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Hesi rn dosage calculations
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Showing 10 questions, Sign in for moreA client on the palliative care unit is receiving midazolam 3 mg SUBQ every 2 hours PRN for terminal agitation and intractable hiccups. The medication iS available in a 5 mL ampoule labeled. "2 mg/mL." How many mL should the nurse administer for each dose? (Enter the numerical value only.)
Explanation
Given:
Ordered dose of Midazolam: 3 mg SUBQ every 2 hours PRN
Concentration of Midazolam: 2 mg/mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
3 mg / Volume = 2 mg/mL
Step 3: Solve for the unknown volume:
Volume = 3 mg / (2 mg/mL)
Volume = 3 mg x (1 mL / 2 mg)
Volume = 1.5 mL
A client who weighs 176 pounds receives a prescription for filgrastim 5 mcg/kg/daily subcutaneously for 14 days. The medication is available in 300 mcg/mL vial. How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
Explanation
Given:
Ordered dose of Filgrastim: 5 mcg/kg/daily
Patient weight: 176 pounds
Concentration of Filgrastim: 300 mcg/mL
Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 176 lbs x 0.453592 kg/lb = 79.832 kg
Step 2: Calculate the total daily dose of Filgrastim:
Total daily dose (mcg) = Ordered dose (mcg/kg/daily) x Patient weight (kg)
Total daily dose (mcg) = 5 mcg/kg/daily x 79.832 kg
Total daily dose (mcg) = 399.16 mcg
Step 3: Calculate the volume to be administered:
Volume (mL) = Total daily dose (mcg) / Concentration (mcg/mL)
Volume (mL) = 399.16 mcg / 300 mcg/mL
Volume (mL) = 1.3305 mL
Step 4: Round to the nearest tenth:
Volume (mL) ≈ 1.3 mL
A client receives a prescription for tetracycline 500 mg by mouth every 12 h. The medication is available in 250 mg capsules. How many capsule(s) should the nurse administer each day? (Enter numerical value only.)
Explanation
Ordered dose of tetracycline: 500 mg every 12 hours
Available tetracycline capsules: 250 mg/capsule
Step 1: Determine the total daily dose of tetracycline:
Since the medication is given every 12 hours, there are 2 administrations per day.
Total daily dose (mg) = Dose per administration (mg) x Number of administrations per day
Total daily dose (mg) = 500 mg/dose x 2 doses/day
Total daily dose (mg) = 1000 mg/day
Step 2: Calculate the number of capsules required per day:
Number of capsules/day = Total daily dose (mg) / Strength of each capsule (mg/capsule)
Number of capsules/day = 1000 mg/day / 250 mg/capsule
Number of capsules/day = 4 capsules/day
The healthcare provider prescribes an IV solution of clindamycin 850 mg in 75 mL of D5W to infuse over 30 minutes. The drop factor is 15 gtt/mL. The nurse should regulate the IV to deliver how many gtt/minute? (Enter numeric value only. If rounding is required, round to the nearest whole number)
Explanation
Given:
Volume of fluid: 75 mL
Infusion time: 30 minutes
Drop factor: 15 gtt/mL
Formula:
Flow rate (gtt/min) = (Volume (mL) / Time (min)) x Drop factor (gtt/mL)
Step 1: Calculate the infusion rate in mL/min:
Infusion rate (mL/min) = Volume (mL) / Time (min)
Infusion rate (mL/min) = 75 mL / 30 min
Infusion rate (mL/min) = 2.5 mL/min
Step 2: Calculate the flow rate in gtt/min:
Flow rate (gtt/min) = Infusion rate (mL/min) x Drop factor (gtt/mL)
Flow rate (gtt/min) = 2.5 mL/min x 15 gtt/mL
Flow rate (gtt/min) = 37.5 gtt/min
Step 3: Round to the nearest whole number:
Flow rate (gtt/min) ≈ 38 gtt/min
The healthcare provider prescribes an IV solution of regular insulin 100 units in 250 mL of 0.45% saline to infuse at 12 units/hour. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)
Explanation
Given:
Total insulin in solution: 100 units
Volume of solution: 250 mL
Infusion rate: 12 units/hour
Step 1: Determine the concentration of insulin in the solution:
Concentration (units/mL) = Total insulin (units) / Volume of solution (mL)
Concentration (units/mL) = 100 units / 250 mL
Concentration (units/mL) = 0.4 units/mL
Step 2: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Infusion rate (units/hr) / Concentration (units/mL)
Infusion rate (mL/hr) = 12 units/hr / 0.4 units/mL
Infusion rate (mL/hr) = 30 mL/hr
The healthcare provider prescribes lamivudine oral solution 150 mg twice daily for a client who is HIV positive. The available bottle contains 240 mL of lamivudine labeled, 10 mg/mL. How many mL should the nurse administer in a 24 hour period? (Enter numeric value only.)
