Acid-Base Flashcards
what is the acid base mnemonic?
ROME
Respiratory
Opposite
Metabolic
Equal
in acid-base disorders, if the opposing value is abnormal and the pH is still abnormal, then _____ ________ has occurred
partial compensation
in acid-base disorders, if the opposing value is abnormal and the pH is normal, then _____ ________ has occurred
full compensation
what are the symptoms of metabolic acidosis?
“KUSSMAUL”
Kussmaul respirations
Urine changes (pH)
Stupor (mental confusion)
Signs of hyperkalemia (muscle twitching)
Malaise
Abdominal pain
Urine output changes
Low blood pressure
what is the initial compensation for metabolic acidosis?
hyperventilation to breath off CO2
the difference between the measured cations and anions in the blood
anion gap
how to calculate anion gap?
Na - (Cl + HCO3)
how to calculate anion gap with normal levels of albumin?
albumin x 3
what are 3 endogenous causes of anion gap metabolic acidosis?
DLC
Diabetic Ketoacidosis
Lactic acidosis
Chronic Kidney Disease
what are 4 exogenous causes of anion gap metabolic acidosis?
MEAT
Methanol poisoning
Ethylene glycol/antifreeze
ASA overdose
Toluene (paint/glue sniffing)
what is the most common cause of non-anion gap metabolic acidosis?
type II renal tubular acidosis (proximal)
unable to reabsorb HCO3
what 2 conditions is type I renal tubular acidosis most common in?
Sjogren’s
glue/paint sniffing
what is the most common cause of type IV renal tubular acidosis?
diabetes mellitus
what causes pancreatitis, panniculitis, polyarthritis, blurred vision and fatigue in metabolic acidosis ?
hyperglycemia
what causes CNS abnormalities in metabolic acidosis?
ethylene glycol poisoning
what causes retinal edema in metabolic acidosis?
methanol intoxication
what cause osteoporosis and fractures in metabolic acidosis?
CKD
what is the general treatment for metabolic acidosis if etiology is unknown and pH < 7.1? (4)
IV sodium bicarbonate
dialysis
treat hyperkalemia
consult Nephrology
what is the treatment for metabolic acidosis caused by DKA? (4)
IV fluids
IV potassium replacement
IV insulin (if K > 3.3)
IV bicarb (if pH < 6.9)
what is the treatment for metabolic acidosis caused by lactic acidosis?
IV Na bicarbonate
what is the treatment for metabolic acidosis caused by salicylate overdose? (3)
IV Na bicarbonate
Fluids
Glucose for CNS
what is the treatment for metabolic acidosis caused by alcohol overdose? (5)
IV/IM thiamine
saline
K+
phosphate
magnesium
what is the treatment for metabolic acidosis caused by methanol intoxication? (2)
fomepizole +/- dialysis
what is the treatment for metabolic acidosis caused by diarrhea?
Na bicarbonate
what are 2 treatment options for renal tubular acidosis I (distal)?
sodium bicarbonate
potassium citrate
what are 3 treatment options for renal tubular acidosis II (proximal) that is exogenous?
remove offending agent
what are 3 treatments for renal tubular acidosis II (proximal) that is caused by fanconi?
bicarb
vit D
phosphate replacement
what are 3 treatments for renal tubular acidosis IV that is caused by primary adrenal insufficiency?
fludrocortisone
saline
loop diuretics
+/- restrict potassium
what are the symptoms of metabolic alkalosis?
ALKA-LOSIS
Apathy
Loss of potassium (hypokalemia)
Kicking muscle cramps
Anorexia
Light-headedness
Ocular disturbance
Slow respirations (hypoventilation)
Increased neuromuscular excitability
Seizures
what is the initial compensation for metabolic alkalosis?
hypoventilation to retain CO2
most common cause of metabolic alkalosis and characterized by normotensive, dehydration, and hypokalemia
saline-responsive metabolic alkalosis
cause of metabolic alkalosis characterized by hypertension and edema
saline-unresponsive metabolic alkalosis
what is the primary saline-unresponsive metabolic alkalosis?
hyperaldosteronism (excess mineralocorticoid) due to renal tumor
what is the treatment for saline-responsive metabolic alkalosis? (6)
IV fluids
IV KCl
acetazolamide OR spironolactone
stop diuretics
stop NG tube suction and add PPI
+/- dialysis
what is the treatment for primary saline-unresponsive metabolic alkalosis? (4)
remove mineralocorticoid-producing tumor
replete K
replete spironolactone
+/- O2 ventilation