Lab Information Manual

Laboratory:

Clinical Biochemistry

Test Name:

CITRULLINE - (P)

Test Code: AAQP

Clinical Information:

Plasma Citrulline concentration is a reliable quantitative biomarker for enterocyte mass and absorptive capacity. This test replaced D-Xylose Absorption Test.

Adult: overnight fasting
Children: 4 hours of fasting or collected prior to next feeding

CSF, Plasma or Urine may be ordered for other needs. Register with applicable test code as per specimen type:
CSF: AAQC
Plasma: AAQP
Urine: AAQU

Collection Devices:

Preferred Device:	1 - Li Heparin, NO GEL 4.0 mL Tube(s) - Full Tube Collection
Alternate Device:	1 - Microtainer(s) - EDTA, NO GEL (0.5 mL) to fill line

Preferred device: Fasting sample collected ON ICE.
Alternative device: or 1 Lithium Heparin PST Microtainer - infants collected prior to next feeding, sample collected ON ICE.
Lithium Heparin, Na Heparin or EDTA with or without barrier gel tube(s) also acceptable.
FASTING sample collected ON ICE.

Specimen Required:

Plasma: 1.0 mL

Pediatric Plasma: 0.25 mL

Referral:

Requisition:

_SH Biochemical Genetics Laboratory Requisition (R250-10-69)

Reference Values:

Availability:

Within 10 Days