Quick answer
How should I present a diabetic ketoacidosis case on rounds?
Open with his age, known type 1 diabetes, and the precipitant: missed insulin during an illness. Give the discriminating history—Kussmaul breathing, fruity breath, and dizziness on standing—then his vitals and exact pH, bicarbonate, anion gap, and ketone values before naming diabetic ketoacidosis as your leading diagnosis. Finish with the fluid and insulin plan, the potassium safety check, and what still needs measuring, such as his weight.
Before you speak
Define the moment and the information you actually have
An emergency-department presentation after the stat diabetic ketoacidosis labs are back.
A supervising resident or attending who needs a prioritized new-patient presentation.
History, medications, and social history, plus vital signs and venous blood gas, bicarbonate, anion gap, beta-hydroxybutyrate, glucose, and potassium. Body weight, allergies, and a formal mental-status exam are not supplied.
About 90 seconds
Fictional training case: The presentation is locked to the simulated patient JSON. It names important unknowns instead of inventing an examination, vital signs, allergies, or tests.
Complete spoken example
First, read it once without stopping
The paragraph breaks show the clinical shape. In a real presentation, pause briefly between ideas rather than announcing the headings.
Mr. Adams is a 24-year-old man with type 1 diabetes since age 14 who presents with 12 hours of nausea, vomiting, abdominal pain, and rapid, deep breathing after missing insulin doses during a stomach illness.
His breathing is deep and rapid with a fruity, acetone odor, and his fingerstick glucose at home read above the meter's high range. He first thought this was just his stomach bug getting worse, but he is now concerned because he feels confused and dizzy when he stands.
He was diagnosed with type 1 diabetes 10 years ago and normally takes insulin glargine 24 units at bedtime with a lispro sliding scale, but he recently missed several doses because he felt too unwell to manage his regimen. He is a college student who drinks alcohol only occasionally.
On arrival his heart rate was 122, blood pressure 94 over 60, respiratory rate 28 with Kussmaul breathing, and temperature 37 degrees Celsius. His venous blood gas showed a pH of 7.12 with a bicarbonate of 8 milliequivalents per liter and an anion gap of 26. Beta-hydroxybutyrate was markedly elevated at 6.8 millimoles per liter, glucose was 540 milligrams per deciliter, and potassium was 5.2, on the high side.
My leading diagnosis is severe diabetic ketoacidosis, precipitated by missed insulin during an intercurrent illness. Simple gastroenteritis would not explain this degree of acidosis and ketosis, and hyperosmolar hyperglycemic state is less likely given the significant ketoacidosis rather than a purely hyperosmolar picture.
I would start aggressive IV normal saline resuscitation and a continuous IV insulin infusion at 0.1 units per kilogram per hour, while monitoring potassium closely and adding potassium chloride once it falls below 5.0 milliequivalents per liter. I would recheck a basic metabolic panel and blood gas every two hours and would confirm potassium is safe before relying on the infusion alone, since insulin drives potassium into cells and can precipitate dangerous hypokalemia.
Build the presentation
Give every sentence one job
A presentation is a compressed clinical argument, not a chart read aloud. These six moves keep the facts connected to your reasoning.
Opening one-liner
Name the patient, the substrate, and the acute precipitant
“Mr. Adams is a 24-year-old man with type 1 diabetes since age 14 who presents with 12 hours of nausea, vomiting, abdominal pain, and rapid, deep breathing after missing insulin doses during a stomach illness.”
Why it belongs: Naming the known diabetes and the missed-insulin precipitant in the first sentence tells the listener exactly why this is urgent before any lab value is given.
This is a known diabetic who's been vomiting and breathing fast.
Mr. Adams is a 24-year-old man with type 1 diabetes who presents with 12 hours of vomiting and rapid, deep breathing after missing insulin doses.
Why: A person-first noun and a stated precipitant orient the listener faster than a vague summary.
History of present illness
Give the features that distinguish ketoacidosis from simple gastroenteritis
“His breathing is deep and rapid with a fruity, acetone odor, and his fingerstick glucose at home read above the meter's high range. He first thought this was just his stomach bug getting worse, but he is now concerned because he feels confused and dizzy when he stands.”
