117 results
Simplified Approach to Acute Kidney Injury (AKI)
1) IS THIS AN EMERGENCY? 
Is there a dialysis indication
require urgent nephrology ... IMPROVEMENT If the urine ... you confirmed diagnosis ... etiologies due to ATN ... #nephrology
Fractional Excretion of Sodium - FENa
Fractional Excretion of Sodium (FENa) = (Urine Na+ x Serum Cr)
Sodium (FENa) = (Urine ... / (Serum Na+ x Urine ... > 2% suggests ATN ... Excretion #Sodium #nephrology ... #calculation #diagnosis
Guide to Acute Kidney Injury (AKI)

What to ask/look for: 
 - HPI, PMH, full ROS
UOP/weights - Urine ... Liano 1996) - ATN ... CKD— 13% (mostly ATN ... AcuteKidneyInjury #AKI #Nephrology ... #Diagnosis #Algorithm
Urine Specific Gravity - Interpretation
Specific Gravity = Density of urine / Density of water
SG close to
Urine Specific Gravity ... Gravity = Density of urine ... resistance to ADH) • ATN ... Interpretation #diagnosis ... #differential #nephrology
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
Causes of Proteinuria ... - Differential Diagnosis ... #Proteinuria #Nephrology ... #Differential #Diagnosis ... #Algorithm #Causes
Hematuria Workup and Diagnosis Algorithm
 • Confirm hematuria → Urinalysis >3 RBCs/HPF, exclude mimics, repeat testing
Hematuria Workup and Diagnosis ... → Refer to Nephrology ... cystoscopy • Refer to Nephrology ... if cause not identified ... uw_IMresidency #Hematuria #Diagnosis
Hematuria - Differential Diagnosis Framework

Gross Hematuria: Red/Dark urine
 • 1ml blood/liter urine can induce color change
- Differential Diagnosis ... 1ml blood/liter urine ... → Diagnostic of ... #Differential #Diagnosis ... #nephrology #renal
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
- Differential Diagnosis ... Algorithm Urine ... #Differential #Diagnosis ... #Algorithm #causes ... #nephrology
Urine Microscopy - Casts
Acellular Casts
 • Hyaline Casts - Consists of only precipitated Tamm-Horsfell protein without
Urine Microscopy ... tubular necrosis (ATN ... #Urine #Microscopy ... #nephrology #interpretation ... #diagnosis
Distal Renal Tubular Acidosis (RTA)  Type 1 

Totally scuppers the kidney's acidification mechanism. Will be
much easier to diagnosis ... with direct urine ... Failure to acidify urine ... #Management #Nephrology ... #Causes #Differential