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Test ID: C4U    
C4 Acylcarnitine, Quantitative, Urine

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.

Conditional

Useful For Suggests clinical disorders or settings where the test may be helpful

Evaluation of patients with abnormal newborn screens showing elevations of C4 to aid in the differential diagnosis of short-chain acyl-CoA dehydrogenase and isobutyryl-CoA dehydrogenase deficiencies

Genetics Test Information Provides information that may help with selection of the correct test or proper submission of the test request

Useful for differentiating the potential diagnoses of SCAD versus isobutyryl-CoA dehydrogenase deficiency. The results are not informative when patient is receiving L-carnitine supplements.

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

See Newborn Screening Follow-up for Isolated C4 Acylcarnitine Elevations (also applies to any plasma C4 acylcarnitine elevation) in Special Instructions.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

Method Name A short description of the method used to perform the test

Flow Injection Analysis-Tandem Mass Spectrometry (FIA-MS/MS)

Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

C4 Acylcarnitine, QN, U

Aliases Lists additional common names for a test, as an aid in searching

Acylcarnitines, urine
Butyrylcarnitine
Isobutyryl
Isobutyrylcarnitine
IBDH (Isobutyryl-CoA Dehydrogenase) Deficiency
Isobutyryl-CoA Dehydrogenase (IBDH) Deficiency
Short Chain Acyl-CoA Dehydrogenase (SCAD) Deficiency