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Drawover anaesthesia and preoxygenation.

D M Lowe¹, W McFadzean

¹Anaesthetic Department, British Military Hospital Rinteln.

British Journal of Anaesthesia

|February 1, 1991

Summary

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The Triservice Anaesthetic Apparatus (TSA) provided unsatisfactory preoxygenation. The Mapleson D (Bain) system is a superior alternative for field preoxygenation, requiring only 4 liters of oxygen per minute.

Area of Science:

Anesthesiology
Respiratory Medicine
Critical Care Medicine

Background:

Preoxygenation is crucial for maintaining oxygenation during apnea.
The Triservice Anaesthetic Apparatus (TSA) has shown limitations in delivering effective preoxygenation.
Field anesthesia requires efficient and portable oxygenation techniques.

Purpose of the Study:

To evaluate the efficacy of the Triservice Anaesthetic Apparatus (TSA) for preoxygenation.
To explore and assess an alternative preoxygenation method for field use.
To compare the Mapleson D (Bain) system with the TSA for preoxygenation in healthy patients.

Main Methods:

A randomized study was conducted comparing the TSA and the Mapleson D (Bain) system.
Preoxygenation was performed using 4 liters of oxygen per minute for 3 minutes.

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Efficacy was assessed based on oxygenation levels (details not provided in abstract).

Main Results:

The Triservice Anaesthetic Apparatus (TSA) demonstrated unsatisfactory preoxygenation efficacy.
The Mapleson D (Bain) system proved suitable for preoxygenation.
The Bain system was found to be superior to the TSA in the randomized study.

Conclusions:

The Mapleson D (Bain) system is an effective and suitable alternative for preoxygenation in field settings.
Low fresh gas flow (4 L/min) is sufficient for effective preoxygenation with the Bain system.
Healthcare providers should consider the Bain system for preoxygenation, especially in resource-limited or field environments.