49 results
Hyponatremia - Differential Diagnosis Algorithm
Hypovolemic - Give volume
Hypervolemic (Edematous) - Look for and treat underlying cause
treat underlying cause ... ADH Present and Active ... Stress, Nausea, ... Algorithm #diagnosis #nephrology ... #sodium
Causes of Hypokalemia - Differential Diagnosis Algorithm
Defining the cause of hypokalemia starts by measuring urinary K
Causes of Hypokalemia ... Defining the cause ... Pseudo-hyperaldosteronism: exogenous ... diagnosis #algorithm #causes ... #nephrology #potassium
Causes of Hypernatremia - Differential Diagnosis
Inadequate water intake:
 • Lack of access to water
Extrarenal hypotonic fluid
Causes of Hypernatremia ... Differential #Diagnosis #Causes ... #nephrology #sodium
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
• Azotemia • Exogenous ... Diagnosis #Algorithm #causes ... #nephrology
Inherited Defects in Kidney Tubule Epithelial Cells

Renal glucosuria - Na+-dependent glucose cotransporter
Cystinuria - Amino acid transporter
Bartter
cell epithelial sodium ... Pseudohypoaldosteronism - Decreased activity ... of epithelial sodium ... (V2) receptor activity ... Defects #Kidney #Nephrology
Secondary Causes of Hypertension - Differential Diagnosis Algorithm
Hypertension - BP > 140/90 (>130/80 for DM)
Hypertensive urgency
Secondary Causes ... Steroids (Cushing's, exogenous ... withdrawal Anatomic Causes ... RAS Metabolic Causes ... HTN #Secondary #Nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Causes of Hypernatremia ... water loss, Serum Sodium ... Hypernatremia #Nephrology ... Diagnosis #Algorithm #Causes
Hypokalemia Differential Diagnosis Algorithm
Hypertensive:
 • High Al, Low R - Primary aldosteronism
 • High Al, High
Pseudo-hyperaldosteronism: exogenous ... Diagnosis #Algorithm #nephrology ... #causes #low #potassium
Causes of Metabolic Alkalosis: Differential Diagnosis
ECF volume contracted: urine chloride concentration <20 meq/L
 • Gastric alkalosis:
Causes of Metabolic ... ectopic ACTH) • Exogenous ... dehydrogenase activity ... loop diuretics actively ... #nephrology
Visualizing Hypotonic Hyponatremia

 • UNa reveals RAAS activity.
 • UOsm reveals ADH activity.
 • ADH secretion
UNa reveals RAAS activity ... UOsm reveals ADH activity ... only when RAAS is active ... Hyponatremia #Graph #nephrology ... #diagnosis #sodium