New-Onset Diabetes at 4:30 on a Friday: Ketones, but Is It DKA?

Apply the criteria explicitly. Pediatric DKA requires hyperglycemia (>200 mg/dL), ketosis, and acidosis defined as pH <7.30 or bicarbonate <18 mEq/L. Owen has:

• Glucose 412 - meets the glycemic criterion.
• Large urine ketones - meets the ketosis criterion.
• pH 7.31 and bicarbonate 19 - he is on the acidotic side of normal but does not meet the acidosis threshold.

So this is new-onset type 1 diabetes with ketosis, not DKA - but with a pH of 7.31 he is one small push (vomiting, poor intake, a longer car ride) away from it. Large ketones with a bicarbonate of 19 is a patient who can decompensate over hours, not days.

Rule out the tempting alternative: the recent prednisolone course invites a "steroid hyperglycemia" explanation. An A1c of 11.8% corresponds to months of hyperglycemia and is incompatible with a 5-day steroid effect. The 5-week history of polyuria and 1.9 kg weight loss (about 8%) seals it. Steroids may have unmasked or worsened it, but they did not cause it.

Disposition: same-day emergency department, then pediatric endocrinology - not home, not Monday. A well-appearing child with new-onset T1D, large ketones, and mild dehydration needs lab-confirmed chemistry, an insulin start with education, and someone watching for the transition into acidosis. "Looks fine in the office" is exactly the population that deteriorates overnight. Mild dehydration of roughly 5% with normal potassium and creatinine means no fluid bolus is needed before transfer.

1. Progression to DKA - and cerebral edema. The patient at highest risk for cerebral edema is the young, newly diagnosed child treated with rapid fluid and insulin. This is a reason to move him to a facility that treats pediatric DKA routinely, not to a general ED that will improvise.

2. Hypokalemia. Potassium of 4.6 looks reassuring; it is not. Total body potassium is depleted in new-onset diabetes, and starting insulin drives potassium intracellularly - the serum value will fall. Insulin must not be given before the receiving team confirms potassium and has replacement available. Do not start insulin in the office.

3. Hypoglycemia during transport. A subcutaneous dose of rapid-acting insulin given in the office, with no glucose monitoring for 25 minutes on the road, creates a preventable risk. The only defensible version of this is a shared decision with the endocrinologist that insulin is needed before arrival and that transport can monitor glucose. Otherwise, hold.

4. Delay. Every phone call, form, and chart note adds time. Start the transfer process in parallel with the calls.

Concrete transfer steps:

• Call the pediatric ED and give a structured handoff (age, weight, glucose, pH, bicarbonate, potassium, ketones, mental status, estimated dehydration).
• Page the endocrinologist simultaneously; ask specifically whether to give any insulin before departure and what the ED should have ready.
• Send a written copy of the labs and urine results; do not rely on the family to relay numbers.
• Document the time of each call and the clinical reasoning for holding insulin. That record is both good care and good protection.

To the family, in this order:

1. Name it plainly: "Owen has type 1 diabetes. His body has stopped making insulin, and that is why he has been so thirsty and losing weight. This is not caused by anything you did, and it is not the steroids."
2. Explain the plan as a sequence, not a lecture: "He needs to be in the hospital tonight for IV fluids and to start insulin safely. He is not in the most severe stage, which is good - but he can get there quickly, so we are not sending him home."
3. Give a destination and a timeframe so the waiting feels purposeful.
4. Set expectations for the admission: 1–3 days, injections or a pump, a diabetes educator, and the fact that they will go home able to do this.

In the office while waiting:

• NPO except sips for thirst - oral intake with large ketones risks vomiting and aspiration if he needs sedation or becomes acidotic.
• Vital signs and a point-of-care glucose every 30 minutes; a neuro check with each set. A falling level of consciousness or new headache is an emergency, not a transport delay.
• Do not give bicarbonate, do not give a fluid bolus, do not give insulin without endocrinology agreement.
• Weigh him and record it - insulin dosing and fluid calculations at the receiving facility depend on an accurate weight.
• Confirm which parent is accompanying him and how the other will be reached; ask about transport (private car with an adult is acceptable for a stable child if the receiving team agrees; ambulance if mental status changes).
• Prepare the handoff copy of all labs, and send the family with the printed results.

Anticipatory guidance to give now, briefly: once home, they will need a sick-day plan, glucose and ketone testing supplies, glucagon, and a plan for the school nurse and the asthma provider - the steroid-asthma interaction will need to be discussed at every future flare.