Advertisement

Artifacts in fetal pulse oximetry

  • J. Gardosi

Abstract

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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  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

Personalised recommendations