Conversions Flashcards
1 tsp
5ml
1 tbsp (T)
15ml
1 fl oz
30ml
1 cup
8 oz
240 ml
1 pint
16 oz
480 ml
1 quart
2 pints
960 ml
1 gallon
4 quarts
3,840mml
1 kg
2.2 lbs
1 oz = g
28.4 grams
1 lb = g
454 grams
1 grain (gr)
65 mg
1 inch = cm
2.54cm
1 meter = cm
100cm
K+, Na+, and other monovalent ions:
1 mEq = how many mmol
1
Ca++, and other divalent ions:
1 mEq = how many mmol
0.5 mmol
1 quart = pint
2 pints
1 gallon = quarts
4 quarts = 3840ml
Normal saline
0.9g/100ml
The ratio of the density of a substance to the density of water
Specific gravity
Dealing with 2 concentrations
Q1 x C1 = Q2 x C2
Dealing with 3 concentrations
Alligation
Cross with “parts”
Osmolarity mOsmol/L =
Wt of substance (g/L)
——————- X (#of particles) X 1,000
MW (g/mole)
-always needs to be normalized to a volume of 1L
Isotonicity equation, E =
(MW)(1.8)
i= dissociation factor, # of particles over 1, add 0.8
Mols =
g/MW
Mmols =
Mg/MW
mEq =
mg x valence ------------- MW OR mmols x valence
Valence of 2
Chelation drug rxns = Ca, iron, magnesium
Everything else has a valence of 1
KCL 10% = 20mEq/15ml
If asked to convert liquid to tabs
Basal Energy Expenditure (BEE) guess
15-25 kcal/kg
Calories provided from macronutrients: carbs (dextrose)
3.4-4 kcal/g
Calories provided from macronutrients: protein (amino acids)
4 kcal/g
Calories provided from macronutrients: fats (lipids)
9 kcal/g
Nitrogen balance
1 g of nitrogen for every 6.25g of protein
ILE stands for
Injectable lipid emulsion
10% ILE =
1.1 kcal/ml
20% ILE =
2 kcal/ml
30% ILE =
3 kcal/ml
________ and _________ bind together in TPN
Calcium and phosphate
- add phosphate first, and calcium near the end
- calcium gluconate has the lowest risk of precipitation
A tube in the nose to the stomach
Nasogastric (NG)
A tube that goes through the skin into the stomach
PEG, G-tube
A tube into the small intestine
Jejunostomy, PEJ, J-tube
BMI =
Kg/m^2
OR
[lb/inch^2] x 703
BMI < 18.5
Underweight
BMI 18.5-24.9
Normal
BMI 25-29.9
Overweight
BMI greater than or equal to 30
Obese
Ideal body weight for males
50kg + (2.3kg)(# on inched of 5ft)
Ideal body weight for females
45.5kg + (2.3kg)(# on inched of 5ft)
When to use adjusted body weight
Calculated when pts are overweight of obese
Adjusted body weight calculation
IBW + 0.4(TBW - IBW)
Weight shown on scale
Actual body weight/Total body weight
BUN:Scr of what indicated dehydration
20:1
Cockcroft-Gault Equation CrCl (ml/min) =
140 - age
———- X kg (0.85 if female)
72 x Scr
Cockcroft-Gault Equation what weight to use
Underweight = TBW Overweight = IBW Obese = AdjBW
If pH > pKa
More of the acid is ionized
If pH =pKa
The ionized form and un-ionized forms are equal
If pH < pKa
More of the acid is un-ionized
Calcium carb percentage strength
40% elemental
Calcium citrate percentage strength
21% elemental
Aminophylline to Theophylline conversion
Amino to theo, multiply by 0.8
Theo to amino, divide by 0.8