Also I had a question on the multiplying to get the final answer after you have crossed out like figures. Is it that if the number is on the top you multiple it and if the number is on the bottom you divide by it?
Is there a specific order that you do those in? For example on the second problem, You took the 3g/1gxH times the patient's weight (80kg) then did the 1000mL/5000mg. What I'm asking is can the 1000mL/5000mg go last, can you mixed the order up and still get the same answer?
Thank you next question You receive the following order ad are directed to mix a 24 hour supply for the ccu. The doctor wants it mixed in 500 ml of dextrose. You have amiodarone 50mg/ml vials in stock. Amiodarone Give 1mg/min for 6 hours then 0.5 mg/min for the remaining 18 hours (maximum 2.2g/day) 1.How many milliliters of amiodarone will you need to add to the bag?
Hello Kaitlin, Well, all you have to do is calculate how many mg you will give over the 24 hours. It doesn't matter what sized bag you will be putting it in. You will be giving 60 mg/ hour for the first 6 hours. That is 360 mg. The next 18 hours you will be giving 30mg/hour. That is 540 mg. The total is 900mg. You have 50mg/ml. 900 mg (1mL/50mg) = 18 mL. Hope that helps. Dr. Brad
You can download my book, Pharmacy Calculations for Pharmacy Technicians: Solving Pharmacy Calculation Problems Without All the Silly Formulas, for free at payhip.com/b/5xVY. It goes into more detail than possible on the videos and is full of practice problems and answers.
+Yesenia Manzanares Hi Yesenia. You are starting off with 1000 mL/8 h and have to change that to mL/min. You just have to change h to min. 1000 mL/8 h (1 h/60 min)= 2.1 mL/min. All the meq stuff doesn't matter. Hope this helps.
A patient is receiving 30 mEq of KCI in 1 L NS and a 15 drop set is used to deliver 23gtt/min. How many milliequivalents will the patient be receiving each hour? How would you solve this
Hi Kaitlin, Thanks for the question. I had kind of a stressful day and it is nice to have a little puzzle like this to help me relax. This problem is solved like all the conversion and dosage problems. You have 3 things: The units of the answer, the given, and 1 or more ratios which are used as tools to change the units of the given into the units of the answer. The units of your answer are mEq/h. You can think of this as a speed. If you are ending up with a speed, you have to start with a speed. The only other speed given in the problem is 23 gtt/min. Start off by writing these two things down. 23 gtt/min = mEq/h. Now you can see that you have to change gtt to mEq and min to h. Now just arrange the ratios in between. 23 gtt/min (60 min/h)(1 mL/15 gtt)(30 meQ/1000 mL) = 2.76 mEq/h. See how all the units cancel out except mEq/h? If you tried to rely on a bunch of formulas, you would go crazy trying to find one that goes from gtt/min to mEq/h. Hope this helps. Dr. Brad
Rx Claforan 500mg/ml IV 50mg/kg/dose The patient weighs 22 lb. my question is how many minutes will it take to administer the IV it the administration set is calibarted at 20gtt./ml and flow rate is set at 30 gtt./min? i need help:-(
Hi RML. Normally Claforan for IV is 50mg/mL, not 500mg. We will use 50 mg/mL, otherwise the answer will come out to less than 1 minute. First calculate how many mg the pt will need. 22 lb (1kg/2.2 lb)( 50mg/kg/dose)= 500mg/dose.You can do the whole problem in one step, but it is easier to slip it up. This problem has 3 parts. The given (500mg) the units of the answer, and ratios. 500mg (1mL/50mg)(20 gtt/mL)(1 min/30 gtt) = 6.7 min. Hope this helps.
Brad Wojcik i just bought additional book for my PharTech, Pharmacy Calculation by Mike Johnston, the book came with answers but no explanation, this is the whole question: 1.Rx Claforan 500mg/ml IV 50mg/kg/dose The patient weighs 22 lb. a. How many miligrams per dose should the patient receive? the answer is 500mg (i know this answer) b. How many minutes will it take to administer the IV it the administration set is calibrated at 20gtt./ml and flow rate is set at 30 gtt./min? the answer is 33.3 min, "my question is how did they come up with 33.3 min?"
