Fluid and Electrolytes Flashcards
What is Fluid
Fluid is necessary for life and homeostasis. 60% of the human body is fluid. It exists in two compartments Extracellular (outside the cell) & Intracellular (inside the cell). 2/3 of the fluid is in the intracellular space.
What are Electrolytes?
Active ions that carry charges.
Cations are Na+, Ca+, K+, Mg+
Anions are Cl-, HC03-, P04-
Concentrations vary depending on the compartment
Magnesium Lab Value
1.8 -2.6
Sodium Lab Value
135-145
Potassium Lab Value
3.5-5
Calcium Lab Value
8.8-10.4
Phosphate Lab Value
2.5-4.5
Chloride Lab Value
98-106
Regulation of Fluid
Movement of fluid through capillary walls depends on differences of hydrostatic & osmotic pressure.
Osmotic Pressure
Movement of fluid from a greater concentration to a lower concentration
Hydrostatic Pressure
pressure exerted on the walls of the blood vessel
What is the difference between hypotonic and hypertonic?
Hypotonic- hydrates the cell
Hypertonic - Fluid moves out of the cell
Lifespan Consideration for Infants and Children (Less than 2 yr.)
Infants have an increased risk of fluid and electrolyte imbalance because they have a higher respiratory rate & metabolic rate and immature kidneys. When infants are FVD their mucous membranes are dry, sunken soft spot and become lethargic.
***AT MOST RISK is preterm infants because of immature kidneys effect their ability to concentrate urine
Lifespan Consideration for Older Adults
The thirst sensation in the elderly is blunted resulting in decreased fluid intake. Decrease body mass which decreases the amount of water in the body. Decreased renal reserve due to decrease in the number of nephrons.
What is a consideration with gender?
Males have a decreased amount of fat in comparison to females. Fat= water content
What is a consideration for African Americans?
They have increased sensitivity to salt.
What are causes of Fluid Volume Deficit?
Vomiting
Diarrhea
Decreased fluid intake
Third space fluid shifts- which fluid becomes inaccessible to the body ex- Burns