46 results
Normal Anion-Gap Acidosis (NAGMA) - Differential Diagnosis Framework and Workup

NAGMA
- Chem, ABG or VBG
- Calculate Anion
- RenalUrine ... Renal Loss of HCO3 ... • Serum K low ... Proximal RTA: • Low ... • Serum K: low
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Na <20: Extra-renal ... Na >30: Renal losses ... Hypothyroidism, Low ... Na > 30: Renal ... diagnosis #sodium #low
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Osmolarity 2) Urine ... Osmolarity 3) Urine ... Uric Acid - Low ... High Uric Acid → renal ... nephrology #sodium #low
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting, NGT
hyperaldosteronism • Low ... Urine Cl-: Vomiting ... , NGT suction, Low ... (late) • High Urine ... hyperaldosteronism • High PRA: Renal
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted - 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting,
hyperaldosteronism • Low ... Urine Cl-: Vomiting ... , NGT suction, Low ... (late) • High Urine ... hyperaldosteronism • High PRA: Renal
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
of magnesium = (urine ... serum magnesium x urine ... cells FEMg >4% = renal ... magnesium loss if renal ... nephrology #magnesium #low
Types of Renal Calculi

Calcium oxalate
 - Interstitial apatite plaque, Low urine volume, Increased urinary calcium excretion,
apatite plaque, Low ... urine volume, Increased ... collecting duct plaque, Low ... urine volume, Increased ... and intestine, Low
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
volume-based algorithm Urine ... ≥100): SIADH, Renal ... can be high or low ... Primary polydipsia), Low ... differential #diagnosis #table
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
2-2.5% or 24h Urine ... Malabsorption RENAL ... 2-2.5% or 24h Urine ... Hypomagnesemia #Magnesium #Low
Pulmonary Renal Syndromes - OnePager Summary
Autoimmune ANCA vasculitis (AAV): GPA (granulomatous with polyangiitis), EGPA (eosinophilic granulomatosis
Pulmonary Renal ... Anti-GBM antibody • Urine ... : UA, Urine protein ... non-specific, ESR usually low ... hematuria, RBC casts, low