Dosage calculations Questions and Answers well Explained Latest 2024/2025 Update 100% Correct.

A client with acute decompensated heart failure (HF) is to receive an IV infusion of 0.9% normal saline with inamrinone (Inocor) 0.1 grams/100 ml at a rate of 8 mcg/kg/minute. The client' s current weight is 183 lbs. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - First convert the weight into kilograms: 183 pounds/2.2 kg = 83 kg Next calculate the number of mcg/kg/minute: 8 x 83 = 664 mcg/min Calculate the number of mcg/hour: 664 x 60 minutes = 39,840 mcg/hour Now calculate the number of ml/hour needed to administer 39,840 mcg/hour: 100,000 mcg : 250 ml :: 39,840 mcg : X = 100,000/39,840 :: 250/X and 100,000X = 3,984,000 X = 39.84 (rounded to) 40 ml/hour A client who has heart failure with paroxysmal atrial tachycardia is receiving digoxin (Lanoxin) 0.45 mg IV as the inital digitalizing dose. The pharmacy provides 0.25 mg/ml. How many ml should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.) - Using the formula D/H x Q = 0.45 mg/0.25 mg x 1 mL = 1.8 ml A child weighing 28.4 kg is in hypertensive crisis. The healthcare provider prescibes methyldopa (Aldomet) 40 mg/kg/day IV in 4 divided doses. The pharmacy provides a 50 mg/ml injection vial. How many ml should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.) - First calculate the total mg dose/day: 40 mg x 28.4 kg = 1136 mg/day Next divide the total mg into the 4 dosages for the day: 1136 mg/4 doses = 284 mg/dose Using the Desired/Have formula: 284 mg/50mg x 1 ml = 5.68 ml/ dose, rounded to 5.7 ml. A 9-month-old infant receives a prescription for digoxin 40 mcg PO daily. Digoxin Oral Solution, USP 50 mcg (0.05 mg) per ml is available. How many ml should the nurse administer? (Enter the numerical value only. If rounding is required, round to the nearest tenth.) - Using ratio and proportion, 40 mcg : X ml :: 50 mcg : 1 ml = 0.8 ml A child weighing 28.4 kg is in hypertensive crisis. The healthcare provider prescibes methyldopa (Aldomet) 40 mg/kg/day IV in 4 divided doses. The pharmacy provides a 50 mg/ml injection vial. How many ml should the nurse administer? (Enter numeric value only. If rounding is required, round to thenearest tenth.) - First calculate the total mg dose/day: 40 mg x 28.4 kg = 1136 mg/dayNext divide the total mg into the 4 dosages for the day: 1136 mg/4 doses = 284 mg/doseUsing the Desired/Have formula: 284 mg/50mg x 1 ml = 5.68 ml/ dose, rounded to 5.7 ml. A child who weighs 55 pounds receives a prescription for atovaquone with proguanil (Malarone Pediatric) 125 mg/50mg PO daily. A drug reference states that children 11 - 20 kg should receive 1 pediatric tablet daily, 21 - 30 kg should receive 2 pediatric tablets daily, 31 - 40 kg should receive 3 pediatric tablets daily, and 40 kg should receive 1 adult tablet daily with food. The drug is available as atovaquone 62.5mg/proguanil 25 mg pediatric tablets. How many tablets should the nurse administer? - 2 A client is receiving an IV solution of 2 grams of medication diluted in 100 ml of normal saline over a one hour time period. How many mg of medication is the client receiving per minute? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - 2 grams = 2000 mg 1 hour = 60 minutes 2000 mg/60 minutes = 33.333 mg/minute, rounded to 33 mg/minute A client returns to the nursing unit from surgery with a prescription for Lactated Ringers solution 1000 mL to be infused over 10 hours. The IV administration set delivers 60 gtts/mL. The nurse should regulate the infusion to deliver how many gtts/minute? - 100 gtt/min A client weighing 86 kg is receiving dopamine at 8 mcg/kg/minute. The drug is dispensed as dopamine 800 mg/500 ml. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest tenth.) - First, change the concentration of dispensed dopamine to mcg/ml. 1 mg : 1000 mcg :: 800 mg : X mcg = 800,000 mcg/500 ml = 1600 mcg/ ml. Using the formula, prescribed dose (8 mcg/kg/minute) x 60 minute/hour x weight (86 kg) divided by the concentration of the available drug (1600 mcg/ml) = 8 x 60 x 86 divided by 1600 = 25.8 ml/hour A 110-pound, adult female is admitted to the Emergency Center after receiving burns to 40 percent of her body. Using the Parkland formula, the client's fluid requirements for the first 24 hours after injury is calculated using Lactated Ringer's 4 ml solution x Body weight (in kilograms) x Percent burn. The client should receive one-half of the 