How do you calculate extracellular fluid volume?

How do you calculate extracellular fluid volume?

A simple tool is the 60-40-20 rule. Approximately 60% of body weight is water (TBW), 40% of body weight is ICF, and 20% is ECF. (ICF is 2/3 of TBW, i.e., 40% of body weight; ECF is 1/3 of TBW, i.e., 20% of body weight.)

What is extracellular fluid volume?

Regulation of Arterial Pressure The ECF volume is the sum of the plasma volume and interstitial fluid volume. Plasma makes up about 58% of the blood volume. Blood volume is typically about 5 L, whereas ECF volume is about 14 L. Thus blood comprises about 36% of the ECF volume.

How do you calculate osmolarity of ECF?

Calculated osmolarity = 2 (Na+) + 2 (K+) + Glucose + Urea (all in mmol/L); OR Calculated osmolarity = 2 (Na+) + Glucose + Urea (all in mmol/L).

How is intracellular fluid measured?

Intracellular fluid volume – Cannot be measured directly but can be calculated by subtracting ECFV by TBW, as the latter two variables are measurable. Interstitial fluid volume – Cannot be measured directly but can be calculated by subtracting PV by ECFV, as the latter two variables are measurable.

Which are examples of preformed water?

What are examples of preformed water:

• Water in an apple.
• Water in a baked potato and steak dinner.
• Water in a glass of milk.

What is difference between ECF and ICF?

Intracellular fluid (ICF) is the cytosol within the cell. Extracellular fluid (ECF) surrounds the cells serves as a circulating reservoir. The ECF is divided into the interstitial fluid which bathes the outside of the cells and intravascular fluid (i.e., plasma, lymph, and cerebral spinal fluid).

What are the 26 body fluids?

It makes up about 26% of the total body water composition in humans. Intravascular fluid (blood plasma), interstitial fluid, lymph and transcellular fluid make up the extracellular fluid….Body fluid

• amniotic fluid.
• aqueous humour.
• bile.
• blood plasma.
• breast milk.
• cerebrospinal fluid.
• cerumen.
• chyle.

What is the difference between metabolic water and preformed water?

Water Intake Fluid can enter the body as preformed water, ingested food and drink, and, to a lesser extent, as metabolic water that is produced as a by-product of aerobic respiration and dehydration synthesis.

How much water resides in the extracellular fluid compartment?

Extracellular compartment Its extracellular fluid (ECF) contains about one-third of total body water.