Bohr Equation

Write about Bohr Equation here.

The Bohr equation is used to derive physiological dead space.  

It may be calculated using the results from an arterial blood gas and End tidal CO2 

Refer to a respiratory physiology text book for an exlanation of how to derive the equation (A-Z of Anaesthesia and Intensive Care).

VD       =      PaCO2 – PETCO

VT                      PaCO2 

VD    =    Dead space 

VT    =    Tidal volume

PaCO2    =    Arterial CO2


PETCO2    =    End tidal CO2