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ElectrolytesHoward

QuestionAnswer
Magnesium's effect on nerve impulse inhibits nerve impulse transmission
Magnesium's effect on the instestines Intestinal changes are from decreased intestinal smooth muscle contraction.
The effects of hypomagnesemia are caused by: increased membrane excitability and the accompanying serum calcium and potassium imbalances. Excitable membranes, especially nerve cell membranes, may depolarize spontaneously.
Magnesium's functions: Magnesium is critical for: skeletal muscle contraction, carbohydrate metabolism, (ATP) formation, vitamin activation, and cell growth. Extracellular magnesium regulates blood coagulation and skeletal muscle contractility.
Hyperphosphatemia problems: Results from hypocalcemia problems
Hypermagnesemia may lead to what blood problem: Clotting
Phosphate exists in a reciprical balance b/t which electrolyte? Calcium
Calcium has an inverse relationship with which electrolyte? Phosphate
What happens if there is too little phosphate? There is a lot of calcium, and this causes excitable tissues to be less sensitive to normal stimuli.
What happens if there is too much phosphate? There is less calcium in the blood, and this result in excitable tissues to be more sensitive to normal stimuli
Hypophosphotemia assessment: weak skeletal muscles that may progress to acute muscle breakdown (rhabdomyolysis). The weakness is generalized, paresthesias not present. respiratory movements are ineffective, leading to respiratory failure.
Hypophosphotemia and cardiac muscles: Cardiac depression is caused by low stores of intracellular energy. Without sufficient energy in myocardial cells, contractions are weak and ineffective. Prolonged hypophosphatemia causes progressive but reversible cardiac muscle damage.
Calcium Stabilizes membrane potential
Low serum calcium Allows excitable cells to fire spontaneously
Assessing for hypocalcemia Assess for hypocalcemia by testing for Trousseau's and Chvostek's signs.
Potassium infusion maximun rate 1mEq/10ml maintaining an infusion rate not faster than 5 to 10 mEq of potassium per hour
Potassium Has to to with activating cells -- low = weak response to impulse
Hyponatremia Muscle weakness Check for respiratory muscle functions
Created by: ekm