ATI Flashcards
What is the definition of electrolytes?
Minerals in the body able to conduct electrical charges.
What are electrolytes?
K+
NA+
Calcium
Magnesium
T/F: are electrolytes necessary to sustain life?
True
How can you evaluate electrolytes?
BMP (basic metabolic panel)
CMP (complete metabolic panel)
What is BUN?
Blood urea nitrogen
What is the indication for BUN?
Kidney function
What is CO2?
Carbon dioxide
What is the indication for checking CO2?
Blood bicarbonate level
Hint: mrs. CO needs to check her BBL
What is CR?
Creatinine
What is the indication for checking creatinine?
Kidney function
What is glucose?
Blood sugar
What is CL—?
Chloride
What is K+?
Potassium
What is NA+?
Sodium
What is CA+?
Calcium
What is the indication for checking CA+?
Liver function
What are electrolytes responsible for?
Water balance
pH Balance
Moving nutrients
Removing wastes
Maintain function of:
muscle
heart
nerve
brain
What is 2/3 of a persons weight?
Water
Water balance prevents?
Hypovolemia (low blood volume from blood/fluid loss)
Dehydration
Tachycardia
Tachypnea
Confusion
Headache
Kidney stones
Where does water loss occur?
Kidneys
What is the definition of homeostasis?
State of equilibrium
How do you measure homeostasis?
Serum osmolality (measurement of solutes w/in a solution)
What does serum osmolality indicate?
Status of body fluids
What is the expected range of serum osmolality?
285-295
What does urine osmolality indicate?
Determining renal function and osmolality
What is the expected range for urine osmolality?
50-1,200
What is the intracellular space?
Space inside cells
Hints:
The largest fluid compartment
Holds 67% of body’s water
What is the extracellular space?
Space outside of cells
Hints:
The other 2 fluid compartments
Comprised of the interstitial space (25% body’s water) & the intravascular space (8% of body’s water)
What is osmosis?
Movement of water through a semipermeable membrane
Does osmosis move to a higher or lower concentration?
Lower concentration
What is one homeostatic mechanism the body uses to maintain homeostasis?
Thirst response
What part of the brain determines thirst response?
Lamina terminalis (edge of hypothalamus; senses water balance by osmolality in brain ventricles)
What does the thirst response do?
Promotes drinking water
What another homeostatic mechanism?
Increase in serum osmolality causes the hypothalamus to stimulate the posterior pituitary to release ADH
What is ADH?
Antidiuretic hormone (maintains BP & fluid volume)
AKA vasopressin
How does the ADH interact in the kidneys
Collects in the ducts of the nephrons, increasing water absorption, decreasing urine excretion, increasing fluid volume
What is the last homeostatic mechanism?
Osmosis, allows passive water flow to maintain equilibrium
Hint: maintains homeOstasis
What is the expected range for K+?
3.5-5
What is the expected range for NA+?
135-145
What is the expected range for Calcium?
9-10.5
Hint: I see CA 9-10.5 over there!
What is the expected range for magnesium?
1.3-2.1
Hint:
Magne sees yUM apples for only 1.3- 2.1 dollars
What is diffusion?
Movement of solutes from high to low concentration
What is active transport?
Movement of electrolytes/molecules across cell membrane w/ energy use in the form of enzymes
T/F: diffusion uses energy in the movement of solutes in and out of a cell.
False.
What is the largest intracellular electrolyte?
K+
Hint:
My cells need big P
(I’m sorry mom, I can’t un-remember that now)
What is the function of K+?
For nerve/muscle function
Especially heart
What is the recommended mg intake of K+?
3,400 mg (M)
2,600 mg (F)
What is organ is responsible for 90% of K+ excretion?
Kidneys
How is the remaining 10% of K+ excreted?
Sweating & digestive tract
What is hypoKalemia?
K+ below 3.5
What meds are most common cause of hypokalemia?
Potassium wasting diuretics
(Loop, thiazide, osmotic)
What other meds have the potential to result in K+ loss?
Amphotericin B, high doses penicillin, theophylline
What are diuretics?
Cause increased urination
What are common manifestations of hypokalemia?
