A single vaporiser machine suits a department that has settled on one agent, and many have. Sevoflurane for induction and maintenance covers much general work, and on such a list, a second mounting position is hardware acquired and then never used. Where agents are alternated, the picture changes. Exchanging a vaporiser by hand between cases is an interruption nobody wants mid-list, and removing it is precisely what the ADV version is for.
This single vaporiser machine shares all its limitations with its relatives. Air is not piped to the flowmeter block, so nitrous oxide dilutes every mixture, which rules the machine out in departments that avoid the agent or have removed the supply. Delivered volume starting at 50 ml keeps infant anaesthesia outside its range. Capnography appears nowhere on the sheet in any form, and British practice calls for it continuously through the whole of each case.
PEEP remains the question that decides everything else. Used as routine rather than rescue, it counters the lung collapse that begins soon after induction, and it is leaned on hardest in precisely the cases a general list throws up: larger patients, head-down positioning, and anything that runs long into an afternoon. Both HS-01B versions omit it from the printed mode list, while both of the larger Blackstone machines include it without qualification.
Medigear.uk establishes whether PEEP is genuinely unavailable, and on what basis, before putting this single vapouriser machine in front of any theatre.



