Deja - Internal - Nephrology Flashcards
ARF - Signs and symptoms NOT 2o to uremia:
- Metabolic acidosis.
- Hyperkalemia –> Arrhythmias.
- Fluid overload –> Pulm. edema, CHF, HTN.
- Hyperphosphatemia.
- HTN 2o to excess renin secretion.
Oliguria - Definition:
Less than 400cc/24h.
What tests would you initially order to evaluate for ARF?
- Urine/serum electrolytes.
- Urine/serum BUN/Cr.
- Urinalysis including urine osmolarity.
What is FENa?
Stands for fractionals sodium excretion and is the best diagnostic test to help discriminate between the different types of ARF.
FENa in Prerenal, renal, and post renal?
Pre –> >2%.
Postrenal –> >4%.
Name the type of ARF associated with the following urinary sediment findings: Red cell casts, urine eosinophils, WBCs, granular casts.
Red cell casts –> GN.
Urine eosinophils –> AIN.
WBC casts –> AIN.
Granular casts –> ATN.
What medications classically cause ATN?
CLAAP
Contrast Lithium Aminoglycosides Amphotericin Pentamine
What are the causes of AIN?
Inflammation of the renal parenchyma caused by:
- Medications: diuretics, NSAIDs, penicillin.
- Infection: CMV, EBV, Toxo, Syphilis.
- Systemic diseases: Sarco, Sjögren.
Uremic syndrome - Cardiovascular:
- HTN
2. Pericarditis
Uremic syndrome - Pulmonary:
- Pleural effusions
2. Pulm. edema.
Uremic syndrome - CNS:
- Asterixis
2. Clonus
Uremic syndrome - Hematology:
- Anemia due to low erythropoietin.
2. Incr. bleeding time due to platelet dysfunction.
Uremic syndrome - GI:
- Nausea
2. Vomiting
Uremic syndrome - Metabolic:
- Acidosis.
- Electrolyte imbalances (especially hyperkalemia).
- Hypocalcemia (lack of vitD).
- Azotemia.
What can be used to measure the severity of CRF?
GFR.