USMLE/COMLEX - Step 2 - Type 1 Diabetes Mellitus
Pathophysiology
Type 1 Diabetes Mellitus leads to an absolute insulin deficiency, causing hyperglycemia. In DKA, this leads to dehydration, electrolyte imbalances, and ketone production. The accumulation of ketones leads to acidosis and impaired cellular function. It can result in organ failure and death if left untreated.
Symptoms
Kussmaul breathing
Fruity-smelling breath
Confusion or decreased level of consciousness
Abdominal pain
Nausea and vomiting
Findings
Hypotension
Tachycardia
Hyperventilation
Altered mental status
Hyperglycemia
Acidosis
Electrolyte imbalances
Presence of ketones in urine or blood
Diagnosis
Blood glucose test
Arterial blood gas
Serum electrolyte test
Urinalysis
Serum ketones test
Complete blood count
Serum amylase and lipase test
Treatment
The treatment of DKA is complex and requires a multidisciplinary approach involving healthcare professionals. Early recognition and treatment of DKA are essential to prevent severe complications and improve outcomes. Management steps include:
1. Fluid replacement with intravenous fluids
2. Insulin therapy through an intravenous line
3. Electrolyte replacement and monitoring of potassium, sodium, and bicarbonate levels
4. Treatment of underlying infection or trigger
5. Continuous monitoring of vital signs, blood glucose, electrolyte levels, and acid-base balance
6. Correction of acidosis with bicarbonate if severe