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Related Experiment Videos

Isosulfan blue affects pulse oximetry.

L Vokach-Brodsky1, S S Jeffrey, H J Lemmens

  • 1Deparments of Anesthesia and Surgery, Stanford University School of Medicine, Stanford, California, USA.

Anesthesiology
|October 6, 2000
PubMed
Summary

Isosulfan blue (IB) dye can interfere with pulse oximetry (Spo2) readings. This study found significant Spo2 desaturation in breast cancer patients after IB injection, impacting monitoring accuracy.

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Area of Science:

  • Medical diagnostics
  • Surgical monitoring
  • Pharmacology

Background:

  • Vital dyes can affect pulse oximetry (Spo2) readings.
  • Isosulfan blue (IB) is a vital dye used in surgery.
  • The impact of IB on Spo2 requires investigation.

Purpose of the Study:

  • To evaluate the effect of isosulfan blue (IB) on pulse oximetry (Spo2) values.
  • To determine the extent and duration of Spo2 interference caused by IB.
  • To inform surgical monitoring practices when using IB.

Main Methods:

  • Thirty-three breast cancer surgery patients were enrolled.
  • Isosulfan blue (50 mg) was injected peritumorally.
  • Pulse oximetry (Spo2) was continuously monitored for 130 minutes post-injection.

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  • Friedman's repeated-measures analysis of ranks was used for statistical analysis.

    • Main Results:

    • Significant Spo2 desaturation was observed at multiple time points (5-60 minutes) post-IB injection (P < 0.05).
    • A maximum Spo2 decrease of approximately 3% was noted around 25 minutes after IB administration.
    • These findings indicate a measurable interference with Spo2 monitoring.

    Conclusions:

    • Peritumoral administration of 50 mg isosulfan blue significantly interferes with pulse oximetry (Spo2) readings.
    • The observed Spo2 desaturation necessitates careful consideration during surgical procedures involving IB.
    • Clinicians should be aware of potential monitoring inaccuracies when using this dye.