Why it belongs: Kussmaul breathing, acetone breath, and orthostatic symptoms are discriminating features, and the standing dizziness signals clinically important volume depletion that changes urgency.
He has fruity breath and feels a bit dizzy sometimes.
His breath has a fruity, acetone odor, and he feels confused and dizzy when he stands, suggesting significant volume depletion.
Why: Naming the specific finding and connecting it to volume status is more clinically useful than a vague description.
Relevant background
Summarize his regimen and confirm the precipitant
“He was diagnosed with type 1 diabetes 10 years ago and normally takes insulin glargine 24 units at bedtime with a lispro sliding scale, but he recently missed several doses because he felt too unwell to manage his regimen. He is a college student who drinks alcohol only occasionally.”
Why it belongs: The missed insulin during an intercurrent illness is the precipitant that ties the history to the diagnosis, and ruling out heavy alcohol use excludes a competing cause of ketosis.
He's a type 1 diabetic who ran out of insulin.
He has had type 1 diabetes for 10 years and has missed several doses of his usual insulin regimen over the past two days.
Why: Person-first language and the specific regimen and duration matter more than a single vague cause.
Objective data
State the vitals and the acid-base and ketone evidence
“On arrival his heart rate was 122, blood pressure 94 over 60, respiratory rate 28 with Kussmaul breathing, and temperature 37 degrees Celsius. His venous blood gas showed a pH of 7.12 with a bicarbonate of 8 milliequivalents per liter and an anion gap of 26. Beta-hydroxybutyrate was markedly elevated at 6.8 millimoles per liter, glucose was 540 milligrams per deciliter, and potassium was 5.2, on the high side.”
Why it belongs: The combination of tachycardia, severe metabolic acidosis, a wide anion gap, and markedly elevated ketones confirms ketoacidosis rather than simple hyperglycemia, and the potassium value determines whether insulin can begin safely.
His labs show DKA.
His venous pH is 7.12 with a bicarbonate of 8 and an anion gap of 26, and his beta-hydroxybutyrate is 6.8 millimoles per liter.
Why: Exact values let the listener judge severity instead of accepting an unqualified label.
Assessment
Commit to the leading diagnosis and rank the alternatives
“My leading diagnosis is severe diabetic ketoacidosis, precipitated by missed insulin during an intercurrent illness. Simple gastroenteritis would not explain this degree of acidosis and ketosis, and hyperosmolar hyperglycemic state is less likely given the significant ketoacidosis rather than a purely hyperosmolar picture.”
Why it belongs: The assessment commits to a diagnosis, states the evidence, and explains why the two most tempting alternatives fit the data less well.
This looks like DKA, could also be a stomach bug or HHS.
My leading diagnosis is severe diabetic ketoacidosis; the acidosis and ketosis are too significant for gastroenteritis alone or for a purely hyperosmolar picture.
Why: The preferred version ranks the diagnosis and ties it to specific evidence rather than listing options without reasoning.
Plan
Sequence fluids, insulin, and the potassium safety check
“I would start aggressive IV normal saline resuscitation and a continuous IV insulin infusion at 0.1 units per kilogram per hour, while monitoring potassium closely and adding potassium chloride once it falls below 5.0 milliequivalents per liter. I would recheck a basic metabolic panel and blood gas every two hours and would confirm potassium is safe before relying on the infusion alone, since insulin drives potassium into cells and can precipitate dangerous hypokalemia.”
Why it belongs: Fluid and insulin therapy are the core treatment, but sequencing potassium replacement correctly prevents a dangerous drop in serum potassium during treatment, and serial testing tracks the response.
I'll start fluids and insulin and treat the DKA.
I would start IV fluids and a weight-based insulin infusion while checking that potassium is safe, then recheck labs every two hours.
Why: Naming the sequence and the safety check is more useful than a generic treatment statement.
Do not fill the blanks
Say what has not yet been established
Real presentations often happen before the chart is complete. A brief, explicit limitation is safer and more credible than a polished invention.
Exact body weight
Say: “His exact body weight is not given in this simulation, so the precise insulin infusion rate still needs a measured or estimated weight.”
Weight-based dosing should not be guessed from age or build.
Allergies and renal function
Say: “Allergies and renal function are not documented, and both affect fluid choice and monitoring.”
Fluid and electrolyte management cannot be finalized without them.
