39 results
Acute Kidney Injury - Differential Diagnosis Framework
PRERENAL:
 - Intrarenal vasoconstriction-hemodynamically mediated
 - Systemic vasodilation
 - Volume
vasodilation - Volume ... urinalysis, labs - Management ... correct, underlying volume ... biopsy - Management ... ultrasonography - Manaqement
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Causes of Polyuria ... Nephrogenic DI (Renal ... without ↑ urine volume ... Differential #Diagnosis #Causes ... #nephrology
Hyponatremia - Differential Diagnosis Algorithm
ADH Independent:
 • Tea and Toast Syndrome, Beer Potomania - Low solute
Potomania - Low solute ... • Renal Failure ... Hypovolemic - GI losses, renal ... Diagnosis #Algorithm #causes ... #nephrology
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted - 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting,
Diagnosis Algorithm Volume ... Gitelman Syndrome Volume ... hyperaldosteronism • High PRA: Renal ... Diagnosis #Algorithm #Nephrology ... #Causes
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
• Water and solute ... Dl • Chronic Renal ... Failure Solute ... Diagnosis #Algorithm #causes ... #nephrology
Common causes of Acute Kidney Injury AKI - Differential Diagnosis
HEMODYNAMIC
 • Cardiac failure: Impaired forward flow,
Common causes of ... congestion • Volume ... thromboembolism, renal ... tumors INTRINSINC RENAL ... Differential #Diagnosis #nephrology
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
polydipsia, Low solute ... intake, Renal insufficiency ... differential #algorithm #causes ... #nephrology
Urinary Casts and Disease Associations
Hyaline - May be nonspecific; seen in normal individuals or during severe
Urinary Casts and ... intravascular volume ... tubulointerstitial nephritis, renal ... edgarvlermamd - Nephrology ... Microscopy #Diagnosis #Nephrology
Lactated Ringers (LR) vs Normal Saline (NS) - Comparison

Composition of LR:
 • Sodium 130 mEq/L
 •
Saline (NS) - Comparison ... shift • Saline Causes ... Decreased GFR, urine volume ... • Saline May Cause ... increases interstitial volume
Distal Renal Tubular Acidosis (RTA)  Type 1 

Totally scuppers the kidney's acidification mechanism. Will be
Distal Renal Tubular ... Distal #Diagnosis #Management ... #Nephrology #Causes