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SIUE Math/physics
Kevin's Lecture 10-12. Math/drug calc
| Question | Answer |
|---|---|
| 1 cc = ? mL | 1 mL |
| 1 cup = ? ounces | 8 oz |
| 1 fl oz = ? mL | 30 mL |
| 1 tablespoon = ? teaspoons | 3 teaspoons |
| 1 tablespoon = ?mL | 15mL |
| 1 teaspoon = ?mL | 5mL |
| 1mm = ?gtts | 15 gtts |
| 1 pint = ?fl oz | 16 oz |
| 1kg = ?lbs | 2.2lb |
| 1lb = ?oz | 16 oz |
| 1 grain (gr) = ?mg | 65 mg |
| 1 gr = ? grains | 15grains |
| 1 inch = ?cm | 2.54 |
| basical formula for calculating drug dosage | Desired dose/amount have X Given volume |
| Medication order is Cefaclor 500 mg PO bid. Pharm stocks in 250 miligram tablets. = how many capsules | 500mg/250mg x 1 = 2 capsules twice a day |
| Amoxicillin 100mg PO qid. (pharm has it 250mg in 5 mL0 | 100mg (desired)/250mg (have) x 5mL (given volume) = 2mL |
| Desired solution strength | the final desired solution strength in fraction form (ex: 1/4 strength of dissinfectant) |
| Desired solution quantity | the final desired solution volume; volume of solution when the solute & solvent are combine |
| solute | substance (solid or liquid) being diluted or dissolved |
| solvent | substance dissolving the medicine; typically a liquid; commonly referred to as the dilutent |
| Calculating Drip Rates (3 factors) | volume (amount of solution or fluid to be given), time (duration over which the IV to be administered), and calibration (drop factor) |
| Drop factor | Number of drops needed to deliever 1 mL of fluid. |
| IV tubing comes in (macrodrip & microdrip) | 10,15,& 20 gtt/mL for maccrodrip and 60gtt/mL for microdrip |
| Drip rate calculation | Drip rate = Volume/Time x Concentration |
| % concentration is measured in | g/100mL |
| % of 1000 = | mg/mL |
| perecent concentration example 2% solution is how many mg/ml | .02 x 1000 = 20mg/mL |
| .75% bupivicaine = mg/mL | 7.5 mg/mL |
| most common concentration of epi | 1:200,000 or 5mcg/mL |
| 25mL vial of 1% lidocaine with 1:500,000 epi concentration how many mg? of lido & epi? | amount = concentration x volume. Lido = 250mg, Epi = 0.05mg |
| 98 F = ? C & conversion | 36.7 C, (F - 32)/1.8 |
| 38C = ? F | 100.4F (C x 1.8) + 32 |
| Normal C? and Critical Celcius temps | Norm is 37.5, critical is 35-39 |
| Boiling point of C, F, & Kelvin | celcius = 100, F = 212, K = 373.15 |
| Freezing points of Celcius, F, & Kelvin | Celcius = 0, F = 32, K = 273.15 |
| O2 tank pressures D, E, H tanks | psi 2200 for all, D= 412 Liters, E= 660 Liters, & H = 6900 Liters |
| Dalton's Law | total pressure of a mixture is equal to the sum of the partial pressus of the individual gases. |
| 1 atmosphere is | 760mmHg |
| saturated water vapor pressure is | 47mmHg (or 6% of atmospheric) |
| Components of Air | Nitrogen 78.08%, O2 20.95%, Argon 0.93%, CO2 .03% |
| 1 grain = ? mg | 65 mg |
| 1 gram = ? grain | 15 grain |
| 1 inch = ? cm | 2.54cm |
Created by:
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