mL.

Adım Adım Çözüm

1
Identify the prescribed desired dose.
350350 mg
This is the target amount of medication required for a single administration.
2
Determine the final concentration of the medication on hand.
500500 mg in 2.22.2 mL
When reconstituting a powder, the total resulting volume (2.22.2 mL), not the diluent volume (2.02.0 mL), must be used to calculate concentration because the powder adds displacement volume.
3
Apply the dosage calculation formula: DesiredHave×Volume\frac{\text{Desired}}{\text{Have}} \times \text{Volume}.
350500×2.2\frac{350}{500} \times 2.2
This mathematical relationship ensures the correct proportion of liquid is drawn to deliver the exact milligram amount requested.
4
Calculate the exact volume and round to the nearest tenth.
1.541.54 mL rounds to 1.51.5 mL
Rounding instructions require one decimal place for standard clinical precision.

Anahtar Kavram

Reconstituted Medication Dosage Calculation
Soru 12Soru →

A 4-year-old pediatric client is admitted to the pediatric unit with a high fever. The healthcare provider prescribes ibuprofen 8 mg/kg8\text{ mg/kg} orally every 6 hours as needed for temperature greater than 101.5∘F101.5^\circ\text{F} (38.6∘C38.6^\circ\text{C}). The client's current weight is documented as 41.8 lbs41.8\text{ lbs}. The unit stocks ibuprofen oral suspension at a concentration of 100 mg/5 mL100\text{ mg}/5\text{ mL}. How many mL should be administered for one dose? Record the answer to the nearest tenth. Do not include units in the answer.

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Cevap: 7.6

Cevap

7.6
The correct dose is calculated by first converting the child's weight to kilograms (41.8 lbs÷2.2=19 kg41.8\text{ lbs} \div 2.2 = 19\text{ kg}). Next, the weight in kg is multiplied by the prescribed dose to find the desired amount (19 kg×8 mg/kg=152 mg19\text{ kg} \times 8\text{ mg/kg} = 152\text{ mg}). Finally, using the available medication concentration of 100 mg100\text{ mg} in 5 mL5\text{ mL}, the required volume is determined by dividing the desired dose by the available dose, then multiplying by the quantity (152 mg100 mg×5 mL=7.6 mL\frac{152\text{ mg}}{100\text{ mg}} \times 5\text{ mL} = 7.6\text{ mL}). The final answer is already at the tenths place, requiring no further rounding.

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}
Weight-based medication dosages require the client's weight to be in kilograms for accurate calculation.
2
Calculate the total prescribed dose in milligrams (mg) using the client's weight in kilograms.
19 kg×8 mg/kg=152 mg19 \text{ kg} \times 8 \text{ mg/kg} = 152 \text{ mg}
The healthcare provider prescribed 8 mg per every 1 kg of body weight per dose.
3
Determine the volume of liquid medication to administer in milliliters (mL).
152 mg100 mg×5 mL=1.52×5 mL=7.6 mL\frac{152 \text{ mg}}{100 \text{ mg}} \times 5 \text{ mL} = 1.52 \times 5 \text{ mL} = 7.6 \text{ mL}
Using the dimensional analysis or the formula (Desired Dose / Available Dose) x Quantity calculates the exact volume of suspension needed to deliver the required milligrams.

Anahtar Kavram

Weight-based dosage calculation for pediatric pharmacology
Soru 13Soru →

A practical nurse (PN) in a pediatric clinic is preparing to administer the first dose of oral amoxicillin to a toddler diagnosed with acute otitis media. The toddler weighs 33 lbs33\text{ lbs}. The primary healthcare provider has prescribed 45 mg/kg/day45\text{ mg/kg/day} of amoxicillin, to be administered in two equally divided doses every 12 hours12\text{ hours}. The clinic pharmacy dispenses amoxicillin oral suspension at a concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL}. How many milliliters (mL\text{mL}) should the PN administer for this single dose? Record your answer to the nearest tenth. Do not include units in your answer.

