fetal blood sampling
Invasive diagnostic procedure to obtain fetal blood through percutaneous umbilical cord sampling for genetic or hematologic analysis.
Full Definition
An invasive prenatal diagnostic procedure involving ultrasound-guided needle insertion into the umbilical cord to obtain fetal blood for analysis. Also known as cordocentesis or percutaneous umbilical blood sampling (PUBS), this technique allows direct assessment of fetal hematologic parameters, blood gases, and rapid karyotyping. The procedure is typically performed after 18 weeks of gestation when the umbilical cord is adequately large. Indications include investigation of fetal anemia, thrombocytopenia, suspected infection, or when rapid chromosomal analysis is required. The procedure carries a small risk of complications including bleeding, infection, and pregnancy loss.
Usage
Usage note: Distinguish from other sampling procedures like amniocentesis which samples amniotic fluid.
In Context
- "Fetal blood sampling was performed to assess the severity of suspected fetal anemia." — Procedure report
- "The results of fetal blood sampling confirmed fetal thrombocytopenia requiring treatment." — Laboratory report