Osmolarity Calculations Review | 5 Key Examples Solved

[@raadhejazin2056]

DR. Danquah is truly one of the best professors I have come across, I can not express the magnitude these videos have helped me through my education.

[@bebo7181]

In the second question, the question asked for the osmolarity of 2 L, and the equation we used gives us the osmolarity in one liter, so we should have multiplied the last number by two to get the answer for two liters, is thst correct ?

[@PharmaceuticalCalculationsEasy]

Thank you Bebo for watching and for the comment. Osmolarity is mOsm/L and so is independent of the volume. Thus the osmolarity of the D5 1/2NS solution in the question will be the same in 2 L as it is in 1 L. Hence, there is no need to multiple the "last number" by 2. Hope this helps.

[@nancyraad8551]

@@PharmaceuticalCalculationsEasy so the mentioning of the volume is to confuse us? And if they asked to calculate the mOsmol in the 2 L, we would then multiply by 2?? Thank you so much for all your helpful videos.

[@cheezyvloging6142]

​@@PharmaceuticalCalculationsEasy Oh it really helpful ,i was also thinking the same point .Your videos are very helpful

[@agusta6587]

@@PharmaceuticalCalculationsEasy Very confused...the First Question had to do with 200 ml...and there was an adjustment made....shouldn't there be an adjustment in the 2000ml this time as well?

[@kingsleyboakye8540]

You are awesome Dr. Danqua...Keep up the wonderful job you are doing. Your videos have helped me tremendously.

[@PharmaceuticalCalculationsEasy]

Thank you Kingsley for watching and for the kind comment. Glad you found the videos helpful. Keep up the good work.

[@philipraphael3676]

A great comeback after almost a month! superb explanation and tutoria Doctor

[@PharmaceuticalCalculationsEasy]

Thanks a lot Philip for the kind comment and for being an active supporter of the channel.

[@thelastbraincell565]

Hello Sir! Thank you for the video. I wanted to ask how do you calculate the percentage concentration of normal saline from normality in the second question?

[@Sunshine_7x]

Great video! I understood these examples but I'm having trouble with this one? May you please make a video for it?
At 3:00 PM, the pharmacist received an order to add 30 mEq/L of potassium chloride to the already running intravenous fluid for the patient. After checking the medication order, the pharmacist found that the patient is receiving dextrose/0.9% sodium chloride infusion at a rate of 85 mL/hour and that the patient's liter of fluid started at 1:30 PM.
(a) Assuming it took 30 minutes to provide the needed potassium chloride to the patient's running IV fluid, how many milliequivalents of potassium chloride should have been added to achieve the ordered concentration?
(b) How many milliliters of an injection containing mEq of potassium chloride/mL should have been used to supply the amount of potassium chloride needed?
(c) What was the osmolality of the infusion with potassium chloride added? Assume complete dissociation of the sodium chloride and potassium chloride.

[@user-kt9ed2zu4b]

Thank you so much you are the greater dr i have seen
Realy love your chanel

[@PharmaceuticalCalculationsEasy]

Thank you for the kind comment. Keep up the great work.

[@renitafernandez2641]

Thank you so much

[@PharmaceuticalCalculationsEasy]

You're most welcome Renita. Thank you for watching and for the comment. Welcome to the Pharmaceutical Calculations community.

[@atpt3667]

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