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Cevap: 6.8

Cevap

6.8
To determine the correct dose, first convert the weight to kilograms (33 lbs÷2.2=15 kg33\text{ lbs} \div 2.2 = 15\text{ kg}). Next, calculate the daily dose (15 kg×45 mg/kg=675 mg/day15\text{ kg} \times 45\text{ mg/kg} = 675\text{ mg/day}). Divide by 2 for the single dose every 12 hours (337.5 mg/dose337.5\text{ mg/dose}). Finally, use the desired-over-have formula: (337.5 mg÷250 mg)×5 mL=6.75 mL(337.5\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 6.75\text{ mL}, which rounds up to 6.8 mL6.8\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
15 kg15\text{ kg}
Weight-based dosing requires the body weight to be calculated in kilograms.
2
Calculate the total daily dose prescribed.
675 mg/day675\text{ mg/day}
The prescription is written as a total daily amount based on the child's weight.
3
Determine the amount for a single dose.
337.5 mg/dose337.5\text{ mg/dose}
The medication is to be administered in two equally divided doses every 12 hours.
4
Calculate the liquid volume to administer for one dose.
6.75 mL6.75\text{ mL}
This calculation uses the available pharmacy concentration of 250 mg/5 mL250\text{ mg}/5\text{ mL} to find the required volume.
5
Round the final answer to the nearest tenth.
6.8 mL6.8\text{ mL}
Clinical calculations are typically rounded to the nearest tenth for volumes greater than 1 mL1\text{ mL} to ensure safe and accurate measurement.

Anahtar Kavram

Pediatric Weight-Based Dosage Calculation
Soru 14Soru →

An 8-year-old child weighing 5555 lb is prescribed oral cefdinir. The prescribed dose is 1414 mg/kg/day, to be administered in two divided doses every 1212 hours. The pharmacy dispenses cefdinir oral suspension at a concentration of 250250 mg/55 mL. How many milliliters (mL) will the practical nurse administer for a single dose? Record your answer using one decimal place. Do not include units in your answer.

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Cevap: 3.5

Cevap

3.5
To find the correct single dose volume, the nurse first converts the child's weight to kilograms (55÷2.2=2555 \div 2.2 = 25 kg). Next, the total daily dose is calculated (14×25=35014 \times 25 = 350 mg). Since this daily dose is divided every 12 hours, the single dose is half of the total (350÷2=175350 \div 2 = 175 mg). Finally, using the available concentration of 250250 mg in 55 mL, the nurse determines the volume: 175250×5=3.5\frac{175}{250} \times 5 = 3.5 mL.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms (55÷2.2=2555 \div 2.2 = 25).
25 kg
The prescribed medication dosage is based on kilograms (mg/kg/day).
2
Calculate the total daily dose in milligrams (14×25=35014 \times 25 = 350).
350 mg/day
Multiply the client's weight in kg by the prescribed daily dosage of 14 mg/kg/day.
3
Calculate the amount needed for a single dose (350÷2=175350 \div 2 = 175).
175 mg/dose
The prescription states the daily dose must be divided into two equal doses to be given every 12 hours.
4
Calculate the volume of liquid to administer per dose (175250×5=3.5\frac{175}{250} \times 5 = 3.5).
3.5 mL
Use dimensional analysis or the formula DesiredHave×Volume\frac{\text{Desired}}{\text{Have}} \times \text{Volume}.

Anahtar Kavram

Weight-based dosage calculation for divided pediatric doses
Soru 15Soru →

A practical nurse (PN) is caring for a client who is receiving a continuous intravenous (IV) infusion of Lactated Ringer's for fluid replacement. The healthcare provider's prescription is for 1,000 mL1,000 \text{ mL} to infuse over 12 hours. The primary IV tubing has a drop factor of 15 gtt/mL15 \text{ gtt/mL}. The registered nurse (RN) has initiated the infusion. At what rate, in drops per minute (gtt/min), should the PN verify the IV is infusing?

*Record your answer to the nearest whole number. Do not include units in your answer.*

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Cevap: 21

Cevap

21
To calculate the gravity flow rate in drops per minute, the nurse must first convert the total infusion time into minutes (12 hours * 60 = 720 minutes). Then, use the standard formula: (Total Volume / Total Time in minutes) * Drop Factor. Plugging in the values gives: (1,000 mL / 720 minutes) * 15 gtt/mL = 20.833 gtt/min. Because the nurse cannot administer a fraction of a drop, the final step is to round to the nearest whole number, which is 21.

Adım Adım Çözüm

1
Convert the prescribed time to minutes
720 minutes
The gravity flow rate formula requires total time to be in minutes, but the prescription is given in hours.
2
Apply the IV flow rate formula
20.833 gtt/min
Multiply the volume over time by the drop factor to find the drops per minute.
3
Round to the nearest whole number
21
IV drip rates must be counted in whole drops.

Anahtar Kavram

Intravenous flow rate calculation (drops per minute) for a continuous fluid infusion.
Soru 16Soru →

The healthcare provider prescribes oral ibuprofen for a toddler who weighs 3333 pounds and has a temperature of 101.2∘F101.2^\circ\text{F} (38.4∘C38.4^\circ\text{C}). The prescribed dosage is 10 mg/kg10\text{ mg/kg} per dose. The available medication is an oral suspension labeled 100 mg/5 mL100\text{ mg}/5\text{ mL}. How many milliliters should the nurse administer for a single dose?

