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ATI n300 Dosage calculation
Total Questions : 20
Showing 10 questions, Sign in for moreA client is to receive a continuous infusion of IV Insulin at 6 units per hour. Pharmacy delivers the medication that has a concentration of 200 units of regular insulin in 250 mL of NSS. At what rate should the nurse set the IV pump? (Use a preceding zero If it applies. Do not use trailing zeros. Round to the nearest tenth)
Explanation
Identify the Desired Dose:
The client needs 6 units of insulin per hour.
Identify the Available Concentration:
The solution has 200 units of insulin in 250 mL of NSS.
Set up the Proportion:
(Desired Dose / Available Concentration) = (Rate (mL/hr) / Volume (mL))
(6 units / 200 units) = (X mL / 250 mL)
Solve for X (the Rate):
Cross-multiply: 6 units x 250 mL = 200 units x X mL
1500 = 200X
X = 1500 / 200
X = 7.5 mL/hr
A client is admitted to the unit at 2300 with severe dehydration. The client is to receive IV fluids at 200 mL per hour. The physician prescribes an antibiotic to be administered every 8 hours, in 150 mL of IV fluid, which is started at 0000 (midnight) and run over 1 hour. * At 0100 the IV is infiltrated and not restarted until 0200, and is to run at the previous rate of 200 mL/hr. The client voided a total of 850 mL from 2300 to 0600. Calculate the fluid balance for the 7 shift. it is a positive fluid balance. *Note: For this client the main IV is infusing at the same time as IVPB medications are administered. Hospital policy is that intake/output is calculated at 0600) for the 2300-0700 shift.
Explanation
Calculate the total IV fluid intake:
Main IV Fluid:
From 2300 to 0000: 1 hour x 200 mL/hr = 200 mL
From 0000 to 0100: 1 hour x 200 mL/hr = 200 mL
From 0200 to 0600: 4 hours x 200 mL/hr = 800 mL
Antibiotic IV Fluid:
Administered at 0000: 150 mL
Total IV Intake: 200 mL + 200 mL + 800 mL + 150 mL = 1350 mL
Calculate the total output:
Urine output: 850 mL (given)
Calculate the fluid balance:
Fluid Balance = Total Intake - Total Output
Fluid Balance = 1350 mL - 850 mL = 500 mL
A client is ordered alprazolam 5 mg PO for anxiety. There are 0.5 mg tablets available. How many tablets will the nurse administer? (Use a preceding zero if it applies. Do not use trailing zeros. Round to the nearest whole number)
Explanation
Determine the Desired Dose:
The client needs 1.5 mg of alprazolam.
Determine the Available Dose:
Each tablet contains 0.5 mg of alprazolam.
Calculate the Number of Tablets:
Number of Tablets = Desired Dose / Available Dose
Number of Tablets = 1.5 mg / 0.5 mg
Number of Tablets = 3
The healthcare provider prescribes metformin 750 mg PO for Type 2 Diabetes Mellitus. Available is 500 mg tablets which are scored. How many tablets should the nurse administer? (Use a preceding, zero if it applies. Do not use trailing zeros. Round to the nearest tenth)
Explanation
Determine the Desired Dose:
The healthcare provider prescribed 750 mg of metformin.
Determine the Available Dose:
Each tablet contains 500 mg of metformin.
Calculate the Number of Tablets:
Number of Tablets = Desired Dose / Available Dose
Number of Tablets = 750 mg / 500 mg
Number of Tablets = 1.5
A client is receive a continuous Heparin infusion at 950 units per hour. Pharmacy supplies Heparin in a concentration of 25.000 units per 250mL of IV fluid. Calculate the rate at which the nurse should set the IV pump. (Use a preceding zero if it applies. Do not use trailing zeros. Round to the nearest tenth).
Explanation
Identify the Desired Dose:
The client needs 950 units of Heparin per hour.
Identify the Available Concentration:
The pharmacy provides Heparin at a concentration of 25,000 units in 250 mL of IV fluid.
Set up the Proportion:
(Desired Dose / Available Concentration) = (Rate (mL/hr) / Volume (mL))
(950 units / 25,000 units) = (X mL / 250 mL)
Solve for X (the Rate):
Cross-multiply: 950 units x 250 mL = 25,000 units x X mL
237,500 = 25,000X
X = 237,500 / 25,000
X = 9.5 mL/hr
At 2100, a client meets sepsis criteria BP 98/52. HR 132. RR 33, core temp 102.1 (38.9 C) pulse ox 92% on 4L with a serum lactate of 4.5. The patient weighs 176.3 pounds. IV 0.9 NSS is prescribed 30 mL/kg over 3 hours. what is the total volume the patient should receive in 3 hours? Round to the nearest whole number, do not use trailing zeros
Explanation
Convert the patient's weight from pounds to kilograms:
176.3 pounds / 2.2 pounds/kg = 80.136 kg (approximately 80.1 kg)
Calculate the total fluid volume based on the prescribed dosage:
30 mL/kg x 80.1 kg = 2403 mL
A client is to receive Valproic Acid 400 mg every 12 hours by mouth. What is the total dosage in milligrams the client should receive in a 24-hour period? (Use a preceding zero if it applies. Do not use trailing, zeros. Round to the nearest whole number)
Explanation
Determine the number of doses in 24 hours:
Since the medication is given every 12 hours, there will be two doses in a 24-hour period (24 hours / 12 hours/dose = 2 doses).
Calculate the total dosage:
Each dose is 400 mg.
Total dosage = 2 doses x 400 mg/dose = 800 mg
A client is to receive 120 mL of IV fluid over a 2-hour period. The drop factor on the IV tubing is 15 gtt/mL. Calculate the rate at which the nurse should regulate the IV (gtt/min).
Explanation
Convert the infusion time to minutes:
2 hours x 60 minutes/hour = 120 minutes
Calculate the flow rate in mL/min:
120 mL / 120 minutes = 1 mL/min
Use the drop factor to convert mL/min to gtt/min:
1 mL/min x 15 gtt/mL = 15 gtt/min
The healthcare provider prescribes 75 mL of IV fluid to be given over a 30-minute period. At what rate should the nurse set the IV pump?
Explanation
Convert the infusion time to hours:
30 minutes / 60 minutes/hour = 0.5 hours
Calculate the flow rate in mL/hr:
75 mL / 0.5 hours = 150 mL/hr
A client is prescribed Acyclovir 350 mg IV. The medication available is a 500 mg vial. Package directions states to reconstitute the powder with 20 mL of sterile water and withdraw the desired amount. PART 2: After withdrawing the required dose, add the medication in 100 mL of IV fluid to run over 1 hour. Calculate the rate to set the IV pump.
Explanation
Calculate the concentration of the reconstituted Acyclovir:
You have 500 mg of Acyclovir in 20 mL of sterile water.
Concentration = 500 mg / 20 mL = 25 mg/mL
Calculate the volume needed for the prescribed dose:
Desired dose: 350 mg
Volume (mL) = Desired dose / Concentration
Volume (mL) = 350 mg / 25 mg/mL = 14 mL
Calculate the total volume for infusion:
The 14 mL of Acyclovir is added to 100 mL of IV fluid.
Total volume = 14 mL + 100 mL = 114 mL
Determine the infusion time in hours:
The infusion is to run over 1 hour.
Calculate the IV pump rate in mL/hr:
IV pump rate (mL/hr) = Total volume (mL) / Infusion time (hr)
IV pump rate = 114 mL / 1 hr = 114 mL/hr
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