Sick Day Rules and Emergency Hospital Protocols

When your child is well, MCADD is manageable. When your child is sick, management becomes a medical priority. Because your child cannot rely on “backup fuel” (fat) when they are ill and refusing food, you must act quickly to provide them with the sugar they need to stay safe ^[1][2].

Signs of a Metabolic Crisis

In MCADD, a “crisis” (metabolic decompensation) is a state where the body is starving for energy and toxic byproducts are building up ^[3][4]. You must seek emergency care immediately if you notice:

• Extreme Lethargy: Your child is unusually sleepy, difficult to wake, or seems “floppy.”
• Vomiting: This is a major warning sign because it means your child cannot take in the sugar they need orally ^[3].
• Altered Behavior: Irritability, confusion, or a “spaced-out” look.
• Rapid Breathing: This can be a sign that the body is trying to compensate for metabolic stress.

The Emergency Home Protocol: “Sick Day Rules”

At the first sign of illness—even a simple fever or a cold—you should switch to your Emergency Protocol ^[5].

1. High-Carb Fluids: Use a specific glucose polymer drink (like SOS or Maxijul) as directed by your specialist. These drinks are typically prescribed or recommended by your metabolic clinic and dietitian.
2. Mixing Ratios: Always verify the exact mixing ratios with your dietitian. Mixing these powders at too high a concentration can cause osmotic diarrhea, which will rapidly worsen dehydration.
3. Frequent Dosing: Offer small amounts of the drink every 1 to 2 hours, even through the night.
4. No Diet Drinks: Never use diet, sugar-free, or zero-calorie beverages (like diet sports drinks) during a sick day. These provide zero energy and will push the body rapidly into a dangerous metabolic crisis ^[2].

At the Hospital: Why D10 Matters

If your child cannot keep down their sick-day fluids or shows signs of lethargy, you must go to the Emergency Room (ER). The standard treatment is intravenous (IV) 10% dextrose (D10) ^[6][7].

• The Power of D10: D10 is a high-concentration sugar solution. It does more than just fix low blood sugar; it sends a powerful signal to the body to stop trying to burn fat. This “shuts off” the production of toxic medium-chain byproducts ^[6][7].
• Infusion Rates: During a crisis, D10 is often given at a rate higher than a “normal” child would receive (often 1.5 times the maintenance rate) to ensure the metabolism stays stable ^[6].

Your Role as an Advocate

You may encounter ER staff who have never treated a patient with MCADD. You must be prepared to be your child’s strongest advocate.

• The Emergency Go-Bag: Keep a pre-packed bag containing your specialist’s Emergency Letter, specialized glucose polymer powder, a measuring scoop, and a copy of their safe fasting intervals to grab quickly during an ER trip.
• The Emergency Letter: This is a signed letter from your specialist explaining exactly what MCADD is, the risk of sudden death or brain damage, and the specific IV treatment required based on your child’s current weight ^[5][8].
• What to Say: When you arrive at triage, lead with: “My child has a metabolic disorder called MCADD. They are in a metabolic emergency and need immediate IV 10% dextrose. Here is the protocol from their specialist.”
• Insist on the Specialist: Ask the ER doctor to call your child’s metabolic specialist immediately ^[8].

Remember: In the ER, a “normal” blood sugar reading can be dangerously misleading in an MCADD patient who is currently in metabolic stress. The IV glucose should be started based on the protocol and the child’s symptoms (like vomiting or lethargy), not just a blood sugar number ^[8][5].