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Routine pre-oxygenation using a Hudson mask. A comparison with a conventional pre-oxygenation technique

D A Hett1, I F Geraghty, R Radford

  • 1Department of Anaesthesia, Southampton General Hospital.

Anaesthesia
|February 1, 1994
PubMed
Summary
This summary is machine-generated.

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Two pre-oxygenation methods were compared in healthy volunteers. Conventional pre-oxygenation significantly increased pulmonary oxygen reserve compared to a Hudson mask technique, which is suitable for routine cases.

Area of Science:

  • Anesthesiology
  • Respiratory Physiology

Background:

  • Pre-oxygenation is crucial for increasing the patient's oxygen reserve before anesthesia.
  • Conventional pre-oxygenation methods aim to maximize the fraction of inspired oxygen (FiO2).

Purpose of the Study:

  • To compare the efficacy of two pre-oxygenation techniques using continuous analysis of respired gases.
  • To evaluate the impact of a Hudson mask versus a conventional tightly-fitting mask on oxygenation.

Main Methods:

  • Continuous analysis of respired gases via mass spectrometry in 10 healthy volunteers.
  • Comparison of a conventional Bain system with a tightly-fitting mask versus a Bain system with a Hudson mask, both with 8 L/min oxygen flow.

Main Results:

  • Mean fractional end-tidal oxygen (FETO2) after 3 minutes was 0.812 for the conventional technique and 0.46 for the Hudson mask technique.

Related Experiment Videos

  • Both techniques significantly increased pulmonary oxygen reserve compared to breathing air (FETO2 = 0.16).

    • Conclusions:

    • Conventional pre-oxygenation with a tightly-fitting mask is more effective in increasing oxygen reserve than using a Hudson mask.
    • The Hudson mask technique is a simple, acceptable method for routine pre-oxygenation but not a substitute for emergency anesthesia.