bjwojcik

Pharmacy, Mathematics, Physics, and Educator

Member

All Content by bjwojcik

  1. bjwojcik

    Put Your DA Skills to the Test!

    bjwojcik replied to bjwojcik's topic in General Nursing

    Glad to hear that you like
  2. bjwojcik

    Put Your DA Skills to the Test!

    bjwojcik replied to bjwojcik's topic in General Nursing

    No, I am too old for homework! It is a problem I added for fun in my pharmacy calculations book.
  3. bjwojcik

    Math test help

    bjwojcik replied to cvinson30's topic in Nursing Student Assistance

    Hi, If you do it like this you will never wonder if you did it correctly. 900,000 units (2 mL/1,200,000 units) = 1.5 mL FYI, you should never have naked numbers running around without their units...
  4. bjwojcik

    Am I Smart Enough?

    bjwojcik replied to ebuie17's topic in Pre-Nursing Students

    I have taught pharmacy calculations to pharmacy technicians and pharmacists, and if you learn it correctly in the beginning, it is very simple. Practically all dosage problems, unit conversions, IV...
  5. bjwojcik

    Med math question

    bjwojcik replied to bmsayr01's topic in General Students

    Hi, You are starting with 2 g/h and have to change that to mL/h. You will use the ratio of 40 g/1000 mL to do that. The ratios in these problems always equal 1, so they can be flipped upside down if...
  6. bjwojcik

    Worried about being bad at math!

    bjwojcik replied to Missmfedele's topic in Pre-Nursing Students

    I have taught this subject to pharmacy technician students and written a book on the subject. You can do all unit conversions, dosage problems, iv drip problems, mEq problems the same easy way without...
  7. bjwojcik

    Help with math problems!!****

    bjwojcik replied to NurseMama1210's topic in General Students

    Hi, These problems are all the same. You are given the rate in one form and have to change some of the units so that you end up with the units of the answer. You will use the ratios supplied in the...
  8. bjwojcik

    Dosage Help

    bjwojcik replied to earningitin2018's topic in LPN to RN

    Just an FYI, this is how I would do the problem. You are starting off with 400 mcg/min and have to change that to mL/h. Now you can see that you have to change mcg to mL and min to hours. You use the...
  9. bjwojcik

    Dosage calculations

    bjwojcik replied to SROBISON1's topic in Nursing Student Assistance

    Also, once you have calculated the lower limit you can multiply that by 5/3 to get the upper limit. Basically, you are replacing the 30 mg with 50 mg. Don't take this type of shortcut unless you...
  10. bjwojcik

    Dosage calculations

    bjwojcik replied to SROBISON1's topic in Nursing Student Assistance

    It looks like they are asking for the safe dose range in mg /dose. 55 lb (1 kg/2.2 lb) (30 mg/kg*day)(1 day/4 doses) =187.5 mg/dose See if you can calculate the upper limit. Brad Wojcik, PharmD Note...
  11. bjwojcik

    Dosage Calculations

    bjwojcik replied to nurseontheway's topic in Pediatric

    Also, if the dose is based on weight, you will be starting off with the pt's weight and ending up with dose. Pt weighs 14 kg and is prescribed 30 mg/kg. How many mg? 14 kg (30 mg/kg) = 420 mg. If...
  12. bjwojcik

    Dosage Calculations

    bjwojcik replied to nurseontheway's topic in Pediatric

    Hi, I have taught pharmacy calculations in the past and written a book on the subject, and I have looked at that link and find the methods very confusing. Dosage calculations all boil down to this:...
  13. bjwojcik

    Peds Math

    bjwojcik replied to stasiastar's topic in Pediatric

    Here is another way to look at dosage calculations. The patient is prescribed 220 mg but you need to end up with mL. You will use the ratio of 80 mg/mL to change mg into mL. 220 mg (1 mL/80 mg) = 2.75...
  14. bjwojcik

    Just for fun concentration problem.

    bjwojcik posted a topic in General Nursing

    Hi All, It looks like a lot of you enjoy answering calculation questions, just as I do. I was wondering if any of you would like to try some more challenging problems. These are problems that would...
  15. bjwojcik

    Just for fun concentration problem.

    bjwojcik replied to bjwojcik's topic in General Nursing

    Hi Chare, Thanks for working the problem! I didn't calculate the concentrations of the K+ and Na+, but I got 7.23 mg/mL on the Cl-. Here is my work. Maybe I did it wrong. Calculate weight of Cl- in...
  16. bjwojcik

    Need help with drip rate calculation

    bjwojcik replied to deecole4's topic in Nursing Student Assistance

    Hi KR, Thanks for quoting me and getting the word out on how easy DA is compared to learning a long list of formulas. I have spent most of my time teaching pharmacy technicians but thought I would see...
  17. bjwojcik

    IV Calculations w/ mEq

    bjwojcik replied to janesnow's topic in General Nursing

    I think it is easier to set the problem up like this without relying on a formula. This method allows you to check your work before doing any calculations. You are starting with 250 mL/h and need to...
  18. bjwojcik

    Weight based calculations

    bjwojcik replied to RNSAINT41's topic in Pediatric

    For question #1) If you set the problem up like this, you can check your work before you do any calculations. 14 lb (1 kg/2.2 lb)(15 mg/kg)(5 mL/160 mg) = 3 mL. Also, just an FYI, you should leave a...
  19. bjwojcik

    Need help on this basic med math problem?

    bjwojcik replied to OsceanSN2018's topic in General Students

    You are starting with a rate of 8 milliunits/min and you have to change that to mL/h. Start off by writing the given and the units of the answer. This way you can fill in the ratios easier. 8...
  20. bjwojcik

    mEq Question help

    bjwojcik replied to Apple-Core's topic in Nursing Student Assistance

    This might help explain what a mEq is. Key Concepts to Understanding Milliequivalent Calculations mEq calculations involve quantities of ions and charges, not weights. Think dozens of eggs, not pounds...
  21. bjwojcik

    Need help with drip rate calculation

    bjwojcik replied to deecole4's topic in Nursing Student Assistance

    You can also do it all in one step. Since the entire day's dose will be delivered over 2 h, for the calculation you can write: 22 units/kg/2 h. This is mathematically equivalent to 22 units/kg*2 h....