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common inhalational agents are halothane and ether, due to Acknowledgments
their lower cost. The Ohmeda Universal PAC drawover (Fig- Some of the content of this manuscript was developed from
2
ure 7), made famous during the Falkland War by the UK Royal course material presented at the Special Operations Medical
Navy and later deployed by the US military in Forward Surgi- Association Annual Conference, 2016, as part of the work-
cal Teams in Afghanistan and Iraq, was developed with ether as shop on Primitive Medicine.
the main inhalation agent, as well as halothane, isoflurane, and
enflurane. The drawover is a more advanced ether jar that com- Disclosures
pensates for temperature and allows for the addition of supple- The authors have indicated they have no financial relation-
mental oxygen, if present. The drawover limits the resistance of ships relevant to this article to disclose.
airflow and functions best in a drawover mode, but may be op-
erated in a pushover mode as well. The alphabetic permanent Author Contributions
14
scale printed on the drawover itself is graduated for ether and Both authors approved the final version of the manuscript
helps the operator choose the desired percentage delivered to the
patient. The dial controlling the percentage of agent delivered, References
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