Ordering Recommendation

Evaluate carbohydrate malabsorption due to disaccharidase deficiency.

Mnemonic
DISACT
Methodology

Quantitative Spectrophotometry

Performed

Mon, Wed, Fri

Reported

1-6 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Biopsies of small bowel by endoscopy.

Specimen Preparation

Place two 5 mg biopsies of tissue on the wall of a small, tightly-capped plastic tube without any supporting media or an ARUP Standard Transport Tube and freeze within 2 hours of collection. (Min: 2 (two) 5 mg biopsies)

Storage/Transport Temperature

Frozen. Ship on dry ice.

Unacceptable Conditions

Specimens placed on gauze, filter paper, or any other type of support media. Tissue preserved in formalin.

Remarks
Stability

Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 6 months

Reference Interval
Component Reference Interval
Lactase Greater than or equal to 10.0 µmol/min/g protein
Maltase Greater than or equal to 100.0 µmol/min/g protein
Palatinase Greater than or equal to 9.0 µmol/min/g protein
Sucrase Greater than or equal to 25.0 µmol/min/g protein

Interpretive Data



Compliance Category

Laboratory Developed Test (LDT)

Note
Hotline History
N/A
CPT Codes

82657

Components
Component Test Code* Component Chart Name LOINC
2002249 Sucrase 14178-8
2002251 Lactase 1942-2
2002253 Palatinase 14168-9
2002255 Maltase 29640-0
2002487 Disaccharidase Interpretation 57779-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Isomaltase
  • Lactase
  • Maltase
  • Palatinase
  • Sucrase
Disaccharidase in Tissue