Exam 3- Fluids and Electrolytes Flashcards
What maintains homeostasis?
Fluids and electrolytes
Why are fluids essential for the body?
- GI absorption of nutrients
- transport of nutrients, electrolytes, and 02 to cells
- regulation of body temp
- transport cellular wastes
- lubrication of joints and membranes
- medium for food digestion
What is the primary source of fluid loss?
URINATION. urine output.
Sensible versus Insensible
Sensible-CAN SEE via sweat, losing water and electrolytes
Insensible- respirating air, CANNOT SEE the h20 loss and no electrolyte loss. From lungs and skin.
What are the 2 diff fluid compartments?
Intracellular fluid (ICF) and Extracellular fluid (ECF)
What is the most prevalent cation and anion in ICF?
K+
P04- Phosphate-
Fluid w/in cells
What is the most prevalent cation and anion in ECF?
Na+
Chloride-
interstitial
intravascular- plasma needs blood test
6 ways to control fluid and electrolyte movement
- Diffusion- 02 from lungs to body
- Facilitated Diffusion- lock and key no ATP required
- Active Transport- 3 Na+ out, 2 K+ in
- Osmosis- High to Low conc.
- Hydrostatic Pressure- BP pushes everything out of cap. beds
- Oncotic pressure
Oncotic pressure involves?
Albumins- Albumins stay in the CV system and attracts h20 & keeps fluid vol and oncotic pressure going.
What is first fluid spacing?
everything in homeostasis, normal distribution of fluid
What is second fluid spacing?
abnormal accumulation of interstitial fluid..EDEMA/SWELLING
What is third fluid spacing?
Fluid accumulation in part of body where it is not easily exchanged with ECF. TRAPPED w/in compartments (pleura, cv areas, brain, synovial sac) body c/n excrete it regularly
What is ascites?
Fluid accumulation in abdominal cavity, seen in alchys.
What are S and Sx of hypernatremia?
THIRST CNS deterioration- osmoreceptors in brain not triggering thirst but body is dehydrated but doesn't drink h20 Increased interstitial fluid TIERD/LETHARGIC AGITATION SEIZURES COMA
What are two things that may be going on with hypernatremia?
- H20 loss- increased amounts of H20 loss therefore blood vol. becomes concentrated with Na+
- Sodium gain- Dietary meds cont. Na+ and kidney disfunction t/4 Na+ builds up in blood and cells crenate becoming dehydrated because h20 goes into the hypertonic blood.