Guest guest Posted July 1, 2003 Report Share Posted July 1, 2003 Thank you. Lynn > Lynn you asked for the calculations relating to compressed-air at 1.3 ata. > > 1 atm abs is equivalent to a pressure exerted by 760 mm Hg, which is now > known as 760 Torr after Torricelli - the inventor of the mercury barometer. > > Alveolar gases 1 atm abs air 1.3 atm abs air > > Pressure 760 Torr 988 Torr > > Partial pressure of O2 159 Torr 207 Torr > dry air (pO2) > > Saturated H2O 49 Torr 49 Torr > vapour pressure > > Max pO2 110 Torr 158 Torr > > Substract pCO2 10 Torr 10 Torr > > Max arterial pO2 100 Torr 148 Torr > > Best wishes > Philip Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 25, 2004 Report Share Posted June 25, 2004 neetu, 1) How many 30 mg tablets of potassium permanganate are needed to make a 600 mL of a 1:5000 solution? a) 1:5000 solution is 1 G/ 5000 mL - you want to make conversions so that you are working in all the same measurements - 1 G (of drug) = 1000 mg in determining the amount of drug needed to create a final concentration, you compare your known final concentration to the unknown drug over the known final volume 1000mg/5000mL = x/ 600 ml x (being the amount of drug - KMnO4) = 1000mg*600mL/5000mL = 120 mg c) You need 120 mg of KMnO4 to make the appropriate solution; using tablets =30 mg ea.: 30 mg/1tab = 120 mg /x x = 4 tabs 2) Rx: Ferrous Sulfate 100 mg po tid x 10 D. Stock: 473 mL bottle of 220mg/5mL What volume is to be dispensed? a) Total amount needed for prescription: 100 mg x 3 doses/day x 10 days = total of 3000 mg needed you can solve using d/h x q or ratio:proportion Desired (d) = 3000 mg Have (h) = 220 mg Quantity (q) = 5 mL 3000 mg/220 mg x 5 mL = 68 mL ratio:proportion >> 220 mg/5 mL = 3000 mg /x mL They work out the same - just the initial layout is different. 3) Cost of 1/2 oz of Zinc Oxide is $0.84. Mark up = 10%; dispensing fee = $2.50. What is the cost of 120 Gm of ung? a) conversion - ounce to grams: 1 ounce = 30 Gm therefore 1/2 = 15 Gm - you can either do the mark up now or after you find the cost of the 120 Gm; you will add the dispensing fee at the end. 15 Gm = $0.84: 15 Gm/0.84 = 120 Gm /x 120 Gm cost is $6.72 c) mark up (10%) : $6.72 *1.1 = 7.392 d) add dispensing fee: $7.392 + $2.50 = $9.89 (or they may round up to $9.90) Hope this helps, Respectfully, Anne P LaVance, BS, CPhT Instructor Pharmacy Technician Program Delgado Community College New Orleans, LA TEXTPERT Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 25, 2004 Report Share Posted June 25, 2004 neetu, 1) How many 30 mg tablets of potassium permanganate are needed to make a 600 mL of a 1:5000 solution? a) 1:5000 solution is 1 G/ 5000 mL - you want to make conversions so that you are working in all the same measurements - 1 G (of drug) = 1000 mg in determining the amount of drug needed to create a final concentration, you compare your known final concentration to the unknown drug over the known final volume 1000mg/5000mL = x/ 600 ml x (being the amount of drug - KMnO4) = 1000mg*600mL/5000mL = 120 mg c) You need 120 mg of KMnO4 to make the appropriate solution; using tablets =30 mg ea.: 30 mg/1tab = 120 mg /x x = 4 tabs 2) Rx: Ferrous Sulfate 100 mg po tid x 10 D. Stock: 473 mL bottle of 220mg/5mL What volume is to be dispensed? a) Total amount needed for prescription: 100 mg x 3 doses/day x 10 days = total of 3000 mg needed you can solve using d/h x q or ratio:proportion Desired (d) = 3000 mg Have (h) = 220 mg Quantity (q) = 5 mL 3000 mg/220 mg x 5 mL = 68 mL ratio:proportion >> 220 mg/5 mL = 3000 mg /x mL They work out the same - just the initial layout is different. 3) Cost of 1/2 oz of Zinc Oxide is $0.84. Mark up = 10%; dispensing fee = $2.50. What is the cost of 120 Gm of ung? a) conversion - ounce to grams: 1 ounce = 30 Gm therefore 1/2 = 15 Gm - you can either do the mark up now or after you find the cost of the 120 Gm; you will add the dispensing fee at the end. 15 Gm = $0.84: 15 Gm/0.84 = 120 Gm /x 120 Gm cost is $6.72 c) mark up (10%) : $6.72 *1.1 = 7.392 d) add dispensing fee: $7.392 + $2.50 = $9.89 (or they may round up to $9.90) Hope this helps, Respectfully, Anne P LaVance, BS, CPhT Instructor Pharmacy Technician Program Delgado Community College New Orleans, LA TEXTPERT Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 25, 2004 Report Share Posted June 25, 2004 neetu, 1) How many 30 mg tablets of potassium permanganate are needed to make a 600 mL of a 1:5000 solution? a) 1:5000 solution is 1 G/ 5000 mL - you want to make conversions so that you are working in all the same measurements - 1 G (of drug) = 1000 mg in determining the amount of drug needed to create a final concentration, you compare your known final concentration to the unknown drug over the known final volume 1000mg/5000mL = x/ 600 ml x (being the amount of drug - KMnO4) = 1000mg*600mL/5000mL = 120 mg c) You need 120 mg of KMnO4 to make the appropriate solution; using tablets =30 mg ea.: 30 mg/1tab = 120 mg /x x = 4 tabs 2) Rx: Ferrous Sulfate 100 mg po tid x 10 D. Stock: 473 mL bottle of 220mg/5mL What volume is to be dispensed? a) Total amount needed for prescription: 100 mg x 3 doses/day x 10 days = total of 3000 mg needed you can solve using d/h x q or ratio:proportion Desired (d) = 3000 mg Have (h) = 220 mg Quantity (q) = 5 mL 3000 mg/220 mg x 5 mL = 68 mL ratio:proportion >> 220 mg/5 mL = 3000 mg /x mL They work out the same - just the initial layout is different. 