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NAPLEX Review UWorld > Calculations > Flashcards

Calculations Flashcards

1
Q

1 grain = _ mg

A

65 mg

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2
Q

1 oz = _ g

A

28.4 g

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3
Q

1 lb = _ oz

A

16 oz

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4
Q

Weak Acid Formula

A

pH = pKa + log [Salt/acid]

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5
Q

Weak Base formulas

A

pH = (14 - pKb) + log [Base/salt]
or
pH = pKa + log [Base/salt]

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6
Q

1 fl oz = _ mL

A

30 mL

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7
Q

1 g of nitrogen = _ g of protein

A

6.25 g

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8
Q

Anion Gap Causes

A

CUTE DIMPLES
Cyanide
Uremia
Toluene
Ethanol (alcoholic ketoacidosis)

Diabetic ketoacidosis
Isoniazid
Methanol
Propylene glycol
Lactic acidosis
Ethylene glycol
Salicylates

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9
Q

% inonization formula

A

100/(1+10^[pH - pKa])

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10
Q

Daily Fluid Requirement Formula

A

1,500 ml + 20 mL (Wt in kg - 20)

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11
Q

Calcium Citrate Elemental Amount

A

21%

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12
Q

Calcium Carbonate Elemental Amount

A

40%

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13
Q

_ mg of furosemide = _ mg of torsemide = _ mg of bumetanide = _ mg of ethacrynic acid

All PO

A

40 : 20 : 1 : 50

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14
Q

Furosemide

_ mg PO = _ mg IV

A

40 : 20

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15
Q

TEE formula

A

BEE X activity factor x stress factor

BEE formula is given

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16
Q

What medications should IBW be used to calculate dosing?

A

Aminophylline
Theophylline
Acyclovir
Levothyroxine

17
Q

How many particles does Calcium chloride have?

A

3

Ca + 2 Cl

18
Q

How many particles does Sodium citrate have?

A

4

3 Na + C6H5O7

19
Q

When should you not use the Cockcroft-Gault equation?

A

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

20
Q

Alkalosis: _ CO2 & _ HCO3

A

↓ CO2

↑ HCO3

21
Q

Acidosis: _ CO2 & _ HCO3

A

↑ CO2

↓ HCO3

22
Q

BUN/SCr ratio for dehydration

A

> 20:1

Dehydration: ↓ intravascular volume

23
Q

E value formula

A

(58.5 x i)/(MW x 1.8)

24
Q

i Value

A

Number of dissociated ions = i value
1 = 1
2 = 1.8
3 = 2.6
4 = 3.4

25
Q

pH > pKa

A

more of the acid is ionized

26
Q

pH = pKa

A

ionized & un-ionized forms are equal

27
Q

pH < pKa

A

more of the acid is un-ionized

NAPLEX Review UWorld (17 decks)

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