79 results
Urine Microscopy - Casts
Acellular Casts
 • Hyaline Casts - Consists of only precipitated Tamm-Horsfell protein without
Urine Microscopy ... - Casts Acellular ... Casts • Hyaline ... #Urine #Microscopy ... interpretation #diagnosis
Atlas of Urine Microscopy Findings
 • Epithelial cells - Normal
 • Renal tubular cells - Acute
Atlas of Urine Microscopy ... also be seen if urine ... - Diagnostic of ... contamination #Urine ... Microscopy #Atlas #key #diagnosis
Glomerular Diseases - Nephritic and Nephrotic Syndromes

Nephritic syndrome—due to GBM disruption. 
Hypertension. t BUN and creatinine.
RBC casts in urine ... but in severe cases ... Proteinuria #Nephrology #Diagnosis
Nephritic vs Nephrotic Syndrome

Step 1: If the patient has hematuria and/or proteinuria, think about nephrotic/nephritic syndromes.
Step
hematuria (RBC casts ... dysmorphic RBCs in urine ... Algorithm #Nephrology #Diagnosis
Hematuria Workup and Diagnosis Algorithm
 • Confirm hematuria → Urinalysis >3 RBCs/HPF, exclude mimics, repeat testing
Hematuria Workup and Diagnosis ... WBCs, or urine ... → Urine culture ... proteinuria, RBC casts ... uw_IMresidency #Hematuria #Diagnosis
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
- Differential Diagnosis ... Proteinuria (Negative urine ... Proteinuria (Positive urine ... sediment - WBC/RBC casts ... #Differential #Diagnosis
Urinary Casts and Disease Associations
Hyaline - May be nonspecific; seen in normal individuals or during severe
Urinary Casts and ... and concentrated urine ... breakdown of cellular casts ... heme-granular casts ... Differential #Microscopy #Diagnosis
Urine Microscopy Instructions
1) Spin fresh urine sample (10-15mL) in a centrifuge for 3-5 minutes - Don't
Urine Microscopy ... 1) Spin fresh urine ... under lower power (casts ... iMedEducation #Urine ... Instructions #nephrology #diagnosis
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
False Positives on Urine ... levofloxacin, ofloxacin, poppy ... seeds, poppy oil ... FalsePositives #Urine ... Testing #Laboratory #diagnosis
Hematuria - Differential Diagnosis Framework

Gross Hematuria: Red/Dark urine
 • 1ml blood/liter urine can induce color change
- Differential Diagnosis ... 1ml blood/liter urine ... hematuria: - RBC casts ... → Diagnostic of ... #Differential #Diagnosis