Record your answer to the nearest tenth. Do not include units in the answer.

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Cevap: 7.5

Cevap

7.5
To find the correct administration volume, the practical nurse must systematically process the data. First, the toddler's weight is converted to standard metric units by dividing by 2.22.2 (33 lbs÷2.2=15 kg33 \text{ lbs} \div 2.2 = 15\text{ kg}). Next, the weight is multiplied by the ordered weight-based dose to find the target milligrams (15 kg×10 mg/kg=150 mg15\text{ kg} \times 10\text{ mg/kg} = 150\text{ mg}). Finally, the nurse calculates the required volume using the supplied concentration: (150 mg÷100 mg)×5 mL=7.5 mL(150\text{ mg} \div 100\text{ mg}) \times 5\text{ mL} = 7.5\text{ mL}.

Adım Adım Çözüm

1
Convert the toddler's weight from pounds to kilograms.
33 lbs÷2.2 lbs/kg=15 kg33 \text{ lbs} \div 2.2 \text{ lbs/kg} = 15 \text{ kg}
Weight-based medication dosages must be calculated using kilograms to ensure safe administration limits.
2
Calculate the total required dose in milligrams.
15 kg×10 mg/kg=150 mg15 \text{ kg} \times 10 \text{ mg/kg} = 150 \text{ mg}
The prescription specifies a weight-based dose of 10 mg for every kilogram of body weight.
3
Calculate the administration volume using the available suspension concentration.
(150 mg÷100 mg)×5 mL=7.5 mL(150 \text{ mg} \div 100 \text{ mg}) \times 5 \text{ mL} = 7.5 \text{ mL}
Applying the desired over have formula determines the exact liquid volume needed to deliver the prescribed milligram dose.

Anahtar Kavram

Weight-based dosage calculation and liquid medication volume conversion
Soru 17Soru →

During a shift, a practical nurse reviews the medication administration record for a client being treated for a pulmonary embolism. The client weighs 165 lb165\text{ lb}. The provider has prescribed a subcutaneous injection of enoxaparin sodium at 1 mg/kg1\text{ mg/kg} every 12 hours12\text{ hours}. The medication is supplied in a prefilled syringe containing 100 mg/1 mL100\text{ mg}/1\text{ mL}. How many mL\text{mL} should the nurse administer? Record your answer to the nearest hundredth. Do not include units in your answer.

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Cevap: 0.75

Cevap

0.75
To determine the correct volume to administer, first convert the client's weight to kilograms (165÷2.2=75 kg165 \div 2.2 = 75\text{ kg}). Next, determine the total dose required by multiplying the weight by the prescribed rate (75×1=75 mg75 \times 1 = 75\text{ mg}). Finally, divide the required dose by the available concentration to find the volume in milliliters (75÷100=0.75 mL75 \div 100 = 0.75\text{ mL}).

Adım Adım Çözüm

1
Convert the client's weight to kilograms
75 kg75\text{ kg}
The prescription is weight-based in kilograms, so the pounds must be converted (165÷2.2=75165 \div 2.2 = 75).
2
Calculate the required medication dose
75 mg75\text{ mg}
Multiply the client's weight in kilograms by the prescribed dosage rate (75×1=7575 \times 1 = 75).
3
Calculate the volume to administer
0.75 mL0.75\text{ mL}
Divide the desired dose by the available concentration to find the required liquid volume (75÷100×1=0.7575 \div 100 \times 1 = 0.75).

Anahtar Kavram

Weight-based medication dosage and volume calculation
Soru 18Soru →

An older adult client admitted with community-acquired pneumonia has a scheduled dose of intravenous levofloxacin. The medication arrives from the pharmacy as a 500 mg500 \text{ mg} dose premixed in a 100 mL100 \text{ mL} bag of 5% Dextrose5\% \text{ Dextrose} in Water (D5W\text{D}_5\text{W}). According to the administration instructions, the medication must infuse steadily over 9090 minutes.

At what rate, in mL/hr\text{mL/hr}, should the infusion pump be programmed?

Record answer to the nearest tenth. Do not include units in answer.

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Cevap: 66.7

Cevap

The infusion pump should be programmed to a rate of 66.766.7.
To determine the correct IV pump setting in mL/hr\text{mL/hr}, the total volume of the infusion (100 mL100 \text{ mL}) must be divided by the total time in minutes (9090 minutes) and then multiplied by 6060 (the number of minutes in an hour). This yields 66.666... mL/hr66.666... \text{ mL/hr}. Rounding to the nearest tenth provides the final correct value of 66.766.7.

