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Fluid & electrolytes
final patho
Term | Definition |
---|---|
Intracellular | inside cell |
Extracellular | outside of cell but in compartments |
Interstitial | in between cell and compartments |
Hydrostatic pressure | Force of fluid pressure in blood |
Hydrostatic pressure does what with water? | Pushes |
Osmotic pressure | Pressure by solutes in solution |
Osmotic pressure does what with water? | Pulls |
Oncotic pressure | Colloid pressure; due to albumin in blood |
Osmolality | concentration of active particle solutes |
Osmolarity | number of osmoles of solute per liter of solution |
Hyperosmotic | If osmolality is greater than reference solution |
Hypo-osmotic | If osmolality is less than reference solution |
isosmotic | osmolality identical to reference solution |
Tonicity | number of solutes in a solution compared to blood stream |
Isotonic | same tonicity as blood; does not cause fluid shifts or changes in cell size |
Hypotonic | fewer particles in blood' does not cause fluid shift or changes in cell size |
Hypertonic | more particles than blood |
osmoreceptors | located in hypothalamus and stimulated by increased plasma concentration; initiates thirst mechanism and ADH release |
ADH (vasopressins) | synthesized by hypothalamus and released form posterior pituitary; stimulated kidney nephron to reabsorb more water |
Natriuresis | excretion of large amounts of sodium and water |
Edema | excess fluid in compartments (swelling) |
Primary causes of edema | elevated hydrostatic pressure, decreased osmotic forces in blood, liver failure, protein malnutrition |
Hypovolemia | dehydration |
Hypervolemia | over hydrated |
Sodium range | 135-145 |
Hyponatremia | Low sodium |
Hyponatremia s/s | Headache, confusion, coma |
Hyponatremia causes | excess water intake and diuretics |
Hypernatremia | high sodium |
Hypernatremia s/s | lethargy, irritable, seizures, weakness |
Hypernatremia causes | excessive salt intake |
Chloride range | 97-107 |
Hypochloremia | low chloride |
Hypochloremia s/s | hypotension, shallow breathing |
Hypochloremia causes | respiratory acidosis, metabolic alkalosis |
Hyperchloremia | high chloride |
Hyperchloremia s/s | rapid breathing, tachypnea, hypertension |
Hyperchloremia causes | metabolic acidosis, kidney failure |
Potassium range | 3.5-5.1 |
Hypokalemia | low potassium |
Hypokalemia s/s | thready pulse, lethargy |
Hypokalemia causes | diuretics, iv insulin |
Hyperkalemia | high potassium |
Hyperkalemia s/s | cardiac arrythmia, cramping, diarrhea |
Hyperkalemia causes | kidney disfunction, excess potassium intake and ACE inhibitors |
Magnesium range | 1.5-2.4 |
Hypomagnesemia | low magnesium |
Hypomagnesemia s/s | nausea, vomiting, leg cramps |
Hypomagnesemia causes | under nutrition, long term alcohol use |
Hypermagnesemia | high magnesium |
Hypermagnesemia s/s | bradycardia, asystole |
Hypermagnesemia causes | kidney disease, excess magnesium intake |
Calcium range | 8.7-10 |
Hypocalcemia | low calcium |
Hypocalcemia s/s | numbness, tingling |
Hypocalcemia causes | use of diuretics, removal of parathyroid gland |
Hypercalcemia | high calcium |
Hypercalcemia s/s | vomiting, constipation, thirst |
Hypercalcemia causes | overactive parathyroid gland, cancer |
Phosphorus range | 2.5-4.5 |
Hypophosphatemia | low phosphate |
Hypophosphatemia s/s | respiratory insufficiency, bone pain |
Hypophosphatemia causes | Cushing's syndrome, starvation, hyperparathyroidism |
Hyperphosphatemia | high phosphate |
Hyperphosphatemia s/s | hyperreflexia, delirium, seizures, hypotension |
Hyperphosphatemia causes | kidney failure, metabolic/respiratory acidosis |
potassium= | heart |
Sodium= | brain (seizures) |
Serum potassium is always higher where? | inside cell |
Serum sodium is always higher where? | outside cell |
NEVER IV PUSH WHAT = DEATH | POTASSIUM |
EKG T-wave tall | high K+ |
EKG T-wave short | low K+ |
Best way to heat core of body quickly | Heated oxygen |
When calcium rises what happens to phosphorus | goes down |
Positive Chvostek and Trousseau | Hypocalcemia (low calcium) |
When magnesium is high reflexes are? | low |
When magnesium is low what are you at risk for? | heart arrythmias |
Tachycardia | above 100 bpm |
Bradycardia | below 60 bpm |