13 results
Atlas of Urine Microscopy Findings
 • Epithelial cells - Normal
 • Renal tubular cells - Acute
• Red cell casts ... • White cell casts ... infection • Hyaline casts ... disease • Granular casts ... #nephrology #casts
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
Causes of Proteinuria ... sediment - WBC/RBC casts ... polyangiitis (GPA) / microscopic ... #Nephrology #Differential ... #Diagnosis #Algorithm
Algorithmic Approach to Acute Interstitial Nephritis
When to suspect AIN? (not sensitive)
 • AKI, AKD, rapidly progressive
sterile pyuria, WBC casts ... eosinophiluria, microscopic ... , mild tubular proteinuria ... , granular casts ... #nephrology #diagnosis
Causes of Acute Kidney Injury (AKI) - Differential Diagnosis Algorithm
Acute Kidney Injury (AKI) - Acute increase
Epithelial cell casts ... myeloma) • Urate crystals ... polyangiitis /microscopic ... #KidneyInjury #Nephrology ... #Algorithm #Causes
Simplified Approach to Acute Kidney Injury (AKI)
1) IS THIS AN EMERGENCY? 
Is there a dialysis indication
PROBLEM ~80% of AKI cases ... Assess UA w/ microscopy ... for WBCs, RBCs, casts ... , crystals, protein ... #nephrology
Nephritic vs Nephrotic Syndrome

Step 1: If the patient has hematuria and/or proteinuria, think about nephrotic/nephritic syndromes.
Step
hematuria and/or proteinuria ... hematuria (RBC casts ... Syndrome #Comparison #Algorithm ... #Nephrology #Diagnosis
Causes of Hematuria - Differential Diagnosis Algorithm
Red blood cells on urine microscopy. Must exclude false positives
Causes of Hematuria ... Algorithm Red ... RBCs and/or RBC casts ... nephrotic range) proteinuria ... #Algorithm #Causes
Hematuria Workup and Diagnosis Algorithm
 • Confirm hematuria → Urinalysis >3 RBCs/HPF, exclude mimics, repeat testing
Hematuria Workup and Diagnosis ... Algorithm • Confirm ... glomerular bleeding (proteinuria ... , RBC casts, dysmorphic ... → Refer to Nephrology
Hematuria - Differential Diagnosis Framework

Gross Hematuria: Red/Dark urine
 • 1ml blood/liter urine can induce color change
- Differential Diagnosis ... hematuria: - RBC casts ... → Diagnostic of ... Brown urine - Proteinuria ... #nephrology #renal
Causes of Chronic Kidney Disease - Differential Diagnosis Algorithm
Decreased kidney function (eGFR < 60 ml/min/1.73 m2)
Causes of Chronic ... Glomerular (Proteinuria ... Sterile pyuria, WBC casts ... KidneyDisease #Nephrology ... #Algorithm #Causes