Hi Jeffrey. You first have to determine how many hours the 1.5 L bad will last. This is done the same way as those other three problems. The given is 1.5 L, the units of the answer are hours, and the ratios are 40 mL/h and 1000 mL/L. 1.5L(1000 mL/L)(1 h/40 mL) = 37.5 h. You would want to round down to 37 h, because you don't want to let the bad run all the way out. So, from 8 am Sat to 8 am Sun is 24 h. Then you still have 13 h. That would put it at 9 pm on Sunday. Note that on the two ratios, they both equal 1. The 40 mL/h is what I like to call a custom ratio that only equals 1 for this problem. The 1000 mL/L is and "off the shelf" ratio that always equals 1. Hope this helps. -Dr. Brad
Hey, I came across this problem and was wondering if you can walk me through the problem here An IV is set running by the nursing staff at 50 mL/hr. The 500 mL bag contains 90 mEq of potassium chloride. How many mEq of potassium chloride is the patient receiving each hour? 9 mEq Thanks,
Hi Jeffrey. Thanks for the question. With all of these problems, the first step to stop and think about it before you start trying to solve it. We don't know right away how many mEq he will get in an hour but we know how many mL he he get, 50 mL. Now, how many mEq are in 50 mL. This is a pretty easy one, which you can do ratio proportion, dimensional analysis or in your head. rp: x mEq/50 mL = 90 mEq/500 mL solving for x = 9 mEq. DA: 50 mL(90 mEq/500 mL) = 9 mEq. In your head: There are 90 mEq in 500 mL, 50 mL is 1/10 of 500 mL, so 1/10 of 90 mEq. All in one step 1 hr(50 mL/h)(90 mEq/500 mL) = 9 mEq. If you watch the introduction video you will see that most problems that don't involve mixing or dilution can be done this way. given (ratio(s)) = units of the answer. Let me know if you have any more questions. -Brad
Ok, good. The most important to understand about these problems (conversions, dosage, IV drip problems) is that you are given something to work with (given), the units of the answer and one or more ratios. The ratios always equal 1 and are used as tools to change the units of the given into the units of the answer. If you understand this everything is pretty easy. For example, how many mg in 5 g? They are saying, here is 5 g, tell me how many mg are in the 5 grams. The 5 grams is the given, mg is the units of the answer and the ratio is 1000 mg/g . Now just line them up so the units of the given cancel out and you end up with the units of the answer. 5 g (1000 mg/g) = 5000 mg. In the IV problem, the given is 1 h, the units of the answer is mEq and the ratios are 90 meq/500 mL and 50 mL/h. Both 90 meq/500 mL and 50 mL/h are equal to 1.
+Brad Wojcik thank you for all your help. I am finally getting ready to take the certification exam. I still need to study the top 200 drugs. I tried flash cards, but I never really learned that way. Can you give me some tips on studying common drugs and do you have practice exams? anything helps Thanks,
+Brad Wojcik thank you for all your help. I am finally getting ready to take the certification exam. I still need to study the top 200 drugs. I tried flash cards, but I never really learned that way. Can you give me some tips on studying common drugs and do you have practice exams? anything helps Thanks,
![เจ้าผู้เดียว - ดิด คิตตี้ [OFFICIAL MV]](http://i.ytimg.com/vi/q0NLCYKBOTo/mqdefault.jpg)
I like how he walks in, says " greetings" and gets straight to the point
Lol "it's like a free puzzle" xD
Thank you for the review!
Hi Stacey,
You can put them in any order you wish. Just make sure that the units cancel out correctly.
-Dr. Brad
Also I had a question on the multiplying to get the final answer after you have crossed out like figures. Is it that if the number is on the top you multiple it and if the number is on the bottom you divide by it?
