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A high-resolution 7.5- 10-MHz or higher linear array ultrasound transducer is used to perform an ocular
A high-resolution ... Emergency ocular ... hemorrhage, or retinal detachment ... #POCUS #ocular # ... retinal #detachment
Hyperkalemia Treatment Options
Stabilize cardiac membrane:
 • IV Calcium (peaks 5-10 minutes)
Decrease potassium concentration:
 • IV Fluids
Shift
• IV Fluids Shift ... peaks 1-2h) • Blood ... management #potassium #nephrology
Algorithm for patients with hypokalemia on the basis of the potassium-to-creatinine ratio in the urine
Urine K+
creatinine) • Cell shift ... mmol creatinine) High ... effective arterial blood ... Low-normal EABV, High ... algorithm #diagnosis #nephrology
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
Transcellular Shift ... • Normal or High ... Low PTH: - High ... Workup #phosphate #nephrology
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
phlebotomy High ... Crush injury • Blood ... Intracellular Shift ... Blood transfusion ... #nephrology
Hyperkalemia: Diagnostic algorithm
Decreased renal potassium excretion
 • Acute renal failure
 • Chronic renal failure
 • Drugs
Increased
Potassium-rich diet • Blood ... Normal, Renin High ... hypoplasia Aldosterone high ... Diagnosis #algorithm #nephrology
Hypophosphatemia - Differential Diagnosis Algorithm
Appropriately Low Kidney Phosphate Excretion:
 • Decreased GI Absorption: Chronic Diarrhea, Antacids,
Transcellular Shift ... Inappropriately High ... Diagnosis #Algorithm #nephrology
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
phlebotomy High ... Crush injury • Blood ... Intracellular Shift ... Blood transfusion ... #nephrology
Drugs associated with hypokalemia and hypomagnesemia

Hypokalemia
- Shift from extracellular fluid to intracellular fluid compartment
  -
Hypokalemia - Shift ... - Insulin (high ... differential #diagnosis #nephrology
Causes of HyperKalemia - Differential Diagnosis
Increased extracellular K+:
 • Tissue injury
 • Hemolysis
 • Rhabdomyolysis
 •
glycosides • High ... dietary intake • Blood ... blockers - MCW Nephrology