Explanation
Given:
Ordered dose of lamivudine: 150 mg twice daily
Concentration of lamivudine solution: 10 mg/mL
Step 1: Calculate the total daily dose of lamivudine:
Total daily dose (mg) = Dose per administration (mg) x Number of administrations per day
Total daily dose (mg) = 150 mg/dose x 2 doses/day
Total daily dose (mg) = 300 mg/day
Step 2: Calculate the volume to be administered per dose:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 150 mg / 10 mg/mL
Volume (mL) = 15 mL/dose
Step 3: Calculate the total volume to be administered in 24 hours:
Total volume (mL) = Volume per dose (mL) x Number of doses per day
Total volume (mL) = 15 mL/dose x 2 doses/day
Total volume (mL) = 30 mL/day
A client receives a prescription for amoxicillin 2 g/clavulanate 125 mg by mouth every 12 hours for 10 days. The medication is available in 1000 mg/62.5 mg extended release tablets. How many tablets should the nurse administer? (Enter numerical value only.)
Explanation
Given:
Ordered dose of amoxicillin/clavulanate: 2 g amoxicillin + 125 mg clavulanate every 12 hours
Available tablets: 1000 mg amoxicillin + 62.5 mg clavulanate extended-release tablets
Step 1: Determine the total daily dose of amoxicillin/clavulanate:
Since the medication is given every 12 hours, there are 2 administrations per day.
Total daily dose (amoxicillin) = Dose per administration (amoxicillin) x Number of administrations per day
Total daily dose (amoxicillin) = 2 g/dose x 2 doses/day
Total daily dose (amoxicillin) = 4 g/day = 4000 mg/day
Total daily dose (clavulanate) = Dose per administration (clavulanate) x Number of administrations per day
Total daily dose (clavulanate) = 125 mg/dose x 2 doses/day
Total daily dose (clavulanate) = 250 mg/day
Step 2: Calculate the number of tablets required per day:
Number of tablets/day = Total daily dose (amoxicillin) / Strength of amoxicillin per tablet
Number of tablets/day = 4000 mg/day / 1000 mg/tablet
Number of tablets/day = 4 tablets/day
The healthcare provider prescribes filgrastim 410 mcg SUBQ every day for : client post bone marrow transplant. The medication is "Available in filgrastim 600 mcg/mL." How many mL should the nurse administer? (Enter numerical value only. If rounding is required round to the nearest tenth)
Explanation
Given:
Ordered dose of Filgrastim: 410 mcg SUBQ every day
Concentration of Filgrastim: 600 mcg/mL
Step 1: Set up the proportion:
Desired dose (mcg) / Volume to administer (mL) = Concentration (mcg/mL)
Step 2: Substitute the values:
410 mcg / Volume = 600 mcg/mL
Step 3: Solve for the unknown volume:
Volume = 410 mcg / (600 mcg/mL)
Volume = 410 mcg x (1 mL / 600 mcg)
Volume = 0.6833 mL
Step 4: Round to the nearest tenth:
Volume ≈ 0.7 mL
The healthcare provider prescribes trimethobenzamide 100 mg IM every 6 hours for a client with postoperative vomiting. "Each 2 mL single-dose vial contains 200 mg of trimethobenzamide. How many mL should the nurse administer to the client for each dose? (Enter numeric value only.)
Explanation
Given:
Ordered dose of trimethobenzamide: 100 mg IM every 6 hours
Concentration of trimethobenzamide: 200 mg/2 mL vial
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
100 mg / Volume = 200 mg/2 mL
Step 3: Solve for the unknown volume:
Volume = 100 mg / (200 mg/2 mL)
Volume = 100 mg x (2 mL / 200 mg)
Volume = 1 mL
A client is receiving a secondary infusion of azithromycin 500 mg in 500 mL of normal saline (NS) to be infused over 2 hours. How many mL/hour should the nurse program the infusion pump? (Enter numerical value only.)
Explanation
Given:
Volume of fluid: 500 mL
Infusion time: 2 hours
Formula:
Flow rate (mL/hr) = Volume (mL) / Time (hr)
Step 1: Calculate the infusion rate in mL/hr:
Flow rate (mL/hr) = 500 mL / 2 hr
Flow rate (mL/hr) = 250 mL/hr
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