Clinical compression
What leads, what stays, and what can wait?
| Source detail | Decision | Reason |
|---|---|---|
| 12 hours of nausea, vomiting, abdominal pain, and Kussmaul breathing | Lead | These are the acute, discriminating features that define the presentation and its urgency. |
| Missed insulin doses during a gastroenteritis illness | Include | This precipitant explains why ketoacidosis developed now. |
| College student, non-smoker, occasional alcohol | Compress | Brief social context, useful mainly to exclude alcohol as a competing cause, but it does not change the metabolic management. |
| Confusion and dizziness on standing | Lead | This red flag signals significant dehydration and acidosis requiring urgent fluid resuscitation. |
| Insulin regimen of glargine and a lispro sliding scale | Include | It shows his baseline requirement and confirms the precipitant was a lapse in his usual regimen, not a new diagnosis. |
After the presentation
Likely attending questions
Answer the question first, then give the evidence. If the source case does not contain the answer, say what you would verify.
Why not just start the insulin infusion immediately?
Insulin drives potassium into cells and can cause a dangerous drop in serum potassium, risking arrhythmia. His potassium is 5.2 now, but I would confirm it is not falling below 5.0 before relying on the infusion alone, and would add potassium replacement once it does.
How do you distinguish this from hyperosmolar hyperglycemic state?
His presentation is dominated by a wide anion gap, low bicarbonate, and markedly elevated beta-hydroxybutyrate, pointing to significant ketoacidosis rather than the milder ketosis and higher glucose more typical of HHS. Confirming this needs the full metabolic picture, not glucose alone.
What haven't you assessed yet?
His exact weight, allergies, and renal function are not documented in this simulation, and I would obtain them before finalizing fluid and dosing decisions.
Self-check
A 30-second check before you present
- State the duration, breathing pattern, and precipitant in the opening sentence.
- Report vitals alongside the exact pH, bicarbonate, anion gap, and ketone values.
- Name the leading diagnosis and support it with acid-base and ketone data, not glucose alone.
- Mention the patient's usual insulin regimen and what changed.
- State the potassium value and how it changes insulin timing.
- Do not claim body weight or allergy status without confirming them.
- Give the fluid and insulin plan with the potassium safety check named explicitly.
- State the recheck interval for labs.
Common presentation problems
Repair the habits that make a case hard to follow
Saying only that the patient 'has DKA' without giving the acid-base and ketone evidence
Repair: State pH, bicarbonate, anion gap, and beta-hydroxybutyrate so the listener can judge severity.
Implying the insulin infusion can run unconditionally once started
Repair: State that potassium is checked and replaced below 5.0 milliequivalents per liter, since insulin can drop it further.
Calling this 'just gastroenteritis' because vomiting is prominent
Repair: State why the degree of acidosis and ketosis is inconsistent with gastroenteritis alone.
Skipping body weight when insulin dosing is weight-based
Repair: Say that exact weight is still needed for a precise infusion rate.
Frequently asked questions
Oral case presentation questions
How much detail on the insulin regimen should I give?
Give the regimen and what changed only if it affects the assessment, as it does here by identifying the precipitant; otherwise a brief mention is enough.
Should I name hyperosmolar hyperglycemic state as a differential?
Yes, briefly, since it is a related and important alternative, but the ketoacidosis findings here make DKA the stronger fit, and you should say why.
How long should this presentation be?
This worked example targets about 90 seconds. Adjust length to acuity, learner level, and local expectations, without omitting the potassium value.
Practice out loud
Turn the patient encounter into your own presentation
Bedside English lets you interview an AI patient, then practice presenting the collected case to an AI attending and respond to follow-up questions.
Editorial record
Sources, provenance, and review boundary
The patient facts come from simulated case endo_001. Clinical framing and presentation design were checked against the sources below. This page teaches clinical communication and reasoning; it is not medical advice or a local protocol.
- American Diabetes Association Standards of Care in Diabetes 2026American Diabetes Association · accessed 2026-09-03
- Feedback on Oral Presentations during RoundsStanford Medicine · accessed 2026-09-03
- Clinical Teaching Tools: OMP and SNAPPSUCSF Medical Education · accessed 2026-09-03
Published: · Last source, safety, and language review: