Monday Lecture: Fluids and Electrolytes

Question 1

What composition is maintenance fluid?

Answer 1

D5 1/2NS + 20 KCl

Question 2

What portion of body weight is each fluid?

Answer 2

•60% of body weight is fluid

• 1/3 of that is extracellular (1/3 of the extracellular fluid is plasma 2/3 is interstitium)
• 2/3 of that is intracellular

Example: 100 kg person
• 60 kg of fluid total
   - 40 kg of intracellular fluid
   - 6.6 kg plasma
   - 13.4 kg interstitial fluid

Question 3

Why is albumin not given to those with burns or severe sepsis?

Answer 3

The holes in the capillaries –actually visible under a microscope –will allow the colloid to leak out and pull fluid into the interstitium.