Required Formulas Flashcards
Nonsterile compounding
MWQ
Minimum weighable quantity
Sensitivity requirements/0.05
IBW males and females
IBW males= 50 + 2.3 *(inches over 5 ft)
IBW females = 45.5 + 2.3 (inches over 5ft)
Phenytoin corretion for hypoalbuminuria?
Can also be used for valproic acid
Total phenytoin measured /[(0.2 x albumin) +0.1]
Elimination rate constant
Cl/Vd
meter (m) = centimeters
100 cm
Sensitivity and Specificity
- Test Result Have Condition Dont Have
- Positive A B
- Negative C D
- Total A + C B+D
- Sensitivity=A/(A+C)x 100
- Specificity= D/(B+D) x 100
BMI
weight in kg/height m^2
Total energy expenditure TEE
BEE * activity factor * stress factor
tsp=ml
5 mL
1 oz = grams
28.4 g
mEq
(mg * valence)/MW
OR
mmols * valence
Calcium _____: __ % elemental
Calcium ____ ___
Carbonate 40%
Citrate 21%
BSA calculation oncology
BSA m2= Sqrt (ht(cmx wt(kg)/3600
Celsius to fahrenheit
(F-32)/1.8
C*1.8 + 32
NNT or NNH-
1/ARR(expressed as a decimal)
How to determine fluid requirements
if > 20 kg
1,500 mL + (20 mL) (wt in kg -20)
Osmolarity
mOsmol/L
= Wt of substance in (g/L) / MW (g/mole) * # of particles * 1000
Absolute neutrophil count (ANC) (cells/mm3)
WBC x [(%segs +%bands)/100]
tbsp=mL
15 mL
Loading Dose (LD)
(Desired concentrations * Vd) / F
Biostatistics:
Relative Risk
Risk=?
Relative Risk=?
Risk= Number of subjects with unfavorable event in group/ total number of subjects in group
RR= Risk in treatment group/ risk in control group
TTB time to burn
TTB ( with sunscreen in min)= SPF x TTB (without sunscreen)
Relative Risk Reduction:
(% risk in control group-% risk in treatment group)/ % risk in control group
Cockcroft gault
CrCl= 140-age/(72*Scr) *wt * (0.85 if female)
Grams of nitrogen from protein
protein intake/ 6.25
1 kg= __lbs
2.2lbs
Dilutions and concentrations
Q1 x C1= Q2 x C2
Q1=old quantity
C1= old concentration
Percent ionization
weak acid and weak base
pH= pKa + log (salt/acid)
weak base: pH=pKa + log (base/salt)
1 oz=mL
30 mL
t1/2
0.693/Ke
Moles or Millimoles
mols=g/MW
mmols= mg/MW
1 gallon= __ quarts = __ mL
4 quarts, 3840 mL