3) Cost of 1/2 oz of Zinc Oxide is $0.84. Mark up = 10%; dispensing fee = $2.50. What is the cost of 120 Gm of ung? a) conversion - ounce to grams: 1 ounce = 30 Gm therefore 1/2 = 15 Gm - you can either do the mark up now or after you find the cost of the 120 Gm; you will add the dispensing fee at the end. 15 Gm = $0.84: 15 Gm/0.84 = 120 Gm /x 120 Gm cost is $6.72 c) mark up (10%) : $6.72 *1.1 = 7.392 d) add dispensing fee: $7.392 + $2.50 = $9.89 (or they may round up to $9.90) Hope this helps, Respectfully, Anne P LaVance, BS, CPhT Instructor Pharmacy Technician Program Delgado Community College New Orleans, LA TEXTPERT Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 9, 2004 Report Share Posted July 9, 2004 Hi Hope I can help in solving this problem. Â The total solution of I.V.= 500ml D5W + 10 ml Isoproterenol HCl = 510 ml total 1 gram is equal to 1,000,000 mcg Therefore there is 1,000,000 mcg / 5000ml IsoP To calculate the amount of mcg of IsoP in the 510 ml : 1,000, 000 mcg = X mcg -------------------------- 5000 ml 10 ml Therefore the 10 ml of IsoP added to the D5W has 2000 mcg IsoP in it The 510 ml also has 2000 mcg IsoP. So therfore, we calculate how many ml are equal to 5mcg: 2000 mcg IsoP 5mcg -------------- = --------- 510 ml X ML X= 1.28 ml Thus the flow rate of the infusion is 1.28 ml/min so as to provide 5mcg of isoproternol HCl per min. Plz others see if it is correct. Thanks Hemali On Sat, 10 Jul 2004 neetu452004 wrote : >hi if u can please help me with this >Â An i.v infusion contains 10 ml of 1:5000 sol. of Iso protel hcl & >500 ml of a 5% dextrose inj. at what flow rate should the infusion be >given to provide 5mcg of isoprotel hcl per min. ? > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 27, 2005 Report Share Posted October 27, 2005 If you check the first two files on calculating appropriate fat intake, etc., they have different information. One says to use 1.5 and 2.5 for max/min fats, the other says 2.5 and 3.5. Which one? Also, if you check teh various articles on cod liver oil, one says to use it in the summer, the other contradicts it and says to use it in the winter. Problems? Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 27, 2005 Report Share Posted October 27, 2005 Yes, , I screwed up writing some of the articles, and got summer and winter crossed. Sorry. There is a range of fats to proteins that can be applied in different cases. Those who are overweight will want to use 1.5, but the rest of us can range from 2.5 to 3.5. Go to the Optimal Diet website to read the articles about it. Bee > > If you check the first two files on calculating appropriate fat intake, etc., they have different information. One says to use 1.5 and 2.5 for max/min fats, the other says 2.5 and 3.5. Which one? > > Also, if you check teh various articles on cod liver oil, one says to > use it in the summer, the other contradicts it and says to use it in > the winter. > > Problems? > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 6, 2008 Report Share Posted August 6, 2008 Dear Rose, First of all if you don't have a study guide book please borrow, or check out one from a library or buy one. See my files on this for recommendations. Next: Go to the files section and find the 5th Folder then the 8th folder to the Math Tutorials. These are FREE and as good as any book. But I always recommend both. Files > 5- Tutorial-1 & Study Information > S 8- Math Tutorials Only /files/5-% 20Tutorial-1%20%26%20Study%20Information/S%208-%20Math%20Tutorials% 20Only/ Also visit my link section, also the 5th folder for links to math sites that can help you that have nursing calculations (we do about 80% of what they do) and othe pharmacy math sites. I have math quizzes and so does Techlectures.com But first you need the foundation and basics. So afrer you study the beginning and when or if yo have questions post them here and we can help you. So get STARTED that is the first step! You made a good choice by coming here, crack a book or tutorial and get started. Read and study the best you can and then post what you do not understand. Hopefully you are not on a time limit to take the exam. But whether you are or not you need to pace yourself. Respectfully, Jeanetta Mastron CPhT BS Chem Pharm Tech Educator Founder/Owner of this site > > I need help with calculations. I am practicing for the PTCB exam in > September. I could use all the help I can get. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 6, 2008 Report Share Posted August 6, 2008 Dear Rose, You will have to copy the whole link then paste it or you can use www.tinyurl.com to make a shorter link to use. Of course you can just go to the Files section Folder # 5 then Folder # S8 as directed too. Jeanetta Mastron CPhT BS F/O > > > > I need help with calculations. I am practicing for the PTCB exam in > > September. I could use all the help I can get. > > > Quote Link to comment Share on other sites More sharing options...
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