Required Formulas Flashcards

1
Q

1 tsp = ? mL

A

5 mL

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2
Q

1 tbsp = x mL

A

15 mL

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3
Q

1 fl oz = x mL

A

29.57 mL

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4
Q

1 cup = x oz

A

8 oz

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5
Q

1 cup = x mL

A

240 mL (actual 236.56 mL)

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6
Q

1 pint = x oz

A

16 oz (2 cups)

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7
Q

1 pint = x mL

A

480 mL (actual 473 mL)

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8
Q

1 quart = x pint

A

2 pint (4 cup)

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9
Q

1 quart = x mL

A

960 mL (actual 946 mL)

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10
Q

1 gallon = x quart

A

4 quart (16 cups)

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11
Q

1 gallon = x mL

A

3850 mL (3785 mL actual)

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12
Q

1 kg = x lbs

A

2.2 lbs

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13
Q

1 oz = x g

A

28.4 g

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14
Q

1 lb = x g

A

454 gi

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15
Q

1 grain = x mg

A

65 mg (64.8 mg actual)

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16
Q

1 inch = x cm

A

2.54 cm

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17
Q

Convert PPM to percentage strength

A

Move decimal left four places

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18
Q

Convert percentage strength to PPM

A

Move the decimal right four places

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19
Q

IBW calculation for males

A

50 kg + 2.3*inches over 5 feet

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20
Q

IBW calculation for females

A

45.5 kg + 2.3*inches over 5 feet

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21
Q

Adjusted body weight equation

A

IBW+ 0.4(TBW-IBW) [I.e. for each 1 kg that actual body weight exceed ideal body weight, it contributes 0.4 kg to the adjusted body weight]

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22
Q

Cockcroft-Gault Equation

A

(140-age)/[72*SCr] Times weight in kg (x0.85 if female)

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23
Q

Kcal from Dextrose monohydrate?

A

3.5 kcal/gram

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24
Q

Kcal from amino acid solutions?

A

4 kcal/gram

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25
Q

Kcal from IV fat emulsion 10%?

A

1.1 kcal/mL

26
Q

Kcal from IV fat emulsion 20%?

A

2 kcal/mL

27
Q

Kcal from IV fat emulsion 30%?

A

3 kcal/mL

28
Q

Determining fluid needs for weight >20 kg?

A

1500 mL + (20 mL*[weight in kg-20]) (E.g. for each kg over 20, patient needs 20 mL of fluid in addition to 1500 mL)

also estimate using 30-40 ml/kg/day

29
Q

Equation for total energy expenditure

A

TEE = BEE * activity factor * stress factor

30
Q

Calculation for grams of nitrogen from protein

A

Nitrogen (g) = Protein intake (g)/6.25 (i.e. for each 6.25 g of protein, pt intakes 1 g of nitrogen)

31
Q

Corrected calcium when albumin <3.5?

A

Calcium corrected = Reported calcium + [(4.0-albumin)*0.8] (i.e. for each 1 point that albumin is below 4, corrected calcium is 0.8 higher than what is reported).

32
Q

Equation for anion gap?

A

Anion gap (AG) = Sodium - Chloride - HCO3

can also be expressed as AG = Na - (Cl + HCO3)

33
Q

Percent ionization equation?

A

pH = pKa + log (Salt/acid) or pH = pKa + log (base/salt)

34
Q

Calcium salt conversions (i.e. what is elemental calcium for calcium carbonate and calcium citrate)

A
  1. Calcium carbonate = 40% elemental calcium

2. Calcium citrate = 21% elemental calcium

35
Q

Absolute neutrophil equation

A

ANC = WBC * [(% segs + % bands)/100]

36
Q

Risk equation

A

(# of subjects with hazard)/(Total # of subjects)

37
Q

Relative Risk equation

A

(Risk in treatment group)/(Risk in control group)

38
Q

Relative Risk Reduction Equation

A

(% risk in control group - % risk in treatment group)/% risk in control group

39
Q

Absolute Risk reduction Equation

A

(%risk in control group - %risk in treatment group)

40
Q

Number needed to treat equation

A

(1/ARR expressed as decimal)

41
Q

IV:PO conversion Furosemide

A

IV:PO = 1:2

42
Q

IV:PO conversion ethacrynic acid, torsemide, bumeatide

A

IV:PO = 1:1

43
Q

List diuretic equivalent doses for loop diuretic doses, from most potent to least potent

A
  1. bumetanide 1 mg
  2. torsemide 20 mg
  3. furosemide 40 mg
  4. ethacrynic acid 50 mg
44
Q

How to calculate time to burn with sunscreen

A

SPF * Time to Burn without sunscreen

45
Q

What is Rule of 500 for rapid-acting insulin?

A

500/TDD of insulin = grams of carb covered by 1 unit of rapid-acting insulin

46
Q

What is Rule of 450 for regular insulin?

A

450/TDD of insulin = grams of carb covered by 1 unit of regular insulin

47
Q

How to calculate correction dose for insulin?

A

[(blood glucose now)-(target blood glucose)]/correction factor = correction dose

48
Q

How to caclulate correction factor for regular insulin?

A

Rule of 1500: 1500/TDD of regular insulin = correction factor for 1 unit of regular insulin

49
Q

How to calculate correction factor for rapid-acting insulin?

A

Rule of 1450: 1450/TDD of rapid-acting insulin = correction factor for 1 unit of rapid-acting insulin

50
Q

What is Friedewald equation?

A

LDL = TC - HDL - (TG/5)

*Do not use if TG > 400

51
Q

How to correct phenytoin level for hypoalbuminemia?

A

Phenytoin correction = (Total phenytoin measured)/[(0.2*albumin)+0.1] (i.e. corrected phenytoin equals measured phenytoin when albumin = 4.5…)

52
Q

How to calculate minimum weighable quantity for a scale?

A

MWQ = sensitivity requirement / 0.05

53
Q

How to calculate BSA using Mosteller for Oncology

A

BSA = [(Ht in cm * Wt in kg)/3600]^0.5

54
Q

How to convert from celsius to fahrenheit

A

F = (Celsius*1.8)+32

55
Q

How to convert from fahrenheit to celsius

A

C = (Fahrenheit-32)/1.8

56
Q

How to calculate Bioavailability

A

F = 100(AUCextravascular/AUCintravenous)(DoseIV/DoseExtravenous)

57
Q

How to calculate Vd

A

(Amt of drug in body)/(Concentration of drug in plasma)

58
Q

How to caclulate Clearance (two equations)

A

Cl = (F*Dose)/AUC or Ke * Vd

59
Q

How to calculate Ke

A

Cl/Vd

60
Q

How to calculate half-life

A

0.693/Ke

61
Q

How to calculate Loading Dose

A

(Desired concentration * Vd)/Bioavailability

62
Q

List glucocorticoid equivalent doses and list from least potent to most potent

A
  1. Cortisone 25 mg
  2. Hydrocortisone 20 mg
  3. Prednisone 5 mg
  4. Prednisolone 5 mg
  5. Methylprednisolone 4 mg
  6. Triamcinolone 4 mg
  7. Dexamethasone 0.75 mg
  8. Betamethasone 0.6 mg