Emergency Protocols & Sick Day Management

Because your child’s body cannot properly process ketones for energy, a common illness can quickly turn into a metabolic emergency. These episodes, called ketoacidotic crises, are the primary risk associated with Beta-Ketothiolase Deficiency (BKTD) ^[1][2].

Managing your child’s health means having a clear plan for “sick days” to prevent these crises before they escalate.

Early Actions at the First Sign of Illness

You should not wait for severe symptoms to take action. At the first sign of illness (a fever, reduced appetite, or lethargy), begin the oral sick-day protocol prescribed by your metabolic team.

• This usually involves providing specific high-carbohydrate liquids frequently to prevent the body from entering a catabolic state (breaking down its own fat and muscle for fuel) ^[3].
• Call your metabolic clinic to notify them that your child is sick. They will guide you on how long to try oral fluids and when to transition to hospital care.
• Never force oral fluids if your child is too drowsy to swallow safely or is unresponsive.

Common Triggers for a Crisis

A crisis occurs when the body’s energy demands outpace its supply, forcing it to burn fat and release ketones that your child cannot process ^[4]. The most common triggers include:

• Viral Infections: Especially those causing fever, which increases the body’s energy needs ^[5][6].
• Gastrointestinal Illness: Vomiting or diarrhea that prevents your child from keeping down fluids or food ^[3][7].
• Prolonged Fasting: Going too long without eating, which forces the body to rely on stored fats ^[3].
• Ketogenic Diets: Deliberate high-fat ketogenic diets or exceeding the specific protein/fat limits prescribed by your dietitian ^[4]. (Note: Normal, healthy dietary fat within a balanced diet is fine; you should not unnecessarily restrict fat without guidance.)

Red Flags: When to Seek Emergency Care

If your child cannot keep down their prescribed carbohydrates, or if they exhibit any of the following “red flags,” you must seek immediate emergency medical evaluation ^[8][2]:

• Persistent Vomiting: Inability to keep down oral fluids.
• Tachypnea: Rapid, deep, or “labored” breathing (sometimes called Kussmaul breathing), which is the body’s attempt to blow off excess acid ^[8][9].
• Lethargy: Extreme sleepiness or difficulty waking the child up ^[2].
• Altered Consciousness: Confusion, irritability that cannot be calmed, or unresponsive behavior ^[2].
• Severe Dehydration: Dry mouth, no tears when crying, or fewer wet diapers.
  (Call emergency services immediately for unresponsiveness, seizures, severe breathing difficulty, or collapse.)

The Emergency Room Protocol

When you arrive at the hospital, hand the staff your emergency letter. The priority is to stop the catabolic state. The exact treatments will be directed by your metabolic team, but generally include:

• IV Dextrose (Glucose) Infusion: Doctors will start an intravenous (IV) drip of sugar (dextrose) to provide immediate energy. The specific concentration and rate must be individualized based on your child’s letter ^[3][2].
• Laboratory Testing: The team will check blood glucose, electrolytes, and acid-base status (blood gas). Treatment should not be delayed while waiting for these results. Interestingly, blood sugar in BKTD can be low, normal, or even very high during a crisis ^[10][7].
• Specialized Interventions: Interventions like insulin or sodium bicarbonate are not routine. They are highly situation-specific and must be strictly directed by your metabolic specialist. If used improperly, they can be harmful ^[6][11].
• Intensive Care: Severe cases may require admission to the Pediatric Intensive Care Unit (PICU) for close monitoring ^[6][2].

Your Essential Tool: The Emergency Letter

Because BKTD is rare, local ER doctors may be unfamiliar with the standard of care. You must carry a formalized Emergency Letter written by your child’s metabolic geneticist ^[3].

This letter provides the blueprint for the ER and typically contains:

1. The Diagnosis: Your child’s specific condition and the gene involved (ACAT1).
2. Specific IV Instructions: The exact circumstances that trigger IV therapy and the prescribed fluid type and rate to reverse catabolism.
3. Lab Requests: A list of specific tests the lab must run ^[2].
4. Specialist Contact: A 24-hour emergency phone number for your metabolic doctor so the ER can consult with them directly.

Never wait for “office hours” to call your doctor if you see red flags. A metabolic crisis is a medical emergency that requires swift, coordinated intervention ^[3][12].