Muscle weakness
Cardiac arrhythmias
Constipation
Fatigue
What are life threatening signs of hypokalemia?
Respiratory paralysis
Paralytic ileus
Hypotension
Tetany
Rhabdomyolysis
Life threading cardiac arrhythmias
What might be ordered by the provider to determine K+ levels affect on the heart?
ECG
What are potassium-sparing diuretics?
Meds promoting urination while retaining K+
What are foods high in K+?
Baked potatoes
Prune juice
Carrot juice
White beans
Plain non-fat yogurt
Sweet potato
Salmon
Banana
Spinach
Avocado
What is hyperkalemia?
High K+ levels
What is the most common cause of hyperkalemia?
Renal failure
What are the meds that mostly cause hyperkalemia?
Potassium-sparing diuretics
NSAIDs
ACE inhibitors
What are common manifestations of hyperkalemia?
Nausea/vomiting
Muscle aches/weakness
Decreased deep tendon reflexes
Paralysis
Dysrhythmias/palpations
What are life threatening signs of hyperkalemia?
Paralysis
Heart failure
How is K+ removed from the blood?
Hemodialysis fr renal failure
Calcium gluconate
Diuretics
Resin meds (removes K+ through BM)
What is hypoglycemia?
Blood glucose less then 74
What is the most common extracellular electrolyte?
NA+
What does NA+ do?
Support nerve/muscle function, maintain normal BP, regulate fluid balance
What is hyponatremia?
NA+ below 136
What is the most common cause of hyponatremia?
Loss of body water
What are foods high in NA+?
Roasted ham
Fresh/frozen shrimp
Frozen pizza
Canned soup
Veggie juice
Cottage cheese
Instant/regular vanilla pudding
What is the most abundant mineral in the body?
Calcium, 99% stored in bones & teeth
What is the role of calcium?
Bone mineralization, muscle contraction, nerve transmission, blood clotting, hormone secretion, normal heart function
What does calcium absorption depend on?
Vitamin D
What is the daily intake needed for vitamin D?
600 IU for adults
800 IU for older adults
Where is calcium excreted?
Kidneys
What is calcium controlled by?
Parathyroid hormone
What is hypocalcemia?
Calcium levels below 9
What is hypoparathyroidism?
Low PTH levels
T/F: can decreased estrogen production inhibit calcium absorption?
True
What is osteopenia?
Low bone mass
What are the 2 signs to check for hypocalcemia?
Chvostek sign:
+ = twitching when tapped
Trousseau sign:
+ = carpopedal spasm w/ BP (contraction of wrist and hand)
What is the ionized calcium levels?
Circulating calcium not attached to proteins
What are foods high in calcium?
American cheese
Parm
Plain yogurt
Almond milk
OJ
Soy milk
Low fat milk
Cheddar cheese
Whole milk chocolate
Whole milk
What is hypercalcemia?
Calcium higher then 10.5
What is the mnemonic for hypercalcemia?
Abdominal Moans
Painful bones
Kidney stones
Groans
& neurologic overtones
What is the 2nd most common intracellular electrolytes?
Magnesium
What does magnesium do?
Regulate nerve/muscle function, BP, glucose levels, making DNA, protein, & bone
What is the recommended daily intake for magnesium?
400-420 mg (M)
310-320 mg (F)
What are foods high in magnesium?
Cooked spinach
Pumpkin seeds
Black beans
Cooked soybeans
Cashews
Dark chocolate
Avocados
Tofu
Salmon
Banana
What is half life?
Amount of time is takes 50% of drug to be excreted
What is hypervolemia?
Fluid overload (too much water)
What is apoptosis?
Cellular destruction
What does urine specific gravity?
Test that measures of fluid balance from urine sample
what is fluid volume deficit?
Condition caused by water loss
AKA hypovolemia
What is third spacing?
Movement of fluid from intravascular space (w/in veins) to interstitial space
What is hypovolemic shock?
Body 1/5 (20%) of blood supply
What is creatinine?
Reflection of renal function
Byproduct of skeletal muscle contractions
Excreted through urine
What is hemoglobin?
RBC component that carries O2 & CO2 to/from cell
What is a colloidal solution?
IV solution containing large molecules unable to pass through capillary membranes