24-hour calculated fluid volume in the first 8 hours of treatment. The nurse should set the infusion pump to deliver how many ml/hour during the first 8 hours? (Enter the numerical value only. If rounding is required, round to the nearest whole number.) - Using theParkland formula, the client's fluid requirements for the first 24 hours after injury is calculated using 4 ml lactated Ringer's solution x Body weight (in kilograms) x Percent burn Convert 110 pounds to kg = 110 / 2.2 = 50 kg 4 ml x 50 kg x 40 = 8,000 ml One-half in first 8 hours = 4,000 ml 4,000 ml / 8 hours = 500 = 500 ml/hour A client who had a small bowel resection two weeks ago is receiving 3/4 strength Ensure feedings 275 ml every 4 hours via nasogastric tube. Full strength Ensure is available in a 240 ml can. The nurse should use how many ml of Ensure to prepare the feeding? (Enter numeric value only. Round to nearest whole number if needed.) - Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275 = 0.75 x 275 = 206 Ensure 206 ml Ensure + 69 ml water = 275 ml (75% solution) A client who has AIDS is receiving octreotide (Sandostatin) 1,200 mcg by subcutaneous injection every day for symptoms of diarrhea. Octreotide is available for injection in 1 mg/mL vials. How many mL should the nurse administer? Round to nearest tenth - 1.2 ml A client who weighs 176 pounds is receiving an IV infusion of esmolol hydrochloride (Brevibloc) at 48 ml/hr. The IV solution is labeled with the concentration of Breviblock 10 mg/ml. How many mcg/kg/minute is the client receiving? (Enter numeric value only). - 100 mcg/kg/min A client with a gastrostomy tube (GT) receives a prescription for a 250 ml bolus feeding of Glucerna 60% enteral formula. The nurse should dilute the full strength formula with how many ml of water? - 100 ml of water A client with a gastrostomy tube (GT) receives a prescription for Osmolite 1/2 strength enteral formula at 80 ml/hour. To prepare a 4 hour solution, the nurse should dilute the full-strength formula with how many ml of water? (Enter numeric value only.) - Determine the total volume needed at 80 ml/hour x 4 hours = 320 ml. Use the formula, Desired strength/strength on Hand x Volume = 50/100 x 320 = 160 ml of Osmolite enteral formula, which must be diluted to half strength. Or use ratio and proportion, Desired strength (1/2 = 1 part : 2 parts) :: Volume of full strength : Total Desire volume = 1 : 2 :: X : 320 ml 2X = 320, and X = 160 ml of Osmolite enteral formula, full strength320 ml total volume - 160 ml of full-strength formula = 160 ml of water to create 1/2 strength or 50% concentration A client with a gastrostomy tube (GT) receives a prescription for Osmolite 1/2 strength enteral formula at 80 ml/hour. To prepare a 4 hour solution, the nurse should dilute the full-strength formula with how many ml of water? (Enter numeric value only.) - Determine the total volume needed at 80 ml/hour x 4 hours = 320 ml. Use the formula, Desired strength/strength on Hand x Volume = 50/100 x 320 = 160 ml of Osmolite enteral formula, which must be diluted to half strength.Or use ratio and proportion, Desired strength (1/2 = 1 part : 2 parts) :: Volume of full strength : Total Desire volume = 1 : 2 :: X : 320 ml2X = 320, and X = 160 ml of Osmolite enteral formula, full strength320 ml total volume - 160 ml of full-strength formula = 160 ml of water to create 1/2 strength or 50% concentration A client with dehydration receives a prescription for an IV of Lactated Ringer's 1,000 ml to be administered over 8 hours. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only, using whole number.) - Use the ratio of: 1000 ml : 8 hours :: X : 1 hour 1000/X :: 8/1 X = 125 ml/hour A client with dehydration receives a prescription for an IV of Lactated Ringer's 1,000 ml to be administered over 8 hours. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only, using whole number.) - Use the ratio of: 1000 ml : 8 hours :: X : 1 hour1000/X :: 8/1X = 125 ml/hour A client with impetigo receives a prescription for azithromycin (Zithromax) 500 mg PO on day 1, then 250 mg/day on days 2 through 5 for a total administration of 1.5 gram. The pharmacy has 250 mg tablets available. How many tablets total should the nurse give to the client for the duration of treatment? (Enter numeric value only.) - Using Desired/Have available formula: 500 mg/250 mg x 1 times a day = 2 tablets on Day 1. Days 2 to 5: 1 tablet each day = 4 tablets. 2+4 = 6.