Chromosome Analysis, Prenatal Cordocentesis and Fetal Hemoglobin

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Test Details

Synonyms

  • Karyotyping
  • Percutaneous Umbilical Cord Sampling (PUBS)

Use

Rapid analysis of fetal chromosomes, used most frequently following the determination of fetal amniocyte mosaicism

Methodology

Standard G-banded karyotyping and isoelectric focusing of hemoglobin to confirm fetal derivation of the sample

Specimen Requirements

Specimen

Fetal blood

Volume

1 to 3 mL

Minimum Volume

0.5 mL

Container

Green-top (sodium heparin) pediatric tube

Storage Instructions

Maintain specimen at room temperature.

Causes for Rejection

Specimen frozen; clotted specimen; specimen determined to be maternal in origin

Clinical Information

Special Instructions

Medical indication for procedure and the patient's name and age should be included on the request form.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
511025 Chromosome, Cordocentesis/HbF 512065 Specimen Type 31208-2
511025 Chromosome, Cordocentesis/HbF 512067 Cells Counted 62361-1
511025 Chromosome, Cordocentesis/HbF 512068 Cells Analyzed 62360-3
511025 Chromosome, Cordocentesis/HbF 512069 Cells Karyotyped 55199-4
511025 Chromosome, Cordocentesis/HbF 512070 GTG Band Resolution Achieved 62358-7
511025 Chromosome, Cordocentesis/HbF 512071 Cytogenetic Result 29770-5
511025 Chromosome, Cordocentesis/HbF 510997 Interpetation 62365-2
511025 Chromosome, Cordocentesis/HbF 510998 Director Review: 48672-0
511025 Chromosome, Cordocentesis/HbF 510180 Fetal Hemoglobin 28067-7
511025 Chromosome, Cordocentesis/HbF 510182 Fetal Hemoglobin N/A
511025 Chromosome, Cordocentesis/HbF 512123 PDF 80563-0

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The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf