1.06 - Fluid Compartments Flashcards
1
Q
What are the three major fluid compartments in the body?
A
Total Body Water (TBW) Intracelular Fluid (ICF) Extracellular Fluid (ECF)
2
Q
What is the approximate size of the ICF?
A
27L –> ~60% of TBW
3
Q
What is the ionic composition of the ICF?
A
High: K+, Mg2+
Low: Na+, Cl-, Ca2+
4
Q
What is the approximate size of the ECF?
A
18L –> 40% of TBW
5
Q
What is the ionic composition of the ECF?
A
High: Na+, Cl-, Ca2+
Low: K+, Mg2+
6
Q
What are the sub compartments of the ECF?
A
Plasma
Interstitial Fluid
Transcellular Fluid
7
Q
How are fluid compartments volumes measured?
A
Put a known volume of indicator in
Extract a sample of compartment fluid to measure how it is diluted
Calculate the volume based on dilution
