Hyponatremia: Step-by-Step Approach (Flowchart)
The USMLE Adviser Hyponatremia flowchart turns this presentation into a short series of yes/no decisions, the way Step 2 CK and Step 3 vignettes test it. Here is how it begins.
How the flowchart starts
The flowchart opens with one question: is serum osmolality low? If not, the answer is pseudo- or hypertonic hyponatremia. If it is low, the next branch asks whether the patient is volume depleted, and the chart continues from there.

FAQs
How does the hyponatremia flowchart start?
The flowchart opens with one question: is serum osmolality low? If not, the answer is pseudo- or hypertonic hyponatremia. If it is low, the next branch asks whether the patient is volume depleted, and the chart continues from there.
Where can I see the full hyponatremia flowchart?
The complete flowchart is page 74 of the USMLE Adviser e-book, Clinical Algorithms: Volumes 1 & 2, which has 232 flowcharts across 19 specialties.
Related flowcharts
Get the full flowchart
The USMLE Adviser e-book has 232 one-page clinical flowcharts across 19 specialties for Step 2 CK, Step 3 and the Match. Instant digital download.
From Clinical Algorithms: Volumes 1 & 2 by Dr. Adnan Memon, MD (page 74). Reviewed by the USMLE Adviser Team. For exam preparation only, not medical advice.
USMLE Adviser