Okay thank you
Is there a specific order that you do those in? For example on the second problem, You took the 3g/1gxH times the patient's weight (80kg) then did the 1000mL/5000mg. What I'm asking is can the 1000mL/5000mg go last, can you mixed the order up and still get the same answer?
Thank you next question
You receive the following order ad are directed to mix a 24 hour supply for the ccu. The doctor wants it mixed in 500 ml of dextrose. You have amiodarone 50mg/ml vials in stock.
Amiodarone Give 1mg/min for 6 hours then 0.5 mg/min for the remaining 18 hours (maximum 2.2g/day)
1.How many milliliters of amiodarone will you need to add to the bag?
Hello Kaitlin,
Well, all you have to do is calculate how many mg you will give over the 24 hours. It doesn't matter what sized bag you will be putting it in. You will be giving 60 mg/ hour for the first 6 hours. That is 360 mg. The next 18 hours you will be giving 30mg/hour. That is 540 mg. The total is 900mg. You have 50mg/ml. 900 mg (1mL/50mg) = 18 mL.
Hope that helps.
Dr. Brad
You can download my book, Pharmacy Calculations for Pharmacy Technicians: Solving Pharmacy Calculation Problems Without All the Silly Formulas, for free at payhip.com/b/5xVY. It goes into more detail than possible on the videos and is full of practice problems and answers.
please help! "KCL 10 mEq and K acetate 15 meq in D5W 1,000 ml is ordered to be administered over 8 hours. what would be the rate in ml/min?"
+Yesenia Manzanares Hi Yesenia. You are starting off with 1000 mL/8 h and have to change that to mL/min. You just have to change h to min. 1000 mL/8 h (1 h/60 min)= 2.1 mL/min. All the meq stuff doesn't matter. Hope this helps.
+Brad Wojcik oh okay now I see. thank you so much for all your help, videos were super helpful, definitely helped me pass the PTCB! :)
A patient is receiving 30 mEq of KCI in 1 L NS and a 15 drop set is used to deliver 23gtt/min. How many milliequivalents will the patient be receiving each hour? How would you solve this
Hi Kaitlin,
Thanks for the question. I had kind of a stressful day and it is nice to have a little puzzle like this to help me relax. This problem is solved like all the conversion and dosage problems. You have 3 things: The units of the answer, the given, and 1 or more ratios which are used as tools to change the units of the given into the units of the answer. The units of your answer are mEq/h. You can think of this as a speed. If you are ending up with a speed, you have to start with a speed. The only other speed given in the problem is 23 gtt/min. Start off by writing these two things down. 23 gtt/min = mEq/h. Now you can see that you have to change gtt to mEq and min to h. Now just arrange the ratios in between.
23 gtt/min (60 min/h)(1 mL/15 gtt)(30 meQ/1000 mL) = 2.76 mEq/h. See how all the units cancel out except mEq/h? If you tried to rely on a bunch of formulas, you would go crazy trying to find one that goes from gtt/min to mEq/h.
Hope this helps.
Dr. Brad
Rx Claforan 500mg/ml IV 50mg/kg/dose The patient weighs 22 lb. my question is how many minutes will it take to administer the IV it the administration set is calibarted at 20gtt./ml and flow rate is set at 30 gtt./min? i need help:-(
Hi RML. Normally Claforan for IV is 50mg/mL, not 500mg. We will use 50 mg/mL, otherwise the answer will come out to less than 1 minute. First calculate how many mg the pt will need. 22 lb (1kg/2.2 lb)( 50mg/kg/dose)= 500mg/dose.You can do the whole problem in one step, but it is easier to slip it up. This problem has 3 parts. The given (500mg) the units of the answer, and ratios. 500mg (1mL/50mg)(20 gtt/mL)(1 min/30 gtt) = 6.7 min. Hope this helps.
