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Amino Acid Profile, Quantitative, Cerebrospinal Fluid

CPT 82139

Test Details

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Result Turnaround Time

4 - 10 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Information

Related Documents

Use

Diagnosis and monitoring of inherited aminoacidurias. Most notably, quantitation of amino acids in CSF is useful in the diagnosis of glycine encephalopathy. CSF samples are most informative when a plasma sample is collected at the same time and ratios of the amino acid concentrations in CSF to plasma are calculated.

Limitations

False-negative results can occur, especially when a patient is affected with a mild or intermittent variant of a disorder, or when clinical condition or dietary treatment causes secondary changes to the profile. Results of amino acid profiling should be interpreted in the context of clinical presentation as well as other laboratory tests.

This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.

References

Bremer HJ, Duran M, Kamerling JP, et al. Disturbances of Amino Acid Metabolism: Clinical Chemistry and Diagnosis. Baltimore, Md: Urban and Schwarzenberg; 1981.

Specimen Requirements

Specimen

Cerebrospinal fluid (CSF), frozen

Volume

0.5 mL

Minimum Volume

0.15 mL (Note: This volume does not allow for repeat testing.)

Container

Plastic transport tube

Collection Instructions

To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Stability Requirements

Temperature

Period

Room temperature

Unstable

Refrigerated

Unstable

Frozen

14 days

Reference Range

See Cerebrospinal Fluid Amino Acid Reference Intervals in the Test Resources pages online.

Storage Instructions

Freeze.

Causes for Rejection

Gross contamination with blood; room temperature or thawed specimen

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
700180 Amino Acid Profile, Qn, CSF 700141 Taurine umol/L 26614-8
700180 Amino Acid Profile, Qn, CSF 700142 Aspartate umol/L 22655-5
700180 Amino Acid Profile, Qn, CSF 700143 Threonine umol/L 22643-1
700180 Amino Acid Profile, Qn, CSF 700144 Serine umol/L 22644-9
700180 Amino Acid Profile, Qn, CSF 700145 Asparagine umol/L 26603-1
700180 Amino Acid Profile, Qn, CSF 700146 Glutamate umol/L 22652-2
700180 Amino Acid Profile, Qn, CSF 700147 Glutamine umol/L 22641-5
700180 Amino Acid Profile, Qn, CSF 700148 Glycine umol/L 22650-6
700180 Amino Acid Profile, Qn, CSF 700149 Alanine umol/L 22657-1
700180 Amino Acid Profile, Qn, CSF 700150 Citrulline umol/L 22654-8
700180 Amino Acid Profile, Qn, CSF 700151 Valine umol/L 22649-8
700180 Amino Acid Profile, Qn, CSF 700152 Cystine umol/L 22653-0
700180 Amino Acid Profile, Qn, CSF 700153 Methionine umol/L 22648-0
700180 Amino Acid Profile, Qn, CSF 700154 Isoleucine umol/L 22659-7
700180 Amino Acid Profile, Qn, CSF 700155 Leucine umol/L 9412-8
700180 Amino Acid Profile, Qn, CSF 700156 Tyrosine umol/L 22642-3
700180 Amino Acid Profile, Qn, CSF 700157 Phenylalanine umol/L 22646-4
700180 Amino Acid Profile, Qn, CSF 700158 Beta-alanine umol/L 26589-2
700180 Amino Acid Profile, Qn, CSF 700159 Gamma-aminobutyrate umol/L 26594-2
700180 Amino Acid Profile, Qn, CSF 700160 Ornithine umol/L 22647-2
700180 Amino Acid Profile, Qn, CSF 700161 Lysine umol/L 22651-4
700180 Amino Acid Profile, Qn, CSF 700162 Histidine umol/L 9453-2
700180 Amino Acid Profile, Qn, CSF 700163 Arginine umol/L 22656-3
700180 Amino Acid Profile, Qn, CSF 700164 Interpretation 49303-1
700180 Amino Acid Profile, Qn, CSF 700165 Director Review 72486-4
700180 Amino Acid Profile, Qn, CSF 700166 Methodology 49549-9
700180 Amino Acid Profile, Qn, CSF 700471 Disclaimer: N/A
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700141
Result Code NameTaurine
UofMumol/L
Result LOINC26614-8
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700142
Result Code NameAspartate
UofMumol/L
Result LOINC22655-5
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700143
Result Code NameThreonine
UofMumol/L
Result LOINC22643-1
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700144
Result Code NameSerine
UofMumol/L
Result LOINC22644-9
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700145
Result Code NameAsparagine
UofMumol/L
Result LOINC26603-1
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700146
Result Code NameGlutamate
UofMumol/L
Result LOINC22652-2
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700147
Result Code NameGlutamine
UofMumol/L
Result LOINC22641-5
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700148
Result Code NameGlycine
UofMumol/L
Result LOINC22650-6
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700149
Result Code NameAlanine
UofMumol/L
Result LOINC22657-1
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700150
Result Code NameCitrulline
UofMumol/L
Result LOINC22654-8
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700151
Result Code NameValine
UofMumol/L
Result LOINC22649-8
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700152
Result Code NameCystine
UofMumol/L
Result LOINC22653-0
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700153
Result Code NameMethionine
UofMumol/L
Result LOINC22648-0
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700154
Result Code NameIsoleucine
UofMumol/L
Result LOINC22659-7
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700155
Result Code NameLeucine
UofMumol/L
Result LOINC9412-8
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700156
Result Code NameTyrosine
UofMumol/L
Result LOINC22642-3
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700157
Result Code NamePhenylalanine
UofMumol/L
Result LOINC22646-4
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700158
Result Code NameBeta-alanine
UofMumol/L
Result LOINC26589-2
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700159
Result Code NameGamma-aminobutyrate
UofMumol/L
Result LOINC26594-2
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700160
Result Code NameOrnithine
UofMumol/L
Result LOINC22647-2
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700161
Result Code NameLysine
UofMumol/L
Result LOINC22651-4
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700162
Result Code NameHistidine
UofMumol/L
Result LOINC9453-2
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700163
Result Code NameArginine
UofMumol/L
Result LOINC22656-3
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700164
Result Code NameInterpretation
UofM
Result LOINC49303-1
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700165
Result Code NameDirector Review
UofM
Result LOINC72486-4
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700166
Result Code NameMethodology
UofM
Result LOINC49549-9
Order Code700180
Order Code NameAmino Acid Profile, Qn, CSF
Order Loinc
Result Code700471
Result Code NameDisclaimer:
UofM
Result LOINCN/A