FP-C Equations & Formulas
PO2 given barometric pressure - ANSWER-O2 Concentration (0.21) x Barometric
pressure
Sea level=760 torr
0.21 x 760 = 159 torr
Percentage of O2 required at higher altitudes
(i.e. if my FiO2 is 0.3 at 10,000 feet, what do I need to increase my FiO2 to at
20,000?) - ANSWER-(%FiO2 x Current barometric pressure) / New barometric
pressure
10,000-20,000 feet: (0.3 x 523) / 349 = 0.44 (New FiO2)
Potential PO2 - ANSWER-FiO2 x 5 = Potential FiO2
0.21 x 5 = 105 (Normal)
PaO2/FiO2 Ratio - ANSWER-Ratio of arterial oxygen partial pressure to fractional
inspired oxygen
Used to distinguish ARDS severity
, Pediatric ETT size - ANSWER-(16+age) / 4
ETT depth - ANSWER-3x tube size
Suction/NG/Foley size - ANSWER-2x ETT size
Chest tube size - ANSWER-4x ETT size
Fluid Resuscitation-Neonate - ANSWER-10mL/Kg
Fluid Resuscitation-Pediatric - ANSWER-20mL/Kg
Fluid Resuscitation-Adult - ANSWER-30mL/Kg
Fluid Mainenance-Pediatric - ANSWER-4-2-1 rule
1-10 kg --> 4mL/Kg (For the first 10kg)
2-20 kg --> 2mL/Kg (For the second 10kg)
>20 kg --> 1mL/Kg (For every Kg above 20)
So, for a 30 kg child, maintenance fluid rate would be:
40 ml/hr + 20 ml/hr + 10 ml/hr = 70 ml/hr
PO2 given barometric pressure - ANSWER-O2 Concentration (0.21) x Barometric
pressure
Sea level=760 torr
0.21 x 760 = 159 torr
Percentage of O2 required at higher altitudes
(i.e. if my FiO2 is 0.3 at 10,000 feet, what do I need to increase my FiO2 to at
20,000?) - ANSWER-(%FiO2 x Current barometric pressure) / New barometric
pressure
10,000-20,000 feet: (0.3 x 523) / 349 = 0.44 (New FiO2)
Potential PO2 - ANSWER-FiO2 x 5 = Potential FiO2
0.21 x 5 = 105 (Normal)
PaO2/FiO2 Ratio - ANSWER-Ratio of arterial oxygen partial pressure to fractional
inspired oxygen
Used to distinguish ARDS severity
, Pediatric ETT size - ANSWER-(16+age) / 4
ETT depth - ANSWER-3x tube size
Suction/NG/Foley size - ANSWER-2x ETT size
Chest tube size - ANSWER-4x ETT size
Fluid Resuscitation-Neonate - ANSWER-10mL/Kg
Fluid Resuscitation-Pediatric - ANSWER-20mL/Kg
Fluid Resuscitation-Adult - ANSWER-30mL/Kg
Fluid Mainenance-Pediatric - ANSWER-4-2-1 rule
1-10 kg --> 4mL/Kg (For the first 10kg)
2-20 kg --> 2mL/Kg (For the second 10kg)
>20 kg --> 1mL/Kg (For every Kg above 20)
So, for a 30 kg child, maintenance fluid rate would be:
40 ml/hr + 20 ml/hr + 10 ml/hr = 70 ml/hr
