N360 Math Quiz Practice 4
Just look at picture to understand this one
A. What is the dosage strength of the total vial? 1 gram B. How much dilute the must be added to this vial for reconstitution for IM administration? 3.0 mL C. What is the concentration per mL for the IM solution? 280 mg/mL D. How much dilutents must be added to the vial for IV infusion? 10 mL E. What is the IV concentration per mL for the IV solution? 95 mg/mL
The provider ordered: Klonopin 0.75 mg po tid. The available supply is Klonopin 2.5 mg/ml. How much will the nurse administer? A 1.9 mL B. 0.3 mL C. 0.5 mL D. 3
ANSWER: B. 0.3 mL The provider ordered: Klonopin 0.75 mg po tid. The available supply is Klonopin 2.5 mg/ml. How much will the nurse administer? Step 1: convert? No Step 2: simplify? No Step 3: D/H 0.75mg/(2.5 mg/mL)= B. 0.3 mL
Doctor order: Digoxin 0.05 mg IV tid. Available: 50 mcg/mL. Calculate the amount to be given. Shade the amount in the syringe provided.
ANSWER: 1 mL Doctor order: Digoxin 0.05 mg IV tid. Available: 50 mcg/mL. Calculate the amount to be given. Shade the amount in the syringe provided. Step 1: Convert? Yes. Supply( available units) are in mcg, convert desired (doctor order) mg into mcg. KHDBDCMxxMc 0.05 mg= 50 mcg Step 2: simplify? No Step 3: D/H 50 mcg/(50 mcg/mL) = 1 mL
Calculate the following parenteral dosages. Express dosages to the nearest hundredth where necessary. Doctor's order: procaine penicillins G 175,000 units IM ad Available: 10 mL vial of procaine penicillin G suspension 300,00 units/mL A 1.7 mL B 0.58 mL C 0.6 mL D 1 mL
Answer 0.58 mL Doctor's order: procaine penicillins G 175,000 units IM ad Available: 10 mL vial of procaine penicillin G suspension 300,000 units/mL Step 1: convert? No units and units Step 2: simplify? No Step 3: D/H *don't pay attention to the vial look for the fraction in available to use as your HAVE 175,000 units/ (300,000 units/mL)= 0.58 mL B. 0.58 mL
Calculate the following parenteral dosages. Express dosages to the nearest hundredth where necessary. Shade the amount in the syringe Doctor's order: streptomycin sulfate 0.5 g IM q 12 hr Available 1 g vial of streptomycin sulfate in powdered form with the following instructions: Dilute with 1.8mL sterile water to YIELD 400 mg/mL
Answer 1.25 mL Doctor's order: streptomycin sulfate 0.5 g IM q 12 hr Available 1 g vial of streptomycin sulfate in powdered form with the following instructions: Dilute with 1.8mL sterile water to YIELD 400 mg/mL Step 1: Essential information Desired= Doctor's order= 0.5 g IM q 12 hr Have= YIELD 400 mg/mL. (It's already in fraction form so don't worry about the vial size. The dilute is extra info too). Step 2: Convert? Yes conver 0.5 g into mg because HAVE is in mg KHDBDCMxxMc 0.5 g= 500 mg Step 3: D/H 500 mg/ (400 mg/mL)=1.25 mL
Doctor orders Oxacillin 300 mg IM Vial of powder is labeled 2g Direction on label: Reconstitute with 11.5 mL sterile water to YIELD 250 mg/1.5 mL Administer _____mL Shade the amount in syringe
Answer 1.8 mL Doctor orders Oxacillin 300 mg IM Vial of powder is labeled 2g Direction on label: Reconstitute with 11.5 mL sterile water to YIELD 250 mg/1.5 mL Administer _____mL Step 1: Essential info Desired=orders= 300 mg IM Have=YIELD (fraction)= 250 mg/1.5 mL Step 2: Convert? No Step 3: simplify? Can 250 mg/1.5 mL=166.666667 mg/mL Step 4: D/H 300 mg/ (166.666667 mg/mL) =1.799999 mL ROUND (if answer is >1 round to the nearest tenth, if its <1 round to the hundredth) 1.8 mL
Calculate the following oral dosages. Express doses to the nearest hundredth WHERE NECESSARY. Doctor's order: Penicillin V potassium 1 tsp aid X 10 days Available: 10-g bottle of penicillin V potassium oral suspension with the following instructions: Add 117 mL water to YIELD 200 mL oral solution. Each teaspoon will contain how much? A. 250 mg B. 100 mg C. 2.5 mg D. 10 mg HINT: it's asking for how much in each teaspoon. You're not going to use D/H
Answer A 250 mg/mL Doctor's order: Penicillin V potassium 1 tsp aid X 10 days Available: 10-g bottle of penicillin V potassium oral suspension with the following instructions: Add 117 mL water to YIELD 200 mL oral solution. Each teaspoon will contain how much? Step 1: Essential Info Desired: 1 tsp (doctor's order) Have: YIELD is 200 mL but there's no fraction so look at the size of the bottle (10 g). Have = 10 g/ 200 mL Step 2: conversion? Yes HAVE is in mL units and DESIRED is in tsp. BUT, the question is asking for mg 1) Convert HAVE (10 g/200 mL)INTO mg 1 g = 1000 mg 10 X 1 g= 1000 mg X 10. (Don't do anything with the denominator) 10,000 mg/ 200 mL = HAVE Step 3: Simplify? Can 10,000 mg/ 200 mL= 50 mg/mL Step 4: You HAVE 50 mg/mL, in other words in each mL there is 50 mg of penicillin V potassium Step 5: What is the ORDER? 1 tsp Need to convert to find out how many mL IS IN EACH tsp 1 tsp = 5 mL. Now look at your HAVE 50 mg/mL and multiply it by 5 because in the ORDER you have 1 tsp which =5mL 5 X (50 mg/mL)= 250 mg/mL Answer A 250 mg/mL
