Electrolyte Flashcards
Carry electrical charge
(+)- H, Na, K, Mg, Ca
(-)-Cl, S, P, Bicarb
Electrolyte
Elderly and Obese Risk
Dehydration due to fat and inability to regulate Na and water
Molecules increase Oncotic Pressure
Na, Glucose, Lipid, Protein
Excess fluid within interstitial spaces
Edema
Venous obstruction cause increase hydrostatic pressure
Fluid moves from cap to interstitial
cause: thromboplebitis, hepatic obstruction, prolong standing, tight clothes
Edema (venous obstruction)
decrease plasma albumin production
cause: kidney disease, hemorrhage, cirrhosis, burn
Edema (protein Loss)
capillary permeability
cause: inflammation, trauma, burn, alergy
edema (increase capillary permeability)
lymphatic channel obstruction
cause- lymph node removed or inflammed
edema ( obstructed lymph)
increase hydrostatic pressure in capillary
cause: heart and renal failure
edema (salt n water retention)
limited to site
distribution of fluid in interstitial space through body
interstitial space, pericardial, pleural
-may result in dehydation
localized
generalized
third space
thirst mechanism
secreted from hypothalamus
pituitary secretion when plasma osmolality increase, decrease Blood volume, decrease bp
ADH
secreted from adrenal to kidney to absorb sodium
aldosterone
released from heart when stretched, tells kidney to urinate and decrease aldosterone
Atrial Natriuretic Peptide
Low potassium and high sodium cause release of
aldosterone
Normal sodium levels in body
136-145 mEq/L
Neck vein distention, increase BP, weight gain, edema, heart failure
TBW change and electrolyte
hemorrhage, wound drainage, excessive diaphoresis (sweat)
Isotonic fluid loss
Excess IV fluid, hypersecretion aldosterone, drugs
excess isotonic fluid loss
High NA in blood, serum NA>147mEq/L
From increase NA or net water loss, cell shrink, tachy, flushed dry skin, hypertension, thirst, elevate temp, weight loss
Hypernatremia
inappropriate hypertonic solution
Over secretion aldosterone (cushing’s), NA reabsorbtion from kidney
Overingestion thru diet
Disease of Hypertonic fluid
Intracellular overhydration (edema) serum NA
Hyponatremia
dehydration of vessels, insufficient sodium and water
hypovolemia
normal 3.5-4.5
conducts nerve and muscle contraction
major intracellular electrolyte
Potassium (K)