title: Sensitivity and specificity of intrapartum computerised FIGO criteria for cardiotocography and fetal scalp pH during labour: multicentre, observational study.
abstract: OBJECTIVE
  To identify sensitivity and specificity of computerised cardiotocography (CTG) analysis for fetal acidosis during delivery.
  
  
  METHODS
  Retrospective observational study.
  
  
  METHODS
  Tertiary referral labour ward, Technical University München (TUM) and University Witten/Herdecke (UWH).
  
  
  METHODS
  All deliveries, which had at least one fetal scalp pH measurement and electronically saved CTG traces, between 2000 and 2002 (TUM) and between 2004 and 2005 (UWH).
  
  
  METHODS
  Correlation analysis of fetal scalp pH values and computerised International Federation of Obstetrics and Gynecology (FIGO) classification using 'CTG Online' program of digitally saved CTG traces.
  
  
  METHODS
  Fetal scalp pH values, FIGO parameter (baseline, variability, acceleration and deceleration) using computerised analysis.
  
  
  RESULTS
  Both collectives showed a high sensitivity (95.0%) for computerised FIGO classification 'suspect' and 'pathological', together with a low specificity (21.8%) for fetal acidosis. The most sensitive single FIGO parameter was deceleration. Very low sensitivity (<50%) was shown for the parameters variability and acceleration.
  
  
  CONCLUSIONS
  Computerised CTG analysis is highly sensitive for fetal acidosis and can be used as an objective adjunctive criterion during delivery. Further CTG data are needed to adjust and optimise each FIGO parameter and increase sensitivity and specificity.
authors.affiliation: Department of Obstetrics and Gynaecology, University Witten/Herdecke, Marien-Hospital, Witten, Germany. Dr.Schiermeier@gmx.de
authors.forename: S
authors.initials: S
authors.lastname: Schiermeier
authors.forename: S
authors.initials: S
authors.lastname: Pildner von Steinburg
authors.forename: A
authors.initials: A
authors.lastname: Thieme
authors.forename: J
authors.initials: J
authors.lastname: Reinhard
authors.forename: M
authors.initials: M
authors.lastname: Daumer
authors.forename: M
authors.initials: M
authors.lastname: Scholz
authors.forename: W
authors.initials: W
authors.lastname: Hatzmann
authors.forename: K T M
authors.initials: KT
authors.lastname: Schneider