13 results
Sulfa Crystals on Urine Microscopy
Sulfa Crystal!  Drug-induced crystalluria is a cause of acute renal failure
Urine Microscopy ... crystalluria is a cause ... of acute renal ... #Urine #Microscopy ... crystalluria #clinical #nephrology
Atlas of Urine Microscopy Findings
 • Epithelial cells - Normal
 • Renal tubular cells - Acute
Atlas of Urine Microscopy ... • Red cell casts ... • White cell casts ... disease • Granular casts ... #casts
The head impulse test (HIT) result is positive (abnormal) in nearly all patients with a peripheral
#Diagnosis #PhysicalExam ... #Neurology #AVS ... Peripheral #Central #HeadImpulse ... #Testing #HIT # ... HINTS
Urine Microscopy - Casts
Acellular Casts
 • Hyaline Casts - Consists of only precipitated Tamm-Horsfell protein without
Urine Microscopy ... suggestive of acute ... in a variety of acute ... #Urine #Microscopy ... #nephrology #interpretation
Simplified Approach to Acute Kidney Injury (AKI)
1) IS THIS AN EMERGENCY? 
Is there a dialysis indication
PROBLEM ~80% of AKI cases ... IMPROVEMENT If the urine ... Assess UA w/ microscopy ... for WBCs, RBCs, casts ... , crystals, protein
Hematuria Workup and Diagnosis Algorithm
 • Confirm hematuria → Urinalysis >3 RBCs/HPF, exclude mimics, repeat testing
mimics, repeat testing ... • Acute onset ... WBCs, or urine ... proteinuria, RBC casts ... if cause not identified
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
Causes of Proteinuria ... present on repeat testing ... including overnight testing ... sediment - WBC/RBC casts ... polyangiitis (GPA) / microscopic
Urinalysis & Urine Sodium 
Theophilus Protospatharius, a seventh-century physician who wrote the first manuscript focused exclusively
Microscopic exam ... • Crystals ... • Urinary casts ... Acute Kidney Injury ... #UNa #casts #glucosuria
Causes of Acute Kidney Injury (AKI) - Differential Diagnosis Algorithm
Acute Kidney Injury (AKI) - Acute increase
Causes of Acute ... Epithelial cell casts ... Obstruction • Cast ... myeloma) • Urate crystals ... polyangiitis /microscopic
Urine Microscopy - Urinary Sediment Examination Instructions
Preparation of the urine for microscopic examination:
 • Clean catch
Urine Microscopy ... Perform dipstick testing ... up by cells or casts ... Ill stain) and crystals ... protein matrix of casts