When Ketoacidosis Is More Complex Than It Appears: A Case of Overlapping Causes

A middle-aged woman with Type 1 diabetes came to the hospital with vomiting and very little food intake. Blood tests revealed she had high anion gap metabolic acidosis—meaning dangerous acids were building up in her blood. Her ketone levels were severely elevated at 4.8 mmol/L, her blood sugar was dangerously low at 3.3 mmol/L, and her kidney function had deteriorated sharply.

At first, doctors treated her for diabetic ketoacidosis (DKA) using a standard insulin infusion protocol. However, after initial treatment, her condition did not improve over the first hours. This lack of response prompted the medical team to step back and reconsider what was really happening.

When a single diagnosis doesn't explain a patient's response to treatment, it often means multiple problems are occurring at the same time. In this case, the team realized that beyond diabetic ketoacidosis, the patient also had starvation ketosis (ketones produced from the body breaking down fat due to lack of food intake), severe acute kidney injury, and metabolic changes from kidney damage itself.

Each of these conditions contributed to the acidosis in different ways. Treating only the diabetes-related aspect missed the other drivers of her illness, which is why she wasn't getting better with insulin alone.

Once the medical team identified all the overlapping causes, they adjusted treatment to address each one. Within 48 hours of starting targeted therapy, the patient showed remarkable improvement in both her clinical symptoms and blood test results. She recovered fully and was discharged after 10 days in the hospital.

This dramatic turnaround underscores how important it is to dig deeper when initial treatment doesn't work as expected.

Ketoacidosis is the most common cause of high anion gap metabolic acidosis seen in acute medical settings. While the condition itself is straightforward to detect with blood tests, figuring out why it happened can be much harder—especially in people with diabetes, where multiple processes may be unfolding simultaneously.

This case is a reminder that doctors and care teams need to stay alert for signs that the obvious diagnosis isn't the whole story. When a patient doesn't respond to standard treatment, it's worth considering whether additional causes need to be identified and addressed. A coordinated approach from different specialists—a multidisciplinary team—can help catch what might otherwise be missed.

Source: Acta medica academica. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.