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Type 1 Diabetes

DKA: What It Is, How to Avoid It, When It's an Emergency

· 3 min read · Reviewed by GlucIQ Clinical Review Workflow
#dka#sick-day-rules#cluster:dka

DKA — diabetic ketoacidosis — is the word that scares everyone with type 1. And it should: it’s the most dangerous acute emergency in the condition, and it can come on fast.

But here’s the part that matters: DKA is largely preventable. Understanding it isn’t scary — it’s empowering.

What DKA actually is

When your body has no insulin, it can’t use glucose for energy. So it switches to burning fat — and fat burning produces ketones (acidic chemicals). When ketones build up too fast, your blood becomes acidic. That’s DKA.

It’s not “a high blood sugar.” It’s a fuel-system failure with dangerous chemistry. Untreated, it’s a medical emergency.

The warning signs

DKA builds over hours to a day. The signs:

  • Very high glucose (usually over 250, sometimes much higher)
  • Ketones in your urine or blood (the key test)
  • Extreme thirst and peeing (more than usual)
  • Nausea, vomiting, stomach pain
  • Fast breathing, fruity-smelling breath
  • Confusion or drowsiness — this is the danger point

If you have vomiting + high glucose + ketones, that’s the emergency combination. Don’t wait.

How DKA starts (the common setups)

  1. Missed insulin. The most common cause — especially missed basal insulin. Skipping background insulin for even a day can start the slide.
  2. Illness. Fever, vomiting, flu — illness raises glucose and fluid needs, and if you can’t keep food or insulin down, DKA can follow fast.
  3. Pump failure. If your pump stops delivering and you don’t notice, you’re without insulin within hours.
  4. New diagnosis. Many people are first diagnosed with type 1 in DKA, because the disease was building unnoticed.

The sick-day rules that keep you safe

These are the rules every person with type 1 (and every parent) should know:

  • Never skip your long-acting insulin, even if you’re sick and eating nothing. Your basal keeps the fuel system from going off the rails.
  • Check ketones when sick or high. If glucose is high and you feel unwell, test for ketones. That’s the test that tells you whether this is “handle at home” or “call for help.”
  • Stay hydrated. Sickness + high glucose dehydrates fast. Drink water steadily.
  • Have a sick-day plan from your care team: how much insulin to take when ill, when to check ketones, and when to call.
  • If you have a pump, have a backup. Know your injection doses in case the pump fails.

When it’s an emergency

Call for emergency help if you have:

  • Vomiting that won’t stop (you can’t keep fluids or insulin down)
  • Confusion, drowsiness, or difficulty breathing
  • Ketones that keep rising despite your plan
  • Any doubt — when in doubt, call. This is not the moment to be brave or independent.

The one-minute takeaway

DKA is serious but mostly preventable. Never skip basal insulin, check ketones when sick or high, stay hydrated, and have a sick-day plan. The people who handle DKA best are the ones who saw it coming — and now you know what to watch for.

References

  • Wolfsdorf JI, et al. ISPAD Clinical Practice Consensus Guidelines 2018: Diabetic ketoacidosis and the hyperglycemic hyperosmolar state. Pediatr Diabetes. 2018. DOI: 10.1111/pedi.12701
  • Karges B, et al. Long-acting insulin analogs and the risk of diabetic ketoacidosis. Diabetes Care. 2017. DOI: 10.2337/dc17-0234