24 Hour Urine, N-Methylhistamine Build info

Synonyms

• N-METHYLHISTAMINE, 24HR URINE
• NMETHHIS24
• N-METHYLHISTAMINE, 24HR UR
• LAB11043

Short Name

N-METHYLHISTAMINE, 24HR URINE

Procedure Master Number

LAB11043

Procedure ID

114492

Clinical Info

Screening for and monitoring of mastocytosis and disorders of systemic mast-cell activation, such as anaphylaxis and other forms of severe systemic allergic reactions using 24-hour urine collection specimens
Monitoring therapeutic progress in conditions that are associated with secondary, localized, low-grade persistent, mast-cell proliferation and activation such as interstitial cystitis

Specimen Type

Urine

Container

24hr Ur No Preserv

Collection Instructions

Container/Tube: 24 Hr urine container No preservative
Specimen: 5 mL from well mixed 24 Hr urine collection (3 mL min)
Transport Temperature: Refrigerated
Stability: 14 Days Room Temperature
28 Days Refrigerated or Frozen
Patient Preparation: Patient must not be taking monoamine oxidase inhibitors (MAOIs) or aminoguanidine as these
medications increase N-methylhistamine (NMH) levels.

Transport Instructions

Refrigerated

Specimen Stability

14 Days Room Temperature
28 Days Refrigerated or Frozen
Patient Preparation: Patient must not be taking monoamine oxidase inhibitors (MAOIs) or aminoguanidine as
these medications increase N-methylhistamine (NMH) levels.

Methodology

N-methylhistamine: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Creatinine 24: Enzymatic Colorimetric Assay

Days Performed

TAT; 4-8 Days

Performing Laboratory

Mayo Medical Laboratories

CPT

82542
LOINC Code: 44340-8

PDM

1859099

Results