Artifacts in fetal pulse oximetry

  • J. Gardosi


One of the problems with pulse oximeters is that they can often give a saturation reading regardless of accuracy; some commercially available oximeters will give a value when the sensors are left on the table (“room air saturation”); regular taps on the table will even give a modulated or “pulsatile” signal.


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  1. 1.
    Aarnoudse JG (1994) Fetal scalp circulation as recorded by laser Doppler flowmetry. In: van Geijn, Copray (eds) A Critical Appraisal of Fetal Surveillance. Elsevier AmsterdamGoogle Scholar
  2. 2.
    Cheng EY, Hopwood MB, Kay J (1988) Forehead pulse oximetry compared with finger pulse oximetry and arterial blood gas measurement. J Clin Monit 4: 223–6PubMedCrossRefGoogle Scholar
  3. 3.
    Dassel ACM, Graaf R, Elstrodt JM, et al. (1993) Reflectance pulse oximetry during circular pressure at the head of fetal lambs. In: R Knitza (ed) Fetal O2 Monitoring sub partu. Medifact, Landsberg, GermanyGoogle Scholar
  4. 4.
    Gardosi J, Damianou D, Schram CMH (1994) Artifacts in fetal pulse oximetry: Incomplete sensor-to-skin contact. Am J Obstet Gynecol 170:1169–73PubMedGoogle Scholar
  5. 5.
    Gardosi J, Schram CMH, Symonds EM (1991) Adaptation of pulse oximetry for fetal monitoring during labour. Lancet 337:1265–7PubMedCrossRefGoogle Scholar
  6. 6.
    Johnson N, Johnson V, Bannister J, Lilford R. (1990) The effect of caput succedaneum on oxygen saturation measurements. Br J Obstet Gynecol 97: 493–8CrossRefGoogle Scholar
  7. 7.
    Kelleher JF, Ruff RH (1989) The penumbra effect: vasomotion dependent pulse oximeter artifact due to probe malposition. Anaesthsiology 51: 787–91CrossRefGoogle Scholar
  8. 8.
    Schram CMH, Gardosi J. (1990) The effect of caput succedaneum on oxygen saturation measurements. Br J Obstet Gynecol 98:113–4Google Scholar
  9. 9.
    Schram CMH, Gardosi JO (1994) Artifacts in fetal pulse oximetry: non-arterial pulsatile signals. Am J Obstet Gynecol 170:1174–7PubMedGoogle Scholar
  10. 10.
    Southall D, Samuels C (1992) Inappropriate sensor application in pulse oximetry. Lancet 340: 48CrossRefGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag, GmbH & Co. KG, Darmstadt 1994

Authors and Affiliations

  • J. Gardosi
    • 1
  1. 1.Perinatal Research and Monitoring UnitQueen’s Medical CentreNottinghamUK

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