Math Flashcards
1 tsp = how many mL
5 mL
1 tbsp = how many mL
15 mL
1 fluid ounce = x mL
30 mL
1 kg = x lbs
2.2 lbs
1 oz = x grams
28.4 grams
1 lb= x grams
454 grams
1 in = x cm
2.54 cm
1 mEq = x mmol for monovalent ions and ex of monovalent ions
1 mmol
K+, Na+
1 mEq = x mmol for divalent ions and example of divalent ions
0.5 mmol
Ca++
x mcg per mg
1000 mcg
what is the gram/mL of NS
0.9 g per 100 mL
What is the w/v of D5W
5% or 5 g per 100 mL
% w/v
grams/100mL
% v/v
mL/100mL
%w/w
grams/100grams
Specific gravity =
grams/mL but is unitless
specific gravity is equivalent to what
density, but density has units (g/mL)
Define osmolarity
the measure of total number of particles (or solutes) per liter of solution, defines as osmoles/liter. solutes can either be ionic (such as NaCl, which dissociates into two solutes insolution, Na and Cl) or non-ionic, which do not dissociate (such as glucose and urea)
mOsmol/L =
wt of substance (g/L) / MW (g/mole) x (# of particles) x1,000
of dissociation particles for Dextrose
1
of dissociation particles for mannitol
1
of dissociation particles for KCL
2
of dissociation particles for NaCl
2
of dissociation particles for sodium acetate
2
of dissociation particles for mag sulfate
2
of dissociation particles for CaCl2
3
of dissociation particles for Na citrate
4
Define isotonic
osmolality is same as blood ~300 mOsmol/kg
What happens if osmolality is higher in one cellular compartment
cause water to move from lower to higher concentration of solutes. fluid will flow into the vein resulting in edema, inflammation, phlebitis and possible thrombosis
mole =
g/MW
mmol=
mg/MW
mEq =
mg x valence / MW
or
mmols x valence
Valence of ammonium cl
1
Valence of KCL
1
Valence of K gluconate
1
Valence of sodium acetate
1
Valence of Na bicarbonate
1
Valence of NaCl
1
Valence of Ca carbonate
2
Valence of CaCl
2
Valence of ferrous sulfate
2
Valence of mag sulfate
2
BMI =
weight (kg) / height (m^2)
IBW (males)
50 kg + (2.3 kg)(# inches > 5ft)
IBW (females)
45.5 + (2.3 kg) (# inches > 5ft)
AdjBW =
IBW + 0.4 ( TBW - IBW)
1mg = x mcg
1000
Cockcroft-gault equation
[140-age / 72 x SCr ] x weight in kg (x0.85 if female)
if something becomes more acidic what is happening to the protons and the pH
concentration is increasing and pH is decreasing
anion gap equation
Na-Cl-HCO3
conversion between aminophylline and thophyline
remember ATM
aminophylline to theophyline multiply by 0.8
ANC calculation
ANC = WBC x [(%segs + % bands)/100]