Cordocentesis

Dr Henry Knipe 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. The site of cord insertion is at the placenta where the cord is relatively fixed is generally 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 foetus.

There is a higher complication rate if performed prior to 20 weeks. An associated foetal 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:
  • Percutaneous umbilical cord blood sampling (PUBS)
  • Percutaneous umbilical cord blood sampling

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