Calcs

1 tablespooon

15 mL

1 oz (liquid)

30 mL

1 cup

8 oz

1 pint

16 oz

1 quart

2 pints

1 gallon

4 quarts

1 oz (weight)

28.4 g

1 pound

454 g

1 grain

65 mg

K, Na, monovalent ions

1 meq=1 mmol

Ca, divalent ions

1 meq = 0.5 mmol

Corrected phenytoin

pheny / [(alb * 0.2) + 0.1)]

MWQ

SR / error rate

CrCl

[(140-age)/(72*SCr)] wt (*0.85 if female)

BSA

Square root of ((ht in cm * wt in kg)/3600)

IBW males

50 + (2.3*every inch over 5 feet)

IBW females

45.5 + (2.3*every inch over 5 feet)

Corrected Ca

Ca level + ((4 - albumin) * 0.8)

LDL

TC - HDL - (TG/5)

TTB (w/ sunscreen)

TTB (w/out sunscreen) * SPF

EN calories

Dex 4 kcal/g

Protein 4 kcal/g

Fat 9 kcal/g

PN calories

Dex 3.4 kcal/g

Protein 4 kcal/g

Lipids (10, 20, 30%) 1.1, 2, 3 kcal/g

Anion Gap

Na - Cl - HCO3

BMI

wt / ht (m2)

AdjBW

IBW + 0.4 (TBW - IBW)

ANC

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

C

(F-32)/1.8

F

(C * 1.8) + 32

pack year smoking hx

cig packs per day * years smoked

MAP

[( 2 * diastolic) + systolic] / 3

Metoprolol IV : PO

1 : 2.5

Levothyroxine IV : PO

0.75 : 1

5 mL Li syrup

= 300 mg Li carbonate = 8 meq

Amino To Theo Conversion

multiply by 0.8

Nitrogen

protein intake (g) / 6.25

TEE =

BEE given activity factor * given stress factor

Fluid needs when > 20 kg

1500 mL + (20 * (wt - 20))

PPM to %

decimal LEFT 4 places

% to PPM

decimal RIGHT 4 places

Exceptions to insulin 1:1

BID NPH to glargine (use 80%)

Tujeo to glargine or levemir (use 80%)

NNT and NNH

1/ARR (decimal)

ARR

% risk control - % risk treatment

HR

HR treatment / HR control

Vd

amount of drug (dose) / concentration of drug (plasma)

Ke

Cl / Vd

Cl

(F * dose)/ AUC

F =

100 * (AUC extravasc/ AUC iv) * (Dose iv / Dose extrascu)

C2 =

C1 * e^(-kt)

half life =

0.693 / ke

LD =

(desired concentration * Vd) / F

KCl 10% solution =

20 meq / 15 mL ?????????????

Ca Carbonate

40% Ca

Ca Citrate

21% Ca

Lasix IV:PO

1:2

Other loops IV:PO

1:1

Ethacryinc acid 50 mg =

Furosemide 40 mg =

Torsemide 20 mg =

Bumex 1 mg

Starting basal bolus in Type I, TDD=

0.5 u/kg/d using TBW

50% basal 50% rapid

split rapid among meals

%w/v

g/ 100 mL

%v/v

mL / 100 mL

%w/w

g/ 100 g

Specific gravity

g/mL

osmolarity (mosmol/L)

(wt/ MW) # particles * 1000

Isotonicity (E value)

(58.5 i) / (MW 1.8)

mEq

( mg * valence) / MW

wt dosing if underweight

TBW

IBW drugs

Acyclovir, aminophylline, levothyroxine, theophylline

AdjBW drugs

aminoglycosides if obese

resp acidosis

low pH, high CO2 > 45

metabolic acidosis

low pH, low bicarb <22

resp alkalosis

high pH, low CO2 < 35

metabolic alkalosis

high pH, high bicarb >26

pH of weak acid =

pka + log (salt / acid)

pH of weak base=

pka + log (base/salt)

Weak acid % ionization

100 / (1+10^(pka-pH))

weak base % ionization

100 / (1+10^(ph-pka)

Risk =

subjects in group / total subject

RR

risk treatment group / risk control group

RRR =

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

OR =

AD / BC

incremental cost ratio =

(C2-C1) / (E2-E1)

Insulin to carb rule of 450 for regular insulin

450 / TDD = grams carbs covered by 1 unit

Insulin to carb rule of 500 for rapid insulin

500 /TDD = grams carbs covered by 1 unit

correction factor 1500 rule for regular insulin

1500 / TDD = CF for 1 unit of regular insulin

Corection factor 1800 rule for rapid insulin

1800 / TDD = CF for 1 unit of rapid insulin

Correction dose insulin

(BG now - target BG) / CF

Ke =

Cl/ vd

C2 =

C1 * e^(-kt)

half life =

0.693/ ke

ke =

(ln (C1/C2)) / t