Emergency & Acute Care

Diabetic Ketoacidosis — Clinical Reference

Last reviewed 2026-06-16 · TruelyserMD Clinical Reference
For Patients & General Readers

Diabetic Ketoacidosis (DKA) is a serious complication of diabetes where the body doesn't have enough insulin. This causes the body to break down fat for energy, leading to a buildup of ketones in the blood, making it acidic. DKA can happen to anyone with diabetes, especially if they miss insulin doses or get sick, and it requires immediate medical attention.

Clinical Overview

Diabetic Ketoacidosis (DKA) is a life-threatening metabolic derangement characterized by hyperglycemia, ketosis, and metabolic acidosis. It typically occurs in type 1 diabetes but can also be seen in type 2 diabetes, often precipitated by infection, non-adherence to insulin therapy, or new-onset diabetes.

Clinical Presentation

Signs & Symptoms

Symptoms (Patient-Reported)

  • Extreme thirst (polydipsia)
  • Frequent urination (polyuria)
  • Nausea and vomiting
  • Abdominal pain
  • Fruity-smelling breath
  • Fatigue and weakness
  • Shortness of breath

Signs (Clinician-Observed)

  • Tachypnea with Kussmaul pattern
  • Dehydration (dry mucous membranes, decreased skin turgor)
  • Tachycardia
  • Hypotension
  • Fruity odor on breath

Differential Diagnoses

ConditionDistinguishing Feature
Hyperosmolar Hyperglycemic State (HHS)HHS typically presents with more profound hyperglycemia and dehydration but minimal or absent ketosis and acidosis.
Lactic AcidosisLactic acidosis is characterized by elevated lactate levels and can occur in the absence of significant hyperglycemia or ketosis, often due to hypoperfusion or certain medications.
Alcoholic KetoacidosisOccurs in chronic alcohol users, often after a binge followed by poor oral intake and vomiting, with normal or low glucose levels and ketosis.
Starvation KetoacidosisDevelops with prolonged fasting or severe caloric restriction, leading to ketosis but usually without significant hyperglycemia or profound acidosis.
Diabetic Ketosis (without acidosis)Ketones are present, but the bicarbonate level is adequate, and there is no significant metabolic acidosis.
UremiaCan cause metabolic acidosis and altered mental status, but typically associated with renal failure and absent hyperglycemia/ketosis.

Red Flags — Seek Immediate Care

Key Investigations

Management Overview

Management of DKA involves aggressive fluid resuscitation to correct dehydration, intravenous insulin therapy to suppress ketogenesis and lower glucose, and electrolyte replacement, particularly potassium, to prevent arrhythmias. Close monitoring of glucose, electrolytes, and acid-base status is crucial throughout treatment.

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment. TruelyserMD does not replace clinical judgement.