56 results
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 ... #calculation #diagnosis
Guide to Acute Kidney Injury (AKI)

What to ask/look for: 
 - HPI, PMH, full ROS
AKI) What to ask ... UOP/weights - Urine ... Liano 1996) - ATN ... CKD— 13% (mostly ATN ... AKI #Nephrology #Diagnosis
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 ... EricsMedicalLectures/ #Urine ... Interpretation #diagnosis
Purple Urine Bag Syndrome
Chronic, indwelling catheter + bacteriuria (Providencia, Klebsiella, E.coli*) + alkaline urine
Tryptophan → Indoxyl
Purple Urine Bag ... E.coli*) + alkaline urine ... BrighamChiefs #Purple #Urine ... Syndrome #PUBS #pathophysiology ... #differential #diagnosis
Jaundice - Pathophysiology and Causes

- Amy Chung, MD, MSc @AmyChung 

#Jaundice #Pathophysiology #Differential #Unconjugated #Causes #Diagnosis
Jaundice - Pathophysiology ... Amy Chung, MD, MSc ... #Jaundice #Pathophysiology ... Unconjugated #Causes #Diagnosis
Increased Urination - Differential Diagnosis Framework - Increased Volume / Frequency
 • Increased osmotic load (Increased
- Differential Diagnosis ... load (Increased urine ... (usually low urine ... Recovery phase of ATN ... #Differential #Diagnosis
Cerebral Salt Wasting vs SIADH - Pathophysiology 
1) Neurological event
2) Sodium loss from tubules
3) Naturiesis →
Wasting vs SIADH - Pathophysiology ... → Increased urine ... SaltWasting #SIADH #Pathophysiology ... #diagnosis #nephrology
Cushing Syndrome Testing Algorithm
INDICATIONS FOR TESTING:
 • Suspected Cushing syndrome (central obesity, muscle weakness, refractory hypertension)
Testing:
Cortisol, Free Urine ... Serum (or Cortisol Urine ... Free by LC-MS/MS ... Cushing #Syndrome #diagnosis
Urine Microscopy - Casts
Acellular Casts
 • Hyaline Casts - Consists of only precipitated Tamm-Horsfell protein without
Urine Microscopy ... tubular necrosis (ATN ... EricsMedicalLectures/ #Casts #Urine ... interpretation #diagnosis
Rhabdomyolysis - Differential Diagnosis and Management Summary

Trauma:
 • Immobilization, Crush iniury, Compartment syndrome, Electrical injury
Exertional:
 •
- Differential Diagnosis ... Dermatomyositis) AKI - Pathophysiology ... hour with goal urine ... hyperkalemia or ATN ... #Differential #Diagnosis