Test directory: Chromosome Analysis, Whole Blood

Ordering Code7960
Test NameChromosome Analysis, Whole Blood
AliasKaryotyping, Blood
Cytogenetics, Blood C.A.
Karyotype
Routine G-Banding
Preferred SpecimenWhole Blood
Preferred ContainerSodium Heparin (Green)
Optimum Volume5 mL
Neonate: 1-2 mL
Collection InstructionsCollect Monday - Wednesday only
Note date and time of collection directly on tube. Note specimen type on tube
For collections in Saipan:
Only on Mondays from 1:00pm - 3:00pm
For collections in Guam:
DLS Guam collections must be coordinated on Tuesdays at ITC (Main lab) from 9:00am - 10:30am.
Transport RequirementsOahu: Ambient
Airline: Refrigerated
Specimen StabilityFrozen: Not Stable
Optimum transport <72 hours
Do not reject. Send specimen to testing lab for viability determination.
Rejection CriteriaNot for stillborn cases, skin biopsy, or placental villi.
Avail. StatNO
Analytic Time13 Days
MethodologyLymphocyte culture with mitogen stimulation, colchicine arrest of cells in mitosis with predominantly early metaphases, methanol/acetic acid fixation, spread preparation, trypsin-Giemsa banding, chromosome analysis of 20 metaphases with preparation and analysis of multiple karyotypes. Other banded preparations are made as needed
Fluorescence in situ hybridization (FISH) ordered as needed.
Reference Lab Labcorp

Reference range(s)

The reference ranges listed below are valid on this date of March 31, 2025.
ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Specimen TypeALLSee report.
Cells CountedALLSee report.
Cells AnalyzedALLSee report.
Cells KaryotypedALLSee report.
GTG Band Resolution AchievedALLSee report.
Cytogenetic ResultALLSee report.
InterpretationALLSee report.
Director ReviewALLSee report.
PDFALLSee report.