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Causes of Acute Kidney Injury - Differential Diagnosis Framework 
Pre-Renal
Post-Renal
Intrinsic Renal:
 • Tubules (ATN)
 • Glomerular:
Kidney Injury - Differential ... Diagnosis Framework ... : • Tubules (ATN ... KidneyInjury #Causes #Differential ... #Diagnosis #Algorithm
Intrinsic Renal Disease - Differential Diagnosis
Vascular:
 • Macrovascular: Renal artery occlusion, Fibromuscular disease
 • Microvascular: TTP/HUS,
Renal Disease - Differential ... Diagnosis Vascular ... Ischemia-induced: ATN ... Disease #nephrology #differential ... #diagnosis
Guide to Acute Kidney Injury (AKI)

What to ask/look for: 
 - HPI, PMH, full ROS
Liano 1996) - ATN ... CKD— 13% (mostly ATN ... AKI #Nephrology #Diagnosis ... Algorithm #Causes #Differential
Acute Kidney Injury (AKI) - Differential Diagnosis Framework
Pre-Renal:
 • Hypovolemia, Cardiorenal, Distributive Shock, HRS, Hypercalcemia, Renal
Injury (AKI) - Differential ... Diagnosis Framework ... C3/C4, Other • ATN ... Kidney #Injury #Differential ... #Diagnosis #nephrology
Hypomagnesemia - Differential Diagnosis
Renal Causes of Hypomagnesemia - Familial:
Bartter syndrome and Gitelman syndrome, Isolated recessive hypomagnesemia,
Hypomagnesemia - Differential ... Diagnosis Renal ... Diuretic phase of ATN ... Hypomagnesemia #differential ... #diagnosis #causes
Urine Specific Gravity - Interpretation
Specific Gravity = Density of urine / Density of water
SG close to
resistance to ADH) • ATN ... SG fixed at ~1.010 ... Interpretation #diagnosis ... #differential #
Acute Kidney Injury (AKI) - Differential Diagnosis Framework
Prerenal:
 • Due to true volume loss or decreased
Injury (AKI) - Differential ... Diagnosis Framework ... interstitium • ATN ... #Injury #AKI #Differential ... #Diagnosis #nephrology
Increased Urination - Differential Diagnosis Framework - Increased Volume / Frequency
 • Increased osmotic load (Increased
Increased Urination - Differential ... Diagnosis Framework ... Recovery phase of ATN ... Increased #Urination #Differential ... #Diagnosis #Urinary
Common causes of Acute Kidney Injury AKI - Differential Diagnosis
HEMODYNAMIC
 • Cardiac failure: Impaired forward flow,
Kidney Injury AKI - Differential ... Diagnosis HEMODYNAMIC ... Injury/Necrosis (ATN ... #KidneyInjury #Differential ... #Diagnosis #nephrology
Medications causing Acute Kidney Injury (AKI)
Prerenal:
 • Dehydration: Diuretics
 • Altered intrarenal autoregulation: ACEIs / ARBs,
Intrarenal: • ATN ... , tenofovir • AIN ... #pharmacology #differential ... #diagnosis