Random Urine, N-Methylhistamine

Synonyms

• LAB11178
• N-METHYLHISTAMINE, RANDOM UR
• N-METHYLHISTAMINE, RANDOM URINE
• NMHR

Cerner Name

N-Methylhistamine, Random Ur

Clinical Info

Monitoring therapeutic progress in conditions that are associated with secondary, localized, low-grade persistent, mast-cell proliferation and activation such as interstitial cystitis

Specimen Sources

Bladder Kidney, Left Kidney, Right Ureter, Left Ureter, Right Urine, Catheter Urine, Clean Catch

Specimen Types

Urine

Specimen Volume

Container

Urine Cup

Collection Instructions

Specimen Type: Urine
Patient Preparation: Patient must not be taking monoamine oxidase inhibitors (MAOIs) or aminoguanidine as these medications increase N-methylhistamine (NMH) levels.
Supplies: Aliquot Tube, 5 mL (T465)
Container/Tube: Plastic vial, 5-mL
Specimen Volume: 5 mL
Collection Instructions:
1. Collect a random urine specimen within a few hours of symptom onset.
2. No preservative.
Specimen Minimum Volume: 3 mL
Specimen Stability Information:
Refrigerated (preferred) 28 days / Frozen 28 days / Ambient 14 days

Transport Instructions

Specimen Stability

Methodology

NMHR1: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
CRETR: Enzymatic Colorimetric Assay

Days Performed

Tuesday, Thursday

Performing Laboratories

Mayo Clinic Laboratories in Rochester

CPT

82542
82570

PDM

2059266

Results

Result Interpretation

Forms