CHROMOSOME ANALYSIS-PRENATAL-AMNIOTIC FLUID/FETAL URINE

Methodology: G-Banded Chromosome Analysis

Purpose: Prenatal Diagnosis- Increased risk for Chromosomal Abnormalities or Neural Tube Defects

Sample Requirements: Collect 15-20 ml of fluid. Sterilely transfer the fluid to a screw top centrifuge tube to ensure limited exposure of the fluid to the syringes used for collection. Please record the patient's gestational age on the requisition form. Keep the specimen cool but do not freeze.

Test Requisition: Cytogenetics Requisition

Turn-Around-Time: 5-7 days

CPT Codes: 88235, 88267, 88291

FISH ANALYSIS-PRENATAL-AMNIOTIC FLUID/FETAL URINE

Methodology: FISH Analysis

Purpose: Prenatal Diagnosis- Increased risk for Chromosomal Abnormalities or Neural Tube Defects

Sample Requirements: Collect 15-20 ml of amniotic fluid for karyotyping. If the doctor is requesting FISH studies include an additional 3 ml of fluid. Sterilely transfer the fluid to a screw top centrifuge tube to ensure limited exposure of the fluid to the syringes used for collection. Keep the specimen cool but do not freeze. Please record the patient's gestational age on the requisition form.

Test Requisition: Cytogenetics Requisition

Turn-Around-Time for FISH: 5-7 days

CPT Codes: 88271, 88275, 88291