# All Other-medical-calculators Formulas List

## Body Surface Area (BSA) - Mosteller

#### Formula:

BSA (m2) = √([Height (cm) x Weight (kg)]/ 3600)

## Body Surface Area (BSA) using DuBois

#### Formula:

BSA = 0.20247 x h0.725 x w0.425

Where,

b = Body surface area (m2)
w = Weight (kg)
h = Height (m)

## Blood Sugar (Glucose) Level Converter

#### Formula:

Conversion from Conventional to SI unit:
1 mg/dL = 1/18.15 mmol/L

## Outpatient Revenue Percentage

#### Formula:

Outpatient revenue percentage = (Total outpatient revenue / Total revenue) x 100

## Prothrombin Time - International Normalized Ratio (INR)

#### Formula:

INR = (PT patient/PT normal)ISI
The INR is calculated from the following formula:
* PT patient = patient's measure PT (seconds)
* PT normal = laboratory's geometric mean value for normal patients (seconds)
* ISI = International Sensitivity Index

## Blood Sugar (Glucose) Conventional

#### Formula:

Blood sugar conversion from mg/dL to mmol/L (conventional unit to SI Unit)
1 mg/dL = 1/18.15 mmol/L

Decimal: milligrams per deciliter (mg/dL) (USA value)
Metric: millimoles per liter (mmoles/L)

## Number Needed to Treat (NNT)

#### Formulas Used:

1 / ((Ctrl.Gr.(w/ Cond) / Ctrl.Gr.(Total)) - (Act.Tx Gr.(w/ Cond) / Act.Tx Gr.(Total))

Ctrl.Gr.(Total) = No. of People in Control Group
Ctrl.Gr.(w/ Cond) = No. of People in Control Group who develop condition of interest during time interval
Act.Tx Gr.(Total) = No. of People in Active Treatment Group
Act.Tx Gr.(w/ Cond) = No. of People in Active Treatment Group who develop condition of interest during time interval

## Hemocytometer

#### Formula

Hemocytometer Calculations Suppose that 20 cells are counted in the cytometer, area 1 mm2 and depth 0.02 mm.Calculate the total number of cells in the original volume of 5 cm3 of broth.
* Vol of chamber = 1 mm x 1 mm x 0.02 mm = 0.02 mm3
* 1 cm3 = 1000 mm3 ? vol = 2 x 105 cm3
* ? concentration = 20/(2 x 105) = 106 cells per cm3
* ? number in 5 cm3 = 5 x 106 cells

## Allowable Blood Loss (ABL)

#### Formula:

EBV = Weight * ABV
ABL = [EBV x ( Hi - Hf )] / Hi

Where,

ABL = Allowable Blood loss
ABV = Average Blood Volume
EBV = Estimated Blood Volume
Hi = Initial Hematocrit
Hf = Final Hematocrit

## Cerebral Perfusion Pressure (CPP) in Brain

#### Formula:

CPP = MAP - ICP OR CPP = MAP - CVP

Where,
MAP = Mean arterial pressure.
ICP = Intracranial pressure.
CVP = Central venous pressure.

## Odds Ratio (OR) - Disease Risk

#### Formula

Odds ratio = ( a / c ) / ( b / d )

## Patients Average Length of Stay - ALOS, LOS

#### Formula:

Length of Stay = date of discharge - date of admission
Average length of stay = Length of stay / Total number of discharges

## Hair Growth

#### Formula:

L = t * 0.5

Where,

L = Hair Grow Length
t = Hair Grow Time

## Gross Death Rate

#### Formula:

r = ( n / t ) * 100

Where,

r = (Hospital) Gross Death rate
n = Number of Deaths of Inpatients in a Period
t = Number of Discharges ( Including Deaths ) in the Same Period

## Opioid Dose

#### Formula:

d = ( c * 0.15 ) + ( f * 2.4 ) + ( h ) + ( p * 4 ) + ( m * 4 ) + ( e ) + ( o * 1.5 ) + ( x * 3 ) + ( t * 0.367 ) + ( l * 0.2 )

Where,

d = Total Daily Morphine Equivalent Dose
c = Codeine
f = Fentanyl transdermal
h = Hydrocodone
p = Hydromorphone
e = Morphine
o = Oxycodone
x = Oxymorphone

## Unsaturated Iron Binding Capacity (UIBC)

#### Formula:

UIBC = T - I

Where,

U = Unsaturated Iron Binding Capacity
T = Total Iron Binding Capacity
I = Serum Iron

## PAPP-A IU/I to MOM Converter

#### Formula:

P = M / 2.26

Where,

P = Pregnancy Associated Plasma Protein-A in MOM
M = Pregnancy Associated Plasma Protein-A in IU/I

## HCG IU/I to MOM Conversion

#### Formula:

H = M / 43.6

Where,

H = Human Chorionic Gonadotropin (HCG) in MOM
M = Human chorionic gonadotropin (HCG) in IU/I

## Excision of Skin Lesion

#### Formula:

T = W + (M × 2)

Where,

T = Total Coded Size
W = Widest Measurement of Lesion
M = Margin

p = n * 2.247

Where,

n = ng/mL
p = pmol/L

n = p/2.247

Where,

p = pmol/L
n = ng/mL

## TIBC

#### Formula:

TIBC = Serum Iron + UIBC

Where,

TIBC = Total Iron Binding Capacity
UIBC = Unsaturated Iron Binding Capacity

## IV Infusion Pump

#### Formula:

Infusion Pump Flow Rate = Volume(ml) / Time

## Body Fluid

#### Formula:

TBF for Men = 2.447 - 0.09156 x Age + 0.1074 x Height + 0.3362 x Weight
TBF for Women = -2.097 + 0.1069 x Height + 0.2466 x Weight

#### Formula:

Hospital Admits per 1000 = No. of People Admitted ×1000 / No. of People Visits

## Cumulative Incidence

#### Formula:

Cumulative Incidence = 1 - e(-IR x D)

Where,

IR = Incident Rate
D = Duration
e = 2.7182818284590452

## Impedance Medical

#### Formula:

Z = √(X² + R²)

α (degrees) = arctangent (X / R)

C (picofarads) = 10000000 / π x X / (X² + R²)

Where,

Z = Impedance
X = Reactance
R = Resistance
α = Phase Angles
C = Capacitance