Fluid and Electrolytes Flashcards
Normal value for Na+
136-145 mEq/L
Normal value for K+
3.5-5.0 mEq/L
Normal values for Cl-
98-106 mEq/L
Normal values for CO2
22-26 mEq/L
Normal values for Ca+
9-10.5 mEq/L
Normal values Mg+
1.3-2.1 mEq/L
Normal values for PO4- (phospate)
2.7-4.5 mg/dL
Normal values for Serum osmality
280-295 mOsm/kg
Normal value for BUN
10-20 mg/dL
Normal value for Creatinine
0.7-1.5 mg/dL
Normal value for hematocrit
Male: 44-52%
Female: 39-47%
Normal value for glucose
70-110
Antidiuretic hormone (ADH) regulates
the osmolality of the body by influencing how much water is excreted in urine. Synthesized in hypothalamus
Renin-Angiotensin-Aldosterone System regulates
ECF volume by influencing how much Na+ and water are excreted in urine. Also regulates BP
Specialized cells in the kidneys release the enzyme
Renin. which converts angiostensinogen to angiostensin I, which other enzymes in the lung capillaries convert into angiotensin II
Functions of Angiotensin II
vasoconstriction, stimulation of aldosterone release from the adrenal cortex
Aldosterone
circulates the kidneys, causes resorption of Na+ and water
Causes of Fluid volume alterations
Vomiting, diarrhea, fistulas, GI suction, anorexia, inability to obtain fluids
S/S of FVD (Fluid volume deficit)
weight loss tachycardia oliguria, dark yellow urine weak rapid pulse absence of sweat and tears thirst Increased BUN/Creatinine and hct
Fluid volume deficit
Na+ and water intake less than output
Fluid volume excess
expansion of ECF. Na+ and water intake greater than output (retention)
Causes of fluid volume excess (FVE)
Too much salty foods
CHF, Renal failure
Excessive admin of Na+ containing fluids
S/S of FVE (fluid volume excess)
weight gain edema crackles distended veins Decresed BUN/ hct
Hyponatremia
< 135
Water gain, loss of Na+
Causes of hyponatremia
excessive ADH Diuretics Sweating Loss of GI fluids (diarrhea, vomit) Excessive D5W (IV dextrose in water) Adrenal insufficiency
Manifestations of hyponatremia
Anorexia N and V Headaches Lethargy, muscle weakness, confusion Increased ICP Abdominal cramping
Hypernatremia
> 145
Na+ gain, water loss
Causes of hypernatremia
Water deprivation Difficulty swallowing fluids Overuse of table salts Heat stroke Watery diarrhea Hypertonic tube feedings with no water supplements
Manifestations of hypernatremia
Extreme thirst Dry flushed skin Swollen tongue Fever, restlessness Confusion, weakness Sticky mucous membranes
Most predominant electrolyte intracellular
Potassium (neuromuscular function)
Foods high in potassium
Apricots, oranges, banana, dried fruit, cantaloupe, raisins
Hyperkalemia
> 5
High potassium concentration