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Classification, Differential Diagnosis, and Features of Hyponatremia According to Volume Status 

Hypervolemic hypernatremia 
 - CHF
syndrome - Acute ... and chronic kidney ... deficit - Salt-losing ... Vomiting - Diarrhea ... #Diagnosis #Table
Algorithm for the Evaluation of Chronic Diarrhea (< 7 days)
Exclude:
1. Causes of acute diarrhea
2. Lactose intolerance
3.
Evaluation of Chronic ... Causes of acute ... 1000 g/24 h) #Chronic ... #Diarrhea #management ... workup #diagnosis #differential
Causes of Hyponatremia - Differential Diagnosis Algorithm
Hypovolemia, UNa > 20: 
 • Renal losses, Diuretic excess,
Hyponatremia - Differential ... deficiency, Salt-losing ... losses, Vomiting, Diarrhea ... UNa > 20: • Acute ... or chronic renal
Muscarinic Receptor Agonists and Antagonists 
Muscarinic Receptor Agonists
Methacholine
 • Diagnosis of bronchial airway
Carbachol
 • Glaucorna (topical
Receptor Agonists and Antagonists ... Muscarinic Receptor Antagonists ... Atropine • Acute ... hyoscyamine • Diarrhea-predominant ... #Pharmacology #Table
Causes of Acute Infectious Diarrhea
Noninflammatory Diarrhea
Viral - Noroviruses, astrovirus, adenovirus, Rotavirus, sapovirus
Protozoal - Giardia lamblia, Cryptosporidium,
Causes of Acute ... Infectious Diarrhea ... #Causes #Acute ... #Infectious #differential ... #diagnosis #table
Causes of Cough and Hemoptysis
Acute Inflammation 
 - Laryngitis 
 - Tracheobronchitis 
 - Mycoplasma and
and Hemoptysis Acute ... Bacterial Pneumonias Chronic ... Postnasal Drip - Chronic ... Cough #Hemoptysis #Differential ... #Causes #Table
Diuretics and Agents Regulating Renal Excretion

Carbonic Anhydrase Inhibitors (Acetazolamide, Dichlorphenamide)
 • Glaucoma
 • Epilepsy
 • Altitude
irrigation • Management ... Torsemide) • Acute ... (Aldosterone Antagonists ... hyperaldosteronism • Acute ... #Medications #Table
Causes of High-anion Gap and Non-anion Gap Metabolic Acidosis
Causes of High-anion Gap Acidosis:
 • Lactic acidosis
Renal failure (acute ... and chronic) Causes ... Diarrhea B. ... Chronic progressive ... Metabolic #Acidosis #differential
Low Back Pain (Lumbago) - Common Differential Diagnosis and Patterns

Mechanical Low Back Pain:
Aching pain in the
Lumbago) - Common Differential ... Usually acute (< ... coughing, straining during ... Chronic Back Stiffness ... BackPain #Lumbago #Differential
Causes of Hypokalemia
Transcellular Shifts:
 - Alkalosis, Increased plasma insulin (treatment of diabetic ketoacidosis), ß-Adrenergic agonists, Hypokalemic
nasogastric suction, Diarrhea ... - Diuretics (carbonic ... Hypomagnesemia, Acute ... Hypokalemia #Causes #differential