Calculations Flashcards
1 grain = _ mg
65 mg
1 oz = _ g
28.4 g
1 lb = _ oz
16 oz
Weak Acid Formula
pH = pKa + log [Salt/acid]
Weak Base formulas
pH = (14 - pKb) + log [Base/salt]
or
pH = pKa + log [Base/salt]
1 fl oz = _ mL
30 mL
1 g of nitrogen = _ g of protein
6.25 g
Anion Gap Causes
CUTE DIMPLES
Cyanide
Uremia
Toluene
Ethanol (alcoholic ketoacidosis)
Diabetic ketoacidosis
Isoniazid
Methanol
Propylene glycol
Lactic acidosis
Ethylene glycol
Salicylates
% inonization formula
100/(1+10^[pH - pKa])
Daily Fluid Requirement Formula
1,500 ml + 20 mL (Wt in kg - 20)
Calcium Citrate Elemental Amount
21%
Calcium Carbonate Elemental Amount
40%
_ mg of furosemide = _ mg of torsemide = _ mg of bumetanide = _ mg of ethacrynic acid
All PO
40 : 20 : 1 : 50
Furosemide
_ mg PO = _ mg IV
40 : 20
TEE formula
BEE X activity factor x stress factor
BEE formula is given
What medications should IBW be used to calculate dosing?
Aminophylline
Theophylline
Acyclovir
Levothyroxine
How many particles does Calcium chloride have?
3
Ca + 2 Cl
How many particles does Sodium citrate have?
4
3 Na + C6H5O7
When should you not use the Cockcroft-Gault equation?
ESRD
rapidly fluctuating renal function
reduced muscle mass
* young children
* pts who are missing a limb
* those who are malnourished
select dietary preferences
* vegetarian diet
* creatinine supplements
Alkalosis: _ CO2 & _ HCO3
↓ CO2
↑ HCO3
Acidosis: _ CO2 & _ HCO3
↑ CO2
↓ HCO3
BUN/SCr ratio for dehydration
> 20:1
Dehydration: ↓ intravascular volume
E value formula
(58.5 x i)/(MW x 1.8)
i Value
Number of dissociated ions = i value
1 = 1
2 = 1.8
3 = 2.6
4 = 3.4
pH > pKa
more of the acid is ionized
pH = pKa
ionized & un-ionized forms are equal
pH < pKa
more of the acid is un-ionized
