Seizure activity or any change in level of alertness
New neurological symptoms: weakness, abnormal movements
Surgery and procedures
Contact metabolic center before any surgery or procedure requiring fasting
IV glucose must be started before the fast begins
Anesthesia team must be notified of MCAD diagnosis in advance
References
Guidelines and key sources
McGregor TL, Berry SA, Dipple KM, Hamid R. Management Principles for Acute Illness in Patients With Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency. Pediatrics. 2021
Primary AAP guideline for acute ED and inpatient management
Anderson DR, Viau K, Botto LD, Pasquali M, Longo N. Clinical and Biochemical Outcomes of Patients With Medium-Chain Acyl-CoA Dehydrogenase Deficiency. Molecular Genetics and Metabolism. 2020
Longitudinal outcomes data
No irreversible complications observed with adherence to fasting protocols
Supporting literature
Van Hove JL, Zhang W, Kahler SG, et al. Medium-Chain Acyl-CoA Dehydrogenase (MCAD) Deficiency: Diagnosis by Acylcarnitine Analysis in Blood. American Journal of Human Genetics. 1993
Foundational acylcarnitine diagnostic criteria
C8 threshold and ratio data
Hsu HW, Zytkovicz TH, Comeau AM, et al. Spectrum of MCAD Deficiency Detected by Newborn Screening. Pediatrics. 2008
NBS population data and clinical spectrum
Impact of universal screening on mortality
Mütze U, Nennstiel U, Odenwald B, et al. Sudden Neonatal Death in Individuals With MCAD Deficiency: Limit of Newborn Screening. European Journal of Pediatrics. 2022
Neonatal mortality risk before NBS result available
Supports immediate triage for suspected neonatal MCAD
Wang SS, Fernhoff PM, Hannon WH, Khoury MJ. Medium Chain Acyl-CoA Dehydrogenase Deficiency Human Genome Epidemiology Review. Genetics in Medicine. 2001
Epidemiology and population genetics
Incidence data, carrier frequency, Northern European founder effect
Weiss KJ, Berger U, Haider M, et al. Free carnitine concentrations and biochemical parameters in MCAD deficiency: Genotype-phenotype correlation. Clinical Genetics. 2023
Carnitine levels and supplementation evidence
Guides threshold-based supplementation approach
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.