math stuff Flashcards
1 oz = __ g
28.4 g
1lb = __ g
454 g
1 grain= __ mg
64.8 mg
1 meter is ___ cm
100 cm
percentage strength=
100/ ratio strength
ratio strength=
100/percent strength
ppm to percent strength
decimal to the left 4
percent strength to ppm
decimal to the right 4
SG=
g/ml
mosmol/l=
(g/mw)xpx1000
E=
(58.5)(i)/(MW)(1.8)
mols=
g/mw
mmols=
mg/mw
mEq=
(mgxvalence)/MW or
mmolsxvalence
carbs and protein
4cal/gtam
fat
9cal/gram
dextrose
3.4 cal/gram
amino acid solm
4 cal/gram
ile 10
ile 20
ile 30
10- 1.1 cal/ml
20-2 cal/ml
30- 3cal/ml
glycerol/glycerin
4.3 cal/gram
daily fluid needs
1500+(20)(kg-20)
TEE=
BEExAFxSF
grams of nitrogen from protein
N=protein intake in grams/6.25
crcl
(140-age)x(kg)/(72xscr). X0.85 if female
ibw
male- 50+2.3(in over 60)
female- 45.5+2.3(in over 60)
adjusted bodyweight
ibw+0.4(tbw-ibw)
if underweight which weight to use for drug dosing
TBW
for most drugs which weight to use for drug dosing
TBW
drugs that require special dosing depending on weight
acyclovir aminophylline theophylline levothyroxine aminoglycosides
acyclovir aminophylline theophylline levothyroxine if normal weight or obese use which weight
IBW
for aminoglycosides if obese use
adjusted bodyweight
bun:scr for dehydration
> 20:1
AG
na-cl-hco3
weak acid pH calculation
pH=pka+log(salt/acid)
weak base pH calculation
pH=pka=log(base/salt)
pkb=
14-pka
%ionization weak acid
100/1+10^pka-pH
%ionization weak base
100/1+10^pH-pka
ANC=
WBCx(segs+bands/100)
C=
F-32/1.8
F=
CX1.8+32
TTB (in min)
spfxttb(without sunscreen)
mean
avg
median
value in the middle of an ordered list
mode
value that occurs most frequent
risk
subjects with unfavorable event/total number in a group
Relative RIsk
risk in treatment/risk in control
Relative Risk Reduction
1-RR
Absolute risk reduction
%risk control-%risk treatment
NNT or NNH
1/ARR (arr is expressed as a decimal
OR
(AD)/(BC)
Hazard ratio
hazard rate in treatment/hazard rate in control
initiating basal bolus insulin in type 1 diabetes
- calculate TDD using TBW (0.5 u/kg/day)
- divide into 1/2 basal and 1/2 rapid acting
- if using nph/r, use 2/3 and 1/3
- split the rapid among meals
insulin to carbohydrate ratio for rapid acting insulin
500/TDD= grams of carb covered by 1 unit of insulin
insulin to carb ratio for regular insulin
450/TDD=grams of carb covered by 1 unit of insulin
correction factor for rapid acting
1800/TDD= correction factor for 1 unit of insulin
correction factor for regular insulin
1500/TDD= correction factor for 1 unit of insulin
correction dose
(bg now)-(target bg)/(correction factor)
friedwald equation for LDL
LDL= TC-HDL-TG/5
do not use if TG are abpve 400
MWQ
=sensitivity requirement/0.05
bioavailability (F%)
100x(aucE/aucI)x(doseI/doseE)
volume of distribution
vd=amt of drug in body/concentration in plasma
cl=
kxv
cl=
dose/auc
k=
c/vd
predicting drug concentrations 1st
c2=c1xe-kt
prediciting drug concentrations 2nd
ke=ln (c1/c2)/t
t1/2
=0.693/k
loading dose=
conc.des.xVd/F
phenytoin (mcg/ml)=
(phenytoin)/(0.2xalbumin)+0.1
kcl 10%=
20MEQ/15ml
calcium carbonate
40%
calcium citrate
21%
aminophylline to theophylline
ATM (multiply by 0.8)
theophylline to aminophylline
divide by 0.8
loops
E 50
F 40
T 20
B 1
furosemide iv to po
IV:PO
1:2
all other loops 1:1
metoprolol IV:PO
1:2.5
Iron
sulfate
gluconate
sulfate: 20%
gluconate: 12%
insulin conversions usually
1: 1 except
- NPH dosed BID to glargine dosed daily
- toujeo to lantus
- toujeo to basaglar
levothyroxine IV to PO
IV:PO
0.75:1
statins
pharmacists rock at saving lives and preventing flu P2 R5 A10 S20 L40 P40 F80
Steroids
cute hot pharmacists and physicians marry together and deilver babies
Cortisone 25 Hydrocortisone 20 Prednisone 5 Prednisolone5 Methylprednisolone 4 Triamcinolone 4 Dexamethasone 0.75 Betamethasone 0.6
5 mL lithium citrate syrup=___ mg lithium carbonate = ___ meq lithium ion
300mg lithium carbonate, 8 meq lithium ion
