title: Lung volume measured by functional residual capacity in infants following first trimester amniocentesis or chorion villus sampling.
abstract: OBJECTIVE
  To determine the incidence of respiratory problems and lung volume abnormalities in babies born after first trimester amniocentesis or chorion villus sampling.
  
  
  METHODS
  A prospective randomized study.
  
  
  METHODS
  Harris Birthright Research Centre for Fetal Medicine, Paediatric Respiratory Laboratory, King's College Hospital.
  
  
  METHODS
  Babies of mothers who had undergone first trimester amniocentesis (n = 74) or chorion villus sampling (CVS) (n = 86) for fetal karyotyping because of advanced maternal age, parental anxiety or family history of chromosomal abnormality in the absence of parental chromosome re-arrangement.
  
  
  RESULTS
  Respiratory distress in the neonatal period and lung volume as assessed by measurement of functional residual capacity (FRC).
  
  
  RESULTS
  CVS was associated with a significantly higher incidence of neonatal respiratory distress, six infants in the CVS group but none in the amniocentesis group required admission to the special care baby unit because of respiratory distress (P less than 0.05). Although there was no significant difference in the mean FRC between the two groups (amniocentesis 29.7 ml/kg vs CVS 29.6 ml/kg) the overall incidence of FRC values less than 2.5th centile of the normal range was 9%.
  
  
  CONCLUSIONS
  Both amniocentesis and CVS performed in the first trimester of pregnancy may impair antenatal lung growth.
authors.affiliation: Department of Child Health, King's College Hospital Medical School, London, UK.
authors.forename: P J
authors.initials: PJ
authors.lastname: Thompson
authors.forename: A
authors.initials: A
authors.lastname: Greenough
authors.forename: K H
authors.initials: KH
authors.lastname: Nicolaides
mesh_terms: D000649:Amniocentesis / Q000009:adverse effects*; D015193:Chorionic Villi Sampling / Q000009:adverse effects*; D005260:Female; D005652:Functional Residual Capacity / Q000502:physiology*; D006801:Humans; D007231:Infant, Newborn; D015931:Intensive Care, Neonatal; D008168:Lung / Q000503:physiopathology*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011446:Prospective Studies; D011897:Random Allocation; D012120:Respiration Disorders / Q000209:etiology / Q000503:physiopathology*