Dr Daniel J Bell and Radswiki et al.

Cordocentesis is a method of fetal blood sampling which is usually carried out under ultrasound guidance.

It may be performed for various reasons which include:

Usually, a 20-gauge spinal needle is inserted under direct sonographic guidance towards the umbilical vein.  A typical sampling site would be where the segment of the umbilical cord is closest to the placenta where the cord is relatively fixed. The presence of a posterior placenta increases the difficulty of the procedure and in such cases, a muscle relaxant may be required prior to the procedure to immobilise the intervening fetus.

There is a higher complication rate if performed prior to 20 weeks. An associated fetal loss rate as high as 4% has been reported 2.

Recognised complications include:

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Article information

rID: 15266
Tag: cases
Synonyms or Alternate Spellings:
  • Cordocenteses
  • Umbilical vein sampling
  • Fetal blood sampling
  • Percutaneous umbilical cord blood sampling (PUBS)
  • Percutaneous umbilical cord blood sampling

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