Brad Wojcik i just bought additional book for my PharTech, Pharmacy Calculation by Mike Johnston, the book came with answers but no explanation, this is the whole question:
1.Rx Claforan 500mg/ml IV 50mg/kg/dose The patient weighs 22 lb.
a. How many miligrams per dose should the patient receive? the answer is 500mg (i know this answer)
b. How many minutes will it take to administer the IV it the administration set is calibrated at 20gtt./ml and flow rate is set at 30 gtt./min? the answer is 33.3 min, "my question is how did they come up with 33.3 min?"
The problem does not make any sense. Something is wrong. He has 500 mg /ml, and the dose is only 500 mg, so you would administer only 1 ml.
Just go on to the next problem.
Jeffrey- You need to know how many drops per mL to do the problem.
Hi Jeffrey. You first have to determine how many hours the 1.5 L bad will last. This is done the same way as those other three problems. The given is 1.5 L, the units of the answer are hours, and the ratios are 40 mL/h and 1000 mL/L.
1.5L(1000 mL/L)(1 h/40 mL) = 37.5 h. You would want to round down to 37 h, because you don't want to let the bad run all the way out. So, from 8 am Sat to 8 am Sun is 24 h. Then you still have 13 h. That would put it at 9 pm on Sunday.
Note that on the two ratios, they both equal 1. The 40 mL/h is what I like to call a custom ratio that only equals 1 for this problem. The 1000 mL/L is and "off the shelf" ratio that always equals 1. Hope this helps.
-Dr. Brad
Hi Stacey,
You multiply anything above the line and divide by anything below the line.
-Dr. Brad
Hey,
I came across this problem and was wondering if you can walk me through the problem here
An IV is set running by the nursing staff at 50 mL/hr. The 500 mL bag contains 90 mEq of potassium chloride. How many mEq of potassium chloride is the patient receiving each hour? 9 mEq
Thanks,
Hi Jeffrey. Thanks for the question. With all of these problems, the first step to stop and think about it before you start trying to solve it. We don't know right away how many mEq he will get in an hour but we know how many mL he he get, 50 mL. Now, how many mEq are in 50 mL. This is a pretty easy one, which you can do ratio proportion, dimensional analysis or in your head. rp: x mEq/50 mL = 90 mEq/500 mL solving for x = 9 mEq. DA: 50 mL(90 mEq/500 mL) = 9 mEq. In your head: There are 90 mEq in 500 mL, 50 mL is 1/10 of 500 mL, so 1/10 of 90 mEq. All in one step 1 hr(50 mL/h)(90 mEq/500 mL) = 9 mEq. If you watch the introduction video you will see that most problems that don't involve mixing or dilution can be done this way. given (ratio(s)) = units of the answer. Let me know if you have any more questions.
-Brad
Thank you for your quick response. This did help
Ok, good. The most important to understand about these problems (conversions, dosage, IV drip problems) is that you are given something to work with (given), the units of the answer and one or more ratios. The ratios always equal 1 and are used as tools to change the units of the given into the units of the answer. If you understand this everything is pretty easy. For example, how many mg in 5 g? They are saying, here is 5 g, tell me how many mg are in the 5 grams. The 5 grams is the given, mg is the units of the answer and the ratio is 1000 mg/g . Now just line them up so the units of the given cancel out and you end up with the units of the answer. 5 g (1000 mg/g) = 5000 mg. In the IV problem, the given is 1 h, the units of the answer is mEq and the ratios are 90 meq/500 mL and 50 mL/h. Both 90 meq/500 mL and 50 mL/h are equal to 1.
+Brad Wojcik thank you for all your help. I am finally getting ready to take the certification exam. I still need to study the top 200 drugs. I tried flash cards, but I never really learned that way. Can you give me some tips on studying common drugs and do you have practice exams? anything helps
Thanks,
+Brad Wojcik thank you for all your help. I am finally getting ready to take the certification exam. I still need to study the top 200 drugs. I tried flash cards, but I never really learned that way. Can you give me some tips on studying common drugs and do you have practice exams? anything helps
Thanks,