Adım Adım Çözüm

1
Identify the total volume to be infused.
The total fluid volume is 100 mL100 \text{ mL}.
The rate calculation relies on the total fluid volume of the IV bag, not the mass of the medication.
2
Identify the designated infusion time.
The infusion time is 9090 minutes.
This determines the duration over which the volume must be delivered.
3
Set up the standard formula for an IV pump rate.
100 mL90 minutes×60 minutes/hour\frac{100 \text{ mL}}{90 \text{ minutes}} \times 60 \text{ minutes/hour}
Infusion pumps are programmed in milliliters per hour (mL/hr\text{mL/hr}), so the time in minutes must be converted.
4
Calculate the continuous rate.
1.111...×60=66.666... mL/hr1.111... \times 60 = 66.666... \text{ mL/hr}
This provides the exact hourly rate required to deliver the medication over the specified timeframe.
5
Apply the rounding instructions.
66.766.7
The prompt explicitly requires rounding to the nearest tenth for safe and accurate pump programming.

Anahtar Kavram

Intravenous Infusion Rate Calculation
Soru 19Soru →

A practical nurse in a long-term care facility is reviewing a new medication order for a resident diagnosed with a lower respiratory tract infection. The provider's prescription reads: 'Azithromycin 500 mg500\text{ mg} PO on day 1, followed by 250 mg250\text{ mg} PO daily on days 2 through 5.' The pharmacy dispenses an azithromycin oral suspension with a concentration of 200 mg/5 mL200\text{ mg}/5\text{ mL}. How many total milliliters (mL) of this medication will the nurse administer over the entire 5-day treatment course? (Record answer to the nearest tenth. Do not include units in answer.)

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Cevap: 37.5

Cevap

37.5
The prescription requires a total of 1,500 mg1,500\text{ mg} of azithromycin over 5 days (500 mg500\text{ mg} on day 1, plus 1,000 mg1,000\text{ mg} over days 2 through 5). Using the supplied concentration of 200 mg/5 mL200\text{ mg}/5\text{ mL}, the required volume is calculated by dividing 1,5001,500 by 200200, which equals 7.57.5. Multiplying 7.57.5 by 55 yields exactly 37.5 mL37.5\text{ mL}.

Adım Adım Çözüm

1
Calculate the total milligrams required for the full 5-day prescription.
Day 1 = 500 mg500\text{ mg}. Days 2-5 (4 days) = 1,000 mg1,000\text{ mg}. Total = 1,500 mg1,500\text{ mg}.
To determine the complete volume needed, the total medication dosage over all days must first be established.
2
Set up the dimensional analysis or standard dosage formula to convert total milligrams to milliliters.
(1,500 mg200 mg)×5 mL(\frac{1,500\text{ mg}}{200\text{ mg}}) \times 5\text{ mL}
This aligns the prescribed dose with the available concentration (200 mg200\text{ mg} per 5 mL5\text{ mL}) supplied by the pharmacy.
3
Solve the equation and round to the nearest tenth as instructed.
7.5×5=37.5 mL7.5 \times 5 = 37.5\text{ mL}
Ensures the correct final liquid volume is calculated without rounding errors.

Anahtar Kavram

Multi-step Dosage Calculation and Course Accumulation
Soru 20Soru →

A practical nurse is preparing to administer cephalexin oral suspension to a pediatric client who weighs 39.6 lb. The healthcare provider's prescription is for 15 mg/kg/dose to be administered every 12 hours. The pharmacy dispenses a cephalexin suspension concentration of 125 mg/5 mL. How many mL should the practical nurse administer per dose? (Record your answer to the nearest tenth. Do not include units in your answer.)

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Cevap: 10.8

Cevap

10.8
To determine the correct volume, first convert the weight to kilograms (39.6 ÷ 2.2 = 18 kg). Next, find the required dose in milligrams (18 kg × 15 mg/kg = 270 mg). Finally, use the formula (Desired / Have) × Volume to find the correct volume to administer ((270 mg / 125 mg) × 5 mL = 10.8 mL).

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
39.6 lb ÷ 2.2 lb/kg = 18 kg
The medication dosage is prescribed based on the client's weight in kilograms.
2
Calculate the desired dose in milligrams.
18 kg × 15 mg/kg = 270 mg/dose
This determines the exact amount of medication the client needs for one single administration.
3
Calculate the volume of medication to administer.
(270 mg / 125 mg) × 5 mL = 2.16 × 5 mL = 10.8 mL
Using the dose calculation formula determines the correct liquid amount to draw up.

Anahtar Kavram

Weight-based medication dosage calculation and liquid volume conversion
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