NCLEX Formulas

mean arterial pressure

SBP + (2 x DBP) / 3
Tip: > 65 mmHg needed for organ survival.

Calculate adult fluid needs?
Calculate fluids for children?

30 ml/kg
20 ml/kg

Calculate Cardiac Output

SV x HR

Rule of 9's for Adults

9% head
9% each arm
8% each leg
18% front torso
18% back torso

Parkland Formula
Note: Fluid required for the first 24 hours - usually Lactated Ringer's - after burn

4 mL/Kg/TBSA%
Note: First half of the fluid is given within 8 hours from the burn incident, and the remaining over the next 16 hours.
If 2 hrs passed getting to the hospital the first 8 hrs of fluid will need to be completed in 6 hrs.

Urine outputs

Adult: 0.5 mL/kg/hr
Children: 0.5-1.0 mL/kg/hr

Absolute Neutrophil formula

(% Neutrophils + % Bands) x WBC/100=

Convert Fahrenheit to Celsius

C = F - 32 / 1.8

Convert Celsius to Fahrenheit

F = 1.8*C + 32

Pulse pressure

Systolic - Diastolic = PP
Tip: A high pulse pressure (>100) combined with bradycardia and an irregular breathing pattern is associated with increased intracranial pressure.