13 results
Hypophosphatemia - Differential Diagnosis Algorithm

Transcellular Shift
 • Recovery From DKA
 • Refeeding Syndrome
 • Acute Respiratory
• Refeeding Syndrome ... • Acute Respiratory ... Hypokalemia • Hypomagnesemia ... • Small bowel diarrhea ... endocrinology #causes
Causes of Hypocalcemia - Differential Diagnosis Algorithm
 • Extravascular: Pancreatitis, surgery, acute phosphate intake and renal
Causes of Hypocalcemia ... Pancreatitis, surgery, acute ... , Low PTH: Hypoparathyroidism ... contrast agents • Hypomagnesemia ... #Causes #algorithm
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
Workup for Hypophosphatemia ... paraproteinemia, acute ... Malabsorption, Chronic diarrhea ... • Normal or Low ... - Normal or Low
Hypophosphatemia - Differential Diagnosis Algorithm
Appropriately Low Kidney Phosphate Excretion:
 • Decreased GI Absorption: Chronic Diarrhea, Antacids,
Hypophosphatemia ... Appropriately Low ... Absorption: Chronic Diarrhea ... , Acute Respiratory ... nephrology #phosphorus #workup
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
Hypomagnesemia - ... losses - Chronic diarrhea ... Differential #Diagnosis #Low ... Classification #Causes ... #Workup #hypomg
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
Causes of Hypomagnesemia ... Differential Diagnosis Algorithm ... Urine Mg < 10g • Diarrhea ... • Gitelman's syndrome ... #Magnesium #Low
Causes of Hypomagnesemia
 • Redistribution: IV glucose, Correction of diabetic ketoacidosis, IV hyperalimentation, Refeeding after starvation,
Causes of Hypomagnesemia ... after starvation, Acute ... biliary fistula, Diarrhea ... depletion, Familial hypophosphatemia ... nephrology #magnesium #low
Causes of Hypomagnesemia
Redistribution:
 - IV glucose
 - Correction of diabetic ketoacidosis
 - IV hyperalimentation
 - Refeeding
Causes of Hypomagnesemia ... starvation - Acute ... biliary fistula - Diarrhea ... depletion - Familial hypophosphatemia ... #Causes #diagnosis
Hypocalcemia Workup - Differential Diagnosis Algorithm
 • Low Magnesium, High Magnesium - Functional Hypoparathyroidism
 • High
Hypocalcemia Workup ... Differential Diagnosis Algorithm ... Extravascular deposition: Hyperphosphatemia ... , Acute Pancreatitis ... metastases, Hungry bone syndrome
Algorithm for the Evaluation of Chronic Diarrhea (< 7 days)
Exclude:
1. Causes of acute diarrhea
2. Lactose intolerance
3.
Algorithm for the ... Causes of acute ... Irritable bowel syndrome ... #management #algorithm ... #workup #diagnosis