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Drawbacks of pushovers
1Department of Anaesthetics, Ministry of Defence Hospital Unit, Frimley Park Hospital, Portsmouth Road, Frimley GU16 5UJ, UK.
Anaesthesia
|September 30, 2000
Summary
The Oxford Miniature Vaporiser showed variable performance with different ventilators. When used with the Laerdal bag in a pushover setup, it delivered a higher anesthetic gas output than intended.
Area of Science:
- Anesthesiology
- Medical Device Engineering
Background:
- Military anaesthetists are increasingly using the Oxford Miniature Vaporiser with the Triservice anaesthetic apparatus.
- The vaporiser's performance in pushover and drawover configurations was previously found to be identical with the Cape TC 50 ventilator.
Purpose of the Study:
- To evaluate the performance of the Oxford Miniature Vaporiser with various ventilators in a pushover configuration.
- To identify potential discrepancies in anesthetic gas delivery.
Main Methods:
- The Oxford Miniature Vaporiser was tested with three different ventilators.
- Performance was assessed in a pushover configuration, specifically noting output with the Laerdal bag at normal minute volumes.
Main Results:
- Variable performance was observed across the tested ventilators.
- A higher than set anesthetic gas output was delivered when the vaporiser was used in the pushover configuration with the Laerdal bag.
Conclusions:
- The Oxford Miniature Vaporiser's performance is not consistent across all ventilator types.
- Careful consideration and testing are required when using this vaporiser with specific ventilators, particularly the Laerdal bag in a pushover setup, due to potential for inaccurate anesthetic delivery.