What is the likely cause of hyponatraemia with hypovolaemia?
Na deficit - Over diuresis
How much water is there in the body and what proportion of weight does it make?
What percentage of total potassium is EC?
What are the major ions of the extracellular compartment?
Na and Cl
What is the equation for O2 delivery?
O2 Delivery = Hb x SaO2 x HR x 1.34
In term of ECV and ICV, compare what happens when water or saline is added or lost from the body?
Water: water will be lost or added to both the ECV and ICV
Saline: saline will be added or lost to only the ECV
What pharmaceuticals increase K flow into cells?
When N/saline is given where does it go predominantly? EC or IC?
What are the major ions of the intracellular compartment?
K and organic anions
Where does saline typically travel to?
(only 3/14 will go to IV)
How much Na and Cl is contained in 1L of normal saline?
What are colloids?
Fluid with large molecules in it
Where does 5% dextrose fluid typically distribute to?
ICS and ECS as water is a total body fluid
What proportion of total body water is extracellular? How it is divided?
Intravascular and extravascular
What is the normal range for K?
High plasma sodium indicates what?
Decreased water intake
Increase water loss - sweating, urination