Calculate the following parenteral dosages. Express dosages to the nearest hundredth where necessary. Doctor's order: Methicillin 25 mg IM q12hr Available: 1 mL vial of methicillin labeled 35 mg/0.25 mL Nurse will administer _____mL
Answer: 0.18 mL Doctor's order: Methicillin 25 mg IM q12hr Available: 1 mL vial of methicillin labeled 35 mg/0.25 mL Nurse will administer _____mL Step 1: convert? No Step 2: simplify? Yes can. 35 mg/0.25 mL=140 mg/mL Step 3: D/H 25 mg/(140mg/mL)=0.18 mL
Calculate the following parenteral dosages. Express dosages to the nearest hundredth where necessary. Shade the amount in the syringe. Doctor's Order: Atropine 0.2 mg SC stat Available: atropine 400 mcg/mL
Answer: 0.5mL Doctor's Order: Atropine 0.2 mg SC stat Available: atropine 400 mcg/mL Step 1: Convert? Yes. Convert desired g-->mcg (because have is in mcg) KHDBDCMxxMc 0.2 mg= 200 mcg Step 2: simplify? No Step 3: D/H 200 mcg/(400 mcg/mL)=0.5 mL
Calculate the following parenteral dosages. Express dosages to the nearest hundredth where necessary. Shade Thea mount in the syringe provided. Doctor's order: gentamicin 6.4 mg IM q12 hr Available: Gentamicin 10 mg/mL
Answer: 0.64 mL Doctor's order: gentamicin 6.4 mg IM q12 hr Available: Gentamicin 10 mg/mL Step 1: convert? No mg and mg Step 2: simplify? No Step 3: D/H 6.4 mg/ (10 mg/mL)=0.64 mL
Calculate the following parenteral dosages. Express dosages to the nearest hundredth where necessary. Doctor's order: Cefadyl 320 mg IM q6hr Available: Cefadyl 500 mg/1.2 mL A. 0.64 mL B. 0.77 mL C. 0.07 mL D. 1.3 mL
Answer: 0.77 mL Doctor's order: Cefadyl 320 mg IM q6hr Available: Cefadyl 500 mg/1.2 mL Step 1: Convert? No mg and mg Step 2: Simplify? Can 500 mg/1.2 mL=416.66667 mg/mL Step 3: D/H 320 mg/ (416.66667 mg/mL) = 0.77 mL B. 0.77 mL
The doctor orders Mefoxin 1g IM. The vial of powder is labeled 2g. Directions on label: Reconstitute with 4mL sterile water to yield 400 mg/mL. Shade amount in syringe provided Answer:_____mL
Answer: 2.5 mL The doctor orders Mefoxin 1g IM. The vial of powder is labeled 2g. Directions on label: Reconstitute with 4mL sterile water to yield 400 mg/mL. Shade amount in syringe provided Answer:_____mL Step 1: Essential info DESIRED=order=1 g IM HAVE=YIELD (fraction)=400 mg/mL Step 2: Convert? Yes convert desired 1g into mg because HAVE is in mg. 1 g = 1000 mg Step 3: D/H 1000 mg / (400 mg/mL)=2.5 mL
The order reads: Humulin Regular U-100 per sliding scale are For blood sugar: 121 mg/dl to 150 mg/dl give 4 units sc 151 mg/dl to 200 mg/dl give 6 units sc 201 mg/dl to 300 mg/dl give 8 units sc 301 mg/dl to 400 mg/dl give 10 units sc Over 400 mg/dl call MD The patient's blood sugar is 265 mg/dl. Shade the dosage to be given in the appropriate syringe.
Answer: 8 units sc The order reads: Humulin Regular U-100 per sliding scale and the patient's blood sugar is 265 mg/dl. Answer: 8 units sc because sliding scale shows 201 mg/dl to 300 mg/dl give 8 units sc
Doctor's order: Amoxicillin 0.25 g po tid Available: 75 mL bottle of amoxicillin oral suspension 250 mg/5mL Calculate amount given A. 2 mL B. 0.5 mL C. 1 mL D. 5 mL Hint: some extra info, look for fraction!
Answer: D. 5 mL Doctor's order: Amoxicillin 0.25 g po tid Available: 75 mL bottle of amoxicillin oral suspension 250 mg/5mL Calculate amount given Step 1: essential info Desired=doctor's order= 0.25 g Have= oral suspension 250 mg/5mL Step 2: convert? Yes, convert 0.25 g (DESIRED) into mg (because HAVE is in mg units) KHDBDCMxxMc Desired=0.25 g= 250 mg Step 3: Simplify? Can 250 mg/5mL=50 mg/mL Step 4: D/H 250 mg/(50 mg/mL)=5 mL Answer: D. 5 mL
Doctor's order Erythromycin 250 mg po q6hr. Available supply: 200 mg/5mL. Calculate the amount given A. 4mL B. 1.25 mL C. 0.8 mL D. 6.25 mL
Answer: D. 6.25 mL Doctor's order Erythromycin 250 mg po q6hr. Available supply: 200 mg/5mL. Calculate the amount given Step 1: convert? No Step 2: simplify? Yes you can 200 mg/ 5 mL= 40 mg/ mL Step 3: D/H 250 mg/40 mL Answer: D. 6.25 mL
