"On the Exam" Per Professor Whitton Flashcards
How to calculate restricted fluids for ARF patient
Allow 500mL for insensible losses and add the fluid amount excreted from previous 24 hours.
Example:
Pt with ARF excretes 325mL of urine in 24 hours, allow 825mL for next 24 hrs.
(500mL + 325mL = 825mL)
Maintenance Phase of ARF
- significant fall in GFR
- oliguria may develop
- Azotemia
- fluid retention
- electrolyte imbalances
- metabolic acidosis
What to monitor for Hyperkalemia
- BP
- apical HR
- serum K+ level
- continuous cardiac monitoring is highly recommended
What to Administer for Hyperkalemia
- electrolyte binding and electrolyte excreting meds (Kayexalate)
- 50% dextrose and insulin
- Calcium gluconate
- NaHCO3
- loop diuretics
What to avoid with Hyperkalemia
- High K+ foods
- K+ sparing meds
What would you potentially need to prepare the patient for with Hyperkalema
-peritoneal or hemodialysis
Hypermagnesemia Causes
Mg is Regulated by the kidneys and necessary for cardiac function
caused by renal patients receiving magnesium supplements
decreased renal excretion of magnesium
Hypermagnesemia clinical manifestations
- depresses CNS
- cardiac dysrhythmias (PVC’s and VF)
What to administer for hypermagnesemia
- loop diuretics
- calcium
What to avoid with hypermagnesemia
- antacids
- laxatives
- enemas
Phosphate
- major role in nerve, RBC, and muscle function
- maintains acid base balance
- kidneys excrete phosphate
- inverse relationship with calcium
Phosphate has an inverse relationship with…
Calcium
Hyperphosphatemia causes
chronic renal failure and/pr excessive Vit D intake
Hyperphosphatemia Effects
- decreased serum calcium levels
- Tetany
Increased phosphorus levels leads to….
decreased Ca+ levels which leads to stimulation of parathyroid hormone with leads to bone demineralization
What to administer with Hyperphosphatemia
- TUMS (phosphate binders)
- calcium acetate (PhosLo)
- Sevelamer (Renagel) with meals
- Stool softeners because phosphate binders are constipating
What to avoid with Hyperphosphatemia
-aluminum hydroxide preps
Hypocalcemia causes
- CRF
- vit D deficiency
- loop diuretics (Lasix)
- increased phosphate levels
Hypocalcemia effects
- stimulate PTH to release Ca+ from bone
- Chovstek’s sign
- Trousseau’s
- Tetany/seizures
What to administer for Hypocalemia
-calcium supplements and activated Vit D
Metabolic Acidosis
-kidneys unable to excrete hydrogren ions
OR
-manufacture bicarb resulting in acidosis
What to administer for Metabolic Acidosis
-NaHCO3 (alkalizers)
CRF patients adjust to ….
low HCO3 levels and do not become acutely ill
Rifle Criteria
Risk:
-Increased SCreat x1.5 or GFR decrease >25%.
-UO less than .5ml/kg/h for 6 hrs
Injury:
-Increased SCreat x2 or GFR decrease >50%.
-UO less than .5ml/kg/h for 12 hrs
Failure:
-Increased SCreat x3 or GFR decrease >75%. OR SCreat greater than or equal to 4mg/dL
-UO less than .3ml/kg/h for 24 hrs or Anuria for 12 hrs
Loss:
-Persistent ARF= complete loss of kidney function more than 4 weeks
ESKD:
more than 3 months
**RIF= High Sensitiity
**LE= High Specificity