Patients with Glycogen Storage Disease Type VI can experience acute metabolic decompensation when specific physiological stressors disrupt their ability to maintain adequate blood glucose through oral feeding.

Clinical Scenario

A metabolic crisis may be precipitated by prolonged fasting or illness in GSD VI. Febrile illness can increase glucose requirements, and gastrointestinal illness can make it difficult or impossible to tolerate frequent oral feedings — removing a critical safeguard against hypoglycemia.

Management Approach

The acute crisis is managed with intravenous dextrose support, with the infusion rate adjusted according to blood glucose response. Once full oral intake resumes, a structured weaning process is followed. The complete regimen, electrolyte guidance, monitoring schedule, and weaning protocol are available in the full structured protocol.

References

DOI: 10.1038/s41436-018-0364-2

A metabolic crisis may be precipitated by prolonged fasting or illness in GSD VI and IX.
Febrile illness can increase glucose requirements, and gastrointestinal illness can make it difficult or impossible to tolerate frequent oral feedings.
When intravenous dextrose support is required, a concentration of 10% dextrose should be used at a rate that is 1–1.25 times the maintenance rate with appropriate electrolytes.
The rate can be increased based on blood glucose levels.
Dextrose support should be weaned over a 2–3 hour period once full enteral intake is tolerated.
Blood glucose and β-OHB concentrations should be measured upon arrival, and blood glucose should be measured hourly on intravenous fluids until it is determined they are stable and greater than 70 mg/dL.

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Acute Metabolic Crisis in GSD Type VI Precipitated by Prolonged Fasting, Febrile Illness, or Gastrointestinal Illness

Clinical Scenario

Management Approach

Clinical Goal

References