Description

Finn et al determined the intracellular potassium concentration based on total body potassium, serum potassium and body water. The authors are from the Auckland Hospital in New Zealand.


 

Parameters:

(1) serum potassium in mmol/L

(2) total body potassium (determined by shadow shield counting of gamma emission from K-40, a naturally occurring isotope of potassium) in mmol

(3) total body water in liters (see Chapter 02).

(4) extracellular water in liters (see Chapter 02)

 

intracellular water in liters =

= (total body water) - (extracellular water)

 

extracellular potassium in mmol =

= (serum potassium in mmol/L) * (extracellular water in liters)

 

intracellular potassium in mmol =

= (total body potassium) - (extracellular potassium)

 

intracellular potassium concentration in mmol/L =

= (intracellular potassium in mmol) / (intracellular water in liters)

